Callies Compstar crankshaft
I think they are rated at 900 HP from Callies. We have a customer with a twin turbo vette making 1200 HP to the ground on a mustang dyno with one. It's had a LOT of abuse over the last couple years and haven't heard of any problems with it! 
Jon
Jon
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FormerVendor
Joined: Mar 2010
Posts: 335
Likes: 1
From: Fostoria, OHIO
+also FYI, in terms of the balance comment...rough balance is included in the price.
-Adam
So you dont have any idea on how many rpms your cranks can handle? xxx hp pulling 6500 isn't the same as xxx hp pulling 9k.
I'd say 9,000 RPM would be a limit for a Callies LS crankshaft, beyond that may need Billet.
Billet crankshaft is stiffer, less likely to vibrate.
Strength wise, non twist 4340 forged crankshaft vs. Billet ; theirs strong cases for both sides.
Six counterweight crankshaft have less 'moment of inertia.'
Eight counterweight crankshaft is easier to balance a heavy bobweight.
People say Nascar, F1, ALMS, top fuel all run billet crank, thats why they're best. Billet crankshafts like billet turbo compressor wheels, it comes down to manufacturing costs. You wouldn't see as many Billet crankshafts being produced if Forged crankshafts didn't need expensive dies etc.
Other issue ran into, running an engine at 9,000 rpm, may need an overbalance. Circle track engine builds run into this more often, while a engine maybe balanced 50%, sitting on 9000 rpm it vibrates and needs extra weight added, 52, 53%. Thats where a Billet may not have an issue but a forged crankshaft may need the overbalance.
FormerVendor
Joined: Mar 2010
Posts: 335
Likes: 1
From: Fostoria, OHIO
Depends on the the application and stroke. I know the SCCA guys are spinning de-stroked DragonSlayers 9000+ Its all relative to the application.
Staging Lane
Joined: Oct 2012
Posts: 57
Likes: 0
Sorry to revive an old thread but pretty positive that TSP include the balancing into the cost. I know for a fact that Mallory metal is not for the feint hearted or stingy, and mine has it. I've had a few amazing builders in AUS check out my setup recently and have all loved the setup.
KUDOS to TSP!!!
Can't wait to fire it up
KUDOS to TSP!!!
Can't wait to fire it up
TSP built my motor and I love it. Just wish I would have had the extra cash to put a dragonslayer crank and I beams over the compstar crank and rods. But TSP built this motor very well so with that being said I think I can push the limits of what these are suggestively rated to at some point down the road. I originally wanted a 427 so by the time this motor has seen its life span I should have more than plenty of money to build the motor I really wanted but couldn't afford. When I build a motor I have it built to the best specs I can. I just had to sacrifice on the crank and rods on the 408 but I dont plan on going over 1,000 rwhp and if i do it wont be by much or very little time since it will be a nitrous setup for additional power at some point down the road. This is a great motor n/a and can't wait to see what it does when juice gets added into the equation possibly next year. Right now I'm enjoying the great torque of it being N/A. Love callies products and TSP with their great customer service and quality build.
Teching In
Joined: Jun 2013
Posts: 48
Likes: 1
From: Louisiana
I have an AES built 408 with compstar crank. It's already been 1085rwhp on the dyno, but I just put a new turbo on and it should be no problem to get 1200 but I think that's gonna be the limit. Talked to Brian at AES and they have a few guys that have had a few guys go in the 1200 range with the compstar
I'd be sure to put a good damper on if you're considering maxing out the combo.
Here is an interesting read over on ATI
http://www.atiracing.com/products/da...mper_dinan.htm
Here is an interesting read over on ATI
http://www.atiracing.com/products/da...mper_dinan.htm