Running E85 on FAST classic?

syclone 0260n4

New member
So I just picked up my first Syclone in 5 years and a bit rusty to tuning and all the new stand alone's out there. The truck was tuned for Sunoco 110 from way back then had a random tune thrown on it for 93 for road use. It runs super rich right now and definitely well below its potential. I can get E85 locally and would like to set the truck up to run on it for the obvious but I'm not sure if the old FAST system will support it. Not trying set records or run on the dangerous side but would like crank it up to the safer side of its potential. Was thinking converting to XFI but curious if there's a better way to do it. Any input would be greatly appreciated. I have a pretty good idea but I'm just itching to know what it could run when tuned right

Build:
5.0 stroker
Bow tie block o-ring'd
Billet crank
Carillo H beam rods
8.5:1 dome top pistons
Custom cam
Vortec big valve heads/ roller rockers
Ported upper/lower
ATR headers
86lb injectors
Aeromotive A1000 fuel system
FAST classic
Dual core A2A
Turbo is supposed to be a 76mm but I'll need to double check

Also:
HD axle shafts
Aluminum drive shaft
HD prop shaft
Built 700R4 (soon to be 4L80)
Art Car 10" adjustable lockup converter
Aluminum radiator
Billet rails
Coil overs
Tube arms
Bell tech sway bars
4 wheel Baer brakes
9 and 11/17" ZR-1's
 
Last edited:

Sean Krupa

Moderator
Re: Running E85 on FAST classic?

Not sure what Size Fuel pump or Lines you're running. I suggest atleast 120lbers as I'm maxing my 80s on a similar build to you. Running E85 is just a matter or adding 20-30% more Fuel to your Fuel Table. E85 runs leaner so you have to compensate. Not really a big deal running Corn on any system as I run a Stock ECM on Code59. Will be switching to the Holley Dominator this winter. Add Fuel and and you safely add more Timing. Basically it.
 

RealFastV6

@jb_and_his_coffee
No reason you can't run E85 on it, you'll just have to use the gas a:f ratios and do the math yourself on the conversion because Classic fast doesn't have bsfc calculations or alternate check boxes for e85, etc like the XFi does.

Sounds like an awesome build btw. Where'd it come from?


Sent from my iPhone using Tapatalk.
 

syclone 0260n4

New member
Re: Running E85 on FAST classic?

Cool and thanks guys that clears a few things up. This is pittman's old truck. I actually got it from the original who got it back after a long time. The 2 owners before him (Pittman and his brother) had done everything but there are a few things like the turbo, Trans build, fuel pump etc that nobody is sure of. Pittman was telling me it'd been thru 10 transmissions and 5 or so turbos. Waiting on documents but I've been trying to clear up exactly what's been done so I know where to start. He read off an 11.86 @ 82mph time slip said 3 gear kept going out. I can only imagine what it could have done had trans held.
 
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