jcob

i have basicly a stock ls1, 241 heads milled .030, a .040 head gasket, and a comp cam part # 54-459-11,
lift .617/.624
113 lobe sep
231/239 duration

has anyone run this camshaft before, or does anyone know if the pistons need to be flycut?

Johnnypappis

Safety is the best policy my freind measure PTV Clearence....better safe then sorry and your pulling the heads off anyway.

jcob

the whole engine is at the machine shop getting the crank turned right now anyway. how much would you recommend cutting?

jcob

any help while its still at the machine shop would be nice

Intercooler2

iTrader: (24)

If it's at the shop have them do it while there. They should know how much to cut to make it safe.

Sales4@Texas-Speed

iTrader: (4)

I think it need to be cut. If it wasn't it would be very close. That is a decent sized cam with heads milled .030 and a .040 gasket, a noticeable amount of clearance is being lost there.

jcob

Thanks for the help, think .080 on the intake and .100 exhaust will be fine on stock pistons?

Intercooler2

iTrader: (24)

Yup. Both mine are cut .90

slt200mph

iTrader: (42)

You WILL have to fly cut with that set up...

260B4U

iTrader: (4)

if you have to ask..99.9% chance you have to cut

jcob

Had to just fly cut the intake to .050. The exhaust had about .200 clearance