Guesstimations With A Sb 408 Combo
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Guesstimations With A Sb 408 Combo
I Have A 408 And Was Wanting Opinions On How Much Power Ya'll Think I Would Make With Sportman Ii Cylinder Heads Right Out Of The Box Which Consist Of 200cc Intake Runners With 10:1 Compression In Combination With A Comp Cams Hydraulic 274 Cam And The Performer Rpm Intake In Conjunction With Edelbrock's 800cfm Eps Carb. I Was Wanting It For A Budgeted Street/strip Motor With Stock Internals. It's Going To Be The Heart Of A 3,360 Raceweight 1987 Camaro. Any Inputs Would Be Greatly Appreciated!!!!!!!!!!!!!
Thanks, 1sicsss
Thanks, 1sicsss
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87 Camaros are the best!!!!! As long as you have lts and it is a roller cam it should be in excess of 500hp, that should make for a 10 sec car with the proper drivetrain.
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-Jeremy
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According to potential HP calculation's they could support up to 493 HP. With a bowl blend and some clean up work they should be able to support 550 HP. http://www.malcams.com/legacy/misc/headflow.htm
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That's cool. I have just found from my personal experience that it takes a very good SBC combination to make more than 500 hp. I have never used Sportsman heads, so I shouldn't speak with authority on them. I would still like to see a SBC with Sportsman II heads that makes 550 hp though.
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You can build many different combo's to make the 550 HP (355/383/377/406/414/421). The problem then becomes streetability, E85 would work fairly well in this situation. You are going to need compression (12.75:1 or better) in order to complete this goal. I build IMCA "Modified" motors that require cast iron heads and a flat tappet cam, these motors are 550+ HP on alcohol. I have designed a cam that works very well with the Sportsman II's. It took me countless hours on my dynomation engine building program and a full race season changing cam profiles until I found the best cam that worked well for the 383's & 406's.
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You can build many different combo's to make the 550 HP (355/383/377/406/414/421). The problem then becomes streetability, E85 would work fairly well in this situation. You are going to need compression (12.75:1 or better) in order to complete this goal. I build IMCA "Modified" motors that require cast iron heads and a flat tappet cam, these motors are 550+ HP on alcohol. I have designed a cam that works very well with the Sportsman II's. It took me countless hours on my dynomation engine building program and a full race season changing cam profiles until I found the best cam that worked well for the 383's & 406's.
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Are you kidding? Ive seen plenty of 350s on pump gas making 500hp without a solid roller or a crazy setup. If a 408 cant churn out 500hp then there is something seriously wrong. All a 408 needs to reach that number is a roller cam w/230+duration and around .600 lift and a set of out of the box aluminum heads with flow #s in the 260cfm range. There have been multiple magazine builds with less cubes and sportsman heads that made 500hp, just because your alky engines only make 550hp doesnt mean you can base all sbc builds on that. I know you are probably alot more experienced than me but c'mon, cam-only ls1s make 500+hp with 10:1 cr.
Last edited by 1997bird; 11-27-2007 at 08:48 AM.
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Are you kidding? Ive seen plenty of 350s on pump gas making 500hp without a solid roller or a crazy setup. If a 408 cant churn out 500hp then there is something seriously wrong. All a 408 needs to reach that number is a roller cam w/230+duration and around .600 lift and a set of out of the box aluminum heads with flow #s in the 260cfm range. There have been multiple magazine builds with less cubes and sportsman heads that made 500hp, just because your alky engines only make 550hp doesnt mean you can base all sbc builds on that. I know you are probably alot more experienced than me but c'mon, cam-only ls1s make 500+hp with 10:1 cr.