cam choice
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cam choice
the cam that came with my motor when i bought it was COMP CAMS 292H. it has a 292 duration and .560 lift. i am having the block decked more than it was to get the compression up. it should be about 9-9.5:1. i still want to run pump gas when i have to. i have run this duration cam in a SCB, but it had a smaller lift. what do you think about my combo. i also have stock milled ported heads and a performer rpm intake. the man who bought everything did not put it together right. i think it was tooooo much coors light. (go figuire). you guys have been a great help to me. most of the questions i wanted to ask someone has already brought it to the table. i have learned more by being on this sight than i have out of any book. don t look down on me, but i was a chevy nut. it got very boing after you found out that it is pretty simple to make them run. i love a challenge and so far this fe has given me more than i can stand . thanks guys..
Post Fiend
Joined: Jan 2003
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From: Iowa
You'll learn to appreciate the FE series. They're really a simple engine design that works very well for most any application you can think of, IMO.
That is quite a big cam. I'd get the heads ported for best results. If you have the money, a set of edelbrock heads will really wake it up. Most guys run something in the 270 - 280 degree range. Take a look at the Crane 343941.
I wouldn't get the block decked. You can get better compression with different pistons. With an FE, the only reason to get the block decked is to remove imperfections, or to remove warpage, which is uncommon in FE's. Same for the heads. The right combination of rods / pistons will give the compression you want. For an example, in a truck 390, you have a deck clearance of .112". Stick in a set of 360 pistons (which also happen to be car 390 pistons) and you have .012" of deck clearance and 9.5:1 compression!
That is quite a big cam. I'd get the heads ported for best results. If you have the money, a set of edelbrock heads will really wake it up. Most guys run something in the 270 - 280 degree range. Take a look at the Crane 343941.
I wouldn't get the block decked. You can get better compression with different pistons. With an FE, the only reason to get the block decked is to remove imperfections, or to remove warpage, which is uncommon in FE's. Same for the heads. The right combination of rods / pistons will give the compression you want. For an example, in a truck 390, you have a deck clearance of .112". Stick in a set of 360 pistons (which also happen to be car 390 pistons) and you have .012" of deck clearance and 9.5:1 compression!
Elder User
Joined: Jun 2001
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From: Corpus Christi, Texas
Griff I ran that cam in my 390 which had 10 to 1 compression with stock heads and vavles and had no problems running pump gas. I was a real nice cam and gave the engine plenty of power. I could run it up to 6000 rpm and still be making power. I had C8AEH heads which have a small chamber a 68-70 cc. that cam will make that 390 sound real radical and run really well. I also had the Edelbrok performer Rpm with a holley 750cfm. Good luck with your build. The pistons I had in my truck were rated at 9.5 to 10 to 1 compression.
Freshman User
Joined: Aug 2004
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From: Saybrook,Ill
I ran this cam for several years in a 67 Fairlane,390 4 gear.It idled at 1200-1300 and all I ever ran in it was 87 octane .I wound it to 7500 on more than one occasion and suffered several bent pushrods and a broken rocker shaft once.I had c8ae-h heads with CJ valves and Ford tripower.I just took this cam out and am in the process of detuning my Ford by putting a smaller cam in.I don't know what your plans are for your vehicle when you put it all back together but I would not recommend it be daily work transportation with this cam installed.
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Joined: Jul 2002
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From: Long Island USA
I have the almost exact same cam in my 390, 292/292 adv, 230/230@.050", .554/.554 lift. I decided to use the CJ exhaust valves because of the "square" valve timing and lift (same for intake and exhaust). Have no idea if the centers are the came, but... loped pretty good at 900RPM idle.
Mine pulled from 1500RPM up to 6000 with C8AE heads (ported to heck) and an Edel Performer 390. With 11:1 compression, it ran fine on 93 octane. From what I recall, my cam required at least 10:1 compression, so be careful going with 9-9.5:1.
Uh, russrobbins, 7500RPM on ANY American stock valvetrain will blow something
Mine pulled from 1500RPM up to 6000 with C8AE heads (ported to heck) and an Edel Performer 390. With 11:1 compression, it ran fine on 93 octane. From what I recall, my cam required at least 10:1 compression, so be careful going with 9-9.5:1.
Uh, russrobbins, 7500RPM on ANY American stock valvetrain will blow something
Elder User
Joined: Jun 2001
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From: Corpus Christi, Texas
I ran mine with stock Hydraulic rocker assembly and had no problems, did have some better pushrods made. The stock assembly will handle the Comp 292h Cam it is at its limmit but it will handle it
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i dont plan on taking it to 7500. as for all the valve train everything is aftermarket. adjustible rockers, beefier pushrods, the heads do have stainless steel oversized valves, like i said before it was not put toghther correctly.
by putting 360 pistons in this motor and changing the wristpin location , will it put more strain on the cylinder sidewall.
it is not a daily driver(weekend toy)
by putting 360 pistons in this motor and changing the wristpin location , will it put more strain on the cylinder sidewall.
it is not a daily driver(weekend toy)
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Joined: Jul 2002
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From: Long Island USA
Originally Posted by griff22imca
by putting 360 pistons in this motor and changing the wristpin location , will it put more strain on the cylinder sidewall.
Are you going to get the motor balanced?
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the motor is already balanced. i could tell by the grind and drill marks on the old pistons, rods, and crank. now i just need to weight match the new 360 pistons. that is what i did on my SBC. unless i am told otherwise by my machinist.