jt76

iTrader: (10)

Which would be the better of the two? I am in the process of selling my Fast 90/90 to a friend and i want to pick up a "one piece" intake to use with my build. I know the LS2 can accommodate a 90mm tb, but i am unsure as to which intake is "better".

02blackbeauty19

iTrader: (22)

Fwiw, I sold my ported FAST setup for an LS2 and at just under 14 psi, I made 768/690....and will turn it up a little in the next few weeks!

jt76

iTrader: (10)

nice numbers,

anyone else have input?

XtremeDime

iTrader: (16)

Whichever you can get cheaper lol, I believe the flow #s are comparative if not the ls6 flowing a little better.

IT_SS

iTrader: (5)

my understanding is LS6 > LS2, LS6 < Ported LS2

98Z28CobraKiller

iTrader: (17)

I'm pretty sure that the LS2 is not a one piece intake and can seperate internally and bleed cyl to cyl under boost.

396375

iTrader: (10)

A lot of guys are making 800+rwhp with an LS2 and no issues.The same goes for the LS6 but the larger throttle body of the LS2 is an advantage.LS2 are also cheap with the larger throttle body.

jt76

iTrader: (10)

Really? i was under the impression that factory GM intakes were one piece.

jt76

iTrader: (10)

yes but which intake is "better" that is what i am looking for, i need help forming a decision as to which one i should buy. I guess i was looking for this thread to start some debate.

The Fugitive

iTrader: (6)

Lol okay for arguments sake I will say the LS2 is better. The larger mouth and the ability to do like what was mentioned with the larger throttle body would be great. Then again a vic (super or jr) would be better for equaling out how much air is going into each cyclinder but between LS6 and the LS2 my vote is for the LS2. hey you should start a poll between the two then again I think that it has be done already.

EPP

iTrader: (22)

http://www.exoticperformanceplus.com...Car.php?car=29

Take a look at the before and after results when we replaced the LS2 intake on the above car with a FAST 92mm. I'd have to say the LS6 intake is better than the LS2. Bob

cablebandit

iTrader: (37)

I have a tpis modified Ls6 intake that has a bigger t/b and neck opening....8x+ mm
It has been my favorite intake between ls6,2, and Fast 90

stevieturbo

Either will work fine.

Larger throttle body is of no benefit, as the TB will certainly not be the limiting factor in terms of airflow, for nearly all engines.

Perhaps if making well in excess of 1khp a larger TB may be of benefit.

jt76

iTrader: (10)

I think i will play it safe and go with the LS6.

blacksi

iTrader: (3)

That's what I was thinking, NA flow characteristics make a larger difference, but with FI they are negligable.

VINCE

iTrader: (1)

Just turn up the boost to make up the difference if there is any...

Lawnboy

iTrader: (54)

Check out TPIS , sight.
They tested all the intakes, the LS6 flowes the best , a little better than the LS2, and with there mod, cutting the LS6 75mm neck and epoxing a 90mm neck for a 90mm Tbody
they modded LS6 intake flowes very well,
But IMOP with the the boost i wouldnt cut/glue any intake.

if you have a 75 mm stock throttle body get a LS6, if you want 90mm stuff get a LS2, in the end it will be so close

I am running a LS6 , when i measured my LS6 intake mouth i came up with 75.5-76 mm and my stock Throttle body was only about 74mm, so i bought the accufab LS1 polished 76mm T-body , nice combo matches up pefect, & looks and works great.

In the end with a D1-sc pushing through 4.5" twins @ 15 psi ,LS6 block TR 215/230 blower cam AS speed 1X blower heads, custome twin (7GPH nozzles) Progressive Methanol injection system and custome PCV system (By Me) 776/697 uncorected and 741/669 SAE corected. on a SD tune , IAT temps stood at 66degs to 6,500 at only 17degs timming,
through FLP 1.75 long tubes and single SLP SS 3" duel duel exhaust

robert miller

I have a ls2 making over 850 on a mustang dyno. The diff is I am thinking is the ls6 will give you more at lower rpm and the ls2 will be more on the top end. I am at 16psi d/spray of meth. with no problems. Mine is ported by BLOWNBLUEZO6 on here great guy. was 300.00