302 chevy
 

i am researching for a 302 chevy rotating assembly. not to many offer the thee inch stoke ----i don't want to use junk. i'll be buzzing it at the high end of the RPM range. i will use a legal dart block -bowtie heads -3000lb car- modified ss class. Your advise would be appreciated.:)

Re: 302 chevy
 

By the time you find a good G.M crank and do the machine work it will cost alot and you still have a factory crank...sounds like you're building a nice motor you might as well get a lightweight Cola or Crower...maybe a Winberg...just depend on how deep your pockets are!!...Luke SS 311

Re: 302 chevy
 

Might want to see if Callies has one for you. They make a 3" stroke version in the Magnum and Magnum XL versions, and they are VERY nice crankshafts.

http://www.callies.com/crankshafts/c...-availability/

Re: 302 chevy
 

Thanks for the help --i guess the best way is to contact the good suppliers . It seems the little chevys have been left behind

Re: 302 chevy
 

I have used stock 283 cranks on the end of 10,000 rpm and never hurt one. Am using one now in a 700 hp dart buick and has stayed in there 3 years. After market cranks, which i own too, are stronger and lighter, but never really ran quicker with them. Just saying, I'm not afraid of a chevy forging.

Re: 302 chevy
 

i have a lot of 283 stuff and would use them but i like the dart block features-the journal size is the issue.

Re: 302 chevy
 

Bearings are available to solve this issue.

Re: 302 chevy
 

We used to run a 69 Camaro in SSBS. The engine was a 316that we bought from the Otis Bros.We ran a 4 speed Jerico. It had the original 302 Crank from his 68 camaro in it. It had the rod journals cut to small journal and was hard chromed. We never ever had a bad looking bearing come out of it.

The Otis Bros were running comp with the billet cranks at the time. They said they wished the bearings looked as good as the old chrome crank.

I know it is harder to find these cranks now, but Dwight knows a thing or two about them.

Re: 302 chevy
 

I agree about the chevy forging..heck that's what i run in my SS motor..it's just a matter of finding the right crank...I like the 283 crank idea...Luke SS 311

Re: 302 chevy
 

We just run spacer bearings. Almost all small cube motors Al Parker does for us has small small and use large journal block. I also cut, and destroked small 283 to honda journal and so far, so good. Not saying after market isn't better, but I personally think they are strong enough to take it. After 40 years, have yet to blame the crank for engine failure. One time we hurt an engine bad, and called Al to tell him. he said, "I''l bet that turned down crank failed" I thought it did, but a rod broke and the crank was beat up bad, but never offered to break. I won't name the rod company, because I have never before or since had a rod failure. But we all know, strange things happen at 10,000.

Re: 302 chevy
 

you have convinced me to try a 283 in a 350 block. i find 350 into 400 block spacers but no 283 spacers---any help and who offers the best?

Re: 302 chevy
 

My Super Stock 283's left the starting line wide open with no chip. At 10,200 rpm, the small 4GC carb was the limiter. Never had a motor failure of any kind.

Re: 302 chevy
 

Clevite MS-1110H

http://www.jegs.com/i/Clevite/695/MS1110H/10002/-1

Re: 302 chevy
 

thanks Rustbucket---i've been enlighten

Re: 302 chevy
 

Glad to help!

Re: 302 chevy
 

I agree with everyone about the chevy 283 cranks, they are a tough piece and can be made to be very competive with the high dollar ones if you are willing to spend the time working on one. We also use the 1110-H, and they can also be had in plus or minus .001 if you have an issue with main clearance. If you are going to cut the rods to honda or smaller be carful if it is a pin guided engine or if you are running a verry narrow rod bearing because you are also moving the connecting rod oil hole location on the crank pin, and I have seen an engine where someone went this route and had an issue with this that caused them to lose some rods. Chamfering the oil holes on the crank pin can also make the situation better or worse.

Re: 302 chevy
 

That might have been what happened to my rod failure. That's exactly what I tried to do.

Re: 302 chevy
 

In most cases where you have a broken rod the easiest way to tell if it was rod bearing/crank failure or if the rod simply just broke is to see if the rod is still free on the crank. I have seen failures of both types, but in most cases where the rod simply just breaks it will still be free on the crank and the rod bearing/crank will not be hurt badly or burnt up looking. Now if the rod breaks and the crank and bearings are scalleded, burnt up, or simply just disentegrated then that is usally where your problem lies. Hope this helps.

Re: 302 chevy
 

I belive it spun before it broke, but the carnage was so bad, it was hard to tell. But thanks guy, you answered my question.