scatt cast steel crankshaft question

what will a 4.5 stroke cast crank hold out too???

Im hearing numbers from 500 all the way up to 850???

Help!! im confused!!!!

doing????

street strip use N/A nothing over 6500 rpms

Should work fine.

thanks!
Ive just been so confused about this lately its been driving me nuts.
how far in your opinion can you push one of these cranks?

Depends on what your doing with it, how well you prep it and how long you expect it to last.

Maddmattmustangs wrote:what will a 4.5 stroke cast crank hold out too???

Im hearing numbers from 500 all the way up to 850???

Help!! im confused!!!!

A lot will depend upon what brand crank it is to begin with ...

street strip setup. rare blasts to 6500 rpms.
Im having a local builder do the balancing and prep work for my rotating assimbly hes been doing bbf's since the 70's.

Im considering this only because i dont think im going to need a forged crankshaft for my wanted output (700 -750 max) so im trying to figure out if a cast crank is going to work for what im wanting to do.

The other factor to consider is the cost of balancing. On the one I did the cost of going to internal balance with a 2450 bob weight put a pretty big dent in the difference between the cast piece and the forging. I think the mallory alone was something like 450 bucks. These days the forged scat piece is pretty reasonable. Got one from Adney recently for under a grand ready to run.

dkp

if you are going to make 700 or more h/p. i would go steel the steel crank will spread the load evenly over the main cap&CHEAPER to balance....a win-win situation.I.M.H.O

When is Billet the option

511Fox wrote:When is Billet the option

When we get $3,000

Lem Evans wrote:

511Fox wrote:When is Billet the option

When we get $3,000

Last time I called they were $3800 but I got one way less but it ain't fer sale

Randy

Im not at the billet point...............................yet.
So a forged piece would probably be more cost effective in the long run?
I just want to do this right the first time.
I hear eagles forged cranks are a good piece, is this true?

just pulled a scat 4.30 scat crank out of my 532 lost a rod bearing 5 years at 2850lbs running 5.60 full tube chassis 13.7 compression and shifting at 6400. got a little greedy and put some n20 8740 rod bolt stretched. well pleased with the quality of the scat casting. got a new forged piece for the N20 the 4.30 can be gound.10 and will still be fine, waiting to build a truck motor for pulling the race car and the crank will be put back to work.

studly wrote:just pulled a scat 4.30 scat crank out of my 532 lost a rod bearing 5 years at 2850lbs running 5.60 full tube chassis 13.7 compression and shifting at 6400. got a little greedy and put some n20 8740 rod bolt stretched. well pleased with the quality of the scat casting. got a new forged piece for the N20 the 4.30 can be gound.10 and will still be fine, waiting to build a truck motor for pulling the race car and the crank will be put back to work.

So this was a cast crank?

yes brought the kit from Doug Herbert a scat cast stroker crank h beam rods and JE pistons very happy with the quality, just got a new 4340 from Adney if it is as better than the cast i am set

sounds good!
Im probably going to go cast since it seem to be my best bet.
Thanks for the feedback on there cranks