What are the differences between the LS4

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Nov 12, 2006 | 08:00 PM

#21

RacerX11

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The biggest obstacle I see to using the LS4 in a RWD application is the starter. The FWD GM bellhousing does not allow the use of a large diameter flywheel, so I am pretty sure you cannot use a traditional block-mounted starter. The LS4 uses a transmission mounted starter with the 4T65. Unless you can do the same thing with the RWD transmission, you would need to rig up something else, like mounting the starter under the oilpan.

Nov 12, 2006 | 08:30 PM

#22

FIEROPHREK

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Here is a pic of my LS4's bellhousing. Quite differant from an LS1's .
https://ls1tech.com/forums/attachmen...id=79999&stc=1

Attached Thumbnails

What are the differences between the LS4-ls4-bellhousing-01.jpg

Nov 12, 2006 | 09:46 PM

#23

RacerX11

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Quote:

Originally Posted by FIEROPHREK

Here is a pic of my LS4's bellhousing. Quite differant from an LS1's .

I already stole your pic from the Fiero forum and posted above

Nov 12, 2006 | 10:05 PM

#24

FIEROPHREK

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Quote:

Originally Posted by RacerX11

I already stole your pic from the Fiero forum and posted above

SWEEEET

Nov 13, 2006 | 11:14 AM

#25

BADDLS1SS

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From: Slinger WI

Quote:

Originally Posted by FIEROPHREK

Here is a pic of my LS4's bellhousing. Quite differant from an LS1's .
https://ls1tech.com/forums/attachmen...id=79999&stc=1

Nice.. well at least all the "nomal" bell housing bolts arent even drilled and tapped.

So much for anyone just "bolting in" anything larger, like a LS2... it wont have any of the right holes. Ghay

Oct 17, 2009 | 12:59 PM

#26

ddcarter

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From: Emporia KS

Quote:

Originally Posted by RacerX11

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

Don't the v6 4L60E have less clutches in the clutch packs?

Oct 17, 2009 | 10:31 PM

#27

JDMC5

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From: Highland, MI

Quote:

Originally Posted by 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.

don't forget the heads use a smaller intake valve than on the LS6.

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