Compression Ratio
03-15-2006, 08:47 AM
#22
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I am at 11.3:1 CR without any issues with 93 octane and still able to run 26-27 degrees timing. A number of guys in the area I moved from were in the 12x range and doing fine on pump gas (93). Mine is a 4.040" bore, 236/243 cam.
03-15-2006, 05:55 PM
#23
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I'm thinking 12:1 won't be much of an issue.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.
03-15-2006, 09:12 PM
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How high do you want to rev? How much stall will you put up with? how much gear will you run?
I agree with their cam choice. Id always rather under-cam than over-cam anyway.
I agree with their cam choice. Id always rather under-cam than over-cam anyway.
03-15-2006, 11:21 PM
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I don't think that cam would be a performer. If I were shooting for a stock like motor, maybe so, but I don't see that cam netting the results I'm after.
I plan on a 3800 converter, roughly. I like my converters loose and hard hitting, so going a little bigger wouldn't hurt my feelings to much. 4400 would be the most.
I run 4.10 gears.
I'm not scared to rev a motor. After all ... I think I was the only one revving a 5.3 to 7k.
I plan on a 3800 converter, roughly. I like my converters loose and hard hitting, so going a little bigger wouldn't hurt my feelings to much. 4400 would be the most.
I run 4.10 gears.
I'm not scared to rev a motor. After all ... I think I was the only one revving a 5.3 to 7k.
03-16-2006, 02:59 AM
#28
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Originally Posted by Flyer
I'm thinking 12:1 won't be much of an issue.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.
They really THINK they know it all.
03-16-2006, 08:20 AM
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Originally Posted by treyZ28
You'll certainly want more gear than a 4.10 if you have a 4000+ converter.
Are you going solid roller?
Are you going solid roller?
03-16-2006, 10:57 AM
#30
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Originally Posted by Flyer
I'm thinking 12:1 won't be much of an issue.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.
I hummored myself and called CompCams to see what they suggested, gave them all the specs they asked for, 408, 12:1 compression (that's to much for street), yadie yadie. They suggested a 222/224 114 cam. I asked how come that small, and mentioned that someone recommended a MUCH bigger cam, 248/254 113, and got laughed at. He said he didn't believe that it would fall out of a wet paper sack. That was WAY to much cam for a 4400 pound truck.