E85 Results

[chad05gt]

First a little background. Motor has forged rods and pistons, 9.5 cr, FRPP 62mm tb, PMAS HPX maf, 80 lb injectors, GT500 fuel pumps, and Comp 127300 cams. Supercharged by a Whipple 2.3 with a 3.5" pulley and Innovators West 10% od balancer.

The baseline comparison is 531/460 rwhp/tq. on 92 pump gas with this pulley. I had originally planned to use a 3.250 pulley that made 553/492 on pump gas but ran out of fuel pump at about 5700 rpms.

The final tune has 21 degrees of timing. I called it quits at this point because the motor is making more hp than I had ever planned for and even with my crappy driving should put me into rollcage territory. My previous best of 11.68 was with the motor making 515.

Here's the end result. We could only pull to 6400 due to fueling. 575/505. This is a gain of 44/45 hp/tq.

Will you post numbers after upgrade fuel pumps/inj.?

 

[lito]

Nice gains. I'm thinking about E85 after I get everything else done that I have to now like a roll bar, built rear and whatnot. I'd probably look into just buying a barrel of it since the closest station that carries it to me is about 35-40 minutes away.

I thought with E85 you could run more timing than that since it roughly equates to something like 104 octane. I know when I run the 110 leaded fuel, Lito set my tune to run 22-23 degrees of timing.

EDIT: Didn't notice on the end of your post that you were 21 degrees of timing, my bad.

E85 at the end is pump fuel, so one should tune for that with some care and even when is thought as a cheap race fuel for many it is not a race fuel per se, quality control is not as stringent as a VP, Sunoco or other brand of race fuel.

 

[hamish]

Great job Bruce.
You and John have sure made one sexy dyno sheet.
Good luck at the track.

 

[Germeezy3]

Good gains Bruce. It will be interesting to see what your car will run now. Do you have any plans to raise the boost higher?

I tried to make it to the dyno Friday. I was rear-ended by a Peterbuilt at the I-5 to SR18 on ramp on the way there. The 07 GT500 I just bought was totaled and I was air lifted from the wreck. Just got out of the hopital today.

I am sorry to hear that and hope you are okay my nephew was recently airlifted to Harbor View after an accident and he just came home. How are you feeling?

E85 at the end is pump fuel, so one should tune for that with some care and even when is thought as a cheap race fuel for many it is not a race fuel per se, quality control is not as stringent as a VP, Sunoco or other brand of race fuel.

Also Bruce drives the car quite a bit and his goal isn't to push the car and its tune to the ragged edge. There is probably more timing left on the table but knowing him and John they felt 575 rwhp was plenty of power and didn't try to push the tune for more.

 

[BruceH]

Good gains Bruce. It will be interesting to see what your car will run now. Do you have any plans to raise the boost higher?

I tried to make it to the dyno Friday. I was rear-ended by a Peterbuilt at the I-5 to SR18 on ramp on the way there. The 07 GT500 I just bought was totaled and I was air lifted from the wreck. Just got out of the hopital today.

Holy crap Marc! Glad you are on the road to recovery.

DAMN! Thank God you're alive and able to post! Good to hear you're out of the hospital. I bet you're sore as hell about now though!

@OP, What's the timing advance limit for this setup? 21° of timing right now seems like an engine ready to detonate, but I don't know a whole lot about these engines on boost.

With e85 it's fairly mild. I decided to stop there instead of pushing it out further.

Moved to chit chat for further discussion. Congrats on the new numbers, that is a sick beast

Thanks

Bruce - congrats on the gains - enjoy the power


100%

Thanks

Will you post numbers after upgrade fuel pumps/inj.?

The injectors have plenty left in them. I'll put some baps on the pumps at some point in the future but mostly just for insurance. I keep reminding myself that the 4.6 is only 281 cubic inches and this is alot of power for that displacement, (and alot of stress on the drivetrain) especially with car I drive on a regular basis. I think I'm done with power upgrades.

 

[chad05gt]

E85 at the end is pump fuel, so one should tune for that with some care and even when is thought as a cheap race fuel for many it is not a race fuel per se, quality control is not as stringent as a VP, Sunoco or other brand of race fuel.

HUGE point of information. Never thought of it that way...\\

Apprec. the heads up.

VERY Crutial point!!

+1