brians91formula

iTrader: (12)

Will most likely be running an F1D Procharger at 800rwhp through a T56. What crank will be able to hold the power reliably? This will be mostly a street car that sees highway pulls and the drag strip few times a year. I found a sweet deal on an LQ9 ironblock so that's probably what I will use.

Stock LQ9 crank
Callies C-Series Crankshaft
Dragon Slayer

+badss+

iTrader: (12)

I have the dragonslayer in my 390.

BadgeZ28

iTrader: (28)

The stock crank will live at that level if you keep the rpm limit around 7k

brians91formula

iTrader: (12)

car will probably only see 6500rpms. I heard the prochargers put a lot more stress on the crank. Dragonslayer is a nice piece but pricey. I don't want to get it unless its really needed.

6D9 Matt

If it was me, Id go with the C-series to be safe, and yes I think Dragonslayer is not necessary at that level.

ajrothm

I just went with a Compstar 4.0 crank. I was told they will safely handle 1100-1200 "supercharged" rear wheel HP with no issues. Yes supercharged HP and turbo charged HP is completely different... You are really making a lot more HP at the the crank with the super charger....but the supercharger itself is eating up a ton of power so you never see it in the car.....Still a lot more load on the crank though... Not to mention the stress on the snout.

Preston99WS6

iTrader: (7)

Seen a lot of cars 800+RWHP on the stock crank with H beams and a good piston, make sure you use ARP 2000 rod bolts, and ARP studs for the mains and heads and it will live a long life.

The crank in my LQ9 is the original from my LS 110K on it. The last 30K have been 680+RWHP. I recently switched to the bigger turbo and will be taking it 800+RWHP.

js2fst

iTrader: (12)

Is that the one Automagic had problems with

blue00ZZleeper

iTrader: (5)

I'm running the stock crank in my F1/370 combo but wouldn't venture with too much more boost. The nice thing is that the aster bracket doesn't load the snout of the crank the same way a traditional bracet does. To keep enough belt tension on a standard bracket, you need to crank way the heck down on it causing a lot of stress and strain on the snout and thrust bearing. With the aster bracket, it doesn't have nearly as much strain on it since its using a automatic spring tensoiner. I also only spin the motor to 6500 or so. It's great for a budget build but you can also get a forged crank cheap enough for that added insurance. Either way with good machining and assembley procedures you should be fine.

Tirefire

iTrader: (1)

C-ceries crank here going to take it to about 850-900 rwhp...

brians91formula

iTrader: (12)

Im about ready to pull the trigger on the following:

AES 390ci LQ9
Callies C-Series Crankshaft
Compstar H-Beam Rods with ARP 2000 rod bolts
Diamond forced induction pistons
Heavy wall wrist pins
Steel top ring set
H-series Bearings
ARP main studs
Head studs
(most likely PRC 237cc heads)

I'm thinking that will get me 800rwhp and still be plenty safe.


Good to know! Thanks!

brians91formula

iTrader: (12)

Ohh and I'll be running an aster bracket too. Hopefully that will take some stress of the crank snout.