CLS'01 - OBX Headers - 226 hp -191 torque
09-12-2002 | 12:18 PM
#1
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
OBX Headers Dyno Graphs
First, let me say few words about the weather conditions:
Yesterday morning when I arrived at the Wang's Auto Sport. Temp was 76 and Humidity was 90%...
When I baselined my CL-S with CAI, Pulleys and Sparkplugs I was disappointed
with the result... I neted only 191 SAE WHP and a max of 175 lbft ot SAE toruque investigating... I discovered that the measured Humditity by the dyno at 54% rather then 90%.... I could not do anything about the dyno graph and the low numbers but to accept it as a relative baseline for the next dyno...
The Before Dyno:
http://www.flwse.com/images/nashua/O...rsDyno0012.jpg
Now 3 hr later the humidity dropped a bit and the dyno was reading a Humdity of 45%( too low, it should be int 85%!!) and temp stayed the same and it was bit windy.... and of course my CLS was cooled enough to be able to install the headers....
In Short, here is the After Dyno:
http://www.flwse.com/images/nashua/O...rsDyno0032.jpg
As you can see, SAE torque gains are from 20 lbft up to 30 lbft. and SAE WHP are from 20 WHP to 40 WHP.
I will upload all pictures and do a write up for now...Enjoy!
Edit: 01/17/03: The dyno was done in 2nd instead of the3rd, which resulted in lower numbers..
Yesterday morning when I arrived at the Wang's Auto Sport. Temp was 76 and Humidity was 90%...
When I baselined my CL-S with CAI, Pulleys and Sparkplugs I was disappointed
with the result... I neted only 191 SAE WHP and a max of 175 lbft ot SAE toruque investigating... I discovered that the measured Humditity by the dyno at 54% rather then 90%.... I could not do anything about the dyno graph and the low numbers but to accept it as a relative baseline for the next dyno...The Before Dyno:
http://www.flwse.com/images/nashua/O...rsDyno0012.jpg
Now 3 hr later the humidity dropped a bit and the dyno was reading a Humdity of 45%( too low, it should be int 85%!!) and temp stayed the same and it was bit windy.... and of course my CLS was cooled enough to be able to install the headers....
In Short, here is the After Dyno:
http://www.flwse.com/images/nashua/O...rsDyno0032.jpg
As you can see, SAE torque gains are from 20 lbft up to 30 lbft. and SAE WHP are from 20 WHP to 40 WHP.
I will upload all pictures and do a write up for now...Enjoy!
Edit: 01/17/03: The dyno was done in 2nd instead of the3rd, which resulted in lower numbers..
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09-12-2002 | 12:38 PM
#11
Team Owner
Joined: Oct 2000
Posts: 20,014
Likes: 0
From: Hellertown, Pa. USA
Originally posted by hughesne
im still happy with my comptech purchase.
im still happy with my comptech purchase.
But for the Auto guys if the quality holds, I guess these suckers are the way to go.
Shawn S
09-12-2002 | 12:39 PM
#12
Suzuka Master
Joined: Sep 2000
Posts: 9,431
Likes: 0
From: Woodstock, GA
Originally posted by Shawn S
I thought 191 to 195 HP was a normal reading for a BONE STOCK Auto CL-S.
I thought 191 to 195 HP was a normal reading for a BONE STOCK Auto CL-S.
That baseline pull does look like something was wrong. With UR pulleys and Intake you should have easily been near 210 if not higher, but then again I can't say how much the wheels affect it.
But in the end it looks like you are right about where it should be with those mods.
Now I am curious if something mechanical had been wrong which was corrected, leaking stock manifold, etc.?? Or was there an ECU issue?? Did they disconnect the battery on the install??
09-12-2002 | 12:39 PM
#13
teh Senior Instigator
Joined: Sep 2000
Posts: 44,094
Likes: 979
From: Huntington Beach, CA -> Ashburn, VA -> Raleigh, NC -> Walnut Creek, CA
Originally posted by Shawn S
I thought 191 to 195 HP was a normal reading for a BONE STOCK Auto CL-S.
