Originally posted by itmanta:
How can the SCCA do that? Pure B.S. I tell you.
The only way they are suppose to do this is if the documentation shows that the models and years in question had 7.6:1 compression from the factory. I know very little about Opels, but if there is factory documentation that shows the specifications were otherwise, you need to gather it and send it to the Technical department along with a letter explaining the error.
I went back and looked, and the ITAC received a letter way back last March asking that the specifications be corrected for valve sizes and compression. The CB was suppose to validate the data and correct it. They seem to have found something that caused them to change their minds. One can't really assume what that might have been, so the prudent thing to do would be to get whatever information you have that shows the factory compression ratios for all the years in question and send it to the appropriate people.
If the factory documents do indeed show the compression ratio as 7.6:1, then surely you must have questioned the change to 9.0 in the first place, and a red-flag would have had to been raised in your brain saying 'there is a conflict here... I should double check this before spending $2000'
Sorry, but the CRB, BoD, and ITAC can't possibly know the specs for EVERY car out there, and mistakes do get made when dealing with this much data... That's why you are required to have the factory manual for your car...
If the data exists to validate the compression ratio, I suggest you gather it and send it in with a letter to correct the correction. You'd be suprised how persuasive the correct documentation can be...
Feel free to contact me with any questions...
Good Luck,
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Darin E. Jordan
SCCA #273080, OR/NW Regions
Auburn, WA
ITS '97 240SX
run alternate pistons with any profile i.e. dished/domed, etc to raise compression. The rules aren't like IT in which the exact same configuration/shape/type/etc are specified.