1baaadz28

iTrader: (9)

Im lookng at doing a partially forged 346 with an F1, just a lil short on cash for the crank, but i was wondering if the stock crank would work reliably with the F1 setup or should I just save a bit longer and get a forged crank?

Johnv

stock crank will be fine, good for 1000 hp plus.

just make sure you use ARP mains bolts and pin the crankshaft pulley.

UndrPrs

If you have the crank out of the motor, I would key the crank vs just the standard pinning method.

MUSTANGBRKR02

iTrader: (91)

I would do a forged crank. 1000 hp in a turbo car is not the same as a supercharger due to it actually running off of the crank.

Inspector12

iTrader: (29)

MUSTANGBRK02 is somewhat right, but mine held up to 975rwhp with an F1R. But some have had some issues with the stock crank if everything isn't perfect, and the ATI pin kit won't work you will have to use the other one as it will just chop the pins off as I know from experience. So either double key it or get the other pin kit like the ones that come with the Magnacharger kits etc... You will have to grind down the fixture to fit inside an ATI balancer to make it work. You will have to use a spring tentioner if in an F-body or corvette not that you wouldn't have to for belt slipping reasons, but you will bend the stock cranks and even possibly a forged one by putting enough tension on the blower to keep the belt from slipping etc...

1baaadz28

iTrader: (9)

I appreciate all the info so far, hope to get some more opinions

SilverSS

iTrader: (30)

No problems for me. I was worried about the stock crank snout snapping or spinning off due to the power the blower eats up. Make sure the crank is keyed during the build or use multiple pins if ATI (1 pin is not enough) and you will be fine.

trenaman

dude, it will be fine.. not liek you are putting down 1500hp.. they do fail but it is usually due to NOS or bad tunes..

1baaadz28

iTrader: (9)

just lookin to make around 750

blue00ZZleeper

iTrader: (5)

Thats one of the dumbest things I've heard all day. It doesnt matter what setup you run, It just needs to be well matched. If your looking to make a lot of power, it costs money. If you want to make 900+ rwhp...go with a forged crank seeing as how it will see 1050ish to the flywheel. If your looking for 800ish wheel, a stock crank will do. Dont chance breaking something and ruining the whole engine because you want to do it cheaper.

Engine_HP

iTrader: (1)

we made 750rwhp yesterday c5z with F1-R stock ls1 crank

fatmat80

you should be fine with a stock crank. Like someone mentioned earlier, make sure to use arp fasteners and harware and you should be ok.

BLNLS1/RX7

iTrader: (2)

Dont do it.

1baaadz28

iTrader: (9)

what about callies compstar for a 383 or a callies magnum in stock stroke? it would be all ARP fasteners

MUSTANGBRKR02

iTrader: (91)

You are better to overbuild it and never need it then the other way around. If you are building the motor now then I say forge it.

1baaadz28

iTrader: (9)

well i got callies rods and and ARP bolts ,the good ones, ARP mains, head studs and all the other major components if i went with a compstar crank how much boost could it REALLY hold?

1baaadz28

iTrader: (9)

INSPECTOR12 anyway i could get some pics of your setup?

Bob@BruteSpeed

iTrader: (16)

http://www.exoticperformanceplus.com...Car.php?car=54

We built the above Corvette at the old shop (that is now closed) using a stock crank. It was at 16 psi and made 740 rwhp and ran up a lot of miles for several years on a road course. It saw more wide open throttle miles in one season than most cars do in a lifetime. If you add a Compstar crank you can safely run 20 to 22 psi of boost. Bob

jbowles17

id say forged that way if u decide to do more hp in future your crank is ready for it less to worry about

ChevyChad

iTrader: (50)

I'm running a stock crank with my F1 setup. I did have a keyway machined in it though. When I built mine, the compstar crank was not available yet. Had it been, I definitely would have used it. But I have not had any problems with mine. I still am using a manual tensioner too.