Shawn S
I thought 191 to 195 HP was a normal reading for a BONE STOCK Auto CL-S.
Shawn S
it all depends on conditions as he said. I've seen av6's and 3.0's w/ headers dyno less then me before. It depends on alot of things, the car, the conditions, etc.
09-12-2002 | 12:40 PM
#14
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
by any means, all what I can say... my dyno numbers SHOULD Be HIGHER correction factor used were1.0 instead of a higher number.... Humidity readings by the dyno were all wrong! It reads 54% down to 45% where weather.com was say 90% down to 85%!
You can draw whatever conclusions you want... the Dyno is here and it shows gains of up to SAE 40 WHP!!
You can draw whatever conclusions you want... the Dyno is here and it shows gains of up to SAE 40 WHP!!
09-12-2002 | 12:42 PM
#15
Suzuka Master
Joined: Sep 2000
Posts: 9,431
Likes: 0
From: Woodstock, GA
One reason for looking at the ECU potential is the A/F ratio change. Granted greater scavenging with the Headers can cause it to lean out a bit but this is a whole point. It also, based on the complete raising of the torque curve looks like there is more timing in the second pull.
09-12-2002 | 12:59 PM
#18
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
The wierdest thing that Today weather is:
Home > Local Forecast for Nashua, NH (03060)
Current Conditions
66°F
Sunny Feels Like
N/A°F
UV Index: 7 High
Dew Point: 32°F
Humidity: 28%
Visibility: Unlimited miles
Pressure: 29.91 inches and falling
Wind: From the North Northwest at 9 gusting to 17 mph
As reported at Nashua, NH Last Updated Thursday, September 12, 2002, at 12:45 PM Eastern Daylight Time.
Ahhh, if the installation and dyno was done today!!!!
Home > Local Forecast for Nashua, NH (03060)
Current Conditions
66°F
Sunny Feels Like
N/A°F
UV Index: 7 High
Dew Point: 32°F
Humidity: 28%
Visibility: Unlimited miles
Pressure: 29.91 inches and falling
Wind: From the North Northwest at 9 gusting to 17 mph
As reported at Nashua, NH Last Updated Thursday, September 12, 2002, at 12:45 PM Eastern Daylight Time.
Ahhh, if the installation and dyno was done today!!!!
09-12-2002 | 01:02 PM
#19
Racer
Joined: Aug 2001
Posts: 421
Likes: 0
From: Stamford, CT
Those are impressive numbers!
Just to be scientific about it, I'm waiting to see digitalgm's results from his dyno, b/c as with any testing several tests need to be done to prove constant results and eliminate any deviation due to unknown variables. If they are similar to these results, then look out group buy, cause here I come!!!!
Just to be scientific about it, I'm waiting to see digitalgm's results from his dyno, b/c as with any testing several tests need to be done to prove constant results and eliminate any deviation due to unknown variables. If they are similar to these results, then look out group buy, cause here I come!!!!
09-12-2002 | 01:11 PM
#22
I LOVE MY CAR
Joined: Oct 2001
Posts: 3,266
Likes: 0
From: Chicago, IL (South Burbs)
Originally posted by Nashua_Night_Hawk
Shit, I paid the full $495 who is gona help me with $120 difference... Someone make some paypal donation checks for me please ....
Shit, I paid the full $495 who is gona help me with $120 difference... Someone make some paypal donation checks for me please ....
Anyway, the Numbers look good, but I agree that the baseline number appears to be way down.... Maybe something is wrong and once it's fixed it would lead to even HIGHER numbers/gains
09-12-2002 | 01:20 PM
#23
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
I will let EricL do the Dyno graph Analysis... BTW just the Hi-res pictures at 5500 rpm 6000 rpm and 6500 rpms.
Originally posted by JRock
What the hell kind of math are you using Nashua?
190-175 is 15torque
and
226-191 is 35 hp.
20-30lbft of torque?!
What the hell kind of math are you using Nashua?
190-175 is 15torque
and
226-191 is 35 hp.
20-30lbft of torque?!
