HottLS1Z

iTrader: (5)

If this comes out and backs up its claims screw the FAST 90/90 setup I was going to do when I do my heads this winter I'll go this route. About time someone came out with a composite intake to rival FAST that does not include the insane price of the FAST combo.

http://www.v8tvshow.com/forum/index.....msg437#msg437

Patrick G

iTrader: (14)

Don't hold your breath. Early reports show the runners in the Weiand manifold to have smaller cross sectional area and longer runners than both the FAST 90 and the LS6 intake. What this means is that the Weiand manifold will make better torque and hp at lower rpm, but it will run out of breath above 6000 rpm.

Even Weiand's own dyno sheets show it being passed up by the LS6 and FAST intake above 6000 rpm. If you're looking for a great street manifold, this is worth considering, but if you're looking for something that makes lots more peak power than the LS6 or FAST 90, you may want to wait for some unbiased 3rd party testing.

HottLS1Z

iTrader: (5)

yeah I was planning on waiting for someone else to be the guini pig of course but seeing as the stock redline on the engines its made for (LS1,LS6,LS2,L92) is 6000-6500 I cant see them not being prepared for this piece to go on a modded car considering it is a mod itself, guess time will tell.

99blancoSS

iTrader: (115)

Doesnt FAST have a 102 or something coming out?

PREDATOR-Z

Yeap, Weiand even states power range from idle to 6200 only, so for torquey A4 and the proper cam, this is a good alternative to the LS1/LS6 OEM pieces.

The nice part is they will bring out a L92 head compatible unit

RareBreed0295

iTrader: (35)

I think ill just stick to the proven performer.

Old SStroker

The untouched ugly truck manifold outperforms the LS6 manifold on 5.0L Daytona Prototype engines which make max power ~7000. I believe those engines make the kind of power most 5.7 and 6.0 LS engine guys would be proud of.

Runner length should be pretty easy to measure @ PRI.

RZRSEDGE

iTrader: (21)

In my opinion, the one piece design would make it difficult to port. The multi-piece design of the FAST would be superior for this aspect if nothing else.

LS1Silverado05

iTrader: (41)

Good to see more products come to market. It does kind of suck that it drops off. How does the torque or a FAST compare to this? They said 30something lbft at 4000?..Where does the fast come in on torque?

c5_ls1_6spd

iTrader: (-1)

I'll stick wiith my ported fast 90

MPHmotorsports

iTrader: (18)

Yep.... If you know how manifold's work then then common since will tell you this manifold will struggle to 7,000 RPM's. The long runner will make for more downlow power/TQ but will hold back the up top RPM range.
The L76 manifold is similar. It has a large runner but has a long runner as well, this hurts the top end potential of many combo's.
I think this manifold will be a great street manifold and depending on the price... might be a good move for the 98-2000 guys who dont have a LS6 intake manifold already.

MPHmotorsports

iTrader: (18)

I thought I read it was only a 92mm but a 102 would be cool.

Keith

So, It will work great on my truck.

NJSPDER

iTrader: (2)

it sounds like the new weiand would be great for an autocross application where most of the time is spent in the 4500-5500 range if you are geared right. extra torque when you are only flashing higher rpms once in a while is very helpful.

MPHmotorsports

iTrader: (18)

I would say that statement might be very accurate, but only time will tell.

Jeff@TotalPerformanceEng

iTrader: (6)

Whats the runner length of the FAST and LS6 manifold? Also, when it comes to sheetmetal intakes, what do their runner lengths usually end up at?

Sorry for the hijack.. Just trying to get an idea of how these all stack up..

StripedZebra

iTrader: (6)

So does the manifold now flow as well as an LS6 6200rmp+ or will it still be a slight upgrade over the Ls6? Even if it were a slight upgrade, it might be worth it for the added low end torque you would see...?

Ilikeppie

iTrader: (5)

so 0 to 100 times would you want more rpm's (F.A.S.T) or more low end torque (the new wiend)

Patrick G

iTrader: (14)

You want power under the curve. The first 60' the low and mid range are important, but after that, it's pretty much all top-end.

MJD

iTrader: (1)

Everyone must run awfully big cams on this site. I run a 222/228 cam and it would be pointless for me to rev past 6200.