emcon5

Hi Steve, by "big bore" do you mean 98mm, or does this apply to 95mm as well?

We still haven't got an answer out of Schuey, but I think he is talking about a 95mm set from a 3.2 Carrera.

Tom

Steve Weiner-Rennsport Systems

Hi Tom:

This applies to 95mm-98mm-100mm-102mm bore sizes.

I HOPE Schuey was talking about the 98mm slip-in high-compression version,....

As you wrote, the Carrera P/C's require a custom rod bushing as the piston pin sizes are different.

Schuey

Steve,

I'm going to ask if these are the 98mm ones...I'll get back to you on this...

Schuey

r911

Let me just add a bit to this:

The need to twin-plug depends on the comp. ratio (actual), the size of the chamber (i.e. diameter), the quality of the gas, and the altitude (pressure). I suppose the very worst place to run your car would be Death Valley on a very cold day... Also consider that if you live at high altitude you may someday tour down lower...

Buildup inside the cyl. will increase the actual comp. ratio and may also serve to provide a substrate for initiation of pre-ignition.

So be sure to leave yourself some safety factor -- you won't be able to measure or calcualte all the above exactly. The rule of thumb estimates usually have a safety factor built-in.

Schuey

found out they're 95mm...looks like they won't work for me...thanks for the help guys!