I need to replace a couple S4 N/A tension bolts(the narrow shank kind that look like they were made on a lathe). Should I go for the newer larger diameter smooth shank bolts? Would there be a problem with expansion/stretch coefficients? If I could afford it I'd just get all new bolts and not worry about it.



Thanks!

 

I would not mix the two styles. I have nothing other than a feeling that it would be bad mojo.



It just dosn't sound right.



Lynn E. Hanover

 

yah, its prolly ok, if its just one, but yeah bad vibes. not like tension bolts are hard to come by either

 

This begs the question. Which style is better for strength and durability? Narrow shank or thick shank?

 

i'm gonna like the 89+ ribbed style. its designed to rev a little higher

 

makes sense.

 

I didn't like the thought of it either, but I had to find out what others thought about it.

No bad mojo for me!

 

My '71-'73 engine came with narrow shank tension bolts that appear to have been made on a lathe. Can I switch to 1st gen RX-7 12A tension bolts?

 

i'm 99.99999% sure you can.

 

ribbed is good,,, ohh wait is this the X-rated forum?