Well it seems like everyone in the world wants more than a 190cc port on a 383 but Dwayne and who he pimps for. I guess the trend even in OEM's to get more port volume in there than they have is the wrong way to go. Must be that the guy who did all these ports for them recently is a dummy.... funny thing is that nobody can improve his ports to make more power just flow more and make less power.

dannyum89,

I'm guessing you have flat top pistons... WHICH IS GOOD.

Do you or don't you want to end up with ported heads? What in the end is the goal for your ride?

LT1's like compression, so you can go anywhere from here.

Bret

 

Im trying to get into the 400 range to the wheels. I would love ported heads but can't aford to lose my car for a few weeks even though it smokes like my grandmother. A few people told me to look at some used LT1 heads and just ship them to Lloyd. Maybe thats what ill do.

 

Sounds like a plan.. couple it with a couple of other mods (PCM, cam) and you should be close to that

 

Any news on how good these heads are going to be? I know the out of the box darts on LS1's are making some good power and are priced pretty damn good too.

 

The SBC Platinum heads are killer which these are patterned after.

Bret

 

From what I gather stock LT1 heads have.

53cc combustion chambers
175cc Intake runners
68cc exaust runners
angle spark plug

When picking heads I need to try to keep combustion chambers about the same as the factory heads correct? Im still waiting on the CR numbers on the 383 short block with the factory heads. I do know that it has flat top pistons.

 

Most ported LT1 castings on a flat top 383 with a zero deck and a Fel Pro 1074 = 12:1 Compression.

Bret

 

WOW! 12 to 1. Lets hope its something around that.

 

I got the CR numbers from the engine builder. He said its 11.5:1 with stock LT1 heads and flat tops. Decent?

 

sounds ok, pump gas will depend on DCR