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timing with e85

Old 01-25-09, 02:34 AM
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timing with e85

how much more timing r u guys running on e85 than gas lets say up between 15-25psi,

also compared to race gas like c16 do u run same or less timing

thnx
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Old 01-29-09, 09:13 AM
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21 psi 12 degrees. was only testing.
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Old 01-29-09, 09:54 AM
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I am also interested in this....

My engine is high compression(10:1) and I am running around 20psi of boost on e85 too.

Thanks.

Chris
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Old 01-29-09, 09:06 PM
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we r running 15* @ 20 psi,

will try some more next time
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Old 02-03-09, 05:14 PM
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Oh I see. I am running about 8Deg advance at 20psi across the board with a split of 8 falling to 6 towards the top end.

My engine is high compression though(10:1).

Thanks for the info....anyone else?

Chris
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Old 08-30-09, 10:08 PM
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Brought the thread back from the dead.
Dynoing my car most likely on Wed.
Right now running .76 - .78 lambada(11.3-11.5 gas AFR)
25psi boost falling to 23psi above 7k (out of turbo)
12* 0 split at 25psi
13.5* 0 split at 23psi
15* 0 split at 20psi
EGT's are 1450-1500f steady

Should I bother to tune leaner or add more timing? Or am I pressing my luck as is.

I have an hour avail on the dyno this session.
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Old 09-02-09, 06:36 PM
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Originally Posted by IronMdnX View Post
Brought the thread back from the dead.
Dynoing my car most likely on Wed.
Right now running .76 - .78 lambada(11.3-11.5 gas AFR)
25psi boost falling to 23psi above 7k (out of turbo)
12* 0 split at 25psi
13.5* 0 split at 23psi
15* 0 split at 20psi
EGT's are 1450-1500f steady

Should I bother to tune leaner or add more timing? Or am I pressing my luck as is.

I have an hour avail on the dyno this session.
How's your knock logs look like? Hell, if they're good... raise the boost a bit* (~27psi)
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Old 09-02-09, 06:56 PM
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Originally Posted by IronMdnX View Post
Brought the thread back from the dead.
Dynoing my car most likely on Wed.
Right now running .76 - .78 lambada(11.3-11.5 gas AFR)
25psi boost falling to 23psi above 7k (out of turbo)
12* 0 split at 25psi
13.5* 0 split at 23psi
15* 0 split at 20psi
EGT's are 1450-1500f steady

Should I bother to tune leaner or add more timing? Or am I pressing my luck as is.

I have an hour avail on the dyno this session.
Any updates?
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Old 09-14-09, 03:16 AM
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would like to know how the timing advance compares to c16.

and how much cooler your engine temps are with E85.
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Old 09-20-09, 03:52 PM
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is e85 decent to run on a n/a. Or am I being crazy?
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Old 09-20-09, 06:09 PM
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with e85. I generally run 2-3 degrees more timing then normal pump fuel.

On e85 you can run around 5-6 degree advance at around 30psi no worries with a 8 degree split.

Around 35psi run around 3-4 degree advance with 8 degree split.

Once you start getting close to 40psi start to get some knock with even 0 degrees advance.(you can use water to get rid of the knock, we have done that on a customer car).

25psi run around 9 degrees advance with 8 degree split

20psi run around 11 degrees advance with 8 degree split.


Just remember guys. If the engine is built right, it will not a huge amount of advance to make bulk power. Only engines with crappy porting will need lots of timing to make ok power.
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Old 09-21-09, 07:28 PM
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THANKS 72c,, good info, YUP,, somethin to think about !!
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Old 09-05-10, 10:32 AM
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I made this little chart for my E6K.
Attached Thumbnails timing with e85-e85-timing.jpg  
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Old 09-05-10, 01:05 PM
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Originally Posted by RXTASY57 View Post
I made this little chart for my E6K.
Is this on a 13b or 20b and is it ported
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Old 09-05-10, 01:13 PM
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13B halfbridge
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Old 09-05-10, 01:28 PM
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Originally Posted by RXTASY57 View Post
I made this little chart for my E6K.
Originally Posted by RXTASY57 View Post
13B halfbridge
Do you think the timing would change alot more, if it was pure methanol?
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Old 09-06-10, 09:44 AM
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Originally Posted by Erdin View Post
Do you think the timing would change alot more, if it was pure methanol?
I would think you could add much more timing with pure meth. Takes a lot to get that stuff to detonate.
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