09-12-2002 | 01:20 PM
#24
Drifting
Joined: Nov 2000
Posts: 3,373
Likes: 0
From: Chicago, IL USA
Theres nothing wrong with the baseline numbers. I was getting about the same before I installed the headers. I dont know how people were getting over 200hp with intake, because with just intake I was getting 192 or so. Nashuas dynos are right on the money if you ask me. Different dynos show different things. Crazy Acuras dyno was exactly like mine as well.
Originally posted by Dom418
I'll send $1... I would have sent more, but the waiting for the graph was driving me NUTS.
Anyway, the Numbers look good, but I agree that the baseline number appears to be way down.... Maybe something is wrong and once it's fixed it would lead to even HIGHER numbers/gains
I'll send $1... I would have sent more, but the waiting for the graph was driving me NUTS.
Anyway, the Numbers look good, but I agree that the baseline number appears to be way down.... Maybe something is wrong and once it's fixed it would lead to even HIGHER numbers/gains
09-12-2002 | 01:25 PM
#25
Old timer
Joined: Dec 2000
Posts: 9,224
Likes: 1
From: .
Originally posted by Nashua_Night_Hawk
I will let EricL do the Dyno graph Analysis... BTW just the Hi-res pictures at 5500 rpm 6000 rpm and 6500 rpms.
I will let EricL do the Dyno graph Analysis... BTW just the Hi-res pictures at 5500 rpm 6000 rpm and 6500 rpms.
09-12-2002 | 01:32 PM
#26
Thanks Nashua!! Even if they are skewed (which i think not) those numbers alone make it enough to make the headers worth it. At that price even i can afford to buy headers.
thanks again, bro!!!
now...when is digitalgm doin his dyno :P
thanks again, bro!!!
now...when is digitalgm doin his dyno :P
09-12-2002 | 01:39 PM
#28
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
Okay... reading the Dyno... The before dyno showed a peak torque of 175.6 ft.lb at just 3200 rpm and start declining thereafter...
The max torque with headers was at 5800 rpms...
just look at 6500 rpm: Dyno Before shows a 155 lbft of torque and 190 WHP, with headers...it is 185 lbft and 225 WHP.
That is your 30 lbft of gain and 35 WHP.
Also, do the same at 7000 rpm: Dyno Before shows a 130 lbft of torque and 180 WHP, with headers...it is 165 lbft and 220 WHP.
That is your 35 lbft of gain and 40 WHP.
When comparing dyno graphs look at the same rpm... get it?
The max torque with headers was at 5800 rpms...
just look at 6500 rpm: Dyno Before shows a 155 lbft of torque and 190 WHP, with headers...it is 185 lbft and 225 WHP.
That is your 30 lbft of gain and 35 WHP.
Also, do the same at 7000 rpm: Dyno Before shows a 130 lbft of torque and 180 WHP, with headers...it is 165 lbft and 220 WHP.
That is your 35 lbft of gain and 40 WHP.
When comparing dyno graphs look at the same rpm... get it?
09-12-2002 | 01:47 PM
#30
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
And buy from SSAutoChrome.com... They have great service and quick shipping.. talk to Bucky!
BTW, I do not earn any sales commision does anyone want to donatesome $$ for me
BTW, I do not earn any sales commision does anyone want to donatesome $$ for me
09-12-2002 | 01:59 PM
#31
Suzuka Master
Joined: Nov 2000
Posts: 7,388
Likes: 1
From: Ninth Gate & So Cal
Originally posted by spiroh
Theres nothing wrong with the baseline numbers. I was getting about the same before I installed the headers. I dont know how people were getting over 200hp with intake, because with just intake I was getting 192 or so. Nashuas dynos are right on the money if you ask me. Different dynos show different things. Crazy Acuras dyno was exactly like mine as well.
Theres nothing wrong with the baseline numbers. I was getting about the same before I installed the headers. I dont know how people were getting over 200hp with intake, because with just intake I was getting 192 or so. Nashuas dynos are right on the money if you ask me. Different dynos show different things. Crazy Acuras dyno was exactly like mine as well.
I'd just like to know if the baseline is dead stock or it DOES have the pulleys. It makes a difference!
