Quote:
Originally Posted by Spumato
Use High-Flow CIS
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This is an exercise we are looking at right now and this thread is very interesting.
I would like to understand more about a high flow CIS and what this implies.
If you look back through old articles you will find that Max Moritz in Germany developed a 3.0SC with 180BHP to produce 215BHP.
I know that they fitted their own design of pistons manufactured by Mahle to increase compression and I believe that they also fitted a Micro Dynamics Rising Rate Pressure Regulator but I have not found many other details.
We are building 2 Rally Cars both which will use CIS and we are hoping to obtain about 235 BHP.
We will start with pistons which we will have manufactured at Omega and then experiment with rising rate pressure regs as Micro Dynamics no longer have stock of the units they used to make.
Cylinders may be an issue at 98mm but I guess that they can always be made.
If we have enough budget then Mahle Motorsport seem to make these parts already.
I have read that some of the 928 Fuel distributors have been modified to improve fuel delivery at the top end but without affecting the idle/bottom end but I can't find out how this is done and haven't spent enough time trying to understand the system until now.
Any ideas would be helpful.
Cylinders are more interesting and 98mm is a good idea but I think we will use a rod that uses a 3.0 size pin rather than a 3.2 style rod.
I think that cams are interesting and it seems that there are some cams that work better than a 964 part but again would be interested in learning more.