Slow98teg RDX build
02-25-2015, 05:09 PM
#1
Racer
Thread Starter
Slow98teg RDX build
Finally got around to putting my rdx on the dyno today. I wanted to get some baseline numbers before we couldn't go back to the stock map. Only current mods are a 3" intake and street tune by my good friend Derek at Innovative Motorworks. Dotted line is intake with the stock tune. Solid line is intake with street tune. Wasn't worried about anymore tuning seeing as its still restricted via the stock exhaust. I already have injectors for it and parts to make a downpipe. We will probably do a 3" aluminum midpipe to the stock muffler for now. See how my wife likes the sound first. Sometime down later in the spring fab up a fmic along with a rbc.
02-25-2015, 08:38 PM
#2
RDX faN BoY
Nice man! I need to hit the dyno before I start going crazy. I am on a 3rd revision of my vitune and the smile on my face is huge. With a little tuning man these things rip! Can't wait to see what the mods do for ya!
02-26-2015, 07:51 PM
#4
that seems like its on the low side. but maybe for the mods you have you could be right on the money. let me know when you decide to get that front mount. and since your relatively local you can see what a down pipe and an ETS intercooler feel like. the factory cats KILL this thing they really need to go.
02-27-2015, 10:11 AM
#7
Intermediate
The tune has a bunch of room left in it; cam timing hasn't been moved, and ignition is just moved around enough to keep the knock sensor happy. The tests were performed in 2nd gear, also, as 3rd gear runs were taking forever to complete, doing weird oscillations with the boost curve/torque curve.
The turbo's on these cars are stupid small.
The exhaust manifold is also a hindrance.
The turbo's on these cars are stupid small.
The exhaust manifold is also a hindrance.
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03-05-2015, 12:44 PM
#9
Nice to see some numbers. For a comparison, I put down 223whp and 242wtq with only a catback on my 2006 Mazdaspeed6 on a Mustang AWD dyno.
I did think it would be a bit higher as well. I'm sure that auto trans is sapping a lot of power.
Definitely will follow your progress, thanks for posting.
Has anyone done any PnP on their exhaust manifold or intake manifold yet?
I did think it would be a bit higher as well. I'm sure that auto trans is sapping a lot of power.
Definitely will follow your progress, thanks for posting.
Has anyone done any PnP on their exhaust manifold or intake manifold yet?
08-09-2015, 11:20 AM
#10
Racer
Thread Starter
So I haven't done anything with the car. Today we decided remove the prop shaft and put it on the dynapak. It's a quieter machine to run to be able to hear the engine. Still only has an intake and flashpro. Everything else is 100%stock. We loaded the stock map on and it made 189hp/213tq. Next we loaded the map on that was just street tuned. That is the dotted line you see in the graph. Then my tuner went to town and picked up solid gains. I still have all the parts to make a downpipe, just not much time.
08-09-2015, 11:52 AM
#11
Drifting
Innovative MotorWorks, I think they tuned a Full-Race RSX to 636WHP and 502 tq. Good tuner. Drop some dough and I'm sure they can make you a 450+ RDX. Damn, wish I lived in PA....
08-09-2015, 12:06 PM
#12
Racer
Thread Starter
Probably! He's done quite a lot of impressive cars. As much as I'd love to go crazy, it'll probably never see more than full bolt ons. If hondata gets the ball rolling on incorporating the gm flex fuel sensor like the kpro v4 I had on my integra, it would see e85 as well. We have two stations within 10 mins of our house and another 20 mins away.
08-09-2015, 12:32 PM
#14
Racer
Thread Starter
Oh I know. Well aware of that. Ive been using e85 since 2009. I meant the support of the gm flex fuel sensor so it changes maps on its own based on the ethanol percentage. My integra with v4 kpro was that way. Granted I never put in 93 except to tune it, i just did it to get the ethanol compensation tables.
08-10-2015, 02:00 PM
#16
Racer
Thread Starter
Today at work I made a very simple spray bar for the intercooler. I forgot to measure the opening on the intercooler shroud before I left for work. Just made it 12" long. This weekend I'm bracket racing the RDX at Import face off in Pittsburgh. Looks to be hot so I wanted to try out a spray bar to keep runs consistent.. Pretty much going to remove the windshield wipers, and run the washer line to the bar. Spray going down the track using the steering column switch. I might have time to hook it up tonight and check out what IAT's look like. If it has good results, I'll make a junkyard run and get a separate bottle and use some sort of WOT switch.
