Thread: E85 fuel FAQ
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Old 08-14-2012, 02:53 AM   #2629
Scooby Specialist
Member#: 198522
Join Date: Dec 2008
Chapter/Region: Tri-State
Location: Up State NY
98 LGT Limited
00 LGT -WRX swap


hey thanks for the reply... not very cold, coldest so far is low 70's high 60's but I noticed when the engine is cold the car will fire briefly and stall. I try to start it agian and it will crank and crank then I give it some throttle and it will start and putter here and there for a minute or 2 and its fine. What does 'ECT' stand for? engine coolant temp? Its an 04 wrx with dw850s injectors. I dont believe he touched the cranking tables. I added 20% from 86 deg and down since I have been having trouble with temps as high as that. Am going to flash tomorrow and give the 20% a try. Hot start is perfect though. Now I have been reading that people are also modifying the tip in and warm up this necessary?

Originally Posted by WRXt4cy View Post
Yeah, you'd want to adjust all tables.

What size injectors did you put in? Did the guy that made your current tune scale these cranking tables down already or not? Normally you would reduce the cranking PW for bigger injectors running on gas by the value of old scaling / new scaling. For E85 you want to raise the PW back up quite a bit for lower ECTs and keep them down for higher ECTs (for hot starts).

As an example 1000s usually like about 20% more than stock PW for 68* and down, 10% around 86* and 30% less for higher ECTs.

If you think its too rich then try lowering it but usually E85 needs to be sprayed pretty rich for cold starts.

How cold is it where you are?
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