Who wants a good laugh-Read here!
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Who wants a good laugh-Read here!
This guy is a supposedly a tuner who is selling turbo kits and this is what he thinks is appropriate AFRs for high compression,boosted cars,with no intercooler,running on 91 octane gas.I would love to hear from some of our professional tuners here about what you think
Quote:
Originally Posted by SpeedForceRacing
I will go get the same type of readout from the exact same dyno,done by the same shop......for comparisons sake and everyone can see that we are running less boost and have way better AFR's then your "kit". And also your mixture is extremely lean under boost in some spots and then way too rich in other spots.There is only one spot that has the correct mixture at that is 11.5 to 1 AFR at 7.5 psi of boost!!!! LOL!
End Quote:
I think you miss-typed when you said you wanted to prove that you run less boost than we do.
We don't agree on most things, including A/F ratio. I don't believe in your 11.5 number. I think for a normally aspirated smart, 16.5 (as chosen by the factory) is fine. I think as you add boost, you need to add fuel. Generally, with the smart:
5 PSI - 14.5
6 PSI - 14.0
7 PSI - 13.5
8 PSI - 13.0
9 PSI - 12.5
10 PSI - 12.0
12 PSI - 11.5
The Split Second controller for my 4th injector maps Boost against RPM. This allows me to control A/F based on boost pressure.
The table I posted does show too rich and too lean. However, the table was recorded as a base map before I tuned on the dyno. Things look much better now...
jack
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SMART-Turbochargers.com
Costa Mesa, California USA 92627
+1 949 350 6952
info@SMART-Turbochargers.com
Quote:
Originally Posted by SpeedForceRacing
I will go get the same type of readout from the exact same dyno,done by the same shop......for comparisons sake and everyone can see that we are running less boost and have way better AFR's then your "kit". And also your mixture is extremely lean under boost in some spots and then way too rich in other spots.There is only one spot that has the correct mixture at that is 11.5 to 1 AFR at 7.5 psi of boost!!!! LOL!
End Quote:
I think you miss-typed when you said you wanted to prove that you run less boost than we do.
We don't agree on most things, including A/F ratio. I don't believe in your 11.5 number. I think for a normally aspirated smart, 16.5 (as chosen by the factory) is fine. I think as you add boost, you need to add fuel. Generally, with the smart:
5 PSI - 14.5
6 PSI - 14.0
7 PSI - 13.5
8 PSI - 13.0
9 PSI - 12.5
10 PSI - 12.0
12 PSI - 11.5
The Split Second controller for my 4th injector maps Boost against RPM. This allows me to control A/F based on boost pressure.
The table I posted does show too rich and too lean. However, the table was recorded as a base map before I tuned on the dyno. Things look much better now...
jack
__________________
SMART-Turbochargers.com
Costa Mesa, California USA 92627
+1 949 350 6952
info@SMART-Turbochargers.com
Last edited by TurboTim; May 17, 2010 at 06:42 PM.
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From: San Diego
Hmm...14.5 for any setup is a little too high for NA. Given all the stress from the components, or lack thereof, that car is a ticking time bomb. Is the car tuned daily for weather variability?
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