Reduced Engine Power
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
I believe you chimed in when I had this issue. I scaled mine 30%. It happened to be the magic number b/c at full boost I am at the end of the timing table. I was able to ramp timing down according to each lb of boost.
I would be surprised if this is not the issue after the OP's blower install.
I would be surprised if this is not the issue after the OP's blower install.
Thread Starter
Melting Slicks
Joined: Nov 2007
Posts: 2,144
Likes: 2
From: Conway AR
I just want to thank Kris for figuring it out and taken care of it. The car felt strong. The power was out at our local track due to weather yesterday so we didn't get any times. The track did arm drop so we did get some passes. I wore out a race car tho. That's all ways fun. Here is the final log file of the night. 
Last edited by Z06wanted; Jun 14, 2009 at 01:01 PM.
Drifting
Joined: Aug 2006
Posts: 1,629
Likes: 6
From: Little Rock Arkansas
There were several people telling Shane it was other problems causing the REP. Hell even LMR who tuned the car originally said it was something else. Thanks everyone for the help in finding the problem.
Drifting
Joined: Sep 2004
Posts: 1,464
Likes: 7
Problem solved!!!!!!!!!!!!!!
Reduced engine power was due to maxing out the calculated air table. I had to scale the VE and the injectors back. I also tuned it for meth.
Still have way high IAT's. 250 at the end of a run at the track. This is with 8% of the fuel being pulled out do to the amount of 100% meth being injected.
Reduced engine power was due to maxing out the calculated air table. I had to scale the VE and the injectors back. I also tuned it for meth.
Still have way high IAT's. 250 at the end of a run at the track. This is with 8% of the fuel being pulled out do to the amount of 100% meth being injected.
Kris I am glad you were able to help Shane out. Seems funny to me that you can pay someone good money for a service and have to have your friends fix the problem they left. I know he is very appreciative. Can’t wait to see how he does when all is working and dialed in.
Drifting
Joined: Aug 2006
Posts: 1,629
Likes: 6
From: Little Rock Arkansas
This is my first FI car to tune on and I was very very worried making changes. It was out of my safety zone. I don't know how many times I told him to watch the wide band. This is the 2nd time I trailered him to the track and tuned on the car. I am happy with the results and happy for Shane.
Thanks to all who helped
Kris
Melting Slicks
Joined: Jul 2008
Posts: 3,002
Likes: 216
From: Houston Texas
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Congratulations to the people involved that figured it all out. This is the way that a car should be tuned. I drive my car on the street and at the track, not on the dyno.
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Melting Slicks
Joined: May 2004
Posts: 2,118
Likes: 12
From: 918 OK
Sorry to bring this back from the dead. This post has been extremely helpful to me. As the 1278 has been killing me slowly ever since my blower install. We will be scaling back the VE and injectors in mine soon, and hopefully this cures me as well. Will keep you updated.
Thread Starter
Melting Slicks
Joined: Nov 2007
Posts: 2,144
Likes: 2
From: Conway AR
No problem man. I spent 650 on a dyno tune threw LMR and they didn't even scale it back. Kris scaled mine back and it worked great after words. It suxs to drive 9 hours for a tune one way. Get back home take it to the track and have issues with it. Call LMR and they tell me I will have to bring it back to them. Also they even quit answering my phone calls. I hope this helps.
Melting Slicks
Joined: May 2004
Posts: 2,118
Likes: 12
From: 918 OK
Wow, that just sux. We tried all kinds of things with the shift points. Mine's an A4 and we thought it was in the tranny shifts the whole time. A little research on the forums and now finally something new to try. Man, I hope this works.
Pro
Joined: Sep 2008
Posts: 626
Likes: 1
From: Oswego NY
reduced engine power
I had the same problem to, it was the air intake temp wire cam unplugged half way down the track. Plugged it back in and it was fine. I didnt read all the posts i just saw reduced engine power and responded. Hopefully this will help goodluck.
Melting Slicks
Joined: May 2004
Posts: 2,118
Likes: 12
From: 918 OK
Well, after a day of tuning the magical number was 2.26grams p/cyl. Once we got below that, the REP was no more!!!! I'm so glad I found this thread and a couple others that gave us something new to try.
However, we learned it's time to upgrade my fuel system as the LPE pump can't keep up after 5800 rpm in these 40* degree temps. Man, is the car making some power!!
However, we learned it's time to upgrade my fuel system as the LPE pump can't keep up after 5800 rpm in these 40* degree temps. Man, is the car making some power!!
