max octane for stock engine?
08-22-2011, 11:30 PM
#21
Registered User
08-23-2011, 06:30 AM
#22
Thread Starter
can't do more mods without going up in class its already on the low end power/weight wise in ttc i would need 240 whp!
to max out ttb would be 260+ wheel @ 2850lbs with boltons no stroker no way
to max out ttb would be 260+ wheel @ 2850lbs with boltons no stroker no way
09-01-2011, 06:20 AM
#23
ok so car is back it was mapped for a 50/50 mix of 93 octane and VP Racing 110 which is 107 octane.It ended up at 222HP (dyno dynamics), previously on another dyno dynamics on 93 on it made the same 222HP!But that same map with93/110 mix made 208HP for the first run on this new dyno.So the original tune for 93: (stock ecu vs aem):[attachment=7562:dyno-small.jpg]The baseline with 93/107 mix:[attachment=7560:carter-dyno1 (Large).jpg]final tuned with 93/107 mix:[attachment=7561:carter-dyno2 (Large).jpg]I'm not realy sure why the baseline looks so whacked compared to the original pump gas tune?Would the higher octane make it run rich? its very hot and humid here atm..The tuner said he added a lot of timing, driving it around the car feels good, it seems very smooth in low rpms' and doesn't backfire and burble on the overrun like it used to
09-01-2011, 08:46 AM
#24
Thread Starter
its called 110 octane but the octane rating is 107 so mixed with 93 that should make 100 Octane I think
I got a wideband so I should be able to tell if I mixed the fuel wrong before the car blows up!
I got a wideband so I should be able to tell if I mixed the fuel wrong before the car blows up!
09-20-2011, 08:20 AM
#25
So, sort of a newbie question here.
Do our ECU's automatically advance timing with higher octaine fuel?
At Buttonwillow I have the option of 100 octane unleaded, over our usual pump of 91 here in CA. It's only about $7 a gallon (Willow Springs in $19gal!).
So, will my engine advance the timing and will I gain any hp using it just at the track? Only other mods are AEM V2 and Shunk2 exhaust.
Do our ECU's automatically advance timing with higher octaine fuel?
At Buttonwillow I have the option of 100 octane unleaded, over our usual pump of 91 here in CA. It's only about $7 a gallon (Willow Springs in $19gal!).
So, will my engine advance the timing and will I gain any hp using it just at the track? Only other mods are AEM V2 and Shunk2 exhaust.
09-20-2011, 03:50 PM
#26
Registered User
No they won't. The ECU's maps are made for the octane they would see. Then the ECU will advance/retard for changes in intake temp, ECT ect.
EDIT Actually, would the STFT/LTFT values adjust enough for it?
EDIT Actually, would the STFT/LTFT values adjust enough for it?
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