Kinugawa 25g turbo thread
thanks for tryin. last night after I made this post I got to reading about unplugging the tps. I did and the car ran great!!!! I will order another one. what does the tps actually do that is so important anyways.
Evolving Member
Joined: Mar 2013
Posts: 130
Likes: 0
From: Encino,CA
Need some help figuring something out.. I'm in the process of tuning and I'm looking at my MAF lbs/min. For some reason the keep jumping up and down and very skewed. I want to know what you guys think of this. Here is a little pic from my log and you can see the pull from when I floored it etc... any Ideas?
I would have the car 100% complete and tuned and a video for you guys.. if I could figure out my nightmare. Horrible bucking,hesitiation, at low rpms on slow take off up to around 2500k rpms then it gets better and i barely feel any if any hesitation. The ecu map is 100% not to blame. new spoolinup cop kit. new spark plugs pregapped to 0.26 tried the working ngk's had on the car before. Fuel pressure good.. No boost leaks or any leaks at the new injectors. Injectors scaled properly. I tried taking closed loop out of the equation and didn't help. TPS seems to be working properly however I am going to check the voltage tomorrow just in case. Not throwing any codes other than the p0090 and another egr code since i just got rid of that stuff. The tune is actually really close should have NO problem with that. Hmm no leaks of any kind. Timing is dead on for sure. Let's see we also checked battery voltage 100% good all the time hence the alternator is good. It is brand new. It's late but we have checked many a things. the hesitation is so bad afr's all of a sudden fluctuate to where they drop off the charts and no reading from the wideband.then if i can get it to accelerate by adding gas pedal and then get it up in the rpms it seems to run great. any ideas? i could go on with what we have tried but i appreciate any ideas.. thanks! I want to prove this turbo can hit a 10 second quarter mile!
Are u on speed density or maf? if you send me your rom along with a log i can try to pin point your problem, let me know. https://www.facebook.com/DmtTuning
Are u on speed density or maf? if you send me your rom along with a log i can try to pin point your problem, let me know. https://www.facebook.com/DmtTuning
Evolving Member
Joined: Mar 2013
Posts: 130
Likes: 0
From: Encino,CA
[edit] this reminds me of what my car was doing a while back. i think it was because of my wastegate.
Evolving Member
Joined: Mar 2013
Posts: 130
Likes: 0
From: Encino,CA
I have the billet kinugawa actuator with a 1bar spring. I'm guessing it might be WG flutter and that 1bar spring is not strong enough. I don't get it though, with my EFR I boosted 29psi fine with 1bar. I'm guessing this turbine housing it just completely different and causing it to flutter..
This is the picture of my 25g kit.
Newbie
Joined: May 2013
Posts: 23
Likes: 0
From: Atlanta
Payam...it could be a couple things but looking at your log your boost is inconsistent indicated by the boost low res PID. The line is just a jagged fluctuation thru the pull. Which leads me to believe your assumption is correct
Evolving Member
Joined: Mar 2013
Posts: 130
Likes: 0
From: Encino,CA
Yea, but it's weird its only at those RPMS and only at WOT. When it hits redline it smothens out and actually hits 23 psi. Today I did half throttle and it hit 14 psi and no surge. If I did WOT and it hit 14 psi the same RPM it would surge or flutter I guess. Idk. I'm going to order a 1.5 bar spring I guess should be good enough.. Maybe even a diaphram just to be sure. This wastegate thing is a pain in the ***. I hope this is the issue.
Evolving Member
Joined: Mar 2013
Posts: 130
Likes: 0
From: Encino,CA
Most resent results with the 25g, Evo 8 High comp 2.0, 2150 injectors, E85, Tuned on speed density by DMT tuning, 548Hp 436Tq at 34 psi.
Last edited by WestSideBilly; Sep 7, 2013 at 02:57 PM. Reason: Removed vendor link