FI402Z

I am at the point in my build where I have to decide on intake, just curious what the FAST will handle. THANKS!

SSdreamz

iTrader: (3)

its going to blow to pieces! sell it to me before that happens! hahaha i have no idea though

ChevyChad

iTrader: (50)

Saw one guy havin trouble with his at 16psi iirc.. Do a search in here, and I'm sure you will find it.

whiteboycntdnce

iTrader: (5)

A friend of mine was having serious issues with his FAST on his supercharged setup... I had a FAST before, but traded it for an LS6 and some cash when i went FI

MY99TAWS6

iTrader: (3)

No problems running 8 psi for 5000 miles .Its fast 90 not 92. I tapped and drilled hole on back and put fitting in for vacuum line and moved the map off it.
I loctitied the hardware. Made sure the gasket was in properly between the shells and put rtv in there.
I have seen guys run to 20psi on them. I am a bit afraid that my burst panels might burst prematurely .

I plan to take mine to likely 15 to 20psi max next season see how it works out.

MY99TAWS6

iTrader: (3)

From another recent thread..

Motor is
6.0L iron block 402
Ported LQ9 Heads
Callies Crank
Callies Rods
Diamond turbo Pistons
Custom grind cam
Fast intake
__________________
02 TA SOM, WS6, M6, 402, APS Twin Turbo 837 RWHP 944 RWTQ 14 PSI
New numbers with LG's Turbos 930 RWHP 819 RWTQ@ 18 PSI spinning on the dyno!
By BOOST PERFORMANCE

Seems the fast can do ok. Guess see how it holds up to long term use at this level.
Not sure if he has 92 or 90 fast either??

98Z28CobraKiller

iTrader: (17)

It worked killer on mine at 16 psi. I removed all the gaskets inside and filled the channels with black rtv. I also threaded and plugged all the holes. I'm going to try to take it to 20.

Mr.Big

15 psi and fine here

speedracer5532

iTrader: (8)

19 psi here...nothing special done to intake and no problems.

FI402Z

Hey, thanks guys! I did try a search but the words "FAST" and "PSI" seem to come up in about every thread on here.... LOL! What is the difference you are referring to on the 90 vs 92? I thought it was just a larger mouth for sales purposes, like the 90 sales were down so they opened it up a little more to get back on the market.....

Mike TexaSS

iTrader: (2)

We did a GTO that has seen as much as 23 psi with a fast 92mm.

OneMean01

iTrader: (6)

I have mine at 18psi and the occansional 20psi and holding up I just have the fast 90 intake and only thing we did was thread some of the holes so it didnt blow the lines out but never have taken it apart or anything just straight out of the box. I do have a ls6 intake I'm going to try it out pretty soon to see if there is any differnce just curious to see if the fast is leaking or not. But car runs great with the fast.

98Z28CobraKiller

iTrader: (17)

I think that the biggest concern with the FAST is that it will break/warp due to the pressure/heat and runner to runner contamination due to the intake growing and air getting between the layers. As for differences between the 90 and the 92, the newer 92 has a slightly larger TB opening, comes with better hardware and is made of a slightly harder plastic.

ChevyChad

iTrader: (50)

https://ls1tech.com/forums/forced-in...cs-inside.html

helicoil

iTrader: (104)

Good thread, missed that one. Wonder how the meth will work on that material over time.

AFASTYZFR1

iTrader: (55)

That was my thread and I am glad I got rid of Fast. Car didn't loose power with ls6 and I haven't had any issues. Plus I got cash to spend on other parts

A lot of people run them with boost and don't have issues, but not me.

laughatrice

iTrader: (12)

+1

I blew mine at 16PSI but my car had a tendency to run hot and have quite a bit of crankcase pressure which heats up the bottom of the intake above the valley covers. That's where it cracked.

I'm going with a ported LS2 for replacement.

Slowhawk

iTrader: (12)

I've done 18psi but it does swell up a bit.If there is room we use a Victor junior instead.

ls1muscle

iTrader: (16)

We are using the FAST 92 on our 8 second twin turbo LS1 RX7. We were running 24 psi last time out. No problems.

elias_799

iTrader: (8)

^^^ clever idea with the intake manifold

that way the cold side piping does not get heated up by the hot side piping


where is the intercooler ? you got an a2w on the passenger seat ?