The baseline should be higher with the pulleys (if they were in there for the before run).
IMO, any temps above 85 degrees with high humidity will probably roll the timing back and show lower numbers. 60-70 degrees is optimal to make sure the advance is “up”.
I don't see any reason that the gains with the OBX should be just as high as the Comptech (they sure look close -- don't they?).Mike got some KILLER gains from his Comptech’s... so, why not the OBX?????
I'm mystified at the baseline IF there are pulleys on the car... and I really don't think it looks like a bad actuator. The torque peak moves up to around 6.1K which is what the headers do vs. stock. The stock rolls down at 5K, just as it's supposed to...
I wonder if the wheels... are canceling out the pulleys. And, I don’t remember the weight of the wheels on Nashau’s car (18” yes).
And, the pulleys really do help before and after (for relative gains). It is like subtracting weight off the DynoJet's roller, so any gain will be increased... (Hey, will one of you guys do a 4K – 5K oil analysis looking at lead/tin before and after install of UR pulleys. Anyone thinks its stupid – fine…)
Nashau, how many runs did you do before and after?
And, would you mind listing exactly what’s on the car:
On the "before" run
And
On the "after" run
TIA
09-12-2002 | 02:29 PM
#32
I love my CL-S
Joined: Jan 2001
Posts: 1,409
Likes: 0
From: canada
Originally posted by spiroh
Those numbers are about the same with all my mods. I dont think there is a big diff between the obx, and comptech. At this point everyone should just buy the obx headers.
Those numbers are about the same with all my mods. I dont think there is a big diff between the obx, and comptech. At this point everyone should just buy the obx headers.
what spiroh said
09-12-2002 | 02:41 PM
#33
PACDAT
Joined: Sep 2001
Posts: 849
Likes: 0
From: mississauga, canada
HOW THE HELL DID ASTROBOY GET 204 WHP AND 201 TQ from a STOCK TLS?!?!?!?..
his modded CL only gave 228 and 190somethin.. with comptech headers..CAI and VAFC.. !?. he musts got a special edition TLS...
his modded CL only gave 228 and 190somethin.. with comptech headers..CAI and VAFC.. !?. he musts got a special edition TLS...
09-12-2002 | 03:35 PM
#35
S/C'd Accord Coming Soon!
Joined: Jun 2000
Posts: 908
Likes: 0
From: Lafayette, LA | Houston, TX (Weekends)
Nashua, what time did you get to the shop at on Wednesday?
I know first hand that dyno'ing isn't cheap (I challenge anyone that has dyno'd their car as many times as I have) but the ideal scenario is to have 2-3 Before pulls and 2-3 After pulls.
Here is what I suspect happened. You arrive at the shop and shortly afterwards, (5-15 minutes) your car was strapped onto the dyno and a baseline run was done. Your car is now taken off, cools off, they install the new headers. Car is strapped back onto the dyno several hours after the baselines run with a cooled off engine. My theory is that the cooled off engine accounted for SOME of the gains you saw in your dyno and could also explain why the baseline was that low for Intake and UR Pulleys. (Remember these are the miracle pulleys that give you gazillion billion HP)
I want to thank you for taking the time AND money to have this done. I'm not knocking you in any way but simply trying to explain what *I* think happened with the dyno results.
Take care!
P.S. My last dyno on the Accord was 164hp. My stock pull was 154-155. Now look at my list of mods. Before I had the exhaust installed (my last mod) my baseline was 151hp, 4hp lower than when my car was stock. My highest dyno to date was low 170's after I had the AEM Pulleys installed.
I know first hand that dyno'ing isn't cheap (I challenge anyone that has dyno'd their car as many times as I have) but the ideal scenario is to have 2-3 Before pulls and 2-3 After pulls.
Here is what I suspect happened. You arrive at the shop and shortly afterwards, (5-15 minutes) your car was strapped onto the dyno and a baseline run was done. Your car is now taken off, cools off, they install the new headers. Car is strapped back onto the dyno several hours after the baselines run with a cooled off engine. My theory is that the cooled off engine accounted for SOME of the gains you saw in your dyno and could also explain why the baseline was that low for Intake and UR Pulleys. (Remember these are the miracle pulleys that give you gazillion billion HP)
I want to thank you for taking the time AND money to have this done. I'm not knocking you in any way but simply trying to explain what *I* think happened with the dyno results.
