Coach62

Supposedly porting the stock LS7 intake and TB gains in the neighborhood of 12-15 hp. A FAST gives about 3hp more than that. Does anyone have a dyno printout of before and after porting a stock LS7 intake?

Given the price difference, is there really any reason to spend the extra big bucks for just a few HP? Am I missing something here?

EDIT: What I'm looking for is proof that a ported stock LS7 intake is comparable to a non ported FAST 102 in HP ant TQ gains. I already have heads, cam, headers, CAI and make about 540 RWHP.

My choice is this:
1. Spend $400 to have my stock LS7 intake and TB ported.
2. Spend 3-4 times that amount and get the FAST setup - non ported.

If the porters are telling the truth, there is only 3-4 more HP in the FAST setup vs the ported LS7. $400 for 12 or so HP is a pretty good deal. Compare that with say 15 hp for a FAST setup at $1,000 more and you get my point.

Thanks for any input in advance.

Jawnathin

Don't take my word for it, but I think a FAST will provide more torque in the mid range compared to a ported manifold. It will probably be similar to that of a headers on a non-cammed car. Not much peak gains, but moderate gains in the mid range.

0Anthony @ LGMotorsports

The FAST will gain in both HP and TQ due to the change in runner design. Now porting the stock one may or may not be worth that much, just depends on the tolerance of the intake and how much material would need to be removed to match everything up.

Coach62

I know the FAST will have better gains. I'm just trying to figure out how much those gains differ from the stock ported intake and if the cost difference is justified.

Porters of the stock intake claim gains of not much less than a stock, unported FAST. If that is true, the cost of porting a stock unit is MUCH less all considered.

So I guess my real question is - has anyone had a professionally ported LS7 intake, with before and after dyno testing?

Rupert pupkin

The avg peak gain in HP I've seen is typically 5-10..maybe 15 max. In terms of trq 10-20 throughout the trq band. Max #s typically with porting of the Fast 102.

Here's a good read when I was in your position. Post #31/45 will have the dyno graphs if you don't like reading.
http://forums.corvetteforum.com/c6-z...results-3.html


I'm porting my intake. If you're trying to get MAX effort, max out your #s, then of course upgrade everything. Dollar/power is not economical IMO.

Check out Nick Williams Tb too..550 for that bad boy and supposedly nets you 5 ponies..

ramairws6

This should help ya....
http://ls1tech.com/forums/dynamomete...e-results.html

Coach62

Good info, but I'd really like to see a before and after dyno of a well ported stock LS7 intake.

Rupert pupkin

There is before/after......http://i74.photobucket.com/albums/i2...ortedls7-1.png

spra4u

If you plan to stay NA then I would say just do it. Although, if you are going to look at every mods the way you are (hp vs $) then guess what, no mods really make sense. Get a tune and move on. More hp is directly related to how much you want to spend. I have AR LT headers, catted x pipe, fast 102 intake, NW 102 TB, and a Vararam CAI. Made 505 RWHP ON a proven not so happy dyno here in Naples. I know there is a lot of factors on this but there you have it. Just my .02 cents.

Coach62

That appears to be a ported LS7 vs a FAST. I was looking for non ported vs ported LS7 intake. Porters CLAIM 12 HP or so, but I'd like to see proof before investing the $$

Coach62

I already have heads, cam, headers and CAI. I make about 540 RWHP. I'm going to do one or the other, but don't know if the extra few HP are worth the thousand dollars or so.

0Anthony @ LGMotorsports

Remember a few things.

You are going to have to look at the entire curve...not just peak numbers on this.

Remember there is a bit of an error factor in the dyno itself.

Lastly both intakes are plastic...like I said in the first post it depends on tolerances.

Since the OEM intake is mass produced (as well as the FAST) and you have head modifications done a lot of the 'porting' gains you probably will see is how well the intake lines up with the ports on the heads. If the do not line up you can build a lot of turbulence there so one intake may show more gains than the other. At the same time it depends on how well the intake itself lines up when they put it together. One huge benefit of the FAST is the ability to take it apart and make sure the runners all line up with the head ports and each other so you can maximize flow through the entire intake system.

So I still stand by my original statement that a FAST will produce more...ported or not. Seeing what one person makes vs another on a ported stock is not as consistent.

LS7 BUD

Where are you buying your Fast 102..? $1000 is over priced... Bought mine for $850 flat brand new...

JUSTAC6

I believe most ported fast 102s are 1k... but don't you have to buy extra things to make it "bolt on"?

Michael_D

I'm gunna have to call BS on these claims that you can get HP gains by porting a stock intake. Have you ever seen a stock intake, off the engine?? Just what exactly do these "porters" do to the stock intake?? There isn't shiit for material to mess with and you can't disassemble the silly thing, so just what do they DO?

spra4u

Its all in the tune.

Rupert pupkin

Then 1 can assume judging by the numbers, if the fast is not ported then the #s would be lower. How much lower? It'll depend on multiple factors.

KLLRVET

I gained NOTHING from a ported stock intake.

http://forums.corvetteforum.com/c6-z...s-it-work.html

Coach62

Thanks Anthony, that was very helpful, but I don't see a before and after dyno with the stock vs ported OEM LS7 intake??

It sounds like the FAST is the way to go. Were you happy with Justin? Last time I called him his VM message said that he wasn't taking on any new work due to a long backlog. BUMMER! Good for him, bad for us.

Coach62

I didn't really mean that number to be spot on accurate. As you know there are other expenses when going with the FAST, such as fuel rails.