dirt track racer 81

iTrader: (45)

Well I figured I'd post this and get some more opinions..I ordered some H-beam Rods and -4cc Mahle Pistons tonight.. gonna have the block tore down either tonight or tomarrow night and get it sent to be bored..gonna have them go ahead and put some cam bearings in it. im just going to get some clevite bearings from one of the sponsors..

One thing I do need to decide on it what thickness of head gasket do i need? I was thinking of cometic .030, it would give me a 10.6:1 compression ratio..would it hurt to go ahead and have my heads milled? they are 241 ls1 heads with a 67cc chamber..how much could i mill them and still retain the 7.4 pushrods?

Phantom

iTrader: (16)

finally

dirt track racer 81

iTrader: (45)

you had me worried at the track the other day..once you get the stall and 4.10s in you would hammering the nails in the coffin..so i cant let that happen just yet haha..i might need a bigger shot on down the road

Phantom

iTrader: (16)

i wondered if that had anything to do with it

i'm ready to see your tru run like its capable of finally

dirt track racer 81

iTrader: (45)

haha naw..i was kinda pissed it went from 382 to 317 and dewayne kept on tryin to come up with all these excuses why it could be somethin else..and to run a lower trap speed..the time dropped from actually gettin off line..

anyways still need some answers or im just gonna get .030 gaskets and not have them milled because i dont know how much

BlackGMC

iTrader: (31)

I heard it was better to run a thicker head gasket and mill the head rather than thinner gasket and not mill the heads..... Maybe some experts will chime in...

Wilde Racing

iTrader: (26)

You need to figure out were your pistons are going to be at tdc. Use your head gaskets to obtain the 'quench' you are looking for. I would check the heads and deck for flatness. Then machine as needed. Don't forget to replace all tty bolts!

dirt track racer 81

iTrader: (45)

i already had arp heads bolts im just going to reuse them..can you explain quench more or have a link to it?

Wilde Racing

iTrader: (26)

In a nutshell, it is the distance from the top of the piston to the flat of the head. Depending on pistons, heads, and PVC, you want it in the 35 thousands range. If it is to big, you will have detonation, if it is to small the piston may rock and contact the head... got to LS1tech type "Quench" and spend the next ten hours sifting through a ton of info.....

dirt track racer 81

iTrader: (45)

do you know how much the piston sticks out on a 6.0 block or is this something i need to wait and get my motor put together and stick my dial indicator on it? also how does you cam come into play with this..still doin some reading too