Take care!
P.S. My last dyno on the Accord was 164hp. My stock pull was 154-155. Now look at my list of mods.
Before I had the exhaust installed (my last mod) my baseline was 151hp, 4hp lower than when my car was stock. My highest dyno to date was low 170's after I had the AEM Pulleys installed.
09-12-2002 | 03:47 PM
#36
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
Reply is in Bold face:
Originally posted by EricL
I'd just like to know if the baseline is dead stock or it DOES have the pulleys. It makes a difference!
Yes, I had the Pulleys before and after.
The baseline should be higher with the pulleys (if they were in there for the before run).
Yes, I expected that the baseline is higher, I was disapointed, The only logical reasons for the low baseline number are:
1) 76 Temp, Humidity was 90%
2) Dyno was recording 54%-45% humidity. { wrong correction factors were used. BTW, Uncorrected numbers where something like peak 188 WHP... which mean the correction factor was 1.01 or +1%!!!) You do not correct with 1.01 if the Humidity was 90%!!!)
3) I have 18" rims with 235/40/18 Nitto tires. Each rim is weighing 23-24 lbs.
IMO, any temps above 85 degrees with high humidity will probably roll the timing back and show lower numbers. 60-70 degrees is optimal to make sure the advance is “up”.
I think this is one of the reason, the baseline dyno showed a rich mix...
I don't see any reason that the gains with the OBX should be just as high as the Comptech (they sure look close -- don't they?).Mike got some KILLER gains from his Comptech’s... so, why not the OBX?????
I'm mystified at the baseline IF there are pulleys on the car... and I really don't think it looks like a bad actuator. The torque peak moves up to around 6.1K which is what the headers do vs. stock. The stock rolls down at 5K, just as it's supposed to...
My Actuator is working
I wonder if the wheels... are canceling out the pulleys. And, I don’t remember the weight of the wheels on Nashau’s car (18” yes).
Maybe, Wang mentioned that my wheel setup is killing my engine
And, the pulleys really do help before and after (for relative gains). It is like subtracting weight off the DynoJet's roller, so any gain will be increased... (Hey, will one of you guys do a 4K – 5K oil analysis looking at lead/tin before and after install of UR pulleys. Anyone thinks its stupid – fine…)
Yes, that is correct too, Pulleys amplify the headers gains
Nashau, how many runs did you do before and after?
1 run before and 1 after.. I did not have a say of how many runs I can do... Wang was so busy he had to leave by 2:00 PM.
And, would you mind listing exactly what’s on the car:
On the "before" run:
- 3M clear bra, by Stonguard (full front bumper, and side mirrors, and partial hood)
- Acura Spoiler, Moonroof visor, Splash guards, Winter mats, Trunk liner
- Valentine V1 Radar Locator
- PIAA 19169 road lamps
- 03/19/01: Injen Polished CAI
- 04/13/01: 235/40/18 NITTO 555 on 18x7.5, +45 offset, Konig Imagine in Silver with wheels locks
- 10/11/01: Comptech Anti-Sway Bars
- 03/01/02: NGK Iridium IX Spark Plugs, ZFR6FIX-11, P.N. 6441
- 05/30/02: Unorthodox Racing Ultra SS Pulley Kit, Polished (Installed on 08/15/02)
On the "after" run
- 3M clear bra, by Stonguard (full front bumper, and side mirrors, and partial hood)
- Acura Spoiler, Moonroof visor, Splash guards, Winter mats, Trunk liner
- Valentine V1 Radar Locator
- PIAA 19169 road lamps
- 03/19/01: Injen Polished CAI
- 04/13/01: 235/40/18 NITTO 555 on 18x7.5, +45 offset, Konig Imagine in Silver with wheels locks
- 10/11/01: Comptech Anti-Sway Bars
- 03/01/02: NGK Iridium IX Spark Plugs, ZFR6FIX-11, P.N. 6441
- 05/30/02: Unorthodox Racing Ultra SS Pulley Kit, Polished (Installed on 08/15/02)
- 09/02/02: OBX Racing V6 Racing Headers (Installeded: 09/11/02)
TIA
I'd just like to know if the baseline is dead stock or it DOES have the pulleys. It makes a difference!
