Opinion on this Build
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Laughing Gas
Joined: Jan 2002
Posts: 1,008
Likes: 1
From: Tucson
Opinion on this Build
My 67 F-100 now has a 352, headers, 4spd and 3.50 rear end. I'm replacing the 352 with my son's 390 block and pistons. He only had a couple of thousand miles on this block. Here's the plan:
* 390 already .030 over;
* Block has been decked (not certain how much);
* 390 crank from 1963 T-bird (ground);
* Speed-Pro L2291F pistons;
* Rods were on these pistons in my son's 390;
* Heads from 1963 T-Bird - hardened seats and new valves; some work done on the bowl area;
* Crower cam: (16241) - 222* & 228* duration with .538" & .552" lift, degreed when installed;
* Proper springs for this cam with otherwise stock valvetrain;
* Matched push rods (longer than stock);
* RPM Peformer intake;
* Edelbrock 750 cfm carb;
* 2 and 1/4" dual exhaust with Hooker Headers.
I'm not sure what the compression ratio will end up to be but I'm told a bit over 9.1 or maybe 9.2:1.
I drive this truck every day and am modifying it to simply have a little fun. Comments? Thanks.
jor
* 390 already .030 over;
* Block has been decked (not certain how much);
* 390 crank from 1963 T-bird (ground);
* Speed-Pro L2291F pistons;
* Rods were on these pistons in my son's 390;
* Heads from 1963 T-Bird - hardened seats and new valves; some work done on the bowl area;
* Crower cam: (16241) - 222* & 228* duration with .538" & .552" lift, degreed when installed;
* Proper springs for this cam with otherwise stock valvetrain;
* Matched push rods (longer than stock);
* RPM Peformer intake;
* Edelbrock 750 cfm carb;
* 2 and 1/4" dual exhaust with Hooker Headers.
I'm not sure what the compression ratio will end up to be but I'm told a bit over 9.1 or maybe 9.2:1.
I drive this truck every day and am modifying it to simply have a little fun. Comments? Thanks.
jor
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Your compression could be anywhere. You need to take some measurements to be sure. These are:
1. Piston valve relief volume
2. Deck clearance
3. Head gasket installed thickness
4. Head chamber volume
I suspect it will be more like 9.75:1 by the time you figure it up.
On the cam:
Desktop Dyno shows that the Crane 343941 will deliver both more low end torque and more horsepower. Either cam should work fine though.
1. Piston valve relief volume
2. Deck clearance
3. Head gasket installed thickness
4. Head chamber volume
I suspect it will be more like 9.75:1 by the time you figure it up.
On the cam:
Desktop Dyno shows that the Crane 343941 will deliver both more low end torque and more horsepower. Either cam should work fine though.
Thread Starter
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Laughing Gas
Joined: Jan 2002
Posts: 1,008
Likes: 1
From: Tucson
Thanks, Rusty. When I get the measurements, I'll post again. I'm committed to the cam and am hoping for the best. My only real concern is the heads as I am not having a lot of work done to them. We'll see.
jor
jor
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