LS2 Intake cutaway:

RevXtreme 1 · 01-13-2009, 11:41 AM

Why the LS2 intake is junk:

Even though the flow #'s are good, the sonic/vibration weld is poor at best and the upper & lower parts are joined by pressing against each other and the leakage between runners is horrendous!

Porting them makes it even worse as the thinner the walls get, the less strength they have to even try to seal. In many spots you can see light shined into the runner next to it they are so bad.

This is why the LS6 still outperforms the LS2 even with the smaller runners & a 75mm snout VS a 90mm.

Go with the FAST 92 if you want an intake that works. This car made 40 rwhp more & 42 rwtq swapping to the FAST 92 over this ported LS2.

navy2kcoupe · 01-13-2009, 12:27 PM

Guys, does the same thing apply to the LS1 engines ?
Just curious in case I ever find myself in a position where I
REALLY hafta spend some money on my Vette

Andy

jcb_njb · 01-13-2009, 01:03 PM

Quote:

Originally Posted by navy2kcoupe

Guys, does the same thing apply to the LS1 engines ?
Just curious in case I ever find myself in a position where I
REALLY hafta spend some money on my Vette

Andy

How about the LS3?

RevXtreme 1 · 01-13-2009, 01:12 PM

Quote:

Originally Posted by jcb_njb

How about the LS3?

LS1 & LS6 intakes are bonded properly, the LS6 being the best performing for a LS1 motor aside from jumping up to a FAST. The heat-soak off the BBK aluminum takes away most of the gains that the improved flow would give.

The LS3 & LS7 intakes are better bonded than the LS2, but still have some leakage issues. No where NEAR the LS2 intake though.

jcb_njb · 01-13-2009, 02:11 PM

Quote:

Originally Posted by RevXtreme 1

LS1 & LS6 intakes are bonded properly, the LS6 being the best performing for a LS1 motor aside from jumping up to a FAST. The heat-soak off the BBK aluminum takes away most of the gains that the improved flow would give.

The LS3 & LS7 intakes are better bonded than the LS2, but still have some leakage issues. No where NEAR the LS2 intake though.

Not being a gearhead (as my friend calls himself), what can be done to correct the leakage of the LS3?

RevXtreme 1 · 01-13-2009, 02:59 PM

Quote:

Originally Posted by jcb_njb

Not being a gearhead (as my friend calls himself), what can be done to correct the leakage of the LS3?

Nothing that will last & be effective (that we have found so far), but it is not bad at all. MUCH improved over the LS2.