so I am going tvs and I know on E85 with 2.9 pulley on the tvs is pushing the limit of the injectors so I was just thinking about if I went back to gas I could drop the pulley (Thinking 2.8 or 2.7) but was just wondering if the pulley drop would be better than the gains from the E85.

 

what size injectors

 

Mod list says 80's. I am running a 2.8 on 80's and E85

 

wicked your one crazy **** lol whats your idc? I was going to drop to a 2.9 or 2.8 on 80s and E85 but everyones says go rsfs if you drop lower then a 2.9

 

I ran e85 on a 2.7 and my idc's were maxing out at 6grand with a 11.5 air to fuel ratio. In my personal opinion from what I have seen on the TVS cars and e85, I would put money on it that a 2.8/2.9 car on e85 would beat a 2.7 car on 91/93. So to answer your question yes e85 is worth it, even if you have to stick with a larger pulley.

 

I am going to do a little test here if you where maxed on a 2.7 with a/f or 11.5 I am going to throw a 2.8 on and run my a/f at 11.7 -11.8 on e and see what my injectors look like.

 

So am I completely safe on 2.9 but possibly on 2.8? thanks for the help guys

 

Yes, yes I am. I also ran a 2.6 on the m62 w/ just 60's and a catback. Stock header, stock dp, stock cooling system. 13.2@108.

 

whats ur idc with the 2.8 and e85?

 

what would u guys say is better as for getting the most timing out of the car meth or E85

 

well before you look at timing lets look at safety meth you have to always fill when you run short and if you run out during a wot you screw your self over. e85 is always there you always have good timing. Also i would say you have to run a 25/75 mix to get the octane e85 has.

 

so u would say about the same expect for the danger side of running out and blowing the motor

 

You have to try really hard or be doing something wrong to get E85 to knock, and you just put it in your tank so its fool proof. I have ran both and E85 is here to stay in my car!

 

Did you say AFR of 11.5/1 with e85, and you call yourself a tuner?

Agreed, e85=gods fuel!

 

E85 is worth it is you have the stations around to support you driving it.

I would change to E85 in a heartbeat if it wasn't for the fact I can count the number of E85 stations in Western PA on one hand.

 

Did you know that that IS the correct afr. In lambda, 11.3 afr when set at stoich being gasoline 14.7 is where I run my E85? Of course, when my wb is outputting the lambda signal as stoich being 9.8 (E85's stoich) then it reads 7.4afr. Which is a little rich at the moment. 11.5 gasoline = 0.77 lambda = 7.5 e85

Maybe you should learn a little yourself. MOST widebands are set up for lambda and gasoline output only. So you have no choice BUT to go off of the gasoline afrs and lambda. Luckily I have an autometer cobalt series wb that I can make my lambda whatever I want. 1.0 is 1.0 is 1.0 regardless if you run methanol, e85, or gasoline. 1.0 lambda is 1.0. Now, 1.0 lambda =9.8 afr for E85 and 1.0 lambda = 14.7 for gasoline.

Normally, I don't get involved when zach mentions ****. But this time, he is right

Check your own knowledge

108%. It maintains my afr just fine, does not lean out up top. Keep an eye on your pulse widths

 

 

You are right, I should have just posted this instead

 

I am not sure if you ran 100% meth with premium fuel if the overall octane level would reach E85s octane of 105-108.

Meth injection is a mist of alcohol. Fuel injectors are spraying a lot more fuel then the meth nozzle.

E85 ftw.

How is the TVS treating you? I am waiting to see the results on a dyno.

So what is stopping you? lol jk

 

This is out there but with your current mods or whats listed in your sig.. what did you do power wise with it?

 

Blackbaltsw This is what I was trying to tell you over on the Hpt forums.

 

I always referred people to this post.
https://www.cobaltss.net/forums/show...=202346&page=2

TLR - the target lambdas for e85 and pump gas are the same, which means that while your car is actually fueling 9.8, your wideband gauge is reporting 14.7.

I'd like to try e85 sometime but I don't think Austin has it anywhere, so I haven't had the opportunity to dick with it. I'm curious what all needs to change in the tune to compensate.

 

All im all saying that your running a 11.0 afr on e85 is ******* RETARDED. Your NOT and if you are your **** is seriously messed up. I know all about the gasoline 14.7 = 1/1 lambda. But putting e85 in equivalence to gasoline is retarded. Switch the wideband to read Lambda, problem solved. People need to stop posting that 11.5 is a good afr for e85. ******* dumbasses.

Hey man, from what ive read on hptforum of yours, you dont even change the stoich value. hacking the maf scale is the most half ass way to do it.

 

Did you even read our posts?


The whole point Zach and Wicked were making is that even though your car will be running 9.8 AFR, a gasoline wideband will still report it as 14.7. It's not actually running 14.7, that's just the number the wideband is reporting back because of the way the math works out.

If I had e85 the wideband will say I'm running 11.5 AFR, but I'm really running 7.67. Thus, 11.5 on a gasoline wideband is a good AFR for both gasoline and e85.

 

I understand that 10000%, my only peeve about that is why state an incorrect number? Why not just say lambda? Its all to easy to switch a wideband to read lambda.