Stampede4ever

and the LS2? Besides the bore Dia.

Thanks.

Stang's Bane

iTrader: (22)

If I am not mistaken the block is actually shorter, different stroke(?). Not real sure about the last one. Different cam, intake etc.

Mike's 01WS6

iTrader: (4)

Crank is machined down on the ends and the accessory drive is more compact.

BigMikeGXP

^^^ that and the LS4 has lower rpm rated LS1 type valve springs. Those are the most notable differences.

Stampede4ever

So, the heads and cam are the same?

Thanks.

BigMikeGXP

Yes... the heads are the same (LS6), however as I mentioned the valve springs are the older LS1 type instead of the higher rpm rated springs that the LS2 gets.

No... the cam is different. It is a dual-pattern (sorta)... DoD valves get a .492 lift... non-DoD valves get a .482 lift. It is more comparable to the cam in the LH6 truck engine which has .492 lift on all the valves.

Everything is listed here except the cams specs.


The LS1tech database was acting weird when I first posted... I couldn't tell if it actually made it in there... so I reposted it.

Stampede4ever

Thank you.

MattSEG

Can it still mount to a t-56? Still has 6-bolt mains? Are the internals worth a damn?

BigMikeGXP

It is a normal LS type motor. Nearly everything on the LS4 is comparable to the LS2.

jfman

iTrader: (6)

So we can mount these on a rear wheel drive vehicle ?

FIEROPHREK

Only if you use a longitudinal tranny that has the same bolt pattern as Gm's front wheel drive transmissions. A tranny from a 3800 powered F-body should work. . . in theory .If your gonna do that then why not just get a LS1, LS2,LS6, LS7. Those motors are probably way more plentiful than a LS4. Just my .02 .

jfman

iTrader: (6)

So a tranny from a 3.8 camaro will not bolt onto a ls1 motor ?

Kazmaniac

To the best of my knowledge GM uses the 4L60E tranny in the F-Body. This trans is behind the V8 and the V6.

FIEROPHREK

If this is the case then the 3800 in the camaro/firebird has a differant bolt pattern then the 3800's in the FWD cars. The LS4 is bolted to the 4t65e ,which is used in GM FWD vehicles,So it has a differant bolt pattern than a normal LS1, LS2 . . .

ChipC

The 4T65e's used in the LS4 cars have a different case than the 4T65e's used in the v6 cars. GM used quite a bit of the LSx pieces with the LS4. It seems logical that if they went to the trouble of using a unique tranny case, they would keep LSx bolt pattern. But then again, GM does some odd things on occasion.

Chip

RacerX11

The LS4 uses the FWD GM metric bellhousing bolt pattern. It will not bolt to a T56.

RacerX11

The 3800 4l60E has a different bellhousing than the ones used for V8's.

evrae205

so doesn't that mean you could just swap the bell housings?

RacerX11

Possible...I am not familiar with differences between the V8 and V6 versions of the transmission besides the bellhousings.

jfman

iTrader: (6)

Only one way to find out