20sickss00

iTrader: (19)

Got an LS6 for the car and had my stock tb ported/polished before i put the two on my car, first, what is the intlet size on the front of the ls6 intake? Is it worth getting an aftermarket tb to put on rather than my ported stock tb? Would i see any difference? Can I put an 85mm tb on the intake? Car is full bolt on but will be getting a set of heads and cam this winter if all goes well.

garygnu

the ls6 intake inlet is only 78mm,not worth it to get a bigger TB.consider a BBK intake and a 85mmTB.

PowerShift408

iTrader: (44)

Just port the stocker, that's all you need.

Damian

iTrader: (89)

Yep...

Bo White

iTrader: (59)

Yep, +1

Joshiedoom

iTrader: (4)

Yep +2

Jon@Texas-Speed

iTrader: (18)

Don't waste your money on an aftermarket TB. Stick with the ported stock one and you'll be fine. Spend the money elsewhere.

Jon

libertyforall1776

iTrader: (2)

Here's 7 HP/8 ft LBs TQ in the FAST 78-mm TB (The GM Performance Parts LS1 test engine was equipped with a factory LS6 intake manifold, a Lunati Voodoo cam, and a set of Hooker long-tube headers.):

HP:

Stock LS1 TB: 442 hp @ 5,800 rpm
FAST 78-mm TB: 447 hp @ 5,800 rpm
Largest Gains: 7 hp @ 5,600 rpm

TQ:

Stock LS1 TB: 440 ft-lbs @ 4,800 rpm
FAST TB: 445 ft-lbs @ 4,900 rpm
Largest Gains: 8 ft-lbs 5,000 rpm

Bo White

iTrader: (59)

Heres stock TB compared to ported stock TB:
7hp/7ftlbs with a stock car down to the paper filter


9hp/8ftlbs with a cam/headers car

rabbit320

iTrader: (11)

whats the diameter of a stock tb?

Mike Morris

iTrader: (55)

wow!!!

bayer-z28

iTrader: (14)

76mm, IIRC.

I think the ported stocker/LS6 is fine for a bolt on car.. I think it's choking my h/c setup. I could prolly stand to gain about 10hp with a FAST 90 setup... Prolly 30 with that and better heads.

Tobias05

iTrader: (1)

another vote for a ported stocker.

Bo White

iTrader: (59)

75mm

Blk_Ws6

iTrader: (4)

i never knew this , what did you guys port your tb with.

bene

iTrader: (16)

This thread itself should be a sticky for the newbies to read.

Steve Gunn

x1,000,000,000 on a ported stocker.
Do a search, there's dozens of writeups.

20sickss00

iTrader: (19)

thanks for the replys guys, I already have my stock tb ported so i'll be sticking with that until the h/c setup

River City Speed

iTrader: (3)

Any advantage using a FAST 78 over a ported stock TB? I have both. I was going to run the stock one but after putting the 78 on I like the bling. My motor swap came with the ported stock TB. My rational is to use it since I have it.

PowerShift408

iTrader: (44)

They are equal in power gains assuming that the stocker was properly ported. Since you have both, keep whichever one you prefer and sell the other. If you're partial to the bling, then by all means roll with it.