E85 Blend
Thread Starter
Senior Member
Joined: 07-08-09
Posts: 1,592
Likes: 0
From: Chandler, Az
E85 Blend
I've had my flame suit ready for DAYS on this one. Have been thinking about it for a while, and after reading ALOT on CSS.net, and a few other forums I decided to try it.
I have a 2.2 l61/m62 powered sunfire. I am running the 3.0 pulley, the GM reflash designed for the car (meant to be run with stock pulley), and the 36lbs injectors that came with the GMPP kit, with a cobra heat exchanger and properly functioning cobra pump, with the stock endplate. Heat is not a problem here, and neither is AFR, the only thing that you guys wont like is the injector duty cycle. But either way, even with the IDC over 85% the car still runs in the good AFR range.
If I roll into the throttle all the way to red line no matter the gear, no knock. If I stand on it from say a 60 roll in 5th, 6-8* knock. If I stand on it after a 5th-4th downshift, straigth to 8* knock. Then the normal .5* drop off every half second or so. All of this while AFR's are still between 11.4 and 12.2, so perfectly safe!
100 octane is currently 8 bucks a gallon out here in Arizona right now, so that makes for an expensive octane booster, and I HATE putting the bottle octane booster in my car. So I have been reading that E85 is around 105-108 octane, and that anything up to a 20% blend would not harm the system in anyway. And its only 3.12 a gallon. Considering Maricopa County already runs a 10% blend anyways. So I decided to try it. I didn't do it with a full tank. I pumped in 1 gallon of E85 and 4ish gallons of normal 91 octane. Which according to the calculators I found only should have yeilded me E17. Took the 'Fire for a spin, and guess what. From a 60 roll in 5th, NO KNOCK. From a 5th -4th downshift, knock is only spiking to 4*. Top end seems to be a peppier, and AFR's are staying between 11.4 and 12.2 under acceleration and WOT.
Now I know this is not a "solution" to my problem, and that I need a proper tune, and that will get rid of the knock, But for know it is the cheapest temp solution, and I don't see any long term effects rising from it. I don't think a 7% bump in ethonal will hurt my fuel system.
I have a 2.2 l61/m62 powered sunfire. I am running the 3.0 pulley, the GM reflash designed for the car (meant to be run with stock pulley), and the 36lbs injectors that came with the GMPP kit, with a cobra heat exchanger and properly functioning cobra pump, with the stock endplate. Heat is not a problem here, and neither is AFR, the only thing that you guys wont like is the injector duty cycle. But either way, even with the IDC over 85% the car still runs in the good AFR range.
If I roll into the throttle all the way to red line no matter the gear, no knock. If I stand on it from say a 60 roll in 5th, 6-8* knock. If I stand on it after a 5th-4th downshift, straigth to 8* knock. Then the normal .5* drop off every half second or so. All of this while AFR's are still between 11.4 and 12.2, so perfectly safe!
100 octane is currently 8 bucks a gallon out here in Arizona right now, so that makes for an expensive octane booster, and I HATE putting the bottle octane booster in my car. So I have been reading that E85 is around 105-108 octane, and that anything up to a 20% blend would not harm the system in anyway. And its only 3.12 a gallon. Considering Maricopa County already runs a 10% blend anyways. So I decided to try it. I didn't do it with a full tank. I pumped in 1 gallon of E85 and 4ish gallons of normal 91 octane. Which according to the calculators I found only should have yeilded me E17. Took the 'Fire for a spin, and guess what. From a 60 roll in 5th, NO KNOCK. From a 5th -4th downshift, knock is only spiking to 4*. Top end seems to be a peppier, and AFR's are staying between 11.4 and 12.2 under acceleration and WOT.
Now I know this is not a "solution" to my problem, and that I need a proper tune, and that will get rid of the knock, But for know it is the cheapest temp solution, and I don't see any long term effects rising from it. I don't think a 7% bump in ethonal will hurt my fuel system.
Thread
Thread Starter
Forum
Replies
Last Post
Macgyver2484
Parts
2
Sep 2, 2015 05:44 PM