Do you think there is a performance advantage using a "Fast" manifold over having a stock one ported. The difference is $800.Seems like alot for possibly just a few more Hp.

 

i didnt have the ported stock but when i put a ported fast on it was amazing. 30 more hp and tq at peak and higher in mid range it pulls from every rpm range. its the best mod i did

 

Was that just the intake and no other changes, or did the car already have headers and a CAI?

 

Yeah, it's worth it. Here is my before and after, stock FAST vs my ported Stock intake. Also ran .1 and over 1 mph quicker in the 1/8th mile.

 

So, it looks like you picked up 15 hp at peak with the Fast over the ported stocker.

How much of a gain did you see from the ported intake over the unported?

 

i had all mods that i have in sig the car was dynoed before the fast was installed and after same day. that was with the ported fast and ported TB at Cartek. it doesnt matter if i step on it at any speed it pulls down low up top

 

Here you go:

 

4hp/6tq

Then you got 15hp/21lbft over that.

Total, you saw 19hp and 28 hp.

That's a pretty big gain. Good for you man. That's awesome.

That seems like it'd be worth it, since people like to spend 1000 bucks on a catback that doesn't really give them any HP.

 

Its not a few HP and it isnt about the peak numbers. The FAST manifold mod is the poster boy for the use of the entire curve and the best reason to trow out peak numbers. To debunk the myth, LG motorsports dyno'ed a ported stocker and swaped out to a FAST manifold. Here is the all-you-need-to-know thread and the dyno sheet. It isnt a few HP.

A reprint from the original thread:

ETIMOLOGY and Terminology: An intake is an intake manifold. It is made for flowing air into the runners of the cylinder heads. An air cleaner is not an 'intake'. It is an air cleaner and the system is is part of is an air cleaner assembly.

NEEDED DIALOGUE: This is a reprint from the Craigster05 install. Since Craig saw fit to delete the links to the original thread and make the FAST install DIY thread effectively useless for those that reference it (very selfish of him to care more about his photobucket hygene than DIY threads...factually he is really the source of all the pictures and was involved in all stages of documenting this info. He is one dedicated to this topic as much as me.), I took the time to do this. I know retirement is hard to deal with and I havent had time to do a job search to fill in the in between spaces. Actuallly I dont know if I have the time for a job with all my other activities like going shopping, going to the movies, driving around, and hanging out with my friends....both of them. Well since some of the pictures are gone, it is being reposted in this how to do thread for those who keep bringing up the questions on how to install it.

First for the babies who whine about your warranty: Here is a toy to keep you busy while real men discuss the violation of the powertrain warranty and get some new power:


For the real men who are still with us, the manifold can be modded to eliminate the need to cut the fire wall, buy an extension to relocate the MAF, and there is also no need to buy a fuel rail hold down kit. Those who feel the need to still do any of these things and make life hard, I suggest prozac to help deal with the OCD.

WHY do this Mod?:To the 'not worth it' guys (they are the ones who look at peak HP and think 12 more at peak is the whole story) the manifold delivers about 25rwhp and 25+rwtq in the midband. They think that since the dollar cost average of the peak HP is like 1 dollar for each peak HP that is isnt worth doing this mod. This is where Dennis50nj makes some serious ground up. His car has trap speeds that far out pace the dyno results of the typical bolt on car. Unlike the false religion idols worshiped by nitrous guys with tall gears, this manifold produces godlike power in the midband. I have seen peak numbers over 30rwtq. The launch is where this TQ matters. Dennis launches at the track at 900rpm.....900. A car launching on the track or the street must get through this part of the power band. Roll-on race queens who refuse to go from a dig wont admit the power needed to get through this first gear with real tires. Dennis kills most cars by the end of his first gear. At 4500 on the shift he is well into the meat of this TQ. Here is a dyno graph of the FAST manifold vs a PORTED stock manifold:


The top line is a FAST and the bottom line is a ported stock LS2 manifold. Imagine the difference between bone stock LS2 and a ported FAST. Not sold yet? May I interest you in some Viagra? You need something to wake you up.

Craigster05: It's been a long time coming, but I finally finished the FAST manifold installation. My good friend SpinMonster did the modification, porting and painting for me. We put it in the other night, it replaced a ported LS2 intake I had. All I can say is WOW !!!

