Charlie Moua

iTrader: (3)

yes, I have search but did not find anything factual that applies to my question



I have EF HB, B18c1, skunk2 IM, stock header, RSR 60mm exhaust, P72 crome.
I dynoed her just to get baseline (no tune) & she put down a healthy 160whp.


My EF is my summer hobby car. I only put about 4,000 miles on her during the summer.
I don't care about gas milage that much since this is not my daily driven car.
and if I go E85 it will be tuned by a local shop

I plan on boosting her later on, but next track season I just wanted a cheap way to add extra power w/out wasting money on header, cams (or things that I will not use when I boost). I figured I might as well try E85 now, pick up some power & get use to it before I boost. I already have DSM 440cc injectors & new walbro 255lph intank fuel pump ready for install.

My questions are:

1) E85 works great on boosted cars because the compressed air. They say E85 can be used on high compression motors to see 10-15% gains throught the powerband. Stock usmd b18c1 CR is 10.1, is that high enough to use E85 and expect gains?

2) Do you know of anyone who has used E85 (tuned) on a fairly stock b16, b18c motor with good results.




I'll be converting it when I boost anyways so the cost of switching over to E85 is not an issue. I just wanted to know if the WHP GAINS would be worth spending $150-200 on dyno tune session.

TunerN00b

E85 offers higher octane, allowing greater compression and further advanced timing with less concern for pre-ignition.

That said, a stock US GSR is 10:1 compression. E85, even with supporting tuning, won't gain much, if any, power, in my opinion.

No personal experience.

tony1

Yeah, probably not worth it.

Maybe a few % hp increase at best.

lohatch

i have seen 7% on a turbocharged application. e85 vs 110 race gas. same day same dyno. just changed the tune.

it probably wouldnt be worth your time and money to make the switch and tune though. but my daily driver doesnt mind about a 40%mix of e85 and 87. runs pretty well. stock ecu 11:1 comp D16

Charlie Moua

iTrader: (3)

I'm just thinking to myself....
....do I go E85 now or just wait and save the dyno money for tuning when i put the turbo on & then go E85, or spend money on $200-250 header...

Thanks for the feedback. I think i'll wait on the E85 until later.

lohatch

dont you have the turbo kit already? what the hell are you waiting for? put it on already!

PyroProblem

Put the E85 on there and throw her on the dyno. Youll be able to get a feel for the new fuel and work out any issues you might come across...
If you decide to get a headernow, you could always sell it down the road probably for close to what you paid for it...

HiProfile

I agree with that, best to test it out now. Worst thing you need to "fix" for a header install is a broken stud or broke spring bolt. Turbo cars usually gain 5-8% in power, both from timing and leaning it out. You may not get as much with a 10:1 cr NA motor, but I've seen a few examples with other makes where it's quite a bit more than expected.

W/o a tune the header won't add a whole lot. However if you were to find a cheap, used header, you could dyno tune it on E85 and make much more than the same money spent on a decent header alone. Then save up for a good header and sell the used one same price you bought it for.

IMO E85+tune sounds like the best bet.

Charlie Moua

iTrader: (3)

hahaha..... I think i stopped collecting parts back in 04 and just disapeared from the entire honda thing until just this past summer when i dusted off my ef from a 7 year slumber.

yeah I already have the apexi turbo it... i've had it for like 5yrs man.
The only thing i need are larger injectors if I want e85(maybe 650cc), FMIC with piping, gauges(boost, oil temp, egt, fuel pressure).

And from talking to other guys that have run this kit on B motors, I really really need someone to make me a 2.50 or even 2.75 down pipe because my current cast elbow really hinders the top end.

I do really want to try E85 out first.... so i'll talk to jordan to see how much time/cost it would charge to tune it. I'm thinking 1.5 hours tops?

DDTECH

e85 makes power by volume fyi.

lohatch

just buy the injectors, put the kit on, we'll make the DP and then put it on the rollers! stop messing around. lol

702Prodigy

Please explain. currently tuned on 100 octane. Thinking of maybe switching to e85.

lohatch

i think what he might mean is that you are running more fuel (20-30%)which is taking up more combustion space raising cylinder pressure.

ethanols molecular structure is C2H5OH. meaning to contains oxygen. so you get some addition oxygen with the fuel also.

e85 is also around 105 octane so you can run a lot more compression than you would be able to on pump gas, which also picks up power.

Charlie Moua

iTrader: (3)

If I do it, I'll let you know how it went.
I first have to install my walbro fuel pump & dsm injectors and find a used aftermarket header.

Charlie

JDMFunk2891

yeah not worth money for dyno time... your gaing will be minimal unless there is morew internal work done on motor otherwise tunning wont due very much.... there isnt really much you can do for cheap that wont be a waste turbo and all motor are so different .. only thing that will help both turbo and n/a is making your car lighter.. just strip the **** out of it ha

Uncle Dave

He will need ID725cc injectors a very good ECU and it will be no problems making good gains.
Just read the first post if you are going boosted dont even worry about it till then
Regards Uncle Dave

00MRSi

If your ultimate goal is to boost and you pretty much have almost everything you need, I say get the turbo kit installed now!

Boosted3F

ARP Head Studs-Sleeves or Block Gaurd-while changing Fuel Pump switch to e85-Turbo kit- and Dyno Tune easily boost 15-20 psi no problems safley and push 350+ depends on what bolt ons you have need more info pm me i drive mild built gsr ef with ls tranny on boost 480hp stock rebuilt internals

seelback

i picked up around 9whp switching to e85(cant exactly remember off the top of my head) on my oem b20z/vtec b16 head with a 2layer head gasket, which is roughly 10.0-10.2 compression. and went from running 13.1's to running 12.8's in the 1/4 mile, mid range and torque is what improved the most. i know the e85 pumps say 104 or 105 octane, correct me if im wrong, but isnt e85 the equivalent to 115-116 octane due to the detonation threshold?

Rocket

Agree with LolHatch's theory.