Yes, I had the Pulleys before and after.
The baseline should be higher with the pulleys (if they were in there for the before run).
Yes, I expected that the baseline is higher, I was disapointed, The only logical reasons for the low baseline number are:
1) 76 Temp, Humidity was 90%
2) Dyno was recording 54%-45% humidity. { wrong correction factors were used. BTW, Uncorrected numbers where something like peak 188 WHP... which mean the correction factor was 1.01 or +1%!!!) You do not correct with 1.01 if the Humidity was 90%!!!)
3) I have 18" rims with 235/40/18 Nitto tires. Each rim is weighing 23-24 lbs.
IMO, any temps above 85 degrees with high humidity will probably roll the timing back and show lower numbers. 60-70 degrees is optimal to make sure the advance is “up”.
I think this is one of the reason, the baseline dyno showed a rich mix...
I don't see any reason that the gains with the OBX should be just as high as the Comptech (they sure look close -- don't they?).Mike got some KILLER gains from his Comptech’s... so, why not the OBX?????
I'm mystified at the baseline IF there are pulleys on the car... and I really don't think it looks like a bad actuator. The torque peak moves up to around 6.1K which is what the headers do vs. stock. The stock rolls down at 5K, just as it's supposed to...
My Actuator is working
I wonder if the wheels... are canceling out the pulleys. And, I don’t remember the weight of the wheels on Nashau’s car (18” yes).
Maybe, Wang mentioned that my wheel setup is killing my engine
And, the pulleys really do help before and after (for relative gains). It is like subtracting weight off the DynoJet's roller, so any gain will be increased... (Hey, will one of you guys do a 4K – 5K oil analysis looking at lead/tin before and after install of UR pulleys. Anyone thinks its stupid – fine…)
Yes, that is correct too, Pulleys amplify the headers gains
Nashau, how many runs did you do before and after?
1 run before and 1 after.. I did not have a say of how many runs I can do... Wang was so busy he had to leave by 2:00 PM.
And, would you mind listing exactly what’s on the car:
On the "before" run:
- 3M clear bra, by Stonguard (full front bumper, and side mirrors, and partial hood)
- Acura Spoiler, Moonroof visor, Splash guards, Winter mats, Trunk liner
- Valentine V1 Radar Locator
- PIAA 19169 road lamps
- 03/19/01: Injen Polished CAI
- 04/13/01: 235/40/18 NITTO 555 on 18x7.5, +45 offset, Konig Imagine in Silver with wheels locks
- 10/11/01: Comptech Anti-Sway Bars
- 03/01/02: NGK Iridium IX Spark Plugs, ZFR6FIX-11, P.N. 6441
- 05/30/02: Unorthodox Racing Ultra SS Pulley Kit, Polished (Installed on 08/15/02)
On the "after" run
- 3M clear bra, by Stonguard (full front bumper, and side mirrors, and partial hood)
- Acura Spoiler, Moonroof visor, Splash guards, Winter mats, Trunk liner
- Valentine V1 Radar Locator
- PIAA 19169 road lamps
- 03/19/01: Injen Polished CAI
- 04/13/01: 235/40/18 NITTO 555 on 18x7.5, +45 offset, Konig Imagine in Silver with wheels locks
- 10/11/01: Comptech Anti-Sway Bars
- 03/01/02: NGK Iridium IX Spark Plugs, ZFR6FIX-11, P.N. 6441
- 05/30/02: Unorthodox Racing Ultra SS Pulley Kit, Polished (Installed on 08/15/02)
- 09/02/02: OBX Racing V6 Racing Headers (Installeded: 09/11/02)
TIA
09-12-2002 | 03:49 PM
#37
Suzuka Master
Joined: Sep 2000
Posts: 9,431
Likes: 0
From: Woodstock, GA
Originally posted by EricL
I'd just like to know if the baseline is dead stock or it DOES have the pulleys.