Also I want to attempt a small meth kit to use while brake boosting during a launch. We've tried to richen it up while doing a launch but it stays at 14ish AFR only building 3-4psi. I don't like being that lean. I wish we could ditch the 20% throttle plate limit but Hondata says no for now. I don't see a point to having a launch control when you can't use it. Unless you want to neutral drop it and kill your trans.
Also I want to attempt a small meth kit to use while brake boosting during a launch. We've tried to richen it up while doing a launch but it stays at 14ish AFR only building 3-4psi. I don't like being that lean. I wish we could ditch the 20% throttle plate limit but Hondata says no for now. I don't see a point to having a launch control when you can't use it. Unless you want to neutral drop it and kill your trans.
08-11-2015, 09:08 AM
#18
Drifting
It's a RDX for Pete's sake. We are lucky to even have the flashpro. There are a lot of things on there that we can't use. I'm just happy we've gotten this far. We could get a lot further but that would result in members giving up their car for long periods of time.. I'm kinda in that situation. I have a paid in full RDX just sitting in the garage trying to better the furture of the RDX. I'm sure if Hondata had an RDX in their possession, they could get stuff done. You down?
08-22-2015, 11:33 AM
#21
Racer
Thread Starter
Earlier this week I remembered I had a thermal intake gasket ftom my car. Put it on today while mine is down. Noticeable 10 degrees cooler on IAT's. Also scooped up some ID1000'S from a friend this week. Just need clips before they go in. Trying to schedule time to make this downpipe/midpipe also.
09-02-2015, 06:34 PM
#22
Racer
Thread Starter
So I've been trying to get around the 20% throttle limitation during holding the brake and gas for a launch. We will probably never have access to adjust this via Hondata which is understandable as it'll probably save the transmission. But I've been trying to figure out a way to add a couple more psi during launching. As of right now I only see 3psi. I may be able see a little more once the cats are gone. Then it finally hit me the other week. Bigger throttle body. Thankfully all DBW throttle bodies for Honda have the same bolt pattern and connector plug. I found this j35 throttle body for $45 shipped. Below are the measurements of stock and the j35. I will be putting this on tomorrow. I have to pull the manifold off and bore the throttle opening to match. Very simple with a die grinder.
So a 4mm difference in throttle plate diameter. I'm hoping to see 2-3psi more during a launch. May work, may not. I need to make a fitting to hook back up for the vacuum line that's on the stock throttle body. It was a map sensor port on the j35 TB. Coolant lines won't be hooked up as they've been bypassed for awhile.
There are bigger oem honda throttle bodys. Zdx and the tl sh-awd throttle body is the biggest. The zdx from what I've seen measures close to 67 or 68mm at the plate and the TL sh-awd measures 70mm. A lot of the 8th gen Si guys upgrade to these with no issues.This throttle body just fits the factory coupler with a little force. I'll report back tomorrow on how it goes.
So a 4mm difference in throttle plate diameter. I'm hoping to see 2-3psi more during a launch. May work, may not. I need to make a fitting to hook back up for the vacuum line that's on the stock throttle body. It was a map sensor port on the j35 TB. Coolant lines won't be hooked up as they've been bypassed for awhile.
There are bigger oem honda throttle bodys. Zdx and the tl sh-awd throttle body is the biggest. The zdx from what I've seen measures close to 67 or 68mm at the plate and the TL sh-awd measures 70mm. A lot of the 8th gen Si guys upgrade to these with no issues.This throttle body just fits the factory coupler with a little force. I'll report back tomorrow on how it goes.
09-02-2015, 06:40 PM
#23
Racer
Thread Starter
BTW this the what the car looks like. Never posted a picture. Aspec from lip and Mugen GP wheels. We had these wheels on our 04 TSX but that was rear ended and deemed totaled.
09-03-2015, 09:51 AM
#25
Racer
Thread Starter
No I'm port matching the manifold inlet. Im not messing with the throttle body. My wording was off a little bit. I work in a machine shop, work with lathes and mills every day. Just finished the vacuum port nipple and will have it welded after work.
