STX Build + E85 Tune = Which Class?

[ka-t_240]

Originally Posted by APEXIT53

I think the main reason they took e85 out was because some cars stand to make massive amounts of power off of e85 with no mods, like ours. Other cars you have to do new pump, new injectors things like that but aren't legal to do in stx.

That can be true, but then they should ban race gas as well. You can run 100octane fuel in ST*. A number of ST legal cars can run e85 w/o mods, but they also can get near similar results on $10/gal race fuel.

[justint5387]

Every car can run 100 octane, not every car can run E85.

E85 performance > 100 octane

[48Spoons]

Originally Posted by justint5387

Every car can run 100 octane, not every car can run E85.

E85 performance > 100 octane

A. Street and Street Touring® category vehicles will use fuel which is
“Federally approved for use on public highways.” This includes the
pump fuel known as E85, but does not allow racing-type fuels which
are available at service station pumps. Fuels comprised of more than
15% ethanol may only be used when specified by the manufacturer
(e.g., in the owner’s manual for flex-fuel vehicles).

Pretty sure the reading of that disallows 100 octane even if you can get it at the pump.

[whataboutbob]

Originally Posted by smg1138

Given the choice between SM and CSP, I'd rather run in SM. In my region there's a lot more drivers in that class and I've been reasonably competitive with them in raw times. I do realize that running an 86 in SM nationally would be suicide, but regionally it would probably be fun.

I've been killing myself for the last 2 years, lol.

[APEXIT53]

Originally Posted by 48Spoons

Pretty sure the reading of that disallows 100 octane even if you can get it at the pump.

that's funny because I know a lot of people at nationals go to the Harley dealer up the road to get pump gas. they have 95 100 and 110 I think.

[OkieSnuffBox]

Originally Posted by 48Spoons

Pretty sure the reading of that disallows 100 octane even if you can get it at the pump.

Yeah, but bro, reading is really hard.

[48Spoons]

I've heard some people get some 100 to mix it since I've heard 93 is hard to get around lincoln (not sure how true this is).

[justint5387]

The reading basically is saying federally approved fuel less than 15% ethanol is allowed.

100 octane is federally approved. Doesn't declare if 100 octane is racing fuel or not.

[jonesy]

Originally Posted by 48Spoons

I've heard some people get some 100 to mix it since I've heard 93 is hard to get around lincoln (not sure how true this is).

The closest 93 is over 100 miles away (aside from the Harley dealer, which has 95), at least coming from the east.

[Gear_One_Performance]

The Sunoco GT260 is pretty good, but you've got to get the mix fairly accurate every time after the tune to take advantage of it.
http://www.racegas.com/fuelfinder