The extra TQ and HP (in the midband especially) has really unleashed my car to the point I had to learn how to launch it all over again....from a roll it's simply amazing. The throttle response is super crisp and quick, and it fits and looks like stock

Spin, I cant thank you enough for all your help, guidance, hard work...and most importantly your friendship! Thanks, Buddy!

For anyone even remotely considering this mod, don't hesitate. The car is a completel new animal all over again....just ask Cameron...

Here are some pics to see the process.

The modded manifold prior to installation:

This is the cut on the back of the manifold which is where it touches the firewall:


A plastic piece is glued in place using the PURPLE bottle glue marketed under the name Goop which is purchased in Home Depot in the adhesives dept. The plastic is from a black project case I bought from radio shack but use your imagination here. If you were one of those kids in 5th grade that just sat there waiting for an idea to come to mind when the teacher asked you to write a paper, please go to radio shack and use my idea. Its original even though not your original idea. This is the piece glued in:

Note the highlighted orange trace showing that the original lip on the top cover of the manifold wasnt cut off. Go slow with the dremel.

The manifold put back together:

IN this picture you see the relocated air fitting in the back. When you go to home depot go to the power tool section and look for air hose fitting like this one. Seal it on the inside with some of the purple Goop you bought.




The manifold is sealed around the perimeter with a gasket that is formed from orange RTV silicone. Do not call FAST/Comp for a new gasket. Buy the orange (or gold sensor safe version with no smell) and fill in the channel 1/2 way full with it and let it dry for a day before install.

Taking out the original



Swaping parts:




This picture shows the fuel rail back on the manifold. The LS2 fuel rail doenst line up with the mounting hles for the LS1 which is what the FAST was designed for. Use oversized 1/2 inch diameter washers to hold the rails down.


Cleaned up and ready for the transplant







Installed, running and looking great! Note the fuel rails fitting fine busting myth number 54823784.





http://forums.corvetteforum.com/show...inmonster+FAST

 

Question about the relocated air fitting on the back. Did you put a different size on there? I noticed when I installed mine it wasn't as tight as the factory fitting so I used a hose clamp, which I guess is one way but is that why you did that?

 

Yes, hose clamp. Works great.

 

Cool just double checking. I was working on it late trying to get it going for the morning and you should of seen the ideas I was thinking up. It was horendous. I was planning on finding a pipe that fit the FAST then putting an adapter on to the factory vacuum line. I finally realized I could use a hose clamp and after that I realized it was time for bed lol

IDK if you read another recent thread of mine but I had the epoxy that this one company used to make the FAST fit fail. I assume it wasn't high enough temp and got so hot that is it cooled down it cracked. I sent it back to them so they can fix it which was probably a mistake because I probably could of fixed it by now but what epoxy do you recommend?

 

Yes

 

Oh yea. The FAST intake is standard with the LPE 403 packate for good reason...it works.

Good info by SpinMonster.

 

That was highly entertaining, as is most articles or posts about FAST on the LS2 or mythbusters type posts.

I'm not up on the details of the stock LS3 intake manifold. Does it also leave some room to be desired (I know it doesn't leak like vibration welded LS2 stocker) in terms of performance, and is there an LS3 manifold in the works by this vendor?

 

Its seems like you guys make a good point. Q. SHould the fast manifold be ported too?

 

Yes, FAST for the LS3 is due sometime in July (as is the Weiand Street Warrior). It will be interesting to see the final products, the LS3 manifold already flows much better than the LS2, especially with a Cory Harris porting job.

 

My C6 A6 cammed, ARH, etc. coupe just had a SPINFAST 92 installed by Spin yesterday and the increase in torque/hp is fantastic.
I thought I had some torque before (w/a ported stocker)but after SPIN installed his SPINFAST 92 my Vette is now a Torquemonster (apologies to Spin).
Thanks, Spin my C6 is now a definitely an A ticket ride, Rocket ship.

 

For best gains, yes.

 

Since I have totally blown my budget to ****, I have to keep the ported LS2 intake that I have, but for future reference, I am wondering if anyone has measured the gains from a (ported or not ) LS2 to a FAST intake with a Centrifugal supercharger. I am putting an A&A Vortech Ysi supercharger on my new 403 within the next month and would like to know if the FAST might be a future option for me.