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post #1 of 8 (permalink) Old 10-13-03, 10:38 AM Thread Starter
Munch Munch Rice 4 Lunch
 
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Cranks And Rods

i have a couple of motors at the moment, none of them are running.
Firstly: 351, 30 thou pistons 10 thou crank.
302, 30 thou pistons stock crank.
can i put my 302 crank and rods into the 351 block without any problems, is the length of the bore enough to accomodate the different crank? i was told the length of the skirts in the bottom of the block were longer or shorter or something and that i can't change the cranks between the two engines.
and please don't ask why i want to put the shorter crank in the different block,
if your curious check out post 15 in this link carburettor
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post #2 of 8 (permalink) Old 10-13-03, 03:04 PM
Choco
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Re: Cranks And Rods

Sure the block is a 335 series so you can put in a 302 crank and rods. I think that a cleveland block can handle 3.85" of stroke depending on the piston (not 100% sure though)
Effectively if given the block with nothing in it you wouldn't know it if it was a 302 or a 351.

Seriously though if you are rebuilding the engine get a smaller carb and one piece valves.
Also reading over some of your older post don't get components that wont match our you will be seriously dissapointed with your result.
If you are a first time builder please take your time getting your information right before spending you doe.


cheers,
choco





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post #3 of 8 (permalink) Old 10-13-03, 10:14 PM Thread Starter
Munch Munch Rice 4 Lunch
 
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Re: Cranks And Rods

i'm only going to sell the car anyway so i won't be putting any high performance parts in it, i bought it because it was cheap (at the time) and i was told it had some really good stuff in it although it turned out to be all pretty stock, so i figured after having problems with the motor ie the melted piston, that i'd just get rid of it and try to get some money back.
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post #4 of 8 (permalink) Old 10-13-03, 10:19 PM Thread Starter
Munch Munch Rice 4 Lunch
 
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Re: Cranks And Rods

what do you mean one piece valves?
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post #5 of 8 (permalink) Old 10-14-03, 01:48 AM
Choco
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Re: Cranks And Rods

The orginal motors came out with two piece valves that fall appart. This can be a very costly problem.

Aftermarket valves are one piece. They are also single grooved which stops the other common problem of the locks letting go, also very costly.





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post #6 of 8 (permalink) Old 10-14-03, 10:16 AM Thread Starter
Munch Munch Rice 4 Lunch
 
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Re: Cranks And Rods

well shit hey i didn't know that,
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post #7 of 8 (permalink) Old 10-15-03, 02:55 AM
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Re: Cranks And Rods

keep the thing under 5500rpm and you shouldnt have a problem...

sr



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post #8 of 8 (permalink) Old 10-17-03, 02:07 AM
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Re: Cranks And Rods

Quote:
Originally Posted by xr8_sprint
keep the thing under 5500rpm and you shouldnt have a problem...

sr
I certainly wouldn't race for a long period of time with 2 Piece Valves and Multi Groove Collets. A disaster waiting to happen.

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