Stock 6 bolt crank

[clipto]

Should I use my stock 6 bolt crank or buy a forged crank. Going to be making around 500whp. Anything I should do to the crank i just disasembled my motor and my block is sitting in the hot tank.

 

[bryanwheat]

I would use the stock crank, make sure that the machine shop removes the ball plugs in the oil passages and cleans them well though. The stock crank is very very strong and will handle what ever you will throw at it.

 

[Bo0sTdTsI]

Id stick with the stock crank, should be just fine to get you there, saves you alot of money to.

 

[clipto]

Ok cool is there any more machine work that should be looked at while they have it? Do I need to tell them to do anything to the crank while they have it like polish it or anything? Nothing was wrong with the shortblock when i got it I was just refreshing it up and going to put forged rods and pistons on it. Is it bad if they turn the crank or anything or should I leave it alone?

 

[bryanwheat]

Ok cool is there any more machine work that should be looked at while they have it? Do I need to tell them to do anything to the crank while they have it like polish it or anything? Nothing was wrong with the shortblock when i got it I was just refreshing it up and going to put forged rods and pistons on it. Is it bad if they turn the crank or anything or should I leave it alone?

IF the engine didn't have any bearing problems than you shouldn't need to have the crank turned. It is still a good idea to clean the oil passages. You won't know for sure until it is checked out by a machine shop.

 

[clipto]

IF the engine didn't have any bearing problems than you shouldn't need to have the crank turned. It is still a good idea to clean the oil passages. You won't know for sure until it is checked out by a machine shop.

Yea machine shop guy on vacation but I will have him clean the oil passages.

 

[2g98]

The stock crank and as everyone else has already said oil passages a must and the machine shop should be able to tell you if a polish is needed. Good luck

 

[Clutch450]

Stay stock crank. You can take that to high HP levels
If I were you have the machine shop mic the crank out. Make sure its withing spec. Have it polished and cleaned.

 

[clipto]

I talked to the machine shop today they cleaned all the oil passages everything looks good. When the machinist guy gets back from vacation he will inspect the crank for me. Does anyone know and I have been looking about forged pistons and there horsepower rating. I want to get a set of manley pistons but no where does it say if there capable of 500whp or not, nether does je or any other brand. Would all forged pistons be able to handle 500whp?

 

[bryanwheat]

I talked to the machine shop today they cleaned all the oil passages everything looks good. When the machinist guy gets back from vacation he will inspect the crank for me. Does anyone know and I have been looking about forged pistons and there horsepower rating. I want to get a set of manley pistons but no where does it say if there capable of 500whp or not, nether does je or any other brand. Would all forged pistons be able to handle 500whp?

Does your crank still have the balls in the oil passages, or are there threaded in plugs in their place. If the balls are still there than they didn't properly clean the passages.

 

[clipto]

I will find out tomorrow when I pick up the block if they did it right.

Finnaly got motor back 3 out of 4 ring lands busted, 1g pistons suck. 1 rod had broken rod bearings. The crank is good and the block is good.

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[Mark L]

The stock crank is very strong. As long as the bearing surfaces are good I would stick with OEM! I run an OEM 100m 6 bolt with no issues and 20+ 150 mph passes to date!