badazz81z28

iTrader: (6)

Well the FAST is no good if you choke it with the stock TB...Theres nothing to gain really from a FAST 78 for the $$.

$1200 is what a new FAST 92/92 would cost, you could easily get that for a grand or less now.

2win_SS

iTrader: (1)

^^^ whata u mean choke the FAST? the stock TB is 78. And like I said I can port my FAST78. can u port your LS6 and see gains?

badazz81z28

iTrader: (6)

Stock Throttle body is 75mm. Yes you can port the FAST 78, but its not worth the cost when you pay $500 for it and than pay to port it. Might as well get the 92mm!

People on here say there isnt much to gain from porting the LS6. Doesnt mean you can't.

2win_SS

iTrader: (1)

Like I said. Ported FAST78 plus PPTB is $700. FAST92 set up is $1200... If you dnt have a H/C/I setup then a 92 wnt gain that much... Only when you have decent cam will the 92 help gains out... Dude I bought the 78 from put a 92 on his 2002 SS and only picked up 5rwhp... I wouldn't pay $500 more for 5rwhp... Not worth it

'02 WS6

iTrader: (73)

Yes, TPIS has been doing it for a while

'02 WS6

iTrader: (73)

Lots of factors like retune, different dynos, different days etc etc play into that difference. There most certainly is a difference between the 78 and 92 to justify the price difference.

badazz81z28

iTrader: (6)

Seems the question these days is "who hasnt done H/C swap"

Seem like everyone here has done it or is doing it now. The 78mm FAST is no longer sold for good reason. The only FAST 78 combo I have seen for sale is the one on Ebay right now or $900+ (yea right! lol)

reeperz28

iTrader: (1)

I ended out paying for a used fast ported painted black red lettering 92 tb on it with 30lb injectors for 1250$. Its still hurt spending that much fpr 25 hp.

2win_SS

iTrader: (1)

^^^ if I send a LS6 to TPIS... it's coming back with a 90mm snout... Not a port job. 90snout will gain more than port

badazz81z28

iTrader: (6)

http://www.lingenfelter.com/mm5/merc...egory_Code=C35


Not bad...$350 if you send your intake in....Acording to their Dyno chart only a few HP from the FAST

2win_SS

iTrader: (1)

^^^ many dnt have H/C/I... Ppl who just got ther car or ppl who can't pass smog with H/C/I... Not everyone has done it...

Burken01

iTrader: (88)

many people pushing stock 78mm tb to crazy HP, I dont think a bigger snout is going to make a world of diffrence.

A ported fast78 i heard is just as good as a fast 92...

Supply and demand is what has kept the fast 90/92 up in $$$

IMHO its used and worth %75 of what you paid depending on condition..

2win_SS

iTrader: (1)

^^^ wel here is someone that agrees. 78 can keep up with 92 in some case. But 92 will give you good gains if you have cam... Pat G picked up about 30hp goin from 78maf, 78PPTB and LS6... to the FAST90 NW90 TB and 85mm MAF. He had a cam and full bolt ons

Burken01

iTrader: (88)

but its the same argument if you have pacesetters and y-pipe and go to Kooks and true duals...

Both are long tube headers, both are exhaust set-ups.

yet one will outperform the other, but will cost more $$$

Pacesetter headers with a fast 92 would probably perform almost similar with a ls6 intake but with kooks headers and TD's..

It comes down to what you want to go budget on, and what you wanna spend top dollar on.

2 Stroke Racer

iTrader: (11)

I gained a decent amount, can't remember the numbers, but it was worth it.

2win_SS

iTrader: (1)

^^^ let's see track gains. Or dyno gains...

Blk98Vert

iTrader: (2)

Holy **** people, so much bad info being spread around here. First off regarding the FAST 78. It is a FAST 90 with a different top shell, that's it. You can easily port the snout to 85mm and be about on par with a FAST 90. However, you will not be on par with a 92 because it is a different design all together. Number 2. The TPIS LS6 is a complete waste of money today. Back when the FAST was out and over $1000 brand new it was a sweet deal. But to make it work today you would need to drop around $6 or $700 to get it (you have to buy a TB too). Or you could sell your LS6 and buy a used 90 or 92 for the same money and be way ahead of the TPIS LS6

2 Stroke Racer

iTrader: (11)

I can look up my old numbers, but I do remember picking up hp after porting.
Obviously on the dyno.

2win_SS

iTrader: (1)

^^^ yes... And yess... Like I said. Port snout... ported LS6=garbage.

Mike Morris

iTrader: (55)

You got that right.

I think a little but high but about right

Actually the bigger snout on the 90 is why its worth more power over a 78. Lot of tuners would argue with you that post.


I don't agree. The 92 is a better intake the 78 even ported. And that bigger snout is one reason why.


Agree. The TPIS did show gains due to the snout.