E85/meth combo

lan_evo_mr9 · Jul 6, 2009, 08:01 PM

What would be the downsides/upsides to a combo like this? Good idea or terrible idea?

twabtoxer · Jul 6, 2009, 08:12 PM

i had a buddy who did this . if i remember correctly with the 9 turbo at 30psi he got 380whp im not sure tq on the mustang dyno, with the mix . im not sure he had any downside thou.

AmF_15 · Jul 6, 2009, 08:15 PM

Well the only downside I could see is that your turbo loses its efficiency, correct me if im wrong like at 28psi or so.

mrfred · Jul 7, 2009, 08:44 PM

Quote:

Originally Posted by lan_evo_mr9

What would be the downsides/upsides to a combo like this? Good idea or terrible idea?

I don't think its a valuable combo. Meth lowers combustion temps and increases knock resistance. E85 does this as well (to the point of being able to run timing right up to MBT), so I don't think meth will provide any substantial gains with E85.

cmj · Jul 8, 2009, 10:44 AM

If you are running out of fuel on your E85 tune meth injection could give you a little more head room.

cornercarver · Jul 8, 2009, 10:57 AM

There is no point in doing this combination.

Tuning with e85 alone, you can advance the ignition timing to the point where it no longer provides any gains. I can't remember what that point is called...

What would be the point of adding w/m?

cornercarver · Jul 8, 2009, 10:58 AM

Quote:

Originally Posted by twabtoxer

i had a buddy who did this . if i remember correctly with the 9 turbo at 30psi he got 380whp im not sure tq on the mustang dyno, with the mix . im not sure he had any downside thou.

Why would your friend need to do this at this power level. Way overkill and provides no extra benefits over e85 alone.

Macaroni · Jul 8, 2009, 11:19 AM

Quote:

Originally Posted by cornercarver

There is no point in doing this combination.

Tuning with e85 alone, you can advance the ignition timing to the point where it no longer provides any gains. I can't remember what that point is called...

It's called MBT like mentioned above. I don't see any point in doing it either.

94AWDcoupe · Jul 8, 2009, 11:26 AM

It a good idea. You can remove intercooler to save weight. 16g will hold 30psi at redline without it.

cornercarver · Jul 8, 2009, 03:08 PM

Quote:

Originally Posted by 94AWDcoupe

It a good idea. You can remove intercooler to save weight. 16g will hold 30psi at redline without it.

It is not that serious to remove that amount of weight to have a tune strictly reliant on liquid intercooling. You're screwed if you run out of w/m on a street driven car.

lan_evo_mr9 · Jul 9, 2009, 01:32 PM

Really the only reason I was wondering, was not for power so much, but more for the "cooling effect" of meth. After seeing what I've been able to do with my car on E85, I guess there really isn't a point. I was thinking of the theory of running cold fuel and cold "air" and how it would react.

TTP Engineering · Jul 11, 2009, 09:36 PM

Quote:

Originally Posted by 94AWDcoupe

It a good idea. You can remove intercooler to save weight. 16g will hold 30psi at redline without it.

I'm afraid some of us are too ahead of the curve for others to accept the crazy ideas of today which become the norm of tommorrow.

spdracr · Jul 11, 2009, 10:03 PM

i've thought of this many times probably gonna try it too haha

TxEvo8 · Jul 14, 2009, 04:03 PM

Quote:

Originally Posted by TTP Engineering

I'm afraid some of us are too ahead of the curve for others to accept the crazy ideas of today which become the norm of tommorrow.

+1, great idea!

Early EVO · Jul 14, 2009, 04:18 PM

Wow. What TWA was referring to was my car. An 04 RS with a IX turbo, cams, studs, BR race core, lower pipe, full 3 inch. Homeamade intake. Pump, PTE1000's, and an old SMC kit.
Car was running on 100 unleaded, had maps for meth and without. When I switched to E85 it didn't gain a whole lot over the 100. I made two maps for it. Really not much difference in power. Think uncorrected it was 384 on E85 and with meth 387. More than anything the meth would help when its 115 out here with cooling the intake. Even in normal weather its cooling effect can be seen in on the dyno.
I never considered removing the intercooler? Did a lot of testing with timing and yes at MBT the timing is almost identical with e85 versus E85/meth. I run it a little leaner with the meth than the E85 by itself. Not an everyday car nor a tune I would put on anyones car but my own.
One side benefit with the meth is if I put on a red or similar bolt on turbo. Won't necessarily need a double pump setup. Currently has a lot of room to work with fuelwise on its current map. Could go from 390's its at now corrected up to 450-470 on a red on the current fuelsetup. Most likely then it will be out of fuel.