I had comp custom grind this for me. Then, after running the motor for 45 minutes I sold the blower, the car, bought a vette, having my heads milled for high compression, and need a n/a cam. (prolly a comp 306).

Here is the specs:

grind: CS 3036 / 3150 HR114.0 1987-1998 SR/HR Hydraulic Roller

230/245 @ .050, .534/.541 lift, 114 lsa, 112 ICA.

Duration at .006 282 / 307.

valve timing (at .050" ):

int : 3 btdc 47 abdc
exh: 58 bbdc 6 atdc

Specs are for 1.50 rocker.. lobe lift is .3560 / .3610


Ran for 45 minutes. Comes in original box with cam card # serial number.

Paid $260 plus shipping. Sell for $150 shipped anywhere in the 48 states.

-- Joe

 

Hmmmm..............this may be just what I need. Can I call dibs on this Joe? Gotta run some numbers & check a few things out before I can fully commit.

Let me know. Thanks!

Mike

 

Yeah mike no problem..

Honestly, I wanna keep it, but my machinest keeps telling me it will detonate NA.. Overlap is 66.5 degrees. If you calculate dynamic compression seat-to-seat method, its 7.47:1, if you calc it .050" method it's like 8.9:1

He tells me I should use a comp 306 cam. That cam has 74.5 degrees of overlap, but oddly enough, the dynamic compression calculates EXACTLY the same..

Now maybe the dynamic compression is the same, but hes saying the extra overlap will cool the chamber.. maybe soo. but 74.5 degrees of overlap also might tell the 02 sensor to go screw..

-- Joe

 

Thanks Joe!

You woudn't think the 8 degrees of increased overlap is that big a deal however it is a 12% increase over the blower grind cam so........
Is the change/increase more on the exhaust, intake or is it equally distributed?


My application will be for a non-roller block. Got/getting the retro-hydraulic rollers so I got that part covered. I think one can run a OEM style roller cam in an older block as long as you run a bronze distributor gear, a good quality thrust button and..... I'm quite sure there were some posts here on TGO a while back on this subject so I'll have to do some searching to refresh my memory.

Mike

 

Just use a small cap dizzy for a roller cam.

I'm not sure if i'm gonna use the 306. too much overlap. I remember the problems sleepy had with his LT1 running that cam..

But either way, I think this blower cam isn't gonna perform in a N/A car. And I'm not plumbing NOS in my vette. And I can't afford a vette blower kit. ($6,000 easy).

-- Joe

 

ttt. $150 shipped.

(in the 48 states)

-- Joe