Street89vette

Trying to match David's LT4 conversion intake with new 383 with 195cc heads 10.5 to 1 ratio. Looking for good performance approx 5500rpm. Any suggestions will help. Auto/3000 stall and shift kit/ stock rear end.

Pwnage1337

What rear gear?

Street89vette

3.07 factory on 89 automatic, have to keep the highway gears

rklessdriver

The cheapest and easiest thing to do is the GM LT4 Hot Cam. It will make 5500RPM in a 383 easily and work well with your stall and gearing. Even with the base AFR spring package I would recommend you run 1.65 or 1.7 ratio rocker arm on it.

I could make a little more power with a custom grind from Mike Jones's EHR series Lobes but at considerable added expense.
Will

96 lt-4

Hotcam is a good default choice.Or one of the smaller cams that Loyd Elliot offers with more lift.
http://elliottsportworks.com/home/?page_id=32

Advanced Induction has some nice grinds as well.

BacknBlack

I wouldn't pick a cam smaller then a CC503- 224/230 .503/.510 for your set up. What are the flow #s for the heads?

C409

..... Are the ports on the heads going to match up to the raised ports on the LT4 intake ? .....