Quick question?
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Postmaster
Joined: Oct 2005
Posts: 3,083
Likes: 4
From: Victoria , BC
Quick question?
I'm about to pick up my cam tomorow and I just wanted your opinion on it. I'm going with a comp cam 33-248-4
COMP Cams 33-248-4 - COMP Cams Xtreme Energy Camshafts - Overview - SummitRacing.com
It was reccomended by a VERY highly respected FE engine builder that has been on here previously and owns his own shop specializing in FE's not naming any names.
Anyways heres my build:
428 bored .030
d2teaa heads with cj valves
edelbrock performer rpm intake
770 holley offroad truck avenger
trw forged pistons 10:1
crane fireball electronic igniton
headers
5:13 gears
44" tires
Looking for bottom end torque and comp suggested a slightly milder cam but I thought I'd see if anyone has any experience with this one.
Thanks in advance for any help
COMP Cams 33-248-4 - COMP Cams Xtreme Energy Camshafts - Overview - SummitRacing.com
It was reccomended by a VERY highly respected FE engine builder that has been on here previously and owns his own shop specializing in FE's not naming any names.
Anyways heres my build:
428 bored .030
d2teaa heads with cj valves
edelbrock performer rpm intake
770 holley offroad truck avenger
trw forged pistons 10:1
crane fireball electronic igniton
headers
5:13 gears
44" tires
Looking for bottom end torque and comp suggested a slightly milder cam but I thought I'd see if anyone has any experience with this one.
Thanks in advance for any help
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
I would question whether or not you are really going to get 10:1 with TRW pistons, what's the part number on those pistons? It might be much higher than 10:1.
I would also question whether or not you need such a long exhaust duration with the bigger CJ valves. When I built my 390, I used a "square" cam - same duration for intake and exhaust, because I used CJ exhaust valves.
However, I think you're in the right ballpark. But I'm no expert engine builder, neither.
Guys?
I would also question whether or not you need such a long exhaust duration with the bigger CJ valves. When I built my 390, I used a "square" cam - same duration for intake and exhaust, because I used CJ exhaust valves.
However, I think you're in the right ballpark. But I'm no expert engine builder, neither.
Guys?
Thread Starter
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Postmaster
Joined: Oct 2005
Posts: 3,083
Likes: 4
From: Victoria , BC
No torque down low?? That's kinda what I need. My last cam was a 343941 crane which had just a slightly milder spec. It was advertised as a tow/4wheeling cam used with a 8-10:1 compression. It worked pretty good with my rebuilt 390...
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FTE Leadership Emeritus
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From: Long Island USA
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Tuned
Joined: Feb 2009
Posts: 370
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From: Near Nashille, TN
I have to admit that my experience with cams has been with the small block and not the FE engine, so maybe someone else can chime in about big block cams. With more duration, the Comp cam should operate at a higher rpm range than the Crane... i.e. less torque down low. It all depends on what you want. At least you have the Crane as a starting point.
