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302 clevo to windsor?? 

 

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 Post subject: 302 clevo to windsor??
Posted: Fri Apr 27, 2007 11:58 am 
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My mate and I have a KE-55 corolla coupe with a 302 clevo.. we were wondering, how would we go about making it a 351clevo? we need 2 change the crank but not sure bout the rest..help would be greatley appreciated.

let me know if you want pics, ill post them up.

CAR IS UNFINISHED

 

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Posted: Fri Apr 27, 2007 2:26 pm 
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oh hell yeah everyone will wanne see pics..
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Posted: Fri Apr 27, 2007 3:38 pm 
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your right on the crank

Look into the rods thou - my 302 was converted to 351 using the 351 crank but 302 rods for a shorter stroke
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Posted: Fri Apr 27, 2007 4:43 pm 
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xf_man wrote:
your right on the crank

Look into the rods thou - my 302 was converted to 351 using the 351 crank but 302 rods for a shorter stroke

It doesn't change the stroke, it just changes the piston to rod ratio.

You can just change crank and rods, or as above, use 351 crank, 302 rods and buy the pistons to suit.
Clevo are known for bore stress due to the angle of the rod at BDC, with the longer rod it keeps it higher up the bore.

What are you using the car for?
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Posted: Sat Apr 28, 2007 10:34 am 
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we are using the car for burnouts

 

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Posted: Sat Apr 28, 2007 8:23 pm 
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Walker wrote:
xf_man wrote:
your right on the crank

Look into the rods thou - my 302 was converted to 351 using the 351 crank but 302 rods for a shorter stroke

It doesn't change the stroke, it just changes the piston to rod ratio.

You can just change crank and rods, or as above, use 351 crank, 302 rods and buy the pistons to suit.
Clevo are known for bore stress due to the angle of the rod at BDC, with the longer rod it keeps it higher up the bore.

What are you using the car for?


So when you use the 302 rods is the stroke the same as a standard 351? 3.5 inch isn't it?

 

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Posted: Sat Apr 28, 2007 8:27 pm 
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phatal wrote:
Walker wrote:
xf_man wrote:
your right on the crank

Look into the rods thou - my 302 was converted to 351 using the 351 crank but 302 rods for a shorter stroke

It doesn't change the stroke, it just changes the piston to rod ratio.

You can just change crank and rods, or as above, use 351 crank, 302 rods and buy the pistons to suit.
Clevo are known for bore stress due to the angle of the rod at BDC, with the longer rod it keeps it higher up the bore.

What are you using the car for?


So when you use the 302 rods is the stroke the same as a standard 351? 3.5 inch isn't it?


Yes. A 351C has nothing but a 3.5" stroke. 302 is 3".

You can use 351 or 302 rods but the pistons to suit a 302 rod costs twice as much as one to suit a 351 rod.

 

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Posted: Sat Apr 28, 2007 8:32 pm 
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Cool. When I bought my fairlane I got told that the motor was originally a 302 but had been stroked to 351. When I had to get a piston replaced the mechanics said that it had standard 302 rods in it so I just assumed that I had been told lies. Will measure the stroke one of these days. It seemed to go harder then the standard 351 that I also had.

 

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Posted: Sat Apr 28, 2007 8:37 pm 
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The 302 rod combo came in the mid 90's, back then there was only one company selling the pistons as a standard item, otherwise you had to get custom made.

I only built one of these with 302 rods, we ran the small motorsport cam with mildly ported 2V closed chamber heads and Edelbrock Performer manifold.
It went into a XY GT ute that my mate built and he sold it with 100 miles on the clock, i was spewing as we never got to find out how well it went.
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Posted: Sun Apr 29, 2007 9:51 pm 
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i have a 302c which im looking to convert to 351c.

im gonna get a351 crank, j[keep my rods, buy some custom pistons, new cam, timing chain, lifters.

pull out engine, swap all parts over and put some new gaskets in and see how it goes.

any help or ideas or problems i may encounter?

how much power you reckon ill get?
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Posted: Mon Apr 30, 2007 12:36 am 
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I'd be checking bores first mate.

Personally i wouldn't be pulling an old Clevo down and slapping pistons in without boring it.
At least get the bores checked for wear and make sure they're not ovaled or have too much of a lip.
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Posted: Mon Apr 30, 2007 9:10 am 
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Checked with my engine builder - As thought he has used hypertec pistons in mine with the 302 rods

Also - i have open chamber heads running roller rockers

If the car is going to be used for burnouts mainly in a corolla is it worth converting to 351? Or would the 302 be more than ample?
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