Datsun Roadster Forum-311s.org

I'm planning on building a stroker from a R16. Can connecting rods from another engine/source be used for this setup? Already have a U20 crankshaft that will be modified to fit. I'm toying with the idea of cutting the skirts of the R16 dome pistons and using those. Any ideas/suggestions on the whole stroker thing? I read the writeups online a few times.

Thanks! I'm new to this forum and to the 311's.

You can use either H20 or U20 rods. The H20 might be the way to go as they are quite a bit lighter than the U20 rods. You also won't be winding the engine to 7k+ rpm. The U20s are far stronger but much heavier as well.

Will

Thanks! I wasn't sure if the H20's would work. Any potential sources for the H20 and U20 rods?

Any ideas/suggestions on the pistons?

call up any fork lift place that has nissan parts. they have shortlbock sometimes!!
I would use the h20 rod and piston and find a r16 head that has been shaved to much...that i happen to have but i don't know if im selling yet, pm if you are intrersted.

teh h20 piston (5cc dish) with the head cut to much would be around were the u20 is in compression i believe, anyone on this?

Steve

Don't want to shave the head too much; already have to shave my own head! That is why I was thinking on cutting the skirt of the dome pistons. Has anyone tried this before?

How much weaker are the H20 rods compared to U20's? I would guess that the H20's have to be fairly strong for industrial applications. Thanks for all the feed back!!

Stock U20 pistons are flat tops and require no machine work to be used in a stroker. With the 1600 domed pistons, you may have compression issues for street use, but I don't know for certain.

Thanks Sid! I guess I was only thinking of the cleareance issues with the crank and forgot about compression. Would a copper gasket help? I think they are thicker than regular ones and last longer. Supposedely they can also be layered.
Would valve clearence also be affected?

A stock r16 has problems with comppresion already a stroker WILL have problems. Using the flat tops or dished, you will have more valve clearance.

Steve

What kind of compression problems for a stock R16 and a stroker? Too high/low? If you use flat tops for a stroker, do you still have to shave the head and/or block? Does does cause any side effects/problems?
Sorry, I have more questions than answers!

Francisco

if yo use flat tops you don't need to shave the head, it should be just right.

Steve

If you run R16 pistons in a stroker, you are looking at 11+:1 compression. Talk about needing race fuel. The U20 flat tops are the way to go. They will get you about 9.6:1 ish.

Will

Hey,

I'm running H20 rods and .020 over dished pistons in my stroker. We shaved the block to compensate for the dish, then when we ported and polished the head we shaved it a bit. Even with my timing off a tooth the idoit thing runs strong.

Denis

Can the H20 rods take 6000 rpm?

I'm no expert, but I am aware of many street and race engines running H20 rods that happily exceed 6000rpm.

Deleted post added elsewhere, sorry for the confusion.