I have an 01 ZO6 that I am trying to figure out if getting a fast intake is going to be better horsepower gains than my stock ls6 intake. I am going to port the tb. Just checking to see if it would be worth the money, I have read a lot and everyone has said the ls6 is a good intake, but it's not worth porting. Thanks for the help.

 

What other mods do you have? The FAST will require a different TB.

 

I know some of this doesn't apply, just copied and pasted from another post. Thanks again.

Block honed
new GM pistons/rings & rod bearings
PRC 5.3 stage 2.5 heads
PRC 228r cam
PRC hardened pushrods
PRC dual valve springs
36lb Bosch fuel injectors (installed at 46000 miles)
LS2 timing chain
Centerforce Dual Friction clutch
GM Master cylinder
GM Slave Cylinder
CCA oil catch can
Dynatech powercats
Dynatech stainless LT headers & x-pipe
Borla quad-tip Stingers
Vararam 2B CAI
New NGK plugs (installed at 46000 miles)
GM hot wires (installed at 46000 miles)

 

I've seen a lot of guys post big #s for FAST changes, but I just didn't see that much of a change when I swapped and I have a H/C car. IMO, there are other mods that will give you a better bang for the buck

 

Yes you will get a pretty nice gain from a FAST. I put one on my cam only can and I could feel the difference.

 

I am running a FAST 102 with an LS2 Throttle body. After I installed them I got a tune. You should go to the LS1Tech site and see the dyno graphs for the FAST vs others. It will tell the story. It is a good quality intake and yes it is a little pricey but I like mine. [IMG][/IMG]

 

02 ZO6, Patriot 243 heads, cam, home ported FAST 90, home ported 90mm TB, headers, VARARAM = 450 RWHP. The ported FAST and ported 90mm TB was a stong contribuator to that end result.









BC

 

Thanks for the help. If I bought a fast 90 or 92 what tb would I need? I would like to get the 102mm but I can't really do that right now. Thanks again.

 

Standare LS2 TB but,, you will need to purchase or make an adaptor harness to allow it to work on a C5. It will fit and work fine out of the box but responds very well to porting.

 

It make a big difference up top but thats about all I could feel SOTP wise with the FAST. If you can get one cheap go for it.

 

I am contemplating the same switch. I am at 435rwhp now and would like to see 450 which I think I could do with a ported FAST92. However, I like my lowend and midrange torque and my car very rarely sees over 5500rpm's so I don't know if its worth the expense. I would be interested in seeing a dyno comparison.

 

You will get that easily. My car saw a 10.5 HP rwhp jump going from LS6 to FAST 78 w/ OEM throttle body.

Word of warning, FAST intakes are power makers for sure, but they are **** poor in the quality control and fitment areas. Unless you are having someone install it for you, expect to do a lot of work to get it to fit properly. For the money these things cost, they are a joke as far as fitment goes. They DO NOT just drop in.

Another tip would be to buy the MAP sensor relocation kit, the FAST intake doesn't have a tab to hold it down and it just flops around unless you silicone it in. Its supposed to be fine but it is VERY suspect. Also - The OEM LS1 PCV system is a hassle with the FAST, for anyone with a LS1, you should go w/ the LS6 PCV set up.

Also, lots of folks have reported that in order to get the 102 to fit the C5, they have had to shim the front cradle, which is insane.

They are also noisy, and are prone to whistling. I personally would NEVER buy another FAST intake. I would have my LS6 intake ported.

You dont have to take my word for it - do your own research. It does look nice though.

 

Im working on putting in a Fast 78 now and like you said this thing is not just dropping in I have had to modify a few things already to make it work and still not getting a good fit between the back and the firewall its so tight Im skeptical something is going to wear with the motor rocking, the pcv hoses are to bulky and run behind the intake.

 

What problems were you having with the LS1 PCV system. I have a FAST 78 to install on my 00 and haven't heard anything like that before so now I am curious as to what else I need to do.

 

The issue I am having with the hoses that connect to the valve covers and run behind the intake manifold it just doesn't seem like there is enough room back there with the fast its really tight I can get it in to position but seems like having it cramped up against the fire wall could cause some wear issues over time with the motor shaking.

 

sounds like the excuse I need to get that 04 LS6 valley cover now.

 

I thought about the Fast intake until a car club buddy told me the hassle he had installing his. Like they said,its a nice setup,good results and sets off the engine bay. Its amazing that it doesnt just set in like the LS6 intake. I do know that porting the LS6 will give similar results.

 

I have a home ported FAST 90 on my 02 ZO6 and I couldn't be happier. I had ZERO fitment issues. Of course, I do not have the PCV hoses that you have. Like baxsom stated, getting the updated valley cover with the improved PVC system is a very good up-grade.

You have a couple options to help it fit better:

-Lengthen the rubber hoses on your PCV set up so it fits further back and can tuck in better.

Here is your current set up:



Here is what a late model set up looks like without all that PCV pluming:

New style valley cover:







NO PCV HOSES!






The new PCV hose and fittings attach near the front of the manifold:



MAP Relocation Kit:



BC

 

I only saw a 5hp gain going to a ported FAST 90 over my ported LS6 78mm when I was at 423whp. If you want OEM fit and look and think you need a 90mm TB send the LS6 mani to TPIS for their 90mm snout conversion for $350.

 

good flowing heads need better flowing intake than the LS6. Usually, if your wanting to make over 460 rwhp on stock cubes all motor, you'll need a FAST. Best results are Tony Mamo's ported FASTs. Crazy power up top, you'll lose just a tad down low.