Cop Car

iTrader: (14)

ok i spent 30 minutes searching all over and i never found information.

since the L92 heads are a diffrent angle, what kind of forged pistons do you need to run on a 4.00 inch bore motor.. and where can i find these expensive parts?

Stang's Bane

iTrader: (22)

Someone correct me if I am wrong, but th L-92's are the same 15 deg as the LS1's. The LS7s are on a 12 deg though. The difference is the 2.16 intake valve. At this time it looks like a custom piston. I am sure Dieamond could make you a set. Maybe you could talk to TSP and find out where they get them from.

fast98

iTrader: (16)

ya there not at a different angle just the intake valve is bigger and its offset

skipperbisket

iTrader: (4)

you are wrong...

garrettpen

so than what angle are they?

DoesSpeedTurnUon

iTrader: (17)

Mine has 4.005 JE pistons -5cc

1ImperialSS

iTrader: (5)

mine will have 4.003 -4cc mahle pistons. been told my richard@WCCH that it should work fine.

racer7088

Th L92 reliefs are different with a much larger intake valve and wider valve spacing. I have recut several and with no cylinder head milling and certain cams you still might get away with a regular piston anyway but they definitely will hit earlier and on the outer edges of the OEM reliefs when they do.

racer7088

I am doing some batches of L92 flat tops for the 4.100 and the 4.00 strokes and with some semi fancy ring packages to make it all even better.

TWINK

iTrader: (10)

My set up is 4.000 with JE Flat top pistons w -2cc valve reliefs. will this be ok with the l92 head's with stock valves.

my cam specs is 248/258 .647/.647 112

Let me know what you think.

racer7088

I don't know how big the JE reliefs are either radially or depth-wise?

Hopefully it will work for you but I would check first with the fairly big cam..

Mr.MartyStone

iTrader: (12)

how is he wrong? LS1 and L-92 both share 15 degree valve angles.

Jason 98 TA

iTrader: (4)

What stroke are you building? I have 4.010" pistons with l92 valve reliefs in stock. We ship all our strokers with l92 friendly pistons now

Cop Car

iTrader: (14)

i just picked up my 6.0, and id like to just use the stock bore/stroke. stock crank, forged pistons and rods. id love to do some L92 heads but i already have a set of 243s right now, and id like to build my bottom end once.

TWINK

iTrader: (10)

4.030 post up or pm me a price on a set of pistons.

Thank's

TNTramair

iTrader: (15)

so the 402 i just got from you with the -15cc diamonds should be fine with the l92s??

SUTTERERMAN85

iTrader: (42)

i could use a price also on these.

WizeAss

iTrader: (5)

what are the odds that the combo you are doing for me will be the first f-body with an more aggressive cam, L92 heads, and L76 intake on the street????

I hope to be on the road in February!

racer7088

Well I am doing two but they are much more radical.

My L92 pistons are in 4.070 or 4.075 bore and have 1.2, 1.5, 3.0mm rings and will be a normal price but the rings are much better than what other people have.

skipperbisket

iTrader: (4)

Erik, why the .070" bore? is that as "small" as you feel comfortable with running these big intake valves? might have to get a set of those off you soon when i come get that block. for stock stroke ofcourse (strokers are for pussies!!!!!)