[SSuper Dave]

I acquired a fresh shortblock that I have used in my car, and would like to know if there is a way to estimate cam specs from other information. There were no markings on the end of the cam, which is a flat tappet hydraulic. It idles around 950 rpms with 15 degrees of initial timing and only pulls 8 in/hg at idle. It sounds pretty rowdy and pulls against a 2,200 stall converter to the point where I think I'm going to have to get one with more stall. Its a .030 over 454 with flattops and '68 closed chamber heads, compression is around an actual 10.1. I'm not goint to pull valve covers off a perfectly detailed engine, but wonder if there is a way to ballpark estimate specs based on this info. If I am going to replace the converter, I'd like to get it right on the next try. I was told it was around .540, aint' no way this is true based on other big blocks that I've owned. All advice appreciated.

 

[mr 4 speed]

I acquired a fresh shortblock that I have used in my car, and would like to know if there is a way to estimate cam specs from other information. There were no markings on the end of the cam, which is a flat tappet hydraulic. It idles around 950 rpms with 15 degrees of initial timing and only pulls 8 in/hg at idle. It sounds pretty rowdy and pulls against a 2,200 stall converter to the point where I think I'm going to have to get one with more stall. Its a .030 over 454 with flattops and '68 closed chamber heads, compression is around an actual 10.1. I'm not goint to pull valve covers off a perfectly detailed engine, but wonder if there is a way to ballpark estimate specs based on this info. If I am going to replace the converter, I'd like to get it right on the next try. I was told it was around .540, aint' no way this is true based on other big blocks that I've owned. All advice appreciated.

why can't it be .540 lift ?
My friends 69 SS has a Summit 238/248 @.050 cam thats .540 lift and it has a pretty rowdy idle.
For a convertor,a 10" 3000-3200 would be good IMHO

 

[wildman926]

why can't it be .540 lift ?

For a convertor,a 10" 3000-3200 would be good IMHO

X2. In a previous 468, it had a 238/238 .542 lift cam from Clay Smith, on a 108 lsa, and it had a VERY healthy idle. This was on a 9.7-1 compression motor.

The 3000 stall TSI converter was perfect for it.

 

[SSuper Dave]

I had a .540 lift cam in a 427 a few years back, held 15 in/hg and idled at 700 rpm. I figured the cam wuold seem "smaller" to a bigger engine. I guess duraion and lsa make more difference. Can you get a 3,000 stall converter for lockup 2004R?

 

[mr 4 speed]

Can you get a 3,000 stall converter for lockup 2004R?

Dave,check with these guys as they specialize in 2004R trannies:
www.ckperformance.com

 

[d1_bradley]

Might contact "jakeshoe" on here. He's bigtime smart on OD transmissions. And, he's also in TX.

http://www.jakesperformance.com/