cam shaft selection !
Thread Starter
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Junior User
Joined: Aug 2001
Posts: 53
Likes: 0
cam shaft selection !
need help on cam selection!
i have a 1965 ford f-100. rebuilding a 1970 model
429 10.5.1 compression ratio with dove-c heads with hardened
valve seats stock valves with mild port & polish. edelbrock
performer rpm intake with holley 750cfm dual feed vaccum secondaries,automatic trans with a 1000-2000 rpm converter.
gear ratio is 3.70 with 31.0 x 18.50 x 15lt mickey thompson
pro street tires. i want a cam that will have a nice rumble
to match the attitude of the truck but i also want a cam
with some bottom end. may add aftermarket a/c at a later time.
i do not want to sacrafice drivability. i recently bought a
complete comp cam kit with the 280 magum cam but i do not think
this is the right cam that i want.
thanks, terry !
i have a 1965 ford f-100. rebuilding a 1970 model
429 10.5.1 compression ratio with dove-c heads with hardened
valve seats stock valves with mild port & polish. edelbrock
performer rpm intake with holley 750cfm dual feed vaccum secondaries,automatic trans with a 1000-2000 rpm converter.
gear ratio is 3.70 with 31.0 x 18.50 x 15lt mickey thompson
pro street tires. i want a cam that will have a nice rumble
to match the attitude of the truck but i also want a cam
with some bottom end. may add aftermarket a/c at a later time.
i do not want to sacrafice drivability. i recently bought a
complete comp cam kit with the 280 magum cam but i do not think
this is the right cam that i want.
thanks, terry !
Mountain Pass
Joined: Jan 2001
Posts: 229
Likes: 0
cam shaft selection !
Your 280 cam is decent. It's a little on the high-end side for a truck, but adequate.. It has that decent rumpity sound to it, even more so if you have headers on your truck.
Yea, you will lose some bottom end power.. No, you wont notice it, because it will have heaps and heaps anyway. But with a 2000 stall converter on it anyway, you already lost half the useable power curve of the 460.. unless you beef up the rods and pistons, it wont rev past 5000rpm anyway.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Yea, you will lose some bottom end power.. No, you wont notice it, because it will have heaps and heaps anyway. But with a 2000 stall converter on it anyway, you already lost half the useable power curve of the 460.. unless you beef up the rods and pistons, it wont rev past 5000rpm anyway.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Thread Starter
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Junior User
Joined: Aug 2001
Posts: 53
Likes: 0
cam shaft selection !
proud owner,
what cam would you reccomend.how about the
270 magnum or how about the 4x4 comp extreme cam. this
cam selection decision is driving me crazy. i just want
a cam that will pull from 1500-6000 rpm range or somthing
close. but i also want a nice rumble.
thanks, terry !
what cam would you reccomend.how about the
270 magnum or how about the 4x4 comp extreme cam. this
cam selection decision is driving me crazy. i just want
a cam that will pull from 1500-6000 rpm range or somthing
close. but i also want a nice rumble.
thanks, terry !
Posting Guru
Joined: Apr 2000
Posts: 1,249
Likes: 2
From: Pryor
cam shaft selection !
1500-6000??? Can't be done. Not very well at least. A cam has a good power band of approximately 3000 RPM's. Maybe 3500 RPM's with a solid or roller cam. Anyway, you have to decide where you want your engine to operate. If you have to have power at 1500 then you'll start running out of power at 5000 at best. If you want power till 6000 then you can't count on much power until around 2500. Of course these are generalities, but the basic principle holds true across all engines and engine combinations, (well other than engines such as Honda's VTEC, which has variable valve timing).
Mountain Pass
Joined: Jan 2001
Posts: 229
Likes: 0
cam shaft selection !
True enough.. but without extensive mods and beef-cake stuff, a 460 aint goin past 5k anyhow..
I'd stick with a truck cam from Comp Cams.. they have a specific grind for heavier vehicles, giving you gobs of low end torque and decent upper end. Get the closest to the 274H grind they have..I dont have my books around, so I dont have a part number, but Im sure you can find it.
Have fun!
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
I'd stick with a truck cam from Comp Cams.. they have a specific grind for heavier vehicles, giving you gobs of low end torque and decent upper end. Get the closest to the 274H grind they have..I dont have my books around, so I dont have a part number, but Im sure you can find it.
Have fun!
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Posting Guru
Joined: Apr 2000
Posts: 1,249
Likes: 2
From: Pryor
cam shaft selection !
Plenty of people have had no problem using CJ/SCJ rods and good rod bolts (ARP) up to 6000 RPM's. No other mods are necessary. The crank is definitely strong enough. I know the oil system is somewhat lacking on the BB Ford, but tight tolerances and a high volume pump go a long way.
Mountain Pass
Joined: Jan 2001
Posts: 229
Likes: 0
cam shaft selection !
(apology) Of course... I was thinking more like a stock casting NON cj/scj block & rods..
Yes, unfortunately, the oiling system is not the best.. being that the cam gets it first, then drops it to the crank and rods..
As stated before, Comp Cams truck cams would be adequate for this application.. be sure to have your cam bearings matched to the cam before installation.. and, YES, get new cam bearings... it's a whole 40dollars of preventative maintenance, and well worth it.. in my opinion.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Yes, unfortunately, the oiling system is not the best.. being that the cam gets it first, then drops it to the crank and rods..
As stated before, Comp Cams truck cams would be adequate for this application.. be sure to have your cam bearings matched to the cam before installation.. and, YES, get new cam bearings... it's a whole 40dollars of preventative maintenance, and well worth it.. in my opinion.
J/.c
1965 Ford Galaxie 500 (okay, so not quite a truck)
460/C6 transplant @ 389hp/491 lb.ft.
14.29@103.8, 13-14 mpg heheheheheh
Trending Topics
Posting Guru
Joined: Apr 2000
Posts: 1,249
Likes: 2
From: Pryor
cam shaft selection !
Good call on the Xtreme 4X4 cam, ProudOwner. I think those grinds are excellent all around cams. I recently put the 262H in my 460 with close to the same specs as above. It has plenty of torque down low (stock converter) yet it will pull hard up past 5000 grand. It starts to feel like it is tailing off around 5500, but still a heck of a powerband. If I had it to do all over again, I think I would go with the next bigger Xtreme 4X4. I think I could use the next bigger one, even with my stock converter. If you're going to go with a higher than stock converter, you might even go two cams bigger than I went. Mine idles very smooth and has plenty of vacuum. Overall, I am very satisfied, though. I can't complain.
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