Disapointed with the Track
#1
Instructor
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: Ann Arbor
Age: 39
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
Disapointed with the Track
So I took the car to the track today, a week after my tune and dyno.
My two better runs were 14.20 @ 99.2 (2.2 60') & 14.27 @ 99.9 (2.35 60')
Considering the fact that I've added rims, tires, shocks, intake, plenums, mounts a neo and had it tuned and only ran 0.15 better, I m really disappointed. I also trapped almost three mph lower then before, which just blows my mind.
I trapped at 101 or 102 last time with a 14.35.
I am sure that if someone was a better driver they could do a little better then me, but how are people running mi-13s ?!
My two better runs were 14.20 @ 99.2 (2.2 60') & 14.27 @ 99.9 (2.35 60')
Considering the fact that I've added rims, tires, shocks, intake, plenums, mounts a neo and had it tuned and only ran 0.15 better, I m really disappointed. I also trapped almost three mph lower then before, which just blows my mind.
I trapped at 101 or 102 last time with a 14.35.
I am sure that if someone was a better driver they could do a little better then me, but how are people running mi-13s ?!
#2
Three Wheelin'
Are your new rims and tires a larger overall diameter? Also were weather conditions worse this time? The guys in the mid 13's have a SC. I think a 14.2 is good, and your mph was lower because your 60" was lower. The 13's are hard to hit if you ask me.
#3
Banned
Join Date: Mar 2006
Location: Frederick, Maryland
Age: 41
Posts: 1,019
Likes: 0
Received 0 Likes
on
0 Posts
I will tell you right now that your little RT CAT is your problem. The cat is like 2 inchs and the rest of your exhaust is 2.5. You have all of those mods to pull in air but you dont have the right air to get the air out. Thats your problem. Last summer my car was running 14.1s @99 with only intake, header and crank pulley. STOCK EVERYTHING ELSE. And especially since ur MPH is lower than it was with less miles, thats clearly a loss in top end flow. 102 MPHs with what u have now should easily be pulling u 13.7s
#4
Instructor
18's are kind of big for your setup. Very nice for the street, but in terms of trying to get a fast 1/4 time, i recommend you run a smaller rim on the track. This will help improve your 60 foot time.
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec.
Another note, make sure that your flex pipe on the XS header is not leaking, as I know those always leak. I normally like to just cut out the flex that came on them and replace it with another flex pipe. If you listen to any of this advice, let me know how it works out for you. I am sure you will be happy.
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec.
Another note, make sure that your flex pipe on the XS header is not leaking, as I know those always leak. I normally like to just cut out the flex that came on them and replace it with another flex pipe. If you listen to any of this advice, let me know how it works out for you. I am sure you will be happy.
#5
Banned
Join Date: Mar 2006
Location: Frederick, Maryland
Age: 41
Posts: 1,019
Likes: 0
Received 0 Likes
on
0 Posts
18's are kind of big for your setup. Very nice for the street, but in terms of trying to get a fast 1/4 time, i recommend you run a smaller rim on the track. This will help improve your 60 foot time.
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec.
Another note, make sure that your flex pipe on the XS header is not leaking, as I know those always leak. I normally like to just cut out the flex that came on them and replace it with another flex pipe. If you listen to any of this advice, let me know how it works out for you. I am sure you will be happy.
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec.
Another note, make sure that your flex pipe on the XS header is not leaking, as I know those always leak. I normally like to just cut out the flex that came on them and replace it with another flex pipe. If you listen to any of this advice, let me know how it works out for you. I am sure you will be happy.
#6
Instructor
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: Ann Arbor
Age: 39
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
My tires are one size up (225/45ZR18) then what I needed, but they were 50% off at tirerack a while back. If I recall correctly the circumference is 2% larger then stock.
Power Rev,
Do you recommend going even smaller then the stock diameter? I imagine eventually I ll wont be able to get any traction, whats the sweet spot in terms of wheel diameter?
.
Are there other options then the RT Cat? I only bought it b/c I broke my regular Cat (long story) You guys don't make a 2.5" pipe spool piece to get rid of the cat, do you?
What brand flex pipe do you use? I guess I could get another set of headers and have a shop redo the flex pipe.
Power Rev,
Do you recommend going even smaller then the stock diameter? I imagine eventually I ll wont be able to get any traction, whats the sweet spot in terms of wheel diameter?
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec
Are there other options then the RT Cat? I only bought it b/c I broke my regular Cat (long story) You guys don't make a 2.5" pipe spool piece to get rid of the cat, do you?
Another note, make sure that your flex pipe on the XS header is not leaking, as I know those always leak. I normally like to just cut out the flex that came on them and replace it with another flex pipe.
#7
Instructor
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: Ann Arbor
Age: 39
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
Also, when do you guys shift? I did at redline at every gear, but with the huge drop off in tq at 6K, that may not be my best option.
http://docs.google.com/Doc?id=ddzzrccs_31q7vc6vpx
Is the goal to have the highest avg hp through the gear, or the highest avg tq, or some combination of the two?
http://docs.google.com/Doc?id=ddzzrccs_31q7vc6vpx
Is the goal to have the highest avg hp through the gear, or the highest avg tq, or some combination of the two?
Trending Topics
#8
Instructor
Join Date: Jan 2008
Location: Toronto
Age: 41
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Just came back from the track today -- 10 C (50 F) weather in Toronto.
