SoCal_T/A

ok so as far as an ls6 manifold goes witch one performs better. the weiand or the gm ls6?

staringback05

iTrader: (8)

im happy with my gm part

Red99TA

iTrader: (11)

I thought they performed the same

SoCal_T/A

im thinking bout heatsoak etc

Justin00SS

iTrader: (5)

You are thinking wrong.

Gen I SBCs never had a problem with heat soak and all of them had iron/aluminum intakes.

moeZ28

iTrader: (7)

How do you know??? They didnt have composite plastic intakes to do a comparison with...so, how do you know for sure they didnt??? I would love to see a comparison of an old school single plane vs. a composite single plane on a dyno....that would be cool.

orangeapeel

iTrader: (18)

Don't worry about the heat soak guys. It is happening, but not enough to make a difference. This is also why you don't see people running around town with their sheetmetal intakes. If I were you I would stick with the for sale section on this board and get an LS6 intake. So many people are switching to the FAST these days, it should be an easy find.

SoCal_T/A

there must be a reason everyone is going with fast over ls6. im thinking why not just skip the ls6 phase and go right to a fast

Red99TA

iTrader: (11)

There is a reason...it flows better than the LS6 or the Weiand. It's overkill for an LS1 unless you've got a pretty decent sized cam or head/cam combo. Remember that the more HP you start off with, the more HP a FAST intake (or any intake for the matter) will give you. If you really want to spend the extra $1100 for the extra 5 RWHP that the 90/90 FAST combo will give you over an LS6 then go ahead. If you think about it then it's around $900 extra since you would spend $300 on a used LS6 anyways. It's just something you won't have to upgrade later down the road once you start making bigger numbers. I found a used 90 on this board for $600 then bought my TB for $400 and got $425 back for selling my LS6 and ported TB...overall it cost me $575...not bad at all.

SoCal_T/A

i just plan on making big numbers and dont wanna have to go back and do it agian. i figure with what i got planed it cant hurt

5_02ls1

iTrader: (20)

the wiand can be ported it has a removable plate that gives acess to all runners + it looks better IMO

Summerwolf

iTrader: (3)

You can port the FAST in the same way and its composite....paint it body color and it looks bad ***

SoCal_T/A

yea but ive heard a fast leaks boost and cant handle 15 psi plus. is that true?

orangeapeel

iTrader: (18)

Possibly. But it is Composite, not Kevlar. I would go with a metal intake if you are thinking of doing som higher PSI boosting.

lilbuddy1587

iTrader: (1)

Do a search but there was a flow test and the weiand got its *** handed to it compaired to the ls6, ls6 oval, and fast

Justin00SS

iTrader: (5)

There are ALOT of manufacturers still using metal intakes.

The vq engines from Nissan all have aluminum intakes.
Honda uses aluminum intakes.
The Xjz engines in the supras have aluminum intakes.

Hell I don't even think there is a plastic intake out for the LT1/4 and there are a shitload of those guys making GREAT hp/tq and running low low times.

I just don't think the air sits in the intake long enough to make a difference. Just like with the tb bypass.

cowboysfan

since we are on the LS^ subject here, how about the company that cuts off the T/B openings of LS6 intake (78mm) and sticks a 90mm opening on it. would that be like a Fast intake w/ 90mm T/B? anybody using this or know somebody who is? does it fall apart after awhile? any feedback guys. what is there name? I dont remember .



fuerzaws6

Justin00SS

iTrader: (5)

Oh yeah.

What about the guys with the 03/04 cobras with metal s/c and intakes on their cars. I guess the heat soak kills them too. lol

BigKap94z

iTrader: (47)

I believe TPIS is the company that does that.

lilbuddy1587

iTrader: (1)

Yea actually, it KILLS the performance. Heat soak on the 03/04 cobra is very well known, so quit while you're ahead dude.