I'd just like to know if the baseline is dead stock or it DOES have the pulleys.
I too am curious about the weight of those wheels???
09-12-2002 | 03:57 PM
#38
Thread Starter
Happy CL-S Pilot
Joined: Jan 2001
Posts: 9,215
Likes: 1
From: Nashua, NH, USA
Originally posted by BNut
Nashua, what time did you get to the shop at on Wednesday?
I know first hand that dyno'ing isn't cheap (I challenge anyone that has dyno'd their car as many times as I have) but the ideal scenario is to have 2-3 Before pulls and 2-3 After pulls.
Here is what I suspect happened. You arrive at the shop and shortly afterwards, (5-15 minutes) your car was strapped onto the dyno and a baseline run was done. Your car is now taken off, cools off, they install the new headers. Car is strapped back onto the dyno several hours after the baselines run with a cooled off engine. My theory is that the cooled off engine accounted for SOME of the gains you saw in your dyno and could also explain why the baseline was that low for Intake and UR Pulleys. (Remember these are the miracle pulleys that give you gazillion billion HP)
I want to thank you for taking the time AND money to have this done. I'm not knocking you in any way but simply trying to explain what *I* think happened with the dyno results.
Take care!
P.S. My last dyno on the Accord was 164hp. My stock pull was 154-155. Now look at my list of mods. Before I had the exhaust installed (my last mod) my baseline was 151hp, 4hp lower than when my car was stock. My highest dyno to date was low 170's after I had the AEM Pulleys installed.
Nashua, what time did you get to the shop at on Wednesday?
I know first hand that dyno'ing isn't cheap (I challenge anyone that has dyno'd their car as many times as I have) but the ideal scenario is to have 2-3 Before pulls and 2-3 After pulls.
Here is what I suspect happened. You arrive at the shop and shortly afterwards, (5-15 minutes) your car was strapped onto the dyno and a baseline run was done. Your car is now taken off, cools off, they install the new headers. Car is strapped back onto the dyno several hours after the baselines run with a cooled off engine. My theory is that the cooled off engine accounted for SOME of the gains you saw in your dyno and could also explain why the baseline was that low for Intake and UR Pulleys. (Remember these are the miracle pulleys that give you gazillion billion HP)
I want to thank you for taking the time AND money to have this done. I'm not knocking you in any way but simply trying to explain what *I* think happened with the dyno results.
Take care!
P.S. My last dyno on the Accord was 164hp. My stock pull was 154-155. Now look at my list of mods.
Before I had the exhaust installed (my last mod) my baseline was 151hp, 4hp lower than when my car was stock. My highest dyno to date was low 170's after I had the AEM Pulleys installed.
I dynoed my first baseline at 10:41 AM almost 56 minutes after I arrived... when I open the hood for the gnition hookup I found that the CAI was very hot... so I started the fan too cool the engine down which it did to point that I can feel the CAI is warm not very hot:
BNut you could be right ... I suspect the humidity and temp are big factor.
09-12-2002 | 05:39 PM
#39
Banned
Joined: Jan 2001
Posts: 9,151
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From: Somewhere between here and there, yet neither.
Hmmm...if those are the gains with the UR Pulleys....pull those suckers off cuz they are robbing your car of power.... I dyno'd the same thing, albeit 2 more whp.....with short ram (which supposedly cant compare with the CAI you all have), AEM pulleys ( they do a lot of good, but they look nice..) and CT headers.
) and CT headers.
09-12-2002 | 06:00 PM
#40
Old timer
Joined: Dec 2000
Posts: 9,224
Likes: 1
From: .
Anyway, something I posted in the other thread that is now closed:
Hey I wonder... someone with all the mods Nashua has should put on stock exhaust manifolds and dyno. Then strap on comptech headers and dyno. I bet you get the same increase or more because it's the other mods that are allowing the headers to appear to give a bigger gain because they improve the intake and lighten the pulleys.