Panther427

:grin: This is very exciting. Acording to this site,this person was able to buy a complete motor/trans of one of the protype LS motors that became our beloved LS4. Has pic of the factory set up with the front exhaust running under the cradel, then a pic of what i would like to see for our cars as far as an rear/front exhaust manifold. That mearges the front and rear alot better. Im so excited looking at this pic. We might want to contact him about other parts options. He built this motor toa 383 storker/ 500hp
http://www.fastfieros.com/projects/tomkls1/tomkls1.htm So this must Be the first Pre Gen V8 powered car. TO late guys lol

here is an older press release from GM
2004 SEMA - Vehicles

interesting that we have a hydrolic belt tensioner, and a special baffeled oil pan. thats always good. As i find more web sites ill post on here.

Oh this is very interesting. some photo shots, and a dyno run of rockers +18HP and +16ft-tq
http://www.maxchevy.com/tech/2007/ii_7-rocker-1.html

Some Very good LS4 infot and pics of motor apart
http://www.gmtuners.com/LS4/index.htm

Mels SS

iTrader: (1)

This is awesome!!!!!!

cherrygxp

i want rockers now

Pauls325

iTrader: (1)

i wish he would have taken like sixty more pics and to know where you buy something like that

Panther427

I know i was so giddy to find the pics of the prototype at all.

hexxLS4

iTrader: (1)

how difficult is it to install rockers? I've done a few intakes, that is my level of experience working on the motor. =P

phat_ridegt

iTrader: (1)

rockers are about 8 bolts to get the valve covers off, and 8 bolts for each rocker....if you can do an intake, you can do rockers.

you may have to change pedistals depending on which ones you get....id recommend zzp's modified stockers

StealthV8

iTrader: (1)

How hard is it to get at the ones at the back near the firewall?

TiredGXP

iTrader: (2)

The only ones that are a bit of a problem are the ones under the alternator (I used the Harlan Sharp rockers, so needed to get a torque wrench in there). But since I changed springs and seals at the same time, I had to take the alternator off anyway to get my spring compressor in there.

It was actually more of a pain to pull the plugs so I could get the fitting in there to pressurize the cylinder during valve spring replacement (#8 was the worst).

texasGXP08

Great info. Thanks.

6camaro9

FYI, if you value your money then read this thread.
http://www.fiero.nl/forum/Forum1/HTML/071221.html

1BADCTS

iTrader: (17)

Is that the belt tensioner below the alternator?