99beaSSt

iTrader: (1)

LQ4 366ci
Forged Pistons ~9.5-1
Forged Rods
Stock Crank
Ported 317's
1.7 or 1.8 solid rockers
All ARP hardware
Clevite Bearings
Ported LS6 oil pump
D1SC @ 12-15 psi (maybe more)

I should be ok on the fuel system cuz im running nitrous right now(60lbs injectors and a 255 walbor with racetronics upgrade). Im a little unsure about valvetrain, gaskets. Im open to suggestions on cam, lifters, push rods and length too and gaskets. Hoping to make in the area of 650-750 HP (am i wishing or is it possible?) Any imput would be great thanks guys.

ss.slp.ls1

iTrader: (36)

You might need to go with dual walbro's. I think you are ok on the injectors. Only way to know for sure is to check your DC%. For the cam I would get a custom spec'd cam for your application. I think with that PSI range, you could easily hit 650rwhp. One thing I would change would be to use a smaller chambered head (like some ported 243's). That way when you step up to a AFR/TFS head, you won't need to change pistons.

99beaSSt

iTrader: (1)

Who would i need to talk to for a custom cam? any ideas on push rods lifters or springs?

reamo04

iTrader: (9)

cammotion and bullet cams are two of the leading companies

99beaSSt

iTrader: (1)

Is it possible to have a "lopey" cam and boost?

1_bad94Camaro

iTrader: (15)

as long as the cam is a 115lsa or bigger. i've heard some that were lopey but i'm not sure if it was a boost cam. it was in a procharged gto.

ReApEr75

iTrader: (4)

The EPP cam is somewhat "lopey" and is made for blower applications.

blue00ZZleeper

iTrader: (5)

You will need 2 walbro pumps for sure. Anything more then 650ish you should start looking at -8 supply line on a return system. Max that D1 out and run meth and make around 750ish lol Look up videos of the EPP cam. Its pretty lopey and will do well for what you want. 60's should take you where you want to go as well. I suggest atleast PRC extreme springs.

1_bad94Camaro

iTrader: (15)

if you need pics of the dual walbro set up let me know. I've got my twin setup for my truck put together just havnt installed it yet.

99beaSSt

iTrader: (1)

Yes I would like pics can u send them to batman4140@yahoo.com

1_bad94Camaro

iTrader: (15)

I sure can. I'll take some pics when I get out of work.

sschoeffler

iTrader: (24)

Defiantly dual walbro's. 60lb injectors will do fine. You can run a 8an supply line with a -6an return and be just fine. It will support 1200 horsepower. Some people use the factory supply line as the return, but it looks a hell of alot better if you just run some extra line for it. Best place I have found the braided fuel line is silicone intakes as you can get all of your supply line, return line, and all the fittings you need for under $300. Their line is also PTFE lined so you dont get that fuel smell in your garage from the vapors seeping from the usual braided fuel line. Patrick G can spec you a cam tailored specifically your engine and how you want to drive. I have also heard alot of good stuff about Bob's blower cam.
I would go with some LS7 lifters, Comp Cams hardened pushrods, Genuine GM gaskets, not those Felpro's. As far as head gaskets go, I went with Cometics, but I havnt gotten much time to drive on them with the supercharger plumbed in. There is internet talk saying that LS9 head gaskets are the way to go for blown applications.
Good luck with your build and remember to post progress of your build, I'm sure there are alot more than me that likes to follow up on people building their engines.

Stephen

99beaSSt

iTrader: (1)

Does GM sell the MLS (???) gaskets, have you hears why LS9, besides already being on a "blown" car are good? what length is everyone going with on push-rods (sorry just not to knowalageable on them). Is Patrick G member on here? If not not, Where would i begin to find him?

99beaSSt

iTrader: (1)

Just let me know when you send them cuz i get a bunch of dumb sh*t and dont want to delete them.

sschoeffler

iTrader: (24)

Patrick G is a member here, Its also his user name. Pushrod length will always vary from cam to cam. You will need to use a pushrod length checker once you get your cam to determine what size pushrods you need. Stock length pushrods are 7.400 There are many writeups here as to how to use one. As far as the head gaskets go. I went with the cometics but several people have said they were pushing water with the cometics and the LS9 head gaskets cured their problem.

99beaSSt

iTrader: (1)

Im confused, i was under the impression the LS9 had a bigger bore. So how will the gasket seal properly?

99beaSSt

iTrader: (1)

LQ4 366ci
Forged Pistons - Diamond 9.5-1
Forged Rods-callies "H" beam
Stock Crank
Ported 317's
*EPP blower cam
*Patriot 8401 Gold Springs
*Comp 7955 Push Rods
1.7 or 1.8 solid rockers
LS7 lifters
Katech C5R Timing chain
All ARP hardware
Clevite Bearings
Ported LS6 oil pump
Another Walbro 255
D1SC @ 12-15 psi (maybe more)


* Comes as a kit from EPP

If anyone sees a "weak-link" please speak up. Still looking into head gaskets (LS9 or Cometic) Hoping to make in the area of 650-750 HP

ReApEr75

iTrader: (4)

Guess you liked the EPP cam lol. Good luck on your build!

98Z28CobraKiller

iTrader: (17)

That's incorrect. On a supercharged application with a free flowing exhaust, the cam shouldn't look too different from an NA cam as supercharged cars can take full advantage of exhaust scavenging unlike turbo applications in which case lower overlap is GENERALLY recommended as the high exhaust pressures can backup and contaminate the charge.

99beaSSt

iTrader: (1)

Well i called a local GM Dealer and turns out LS9 head gaskets are only $62 each so i might be getting them. Just one question, How many lbs of boost can safely be run on these gaskets? Im thinking of pushing 12-15 but maybe a little more like 18, Do you guys think it will hold?