502 with Afr heads ideal compression ratio
#1
502 with Afr heads ideal compression ratio
I have a 502 gen VI short block with Srp flat top pistons(believe stock from GM)
That I am going to be building with 315 AFR heads and the crane 741 cam.
I believe the compression ratio will be 8.9-1 What is an estimate HP & torque this engine will put out?
Is the compression to low? Should I be boring the block .030 with more compression? or is that not needed?
8.9-1 sounds great for reliability purposes but want to make sure it will still put out enough power.
Thanks!
That I am going to be building with 315 AFR heads and the crane 741 cam.
I believe the compression ratio will be 8.9-1 What is an estimate HP & torque this engine will put out?
Is the compression to low? Should I be boring the block .030 with more compression? or is that not needed?
8.9-1 sounds great for reliability purposes but want to make sure it will still put out enough power.
Thanks!
#4
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iTrader: (3)
i would go with 10-1 and a cam from bob madera,he also can get you a fair deal on the afr heads.650 hp is what i would predict.edit in,i just reread your post,imo the 305 would be a better choice for your application.
Last edited by mike tkach; 12-30-2014 at 06:33 PM. Reason: more info
#5
Registered
I have a 502 gen VI short block with Srp flat top pistons(believe stock from GM)
That I am going to be building with 315 AFR heads and the crane 741 cam.
I believe the compression ratio will be 8.9-1 What is an estimate HP & torque this engine will put out?around 600hp
Is the compression to low? Should I be boring the block .030 with more compression? comps low,but if you have to order pistons,,just get the right dome for 9.5-1.right now you could run 89 octane
8.9-1 sounds great for reliability purposes but want to make sure it will still put out enough power.i've had great reliability at 10-1,but that requires high test.
Thanks!
That I am going to be building with 315 AFR heads and the crane 741 cam.
I believe the compression ratio will be 8.9-1 What is an estimate HP & torque this engine will put out?around 600hp
Is the compression to low? Should I be boring the block .030 with more compression? comps low,but if you have to order pistons,,just get the right dome for 9.5-1.right now you could run 89 octane
8.9-1 sounds great for reliability purposes but want to make sure it will still put out enough power.i've had great reliability at 10-1,but that requires high test.
Thanks!
#6
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#7
Platinum Member
Platinum Member
iTrader: (6)
EFI or carb ?
#9
Platinum Member
Platinum Member
iTrader: (6)
Yup what he said ^^^ and a new dist. gear lol, custom grind is the way to go with those heads, Id bet it would make another 40 hp
#10
Registered
depends on what exhaust you are running,but lets say cmi elbow tops around 600,gil or stainless marine 580-590 that is what i am seeing on a fully dressed marine engine on my dyno,add a little more compression and play with some cams 30-50 more hp,just depends on were you want your power curve to be,the afr heads flow real well and don't need a lot of cam to make good power