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Arthur

hi guys. All talks about 1.5, 1.4 short stroke alu tu engines and such now got me thinking. The EC8 engines from China seems to be the same iron block as TU5 but with 92.5 stroke and 79 bore. 

 

Now I'm wondering how big one could go with the iron tu. With 84mm cylinder spacing, what would be the max bore for non turbo? Would one dare to go 81mm? 81 x 92.5 would make a TU9JP4 of 1906,5 cc 

 

New crankshaft with 92.5 stroke are available dead cheap.

Edited by Arthur

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welshpug

Why not start with a readily available XU ?

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Arthur
5 minutes ago, welshpug said:

Why not start with a readily available XU ?

Sure that would be possible. but I'm just wondering. And I just happen to like the TU setup. Maybe not logical, but oké. 

 

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SRDT

The crank may be cheap but importing the whole engine could save you a lot of time and effort.

Maybe the crank can fit inside a TU5 block, maybe you need special rods and a bit of work on the block or maybe you will grind your way to the outside of the block before it fits.

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Arthur

Yeah. Looking at pics of stoker builds there’s room left with 89 stoke. Whole EC8 was quite expensive but block and head looks the same.  So either they use shorter rods or lower ch pistons. Well, took the gamble and ordered the crankshaft. Guess I’m going to find out.

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