XC351

what's so good about 6" 302c rods in a 351? less loading on the wall's? less chance of splitting bores or what?

Chris Brooks

Longer rod and shorter piston = lower gudgeon pin angles which means less loading on bores and slower change of direction for the piston which means less chance of breaking gudgeon pins (anyone ever broken one?) and small ends on the rods. Also means that the piston spends slightly longer at TDC (and therefore BDC too) which in theory helps develop more torque although from what I gather it's only a small gain.

Basically if you are going to get new rods and pistons anyway and the compression that you'll end up with is suitable to your application, it's worth doing.

That's what I've been told although I've not run them myself before.

Chris.

__________________
Chris

There are two types of fools.
The first, who thinks that because it is old, it is good
And the second, who thinks that because it is new, it is better.

XC351

Chris, it would be interesting to hear from someone who's done it. Sounds good though

brenx

Check for the user name XBWGN. His old engine had 302 rods with a 351 crank. The 302 rod gives a better rod angle which means better (more rpm). A possible downfall I've heard is due to the deck height your limited on cams? I reckon thats a myth though.

351 with 302 rods also = more torque

Brenden

__________________
XB Fairmont (street car) 11.07@123.02mph.

XC351

will do

Chris Brooks

XR9UTE has also done it.

__________________
Chris

There are two types of fools.
The first, who thinks that because it is old, it is good
And the second, who thinks that because it is new, it is better.

TTNOS8

Have done and a definate noticeable difference is how freely the engine revs now.

Feels a bit more torquey.

But one main bonus was the safer revs around the 5500 to 6500 rpm range.

clevo

I don't think there are as many pistons brands for this setup 6 inch rod 351 crank, Keith Black makes a piston anyone know any other brands?

Paul

I_wanna_XA

Acl does... also in hypereutic so it should be decent strength but cheap.

65pickup

hypatec also make set of pistons for the 6inch rod quite cheap too (about $375) Compared to ACL (about $500) although most people opt for ACL due to reliability