meatyz

iTrader: (2)

im doing some cleanup under the hood im gunna take the intake bolts off and paint em does anyone no the torque specs for them?

Darkman

iTrader: (2)

Same as stock - see attached.

99LSS1

iTrader: (12)

Do not torque to stock specs!!! Check with FAST. If I remember correctly they are saying to tighten only to where the gaskets are Crushed.. I have seen these Manifolds Crack if you tighten to stock Tq specs.. I usually only go to around 74 # in. Make sure you use the proper Tq sequence.

meatyz

iTrader: (2)

thanks for the info how many foot pounds?

cookba

iTrader: (10)

89in/Ibs maximum is what my FAST 92mm install manual says. you do one pass with 45in/Ibs then the final pass to 89. and there is a Tq sequence as well but i dont have a pdf of this.

camera phone to the rescue:

Darkman

iTrader: (2)

I just installed a FAST which why I knew the FAST specs are the same as stock in terms of sequence and torque values.

99LSS1

iTrader: (12)

I wasn't trying to bash your info!!! I have installed probably 150 of these and have never torqued them to those specs, And never had one with a vaccum leak!! The Composite is just not nearly as strong on the FAST as it is on the stock intakes. I usually Torque them to a Max of 80 # in.

Squirts11

iTrader: (14)

I had a vacuum leak when I installed the stainless allen bolts supplied with the intake. A week later I swapped back to the stock hex bolts, problem solved. A buddy had the same issue.

meatyz

iTrader: (2)

dont say that lol i just ordered the stainless bolts for mine from thunder racing

chrs1313

iTrader: (24)

yup the reason why you had a leak was the bolts backed out...happened to me too even using red locktite after less than 100 miles they were ~35 in lbs

most have a very low coeff of friction between the aluminum block and stainless hardware...I switched back to stock and the problem was solved...

I would run the stock hardware

mikeyc34

i believe that stainless has a lower yield point and therefore stretches. just like if you get ss header bolts. they must be toqued multiple times before they are good. i have he ss locking header bolts and there was no chance they backed off.

99LSS1

iTrader: (12)

Glad I re-read your post!!! I thought you were saying you went back to stock Valley cover bolts!!!! You actually went back to the Black hex bolts supplied by FAST.. The reason I respond is cause we just pulloed a FAST 90 where whomever installed it used stock bolts on the valley cover and CRACKED the **** out of the intake!!!! $1000.00 down the drain for this guy.

jegten

iTrader: (22)

thanks for the info.
posting for future reference.

5.7L LS1

Hi everyone,
I'm wanting to buy a FAST LSXR intake manifold for my GM 5.7L LS1, and I'm unsure of everything i'll need.
Right now I figured I need; LSXR 102mm Intake manifold, FAST 102mm throttle body, Fuel rails to suit intake manifold, Fuel rail connector hose and rubber seals for intake manifold and throttle body.
Would someone be able to let me know what else I will need for the install?

Thanks

QwkTrip

iTrader: (23)

Instructions are available to read so you can get a feel for the job and what parts are needed.

https://static.summitracing.com/glob...fst-146302.pdf

5.7L LS1

Thank you so much!!

Does anyone know any good tutorial videos on installing this intake?