'86 Turbo Dyno ...again
#1
'86 Turbo Dyno ...again
Perhaps some of you recall I dynoed my then stock '86 turbo last fall:
I then pulled the engine for a reseal. I added chips, gutted cat/3" catback, rebuilt the K26/6, wrapped the crossover, TiAL 38mm w/ LBC, 5-angle valve job, 3.0 bar FPR and a Fidanza flywheel.
Check out the AFRs. Way too rich, right? Why? Need more boost, different maps? I'm not much of a tuner.
I don't think correction was added for either run - now/then, and the temps were higher today by 30 degrees. On a cool day, I can get full boost by 2800RPM with the TiAL as indicated by the car's tach and an autometer gauge.
Superimposed now(blue)/then(green):
I then pulled the engine for a reseal. I added chips, gutted cat/3" catback, rebuilt the K26/6, wrapped the crossover, TiAL 38mm w/ LBC, 5-angle valve job, 3.0 bar FPR and a Fidanza flywheel.
Check out the AFRs. Way too rich, right? Why? Need more boost, different maps? I'm not much of a tuner.
I don't think correction was added for either run - now/then, and the temps were higher today by 30 degrees. On a cool day, I can get full boost by 2800RPM with the TiAL as indicated by the car's tach and an autometer gauge.
Superimposed now(blue)/then(green):
#5
Seems VERY rich. I dont understand why you are only at 10psi of boost too at redline. I can hold up to 16ish psi at redline with a tial 38 and MBC. try turning up your boost controler to smooth out your boost curve. what spring does your tial 38 have? 1bar im guessing?
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#9
Here is my dyno chart. I have MAF but no valve job like you.
Run was at 15psi (15.3psi max) with a bad tune. this was a run while I was tuning on the mafterburner.
you can see that my tq curve is much more linear and was holding 15psi very well. I have had it up to 16-16.5ish psi in 4th at redline...
try turning up your boost controller for a run and see what your boost curve does. do you have a boost guage? just dont go too high...
Run was at 15psi (15.3psi max) with a bad tune. this was a run while I was tuning on the mafterburner.
you can see that my tq curve is much more linear and was holding 15psi very well. I have had it up to 16-16.5ish psi in 4th at redline...
try turning up your boost controller for a run and see what your boost curve does. do you have a boost guage? just dont go too high...
#11
Did the 88's have a 26/6? Did YOURS (JE_)when you dyno'd it? I not sure if your comparing apples to apples. My K26/6 couldn't hold more than 13 at redline. Neither can anyone elses I've seen on here. Sooo. I don't think that's the turbo you were dynoing and or the same one tyro has.
TYRO... Did you tell Russell that you had a 3bar FPR? EIther way though. Just send him your AFR's and he'll straighten it out for you.
TYRO... Did you tell Russell that you had a 3bar FPR? EIther way though. Just send him your AFR's and he'll straighten it out for you.
Last edited by 95ONE; 07-29-2007 at 03:00 PM.
#15
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Originally Posted by 95ONE
Did the 88's have a 26/6? Did YOURS (JE_)when you dyno'd it? I not sure if your comparing apples to apples. My K26/6 couldn't hold more than 13 at redline. Neither can anyone elses I've seen on here. Sooo. I don't think that's the turbo you were dynoing and or the same one tyro has.
TYRO... Did you tell Russell that you had a 3bar FPR? EIther way though. Just send him your AFR's and he'll straighten it out for you.
TYRO... Did you tell Russell that you had a 3bar FPR? EIther way though. Just send him your AFR's and he'll straighten it out for you.