09-03-2015, 07:14 PM
#26
Racer
Thread Starter
Well.....bad news first. Cracked the manifold on the end closest to the trans when tightening the bolts back up. Good news is I just bought a new manifold for $125 shipped from Western pa. Hopefully be here Tuesday. 4.5hr drive so I'll just wait til it comes in and port match that one again. Only took 15mins to port match it. Slightly more good news, possibly, saw 5psi while brake boosting. But it could see a little more once the new manifold is on. Guess we'll wait and see. So that comes in and I'll port match it and install the ID1000's and tune for e85 next week. Then track day on next Saturday. Hopefully Josh(thewrench) can make it out.
09-05-2015, 10:42 AM
#27
Drifting
09-08-2015, 05:16 PM
#29
Racer
Thread Starter
New intake manifold came in today. Got it port matched again. Also ordered a DW65c fuel pump. Didn't want to run out of pump for e85. Plus it'll be good down the road for more power. Installing injectors, fuel pump, and manifold Thursday. Retouching up the 93 octane map then putting in E85.
09-10-2015, 07:50 PM
#31
Racer
Thread Starter
Installed the ID1000's, dw65c pump and new intake manifold today. Everything went smooth. Retouched up the tune for 93oct on the dyno then drained out the tank and filled up with e85. We had two runs that we added boost and it spiked 18psi and made 360-370tq. That's way too much being stock everything. Below is the final gains. Injector duty cycle is around 60%. Looking into picking up a bigger trans cooler and will be changing the trans fluid Saturday. Track day know Sunday. Should be able to crack a.13.XX@98mph and break the stock turbo record. Also tested a launch and saw 5psi. So the j35 TB is working if any of you guys want to upgrade.
09-15-2015, 05:52 PM
#33
Racer
Thread Starter
Decided it was a good idea last Saturday to upgrade the trans cooler and change fluid. Went to NAPA and picked this up for $70. I used the stock upper mounting bracket and just drilled a hole in the cooler to use both mounting holes. If I can get another free weekend I will probably add the stock cooler as well. Little more cooling won't hurt.
Also for anyone who wants to swap wheels and run at the track, VSA can't be turned off if the tpms light is on. I borrowed a set of 225-45-17. Drove all day Saturday with them then up to the track. Tpms light came on on the way up. Never thought anything of it as my past cars never were affected a tpms light. I ended up pulling a speed sensor so VSA was disabled but so was SH-AWD. Only ran a few times fwd and it was horrible. Managed a 14.6 though. Wheel hop was horrendous.
Also for anyone who wants to swap wheels and run at the track, VSA can't be turned off if the tpms light is on. I borrowed a set of 225-45-17. Drove all day Saturday with them then up to the track. Tpms light came on on the way up. Never thought anything of it as my past cars never were affected a tpms light. I ended up pulling a speed sensor so VSA was disabled but so was SH-AWD. Only ran a few times fwd and it was horrible. Managed a 14.6 though. Wheel hop was horrendous.
10-31-2015, 01:05 PM
#34
Racer
Thread Starter
Ordered parts to make a downpipe, 3.5" intake and 3" aluminum midpipe to the stock muffler. Scheduled date for the 13th and one more track day on the 14th. Planning to weigh everything that comes off and goes on.
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TheWrench116 (11-01-2015)
11-01-2015, 08:12 PM
#36
Racer
Thread Starter
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TheWrench116 (11-01-2015)
11-28-2015, 08:17 PM
#38
Racer
Thread Starter
Yesterday and today we finally got around to making the downpipe, midpipe and 3.5" intake. The 2nd cat and midpipe came right off as one piece within 5 mins. And then the battle began getting the broken heatsshield bolts off of the cat. That was probably the longest part lol. After that everything else was cake. I did not expect to the stock muffler to sound as loud as it did on initial startup. It sounds good. Really quiet when driving and hear the faint turbo spool. Dip into the throttle a little and you definitely hear it. Going to hit the dragstrip once more next Saturday and see what we can do.
11-28-2015, 08:41 PM
#40
Drifting
Can IMW do some cosmetic upgrades for us? This cheap "world record" build is getting boring... Ask them to talk with shop for other things, trying to hit the car shows next year would love to have a carbon fiber hood to go with all my other show goodies!