Datsun Roadster Forum-311s.org

Greetings to all! I am new to the forum although I have enjoyed reading the posts(my wife calls it car porn!) for the past 2 years or so since I bought my 67 1600 from Mike Young. I am looking into stroking my 3 main motor and was wondering how much of my motor I can use. I know I will need the 1500 crank and rods but am not sure of which pistons,cam, or anything else that would be needed. Anyone with experience on this set up? From what I have read, it seems that the crank and rods(and bearings?)are scarce, and I know it would be easier to get a 5 main block and go to a 2l,but I like the idea of having something a little different. Any suggestions would be greatly appreciated.

This is only a guess on my part but here goes: You are simply changing the stroke with the crank and the rods so you should be able to use either the 2 liter pistons and rings or the H20(much cheaper)pistons and rings. You should have American Cams regrind a cam for you to make the motor perform the way you want. The top end you could use all of your stock stuff including the 1600 carbs. The H20 valves can be made to fit into a 1600 head. Scott 70MTroadster used H20 pistons, rings and bearings in his 5 main stroker. No problems what so ever. Dean of Fairlady Products has the 1500 bearings from what I have heard. Keep us posted.

Steve

Thanks Steve! That's the answer I was hoping for! Since we are heading towards the holiday season, I will have to wait and see how much Christmas hurts me this year. After that, I will attempt to see if anyone out there has a 1500 crank and set of rods that they may want to part with. A friend said to check the TWM website for some SU throttle bodies. Pretty sweet looking stuff! The FI components seem almost(?) affordable but the aftermarket ECUs that I have priced cost an arm and leg. I'm glad I can use my carbs! Thanks again!


Kent

You may have a problem here.
The different strokes of the available cranks - 66.8mm(1600), 74mm(1500), and 83mm(2000) all require a different length rod to work with the standard roadster piston.
The 1500 piston will not work because it is only 80mm bore.
1600 rod is too long, 2000 rod too short.
By my calculations you will need a rod about 149mm long to use with the stock roadster piston. Seem to remember reading somewhere that the 1500 rod is 144mm ? (same as 2000).
the 1500 "deck height" (distance between crank center and top of block) may be shorter than the R\U\H engines.

Rallye sells a kit for this stroker, but I don't know where they get the rods from.?

Maybe someone knows & can share?

Can anyone confirm 1500 rod length?

Does anyone have a measurement on the 1500 deck height?

Other than a 149mm rod, the only other way I can see to do this is a custom piston, in which case you can maximize your "squish" area for more power and efficiency.

I am also considering this engine using 1600 rods with custom pistons.
I have a head built, and it will flow more than enough air for even the best strokers. Air flow is not the problem some think it is with these engines (for street use). 150 horsepower should be attainable by airflow #'s.

The parts availability of the 5 main stroker makes it a much better choice in my opinion (for HP, torque and parts). The H20 forklift engine was being built up to about 1996 so parts will NEVER be a problem.
This is not to say I won't build the 1500 crank engine, just that the H20 makes more sense. Somehow I like the sound of "1800".

Daryl

Dan at Rallye said that he used the 1500 rods when he went this route. Because the head had been milled, he used dished R16 pistons but would consider using flat top pistons with a stock head . Can anyone confirm whether or not the 1500 rods would work and if not, any suggestions to what would?

Thanks and a Happy Thanksgiving to all!
Kent