KLLRVET

I am really considering either converting the E85, or doing NA meth injection. Both have appeal as timing can be increased and detonation can be minimized.

I'm concerned about e85, as I really don't put many miles on my car. I fear it will clog injectors etc from sitting.

The meth has appeal because spraying pre throttle body will allow for cooling of the intake charge. That cooling will shrink air molecules (like nitrous), and allow a more densely filled combustion chamber (I don't think e85 can do that because it is sprayed so close to the combustion chamber and only at certain intervals (injector timing vs constant). The meth will also help with buffering detonation.

The drawback is that if the meth doesn't spray, there could be engine damage due to detonation etc, as well as an aux fuel system that could leak and such so there is an increase fire hazard.

So I see it like this:

E85
Pro:
self contained in original fuel system so no more fire hazard than stock
detonation is buffered so more timing
As long as there is fuel in the tank, there is no danger of running without

Cons:
Fuel system problems from sitting

Meth:
Decreased IAT's so more dense intake charge
detonation is buffered so more timing

Cons:
external fuel system has leak potential and increased fire hazard
clogged nozzle, fuse failure, pump problem etc could lead to engine damage if not noticed until there is a problem

Anyone have any input on this?

Thanks

Tony

Turbo2L

E85 is leaps and bounds more capable that meth injection and easier on the end user as well.

Get you tune setup for flex fuel and run a tank of 93 through the system before you let it sit up. This will take care of the gumming issues.

I wish I had E85 locally here.

#1hand

Love my meth on my bolt- on Z !! works great! stock motor, cam and heads just bolt-on's 10.09 @ 137

Twistedpixels

Flex fuel tuning is totally disabled in vettes and even with HPtuner vcm you cant get around it. the only thing you can do is increase your High octane tables but if you ever have to run with normal fuel you better not get on the gas hard as it will have to see knock to transfer to the low octane tables and a lot of it. Anyone who tells you they can enable flex fuel tuning for a vette is lying. Yes it is in the VCM suite software but you cant do anything with it. You tune for what you are going to run and that is that. No one can put some magic "calibration" in the tune to recognize that it is running E85 or standard fuel and be able to switch between two totally different tunes. You can only store one tune in the vette ECM. So you run E85, then you better have access to it all the time wherever you go or you have to drive it like carefully on standard pump gas. I am getting my info from someone that has been a HPtuner since the start and knows the software intimately. He has seen many other tuners claim they do a dual style tune for Flex Fuel and is plain bad marketing and misleading.

gearbox

Matters how close e85 is to you. Mine is about 25 miles away. So I chose meth.

Chance42

Pretty sure that Dsteck makes a flex fuel sensor to accomplish this, which will recognize any blend from straight 93 with 0% ethanol to e85 or what have you. After the initial tune, it will adjust for whatever is in the tank.

The ECM has the parameters, but no sensor to read levels from. That's my understanding anyways.

Corvettinator

I think you might find this thread informative:

CMS explains a Flex Fuel conversion and tune(s)

Chance575

If you use a water/meth setup it would be nonflamable.

DSteck

This post is 100% incorrect. Your tuner is also clearly ignorant to the latest and greatest capabilities of the Gen IV and beyond ECMs.

Coach62

Where in the cape is there E85? keep in mind that if you track the car you WILL have to refuel and there's no ethanol there.

KLLRVET

E85 is in Ft myers.

I am well aware of the need to refill, that is why meth has a bit more appeal

Turbo2L

Boom.

devojrx7

How much does this sensor cost and where is it installed?

Neumonic2002

Dsteck is one of the most cutting edge LS tuners in the industry, I have seen his work with too many cars to count. People could certainly learn something from talking with him instead posting stupidity referring to HP Tuners capabilities they are unaware of...

#1hand

100% meth! Water puts the fire out!

Unreal

Both.

They both have advantages. One issue with e85 only is you still get high IATs which lead to pulling timing unless you just nerf the IAT table to not yank timing when hot because of the e85, but if you run flex fuel/pump then you have to worry about that when you aren't on e85.

As for meth pump/nozzle/etc clogging/failing, that is a risk for anything on the car. For some reason people really focus on that with meth, but if a fuel pump, injector, oil pump, etc etc fail, you are in the same boat. **** can fail and take out a motor. Yes it is added parts, but there are plenty of safe ways to set it up.

Honestly I run 91/meth. Car makes 1000+ on 91/meth and would make 1000+ on e85/meth. I can fill up anywhere, good mileage, and I am blower/tire limited so e85 doesn't appeal to me. Now if I could gain 100+ hp out of it, maybe but for now I'll just stick to 91/meth.

0Myhardtop

Yep, I'm with you my friend.

When I read that I was floored.

The things some of these so called tuners tell their customers baffles me...but oh well

Thanks,
Carlos

RamAir972003

I need to talk to u I'm going the same route getting meth kit for my heads and cam can pm ur number need to ask you a couple of questions' about yours if you don't mind...but back on topic I would do meth kit...

Coach62

Yes, unless you have a readily available supply of E85 I wouldn't. The only E85 I've seen up your way is east of I-75.

Fifedogg

Ryne @ CMS will be doing my car in about 3 weeks and adding the flex fuel kit made by DSteck. It will run anything 91 to E85 and everything in between. I plan on posting results of dyno runs on 91 and pure E85 if anyone is interested in how well it works..