A cam swap is more than 400 bucks to do it right. Cam, spring kit, pushrods, timing chain, tune, + gaskests, is closer to 1000 for most of us.

I also noticed that those of you that are seeing the biggest gains w/ the FAST are doing so with larger cube motors.

Tony are you saying that your AFR's ($2300 good heads I'm assuming) will give 20 more hp than a 1300 set of TSP LS6's? I was under the impression that your heads will give a little bit better peak #'s but do much better low end.

 

I now see that Tony has a disclaimer for labor. Cost per hp would still be about 25-40 depending if you do it yourself or not. Good point though.

 

When porting a FAST intake for more air flow. Are you also shortening each internal intake runner?

 

I think one problem that people have with paying the much money for a Fast intake is, its just plastic. But after you get past that part and start to consider that plastic is superior material for this application. The fact that it’s able to be ported and lightweight with it being a good engineering design from inception. I would think that there would be a large market for a similar plastic manifold that would flow to 7000 or beyond rpm with basically the same list price. I think that more direct competitions with a similar design would drive the price down as well. Right now Fast seems to have the corner on the market, and if I were them I would also try to make as much money as the market would bear.

 

If I was at that HP level with those mods I would spend my money else where
as well LOL. I would bet you are the only one on this board running an LS6 intake making 500 rwhp N\A!

 

Oh I dont disagree at all with you on this one. My point is that there are other things to look at before changing out the manifold and spending that sort of cash.
At the levels I'm at now (Corvette ZO6) I need to lok at putting money in the clutch and rearend before going back up front.

 

I doubt that but it took more money than I actually wanted to spend originally. Things tend to snowball with me, my favorite phrase is "well as long as I'm in here"

 

Doesn't the FAST intake start to loose its peak power gains around 6300 rpms or so? I thought I read that somewhere but I may be wrong. If that is the case, then what should us guys running the TRex cam, or an MS3 or similar sized cam that makes its power at 6300rpms or above run? Would the FAST still be beneficial even if it starts to drop off around our cam's peak ability?

 

I think because the FAST is an $800 piece of plastic more wives tales are made up about it so the guys that dont want to spend the money can sleep at night. Seems the FAST intake is like the Rodney Dangerfield of LS performance mods....it gets no respect

Its one of the few mods I have done that consistantly performs....whether out of the box or ported. I have tested these intakes in 6 figure controlled dyno cells and the results are always the same. It seems this is the most mis-understood bolt on and for the life of me I just don't understand why. The guys that are making the BIG power are running the FAST and the guys that are making big power without it should be cause there's alot more you left under the table. Have any of you guys seen one post claiming they lost power or didn't gain much from the addition of the FAST? Geeez....Comp should be paying me a commision here with all the free advertising I do for them.

Also, lets not turn this thread into something it's not (regarding a post a little earlier). This was just meant to be a fun exercise trying to enlighten you guys on what you really spend for the horsepower gained....and no matter how you slice it, it aint cheap. For the most part (barring the few "bargains" like cam install and nitrous) the additional power you seek (per dollar spent) isn't dramatically different all things considered. It really comes down to how deep in your pocket you want to reach. Wanna make even more power??....now it starts to get really expensive.

Pat G. has an excellent gragh perhaps he can post here showing nothing but gains and no letting up all the way to redline (addressing the original poster's question of the gains dropping off at high RPM). I will PM him a link to this post in the event he hasn't seen it already. I'm about all typed out trying to lead some horses to water....pun intended.

Later,
Tony

 

18whp, 10wtq from a ported fast here, from LS6. I think they are a great piece period. Very costly in the scheme of things, but nice icing on the cake.

Brandon

 

Good post Tony but I HIGHLY doubt the AFR 205's being 20rwhp better than the CNC Ls6 heads.... I think we will find out soon though, TSP has promised a back to back comparison open to anyone to witness.....

 

I though that back to back comparision was going to happen a few weeks ago?????? I remember a bit over a year ago TEA was going to do the same thing. Never ever heard about those results. I suspect it will be the same in this situation.

But hey,to validate results, I would suggest a non partial tester to actually do the comparision. It only makes sense, nobody can cry about it if they only have one dog in the hunt!

 

Im with ya! I just dont think either AFR or TSP can makes claims that are not backed up by back to back comparisons. Im going to bug the hell out of the sponsers until someone does it....

 

Almost every 422 package that mti churned out a few years ago as running the ls6 intake. I happen to know a guy that had one of those packages w/ ls6 intake, a rather smallish cam, ported 5.3 heads(stage 2 i believe), and 1 3/4 headers, midlength. He put down around 530. Switched to a fast 90 setup, a big cam, and 1 7/8 Kooks. He didn't gain but about 15 rwhp. I believe his heads werer holding him back from even bigger gains. But also he was almost at the upper limits of the fast also.

 

Normally, a non-ported FAST show either no gain down low or a slight loss down low. The velocity-porting that Tony Mamo does addresses the low-speed velocity issues witht the stock FAST and makes the airspeed much better entering the head.

People who don't gain much with the addition of the FAST 90/90 over an LS6 intake and ported TB are most likely not running very good cylinder heads for their combinations. Again, check out my graph and notice the robust gains in power even at lower rpm. The Mamo ported FAST was money well spent in my opinion. Remember, no compromises!

 

Yeah man, stay on them.

 

Good Info Here....

 

Yea sure is... I honestly rather get nitrous for the price though, i just have way to justify it!

So... ported FAST, what about a ported LS6? Is it possible?

 

Possible, but not practical. The choke point for the LS6 intake is the smaller 78mm opening, not the runners. This is why the TPIS LS6 intake with the 90mm oval opening makes power close to a FAST 90.

 

I think that it is more than worth it to do the fast 90/90. You can say its a waste of $1000 plus, but i sold my ls6 intake for 350 and then my bbk t/b for another 250. Now that is 600 i have towards the fast i just bought. I also got a group purchase deal on the fast 90/ ptm 90 t/b for $1000 from texas-speed. So i spent 400 for a fast 90/90