95 pistons, big rods????

[gotswrv]

Okay, I've read about the get big rods, and the 95 pistons. But, that is about all I can find.

Why are the 95' pistons better???

What engines had the "big"(better) rods???

Are all 1st Gen 7 bolts still japan made? (not subject to the crankwalk scare)


Thanks for the help. Sorry if I didn't do a good enough job searching. I had alot of trouble trying to work around the search engine rules...

Sam

 

[PSI_Tom]

The rods changed when the 6 bolt was replaced with the 7, the 6 bolt rods are known as the "big" rods. Because the wrist pin diameter changed at the same time, the 95 (7 bolt) pistons won't fit on 6 bolt rods.

 

[gotswrv]

So with 1G pistons the "big" rods will work with either style engine?

Also, what got bigger? Or are they just heftier in general...

 

[NOSNUSE]

The actual "big" rod itself is thicker in the middle which helps it support more power. The 95' pistons have a little bit higher compression than the 6 bolt motors and earlier 7 bolt motors(7.8:1 versus 8.5:1). The "big" rod was made between 89 and mid 92 on both the turbo and non turbo motors. Later, Keith.

 

[91TSi FWD]

Here is how to install 2G pistons on 1G big rods.

 

[gotswrv]

Very good info! It's always nice to get real numbers to put everything into perspective. hundred thou would make for a much stouter rod. I thought it would be a marginial difference at best, now I see why people take notice.

Thanks again for the info guys.
Sam