ArmZ28

Hi there guys.

As some of you guys might know, I am now turbocharging my 98 Camaro.

I have 427ci LSX Block with forged internals, AFR 225 heads, EZ-94X turbo, 232-238/116LSA cam, a huge intercooler etc. The engine is built now and the piping process for the turbo is going on. The piping will be 3" stainless steel, as the in and out ports of the IC are 3" wide.

I have an LS6 intake manifold with a ported BBK 80mm throttle body. I searched the forum regarding whether I will need to change the LS6 manifold with a metal one like a Victor Jr. Even though there are a lot of threads on the board related to manifolds, I could not get the answer to my question.

As far as I understand from the threads I read, the LS6 manifold is ok air distribution wise (i.e. not noticable loss of air pressure at the cylinders #7 and 8), and Victor Jr has some even distribution issues; at least as much as a LS6 manifold due to not having equal length runners. I do not wish to consider Super Victor due to hood clearance issues. But I might go with it if it is just "perfect".

So, here comes the question. What is the highest boost available for a LS6 intake? I have read that Mightymouse has reached 23psi, but apart from that has anybody reached 30psi for instance? Has anybody experienced a blown LS6 manifold due to high boost?

My goals are 1000+rwhp at the beginning and more later, maybe after changing to 6 bolt heads. Will I be able to reach my goals with LS6 manifold and BBK TB? Or would you guys just recommend I buy a Victor JR and an intake elbow to be safe?

Sorry for some possible spelling mistakes. It is 4.32am here now and I am more than exhausted

Pro Stock John

iTrader: (34)

I'm sure the Ohio Boys or Matt Harlan ran an LS6 intake to 27/28 psi at some point over the last 6 years.

ArmZ28

Thanks for the input John, 27-28 psi is not bad for boost

InconFormula

iTrader: (7)

I think we went 30 psi with an LS6 and 30+ with a single plane carb style(vic jr.) and had no air distribution problems that people talk about???

HUNTER02SS

iTrader: (24)

Mightymouse also uses a LS6 intake as well. He ran 8.70's with his and a stock throttle body!

kp

iTrader: (34)

I'm a lightweight at 20-21psi but I went 8.90s with one and a stock TB with a 347.

Never had any distribution issues myself..

Y2K WS6

iTrader: (33)

I'm kind of new to this but wow, what kind of HP numbers did you post to get there?

kp

iTrader: (34)

~750 rwhp, but thats with a TH400, slicks, 9" ford rear and 8" 5500 torque converter - a dyno queen it was not..

~LS1_TA

sic :d

ChevyChad

iTrader: (50)

https://ls1tech.com/forums/forced-in...-manifold.html

I think its just my luck, but mine blew up at less than 20 psi... I have a BBK SSI now. + 0.02 FWIW

ArmZ28

Those are great boost values, and I should be ok with my LS6 manifold I suppose.

I am sorry about your problem, I hope you will be fine with your new manifold.

I know that a Victor Jr manifold is what most people use in their turbo setups, mostly because of its strength I suppose, but I do not wish to spend unnecessary money by just purchasing one instead of my LS6 manifold, even though it is not an expensive piece. I might use nitrous and meth as well in my setup, that is the reason why I can not decide whether to keep the LS6 or not.

Thanks for the input guys.

stevieturbo

You're engine will blow up before the LS6 manifold.....

ArmZ28

Why do you say that??

Do you mean that LS6 manifold is so strong that it can withstand much more than a LSX block with forged internals and a decent tune, or do you mean that I have something wrong in my setup?

If you think that I did something wrong, please let me know, as I have decided on my setup after the research from this board and I will be glad to hear the mistaken points before I blow up anything

ArmZ28

I am aware that the weekest link might be the heads as they are 4 bolt AFRs, I am planning to get 6 bolts in a year or 2. Apart from that I will be happy to hear your comments Steve.

stevieturbo

Not at all. I do simply mean the LS6 intake has been well proven, in many many fast cars, making quite a bit of power, and I have barely heard of one manifold breaking.
Perhaps a Nitrous explosion would destroy one...but thats only to be expected. But boost alone.....doubtful.

Of course...as an experiment, why not build a jig, seal up the entire intake, and start pumping some air in, to see when it pops !

ArmZ28

Cheers for the input! For the nitrous, I already have MSD window switch, so it shouldn't be a problem either if I set up the switch from 3500rpms onwards till just before the redline, if needed.

I think I will just stick with my LS6 manifold and design my fuel system accordingly

Gordon0652

iTrader: (4)

Interesting question.
Just for kicks i just removed my LS1 intake so i will use that for an experiment. I will plug all the holes and fill it up with air until it pops. Could be fun.

barnat

iTrader: (59)

I was thinking the same thing as you last year when I building my forged 6.0 LQ9 block for my APS and was told that the cast iron LS series 4 barrel intake with a 90 deg elbow was not only stronger then the factory LS6 for major boost , but flowed alot better under FI conditions and tunning was also much easyer with this setup then with the LS6 intake. Now,this was told to me by a mass air flow tunner when i was thinking of mass air tunning before i realized the win / win with SD tunning over mass air and without notching the cowl on my car for this set up to fit .LOL But i do see alot of camaros running these cast GM 4 barrel LS series intakes with the 90 elbows when big time turbocharging. Im just wondering,,, is this true or not about the tunning and flow benifits of this cast intake when compared to the LS6 ? and strenght is a given im guessing with cast over plastic

kp

iTrader: (34)

I wouldnt stand anywhere near that thing, it could go off like a grenade if you try that..

Moparnos (The SLP Guy)

iTrader: (55)

lol your crazy