ok i read around alot of people here and other forums with wanting to do 11:1-12:1 on turbo E85 builds but no real "if it worked" conclusions.. any one here with real world experience with higher then norm comp. and E85/ turbo set ups? I know E85 pretty much wont knock but will that be enough to keep it alive.. hoping to get in the 800hp range.

I guess what i am getting at is like so many other people is i have a nearly new super fresh stock cube LS6 12.5:1 nitrous motor with all the good internals with a sweet set of cnc ported 243 heads that had bowl work done to mate with the domed mahle forged gas ported pistons and hellfire rings gapped for Nitrous/ high heat. so i could possibly swap a set of 317's and have the bowls worked to work with the pistons..but it seems like alot of work to drop .5 a point or so..

sooo...I really down want to tear this motor down and swap pistons. if i have to pull the heads and run 317's (how many CC's can this chamber be machined to safely?) thats no biggie. thickest cometic head gaskets with a larger bore? what would be a good suggestion.

Also i have a Trex V2 cam would this help keep chamber pressure down under boost since its a NA cam and the valves stay open longer during the compression stroke? or am i just retarded

What all i have so far
-Two presicion 61/62's with the race cover and .83AR exh housings and stage 5 wheel
- tubular 1 5/8's headers, 2 1/2" to turbos
-Aeromotive eliminator pump and controller 10A up 8 A back. boost ref reg.
-2 tial 44mm gates, 2 TurboXS BOV's
-90% settled on this large dual 3"inlet 4"single outlet air to air intercooler rated at 1300hp i found.
-not totaly against A2W but carry bags of ice would be a PIA lol
-105lb bosch injectors.with billet rails.

 

Bigger injectors and pump will be needed

 

only thing with E85 is it has 'quality' issues depending on the time of year. its strongest in summer, weaker in winter and fall. Im not saying this will cause issues but its definitely something to keep in mind if high compression is involved. Staying up to date on your tune would cure that though
I say go for it.

 

more fuel then 800lbs/hr?!?! even at a 30-35% in additional fuel needed this should still be plenty of pump for 1000hp? and why larger then 105lb injector?

im shooting 800hp range in a 2750lb car should bust some heads on the street.

as far as quality issues my buddy owns a dyno shop and there all honda nerds crazy over E85 so they have E85 testing kits and there all over it for QC on the local E85. they keep me up to date on batch quality and so far its all been pretty decent.

 

I think you need to do some research on here, a lot of that is a horrible setup for 800rwhp on e85. Plenty of 800rwhp combos you could easily copy that work great.

 

Yea, but like he said, hes already got a nitrous engine, and wants to use it so he doesnt lose his ***.

Id do it, in a heartbeat.

The compression is going to be a killer if it gets hot. Make sure you have a hold on the tune up, or it could get really ugly really fast. Id also use a good meth kit to keep it cool, and a good intercooler.

Temperature is a killer in turbo cars. Add tons of compression, and it kills even more.

Whats the cam like?

Louis

 

Also, I think that 100lb injectors will be fine for that power level.

 

If he is like any of us he will make 800 and than want more lol that's the only reason I said go bigger lmao

 

call me crazy here but if you have a "nitrous" engine then just spray nitrous. Save up money for a turbo setup, but while your saving you can already be racing with your current setup

 

DO it and let me know how it goes. I want to turbo my 13.67:1 compression motor eventually. I can't imagine a 94mm on something that makes around 600rwhp to the tire NA.

 

I have read set ups performing with a dynamic compression ratio in the low 20's on E-85.

 

Is meth still effective with E85? I was debating on the 100% alchahol kit but wasnt sure how it plays with E85? .

Well a bottle or two a night is about 120$ plus race fuel it cost me like $250 for a week end of racing.. So i started saving all that money and already bought everything to do TT's accept a IC.

 

And yes the motor was built by whistler and it runs so damn good id really hate to screw with it. Its been trouble free for quite some time now. And it never gets a babied.

Cam is 242/248 608/612 on a 110 LSA
sooo should i at minimum swap out cams for a boost friendly cam or would a lower duration cam hurt more with higher chamber pressure and more heat?

Is it true or not if the part makes power on a NA car it will make power on a boosted car? lol

 

You said the car is 2500 lbs? what car is it?

 

2750 fueled up, no driver. 87 mustang coupe. its been best of 10.7x No nitrous all motor.
i also have a WS6 TA to, but i cant beat the weight/power ratio of this **** box.. plus it dose not kill me to take a plasma cutter,sawzall or torch to it, weld **** to the car and cut it back off lol..

i talked to frank at PSI motorsports and he didnt seem overly concerned with the compression ratio and E85. he owns and tunes multiple 2500+hp cars..so i guess he knows what hes doing haha He did say lower would be better but not a absoulte.

 

Louis is no rookie not by a long ****

Love mustangs with LSX

 

is this like when your a pro at surfing the web while taking a dump?? haha jk

oh i know i read many a post from louis.makes me feel better he chimed in on this. i just sold a LG G5X2 cam a few months ago like a idiot. i loved that cam but i didnt think i had any use for it..turns out that cam probably would of been a better choice then this Trex cam..


talking about dynamic vs. static CR's my car is 12:5.1 static which from my understanding is about half a useless term.. is it true that my dynamic ratio would infact be lower then my static? And when ppl talk about you need X:X.1 compression for boosted cars are they talking static or dynamic? cuz these are two totally different things? right?

 

Static is very important, as is dynamic. They are both important, but more so on your setup because now we have to get the cam right so our effective (aka dynamic) is turbo friendly.

Dynamic will be lower, it's just a mathematical number we use to design cams. It's one of many aspects we consider, but typically we can predict future compatibility with fuels based off that number. Don't forget, a stock ls7 is 11:1, but dynamic is in the high 7s. Change the cam and we bring dynamic up to mid to high 8s on pump fuel.

What cubic inch is the engine?

As far as methanol, it's completely compatible with e85, and very much needed to cool it.

 

[QUOTE=Louis;15837860]
What cubic inch is the engine?
[QUOTE]

Its a standard bore LS6, so 346. Its my old car. Just following along and missing the old stang.

 

stay tuned Craig this **** box is about to get turned up haha.. its going on the dyno for one last NA shot on E85 vs gasoline test, i put some 42lbers in it and the fuel system along with a autometer pro wideband.. i just want to get a max NA tune out of it and then its coming apart for the turbo build and the tranny/converter are going to my buddies trans shop for a freshen up... i debated on doing a build thread (hopefully it all works out and makes power lol) or im sure ill get alot of " i told you its gonna scatter" posts

so louis can u spec me a cam that would suit a E85/hi comp set up? i can pm you every detail on the motor/heads/driveline if you need it

Also whos methin inj. kit you recommend? i had my eye on the alkycontrols kit seems to be a nice setup for a good price