Relocation of MAFS on Turbo Applications
08-20-2007, 11:31 AM
#51
Wait the higher the BSFC goes up, the lower the HP drops....
Now I am confused.... BSFC refers to loss of engine eff. due to inertial resistance/ heat lost to engine on exhaust/ heat absorbed on intake right?
Now I am confused.... BSFC refers to loss of engine eff. due to inertial resistance/ heat lost to engine on exhaust/ heat absorbed on intake right?
Last edited by Kane; 08-20-2007 at 11:42 AM.
Most excellent.....
08-20-2007, 08:05 PM
#60
No. BSFC and VE are independent.
There is no good median VE, especially on an engine with a wide RPM range and power band.
The Renesis goes from 35% to over 100% in its OE form, so its hard to say it is an average or 67%!
BSFC is a fairly constant number since it only applies at WOT and peak torque.
There is no good median VE, especially on an engine with a wide RPM range and power band.
The Renesis goes from 35% to over 100% in its OE form, so its hard to say it is an average or 67%!
BSFC is a fairly constant number since it only applies at WOT and peak torque.
08-29-2007, 10:25 PM
#62
Apexing at Oak Tree
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This is great stuff here. I'm actually now running into an issue with the MAFS sensor on my turbo install. The ECU is throwing a CEL which is "high voltage MAFS" code. Apparently the MAFS is reporting higher than the 5 volts its supposed to. Is it possible for this MAFS to be overrun at 4-5 psi or lower? Or is it more plausable the MAFS is broken. We had to clean it prior to this because this because the car would not even run. After cleaning it we get this code. Any ideas?
08-30-2007, 08:16 AM
#63
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Thanks Charles. I don't have the specific code number but my installer pulled it with his scantool and it read as high MAFS voltage. The car also goes into limp mode after a certain RPM (around 4k i believe).
I did some research and most say this MAFS should be good up to around 500 hp, but I also found there was a recall/TSB for the MAFS in 04 rx-8s for premature failure.
I did some research and most say this MAFS should be good up to around 500 hp, but I also found there was a recall/TSB for the MAFS in 04 rx-8s for premature failure.
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