1slow98Z28

iTrader: (3)

just wondering if i would be worth it to get the Fast intake or would i be alright with the SLP Ls6 intake??

iamsickofitall

iTrader: (18)

FAST 78mm - not worth it over an LS6

FAST 90mm - if you are on stock cubes and heads, then stick with the LS6...the only time you should consider a FAST90 on a stock cube motor is if you have ported heads.

slow trap

iTrader: (22)

and a bigger stick

orangeapeel

iTrader: (18)

I did the 78 because I got it for the same price as an LS6.

orangeapeel

iTrader: (18)

Go to the for sale section and get a used GM one for $300.00. SLP = $500.00

300bhp/ton

Ultimatley the 90mm FAST is better and on the correct setup will provide more power even on stock cubes. But you do really need to exploit the higher rpms to see the gain, this means a minimum of bolt ons and a cam which revs higher than stock.

The FAST 78mm works in the same manor and on the correct setup will out perform the Ls6.

Having said all that though the LS6 intake is very good and many people have produced very good numbers with it.

There was a large test of heads/intakes a couple of months back and the conclusion was that a budget set of heads with a FAST 90 would match or exceed the same cam using top of the line heads and a LS6 intake.

Typically in a cammed or h/c LS1 the FAST 90 should be making about 20rwhp more PEAK HP over the Ls6, although the under the curve performance will be pretty even upto around 5000rpm.

bjamick

iTrader: (31)

i wouldn't waste my money just get a ls6

black01_WS6

iTrader: (13)

I would get a nick williams TB and get a ls2 manifold ported. It is not as good as the fast but better than the ls6. I have a guy down here that does it at a very reasonable cost.

300bhp/ton

ummm I wouldn't minnd seeing proof of the LS2 intake outperforming the LS6 on a 346ci motor.

RGR Pete

I saw a good gain(dyno) with the fast (h/c) with tuning. Without any tuning I gained a whooping 1HP. Still waiting for ET/Mph results...

52172

iTrader: (2)

ETP is supposedly coming out with a new manifold for cathedral port heads. Don't know what the price will be, but it should be the best manifold out to date.

ShevrolayZ28

iTrader: (4)

I think I remember reading about a heads up comparison and the LS6 actually performed better than the LS2.

52172

iTrader: (2)

yes you are right there were a couple comparisons and each time the ls6 performed better than the ls2. The ls2 aint worth **** unless ported.

00454sscamaro

ls2 still an improvement over the ls1 though if i remeber right ... i cant beleive the prices on these parts..... i can get an aluminum intake manifold for my 1st gen small block for 100$brand new , but i cant get the best Plastic?! one for under 800 seems like a whole stinky situation to me. i think it would of been cheaper to steal the engine out of my 84 , then to keep going with my ls1. performance vs =performance.

bjamick

iTrader: (31)

ya i dont see the ls2 out performing the ls6 sorry unless i see otherwise..

98camaroLS1M6

iTrader: (35)

fast will kill low-end torque on a stock cube engine, stick with an ls6 intake unless you are a 6speed car going for the cam only record

300bhp/ton

yeah that was my point. On a 346ci IMO the LS2 intake is not worth it, ported or not.

300bhp/ton

Got any proof of this?

From what I've seen it will match and exceed a LS6 from tickover upto about 4500-5000rpm where it will produce significantly more. Never seen it loosing out at any rpm range. Plus a ported FAST works even better in the low rpms than a stock one.

I will admit, that to see the most of the FAST intake you do need to be looking at the 5000-7000rpm area, so a good cammed or h/c car with raised rpm limiters is the way to go. - IMO

sho-me speed

iTrader: (55)

Here is the comparison of all the intakes on the sam motor with a good size
cam (.605 ish lift and mid 230's duration)
http://www.tpis.com/plog/index.php?o...Id=14&blogId=1

Cop Car

iTrader: (14)

no

creates tuning issues and just in general does not impress me for the impressive cost. IMO you are either fine with an LS6 intake or you should step up to a sheetmetal style.