The image may be a bit blurry but I ran 14.185 and a few other 14.1s
The image may be a bit blurry but I ran 14.185 and a few other 14.1s
Last edited by dru2; 10-18-2008 at 06:20 PM.
#9
Instructor
iTrader: (2)
Join Date: Jun 2005
Location: Windsor, ontario
Age: 38
Posts: 243
Likes: 0
Received 4 Likes
on
3 Posts
Also I can assure you that the RT cat is hurting your top end, as it really is to small of a diameter in and out, which is good for low end TQ, but not great for high RPM, and at the track you are in high RPM the whole time after your 60 foot. Change it to 2.5 in and out, and I can guarantee you that your HP will be higher in vtec.
#13
I have the Magnaflow High Flow Cat, I wonder if it runs into the same issues as the RT Cat:
http://www.hottexhaust.com/detail.asp?PRODUCT_ID=27403
From what I have found they say inlet and outlet are OE size. This might be a good replacement for you.
http://www.hottexhaust.com/detail.asp?PRODUCT_ID=27403
From what I have found they say inlet and outlet are OE size. This might be a good replacement for you.
Last edited by Moodist; 10-19-2008 at 10:15 AM.
#14
Banned
Join Date: Mar 2006
Location: Frederick, Maryland
Age: 41
Posts: 1,019
Likes: 0
Received 0 Likes
on
0 Posts
Not really, everyones cars run different and when your NA you have to keep in mind that all the mods have to work together and that one small issue like too much exhuast restriction can slow down all your potential. I mean going FI is on average adding a extra 60whp so all the back pressure in the world wouldnt stop a car for providing better results than it did NA even if its a little bit.
#15
Instructor
Join Date: Feb 2007
Location: westchester, ny or philly
Age: 38
Posts: 139
Likes: 0
Received 1 Like
on
1 Post
SkillOBskilled
What track did you run at? Your problem has to be traction or a slipping clutch. or the wheels are killing you. I would say traction or wheels since you didnt have the problem on the dyno.
I ran at atco last year completely stock and got a 14.42@96.76. and I know you have the HP and TQ to destroy that.
CLS6speed......I am impressed with his numbers even with the RT cat. Don't you think it would have shown up there if it was hurting him. I mean it could be hurting him but i dont think it should be hurting his qtr mile times.
What track did you run at? Your problem has to be traction or a slipping clutch. or the wheels are killing you. I would say traction or wheels since you didnt have the problem on the dyno.
I ran at atco last year completely stock and got a 14.42@96.76. and I know you have the HP and TQ to destroy that.
CLS6speed......I am impressed with his numbers even with the RT cat. Don't you think it would have shown up there if it was hurting him. I mean it could be hurting him but i dont think it should be hurting his qtr mile times.
#17
Instructor
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: Ann Arbor
Age: 39
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
I went to Atco. I ran 15.2 stock, granted that was a month after I learned how to drive manual.
A few people thought that RT cat is hurting me. Vince at R/T tuning said the same thing when I asked him where he saw room for improvement.
I ll will try to work the kinks out next season. Winter tires are going on soon.
A few people thought that RT cat is hurting me. Vince at R/T tuning said the same thing when I asked him where he saw room for improvement.
I ll will try to work the kinks out next season. Winter tires are going on soon.
#19
Senior Moderator
iTrader: (2)
The tires are hurting your gearing. That's the main problem. Your trapping high MPH & your 60's are reasonable. The car is sapping power at low rpm trying to turn those tires, The mods you have are making up for it on the top end hence your high trap MPH. By then it's to late though. You should be at least 13.9 with your 60 foot's.
If you ran 235-40 18 or 235-45-17, or even stock 215-50-17 you will see the times shrink.
If you ran 235-40 18 or 235-45-17, or even stock 215-50-17 you will see the times shrink.
#23
4drs just wanna have fun!
iTrader: (1)
So I took the car to the track today, a week after my tune and dyno.
My two better runs were 14.20 @ 99.2 (2.2 60') & 14.27 @ 99.9 (2.35 60')
Considering the fact that I've added rims, tires, shocks, intake, plenums, mounts a neo and had it tuned and only ran 0.15 better, I m really disappointed. I also trapped almost three mph lower then before, which just blows my mind.
I trapped at 101 or 102 last time with a 14.35.
I am sure that if someone was a better driver they could do a little better then me, but how are people running mi-13s ?!
My two better runs were 14.20 @ 99.2 (2.2 60') & 14.27 @ 99.9 (2.35 60')
Considering the fact that I've added rims, tires, shocks, intake, plenums, mounts a neo and had it tuned and only ran 0.15 better, I m really disappointed. I also trapped almost three mph lower then before, which just blows my mind.
I trapped at 101 or 102 last time with a 14.35.
I am sure that if someone was a better driver they could do a little better then me, but how are people running mi-13s ?!
Plus.... + have to toss this out there... make sure your IMRC plates are opening up.
Thread
Thread Starter
Forum
Replies
Last Post
emailnatec
5G TLX Tires, Wheels & Suspension
29
09-28-2018 04:27 PM
4drviper
3G TL Audio, Bluetooth, Electronics & Navigation
0
09-23-2015 09:00 PM
Mugen TSX
Eastern Canada
0
09-16-2015 09:52 PM
Mugen TSX
Eastern Canada
0
09-01-2015 11:11 PM