Hemi cam question...

[HemiDave]

I'm building a 472 Hemi and I have some cam choices. An existing cam I have is a hyd. roller with a lift of .565, a duration of 242 @ .050 and 109 overlap. This will be going in a 68 Charger R/T with stock intake, stock exhaust manifolds and either 3.23 or 3.55 gears.

Is the cam too much for this application? I want an easy to start and cruise car with a little rumble at idle just to let you know it's not stock. Any other recommendations?

I actually know the history of this cam an it was used to test for F.A.S.T. class racing.

Thanks for your opinions!!

Dave:upside down:

 

[RustyRatRod]

I was thinkin it's a little small. I also would rather see a solid in it. But that's just my personal opinion. I would go somethin like .600/.585 255/265 @ .050 ground on a 112. Strokers generally like wider LSAs and the Hemi heads are so efficient, you can cram more in the intake because the exhaust is so free flowing.

 

[snakeoil24]

This stroker is a World castings block? If it is the oiling is better than factory block. Hydraulic Roller may need block grinding. The cam size is fine. More would be better. But overlap will provide lopey idle. Higher lsa will provide more vacuum signal but less radical. I would recommend using a solid roller instead of a hydraulic roller. Also remember use oil thru push rods for good oiling. The best rollers are Crane and comp cams, they dont require bushing the ifter bores. pay close attention roller bearing oiling. I would run a single carb, stay far away from 2x4, they were a head ache when they came out and still are. Look at a Quick Fuel carb, really nice quality. Get the best timing chain you can afford.

 

[HemiDave]

Thanks!

I think the exhaust manifolds might be the limiting factor...

Ever try to remove the valve covers or heads with the master cylinder and all the other stuff in the way....?:angry9: Hydraulic is the best option for a street car that's just a cruiser....now, the 33 Plymouth coupe I'm building....:headbang: My biggest problem there is deciding on a blower or some Hilborn injection!!

Dave

 

[snakeoil24]

You can use flexible lines between master cylinder and distribution block for easier removal of valve covers. Or you can get a new 7 or 8 inch duel booster. If you use cast valve covers you may have an issue with passenger side shock tower. I would stay away from retrofit rollers. Solids are easier and less to go wrong. The stock exhaust manifolds are really pretty good for the street. less problems on starter motors, heat, clanky noise and bolt tightening. if your hot for headers then use copper gaskets and TTI is the only game in town

 

[Meep-Meep]

That cam doesn't sound good to me either, especially with the stock intake and manifolds. Rusty has the right idea about widening the LSA. I spoke to Chuck Lofgren about a similar build and he recommends a 114 LSA for the 472. He has some custom grinds in the mid .500" lifts, but whatever he recommends will most likely work. I'd talk to him.

 

[Ron Kirkpatrick]

Your cam is to much for stock intake and exhaust manifolds. I have many of them. I build them. I run solid lifters. Call a cam company and tell them what you want to do. You don't have enough compression to run it properly

 

[HemiDave]

Thanks, guys!

Yeah, I should just call Comp and maybe Lunati. With whom is Chuck Lofgren associated?

Dave

 

[Hemirunner]

These are the specs of one that I have for sale if you check my old postings.

Comp CRH2513B/2516B HR12 Hydraulic roller cam new in box.
.609 lift intake, .589 lift exhaust
[email protected] int, [email protected] exhaust
112 LSA

It'd wake that beast up! I did a restomod 477ci hemi that made 650hp with this cam grind using stock intakes and exhaust manifolds.

 

[HemiDave]

Found your thread. PM on the way...

Dave

 

[Meep-Meep]

Thanks, guys!

Yeah, I should just call Comp and maybe Lunati. With whom is Chuck Lofgren associated?

Dave

http://www.lofgrenauto.com/

I believe Chuck built the engine in Joel Nystrom's 67 GTX
http://www.youtube.com/watch?v=QMq01V-qo50&feature=relmfu

 

[RustyRatRod]

Looks like somebody was drinkin and videoin. lol