So i have been looking to jump on the "e wagon" with my balt, but i have questions that i have not really found answers to. I have read ebristol's threads and others on e85 and have seen good results so i am thinking its time to do it.

my mods right now are gm stage 2, option b, dual pass, smoothflow 2.9 pulley, stock air box filter mod, fuel pump rewire, zzp phenolic intake spacer, badmab shorty header, zzp 2.5 catless down pipe bolted to stock exhaust, hptuners pro, and lc-1 wideband.

future mods to be decided, bigger heat exchanger, larger injectors 60's/80's(i am looking at 80's for growth), smaller pulley 2.8/2.7, and clutch.

1. what do most people find to be the sweet spot for hp, mpg, and engine life, straight e85 or e47 blend?
I have e85 pump and 93e10 nearby so I can blend 1:1.

2. should i upgrade to a better fuel pump if i run 80's on e85/e47 blend?
have 28k on my stock pump.

that's it for now if I think of any other questions(that i don't find on my own) i will ask.

thanks for your time

-Joe

 

Yes upgrade your fuel pump and get some 80's. If you read up you will see that people are making about the same power with an e47 blend as they are with an e85 full tune. I run an e47 blend, but will run 93 in the winter, just because e85 fluctuates in the winter here in Illinois

 

Fuel pump doesn't need to be touched. Just bigger injectors and tune for the basic mods you have.

 

It's known to go out, I'm a person who takes precaution haha. But yes you don't need to change it

 

05 pumps are known to go out. 06 and 07 pumps are fine

 

you dont have to upgrade your fuel pump i still have stock pump in my car lol...never got around to puttin in my new one lol

 

whats the e47 blend mean? i have 1 station near me with e-85...

 

e47 is a mix of pump and e85

 

e47 is a 1:1 of e85 and 93

 

yeah i have read the 05 pumps are weak, but just wanted to make sure.

 

i run 80s injectors and 2.7 pulley on e85, it runs great. just shy of 300 whp. on stock pump by the way have have ran this setup for more than a year through winter and everything, and haven't had one problem.

 

cool i thought it was a mix just wasn't sure... whats the point of doing a 1:1 mix vs full e? is there a chance of detonation doing full e or something

 

Better fuel economy with all the power of E85.

On average I get 19mpg with E85. But that is will a mix of city and country. On the highway, I get 22-23mg if I ***** foot it.

 

im a 2007 ss sc on e85 with a 2.8 and 60# and nos...with a idc of 95% @ 7500 rpm
my car idles better than stock with the a/c on or off.

 

and my cold starts are almost normal..a lil sputtered for a split second and then it idle perfectly fine

 

my cold starts used to suck...once in awhile it took a 2 turns of the key to start..but before i left it was actually really good..started right up and idled fine

 

what pulley and injectors do you have?

 

I am running a TVS with a 2.7" pulley, 80# injectors with an OTTP RSFS with the base pressure set at 50 psi.

The RSFS allows me to lower the fuel pressure for more precise fueling under light loads.

80s Idle - YouTube

The secret to getting better fuel economy with E85 is to add timing in the timing table where the car cruises.

 

oh okay, i have 2.7 and 80s on m62 and i get like 17-18 in city. not quite sure on highway.
also on e85

 

https://www.youtube.com/watch?v=dMiZ...e_gdata_player

 

25mpg highway with a 2.6 m62 and id1000's....

 

My car = 80s and 2.8 with e85, my car also = 28mph average, area 47 rules

 

wut is ur mod list that ur running 1000's with the m62 if u dont mind me asking

 

cars like the lnf run through fuel cut on high rpms if they just use E85 only. which is why they mix it

 

i get like 17-18mpg in the city, 22 highway if i baby it. thats not off the DIC, just calculating off of fill ups