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| Doug Siegel Join Date: Oct 2007 Location: Bloomington, IN 
					Posts: 314
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				transmission and gearing questions
			 
			I've been told that there a couple of remedies for the strange gearing of the 930 4-speed. I don't want to spend 10k on installing a g50. Where I live there are great twisties, the gearing plus the high rpm turbo spool makes this car a dog on these roads. My previous car, an 88 carrera was far easier to race. I am doing the necessary engine work, but the gearing, I think must be changed. I would love some input. Thanks.
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|  11-07-2007, 06:23 PM | 
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| Registered | 
				__________________ 2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) | ||
|  11-08-2007, 06:26 AM | 
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| Registered Join Date: Jul 2003 Location: Glorious Pac NW 
					Posts: 4,184
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			I love the way my car drives with these ratios:  Few caveats: I don't have 6 speeds, it's only the spreadsheet that does. Rolling diameter of my tires is about 4.3% smaller than the calculation. I now have a rev limiter (and ARP rod bolts) - so I don't rev to 7,000 
				__________________ '77 S with '78 930 power and a few other things. | ||
|  11-08-2007, 07:02 AM | 
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| Doug Siegel Join Date: Oct 2007 Location: Bloomington, IN 
					Posts: 314
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			Thanks guys. It was just what I needed. Doug 88 blk 930 00 bmw k1200rs | ||
|  11-08-2007, 10:01 AM | 
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| Registered Join Date: Dec 2004 Location: Danville - CA 
					Posts: 1,259
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			I've actually got a excel workbook that will let you input alternative ratios and and see what the resulting mph/rpms looks like.  Drop me a note and I'll send it along. I am in the midst of the same decision myself. 
				__________________ Rob Montgomery '88 Blk/Blk 930 ('Lucy') - Not Stock & Not Running | ||
|  11-08-2007, 04:49 PM | 
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