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Subject Street-tuning ConVerTT v2.0
     
Posted by ConVerTT on September 07, 2009 at 11:38 AM
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Message v2.0 has been running for about a week and I have been logging and tuning like a madman with Nistune.

My profile is up to date but the key specs are:

10.5:1 compression ratio
twin gt28rs turbos
nismo 740 cc injectors
msp manis
SZ expansion downpipes and testpipes
dual EGT sensors and WB02 sensors


This morning I managed to boost 12 psi without issue (except a boost spike to 13psi limiter in second gear). No sign of detonation.

Here is a screen shot of the second and third gear pull from Nistune:

As you can see on the AFR 3D trace, AFR under load is a little rich at 11.5 and EGT's are acceptable at 860 at WOT.

The injector duty cycle is still under 50 percent.

I will probably adjust the maps so that the AFR is closer to 12.0 and then check the EGTs.

12 psi was a lot of fun - actually a little bit scary. Grip was a little iffy and there was more lag than I expected so it caught me a little off gaurd.

I probably need to do some work on the boost transition part of the map to smoothe it out a little bit.

Based on this data, I think that there is room to go a little further.

Nistune Rocks :) Absolutely :)


Here is a shot of the 10 psi run that I logged the other day. I am pretty happy with the fuel map - pretty much dialed in to 12 AFR - under this load condition.


     
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