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Total 13 documents matching your query.

1. OD transmissions on ZA MG (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Sat, 07 Oct 2000 15:36:20 -0700; While looking for the MGB power curve for Bob, I found a repinted article in a Brooklands Book. The article dealt with the H.R.G.-Derrington cylinder head on the Magnette. What was more interesting; /html/mgs/2000-10/msg00411.html (8,134 bytes)
2. Re: OD transmissions on ZA MG (score: 1): Author: Charley & Peggy Robinson <ccrobins@ktc.com>; Date: Sat, 07 Oct 2000 22:22:54 -0500; Hmmm, those final drive ratios come out to a ~25% overdrive, instead of the ~20% we're used to seeing. Wonder where they got it. Hope someone knows. CR; /html/mgs/2000-10/msg00432.html (7,593 bytes)
3. Re: OD transmissions on ZA MG (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Sat, 07 Oct 2000 22:49:47 -0700; Anyone out there in ether net land ever know of any BMC vehicle made in the fifties factory equipped with the 1500cc/1622cc B series engine and overdrive? Anyone know of any BMC 1500cc/1622cc B seri; /html/mgs/2000-10/msg00435.html (7,781 bytes)
4. Re: OD transmissions on ZA MG (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Sat, 07 Oct 2000 22:55:18 -0700; They also state that the 4.55/1 car did 85.8 MPH at 5250 RPM and the OD car did 90 MPH at 4400 RPM. Does that still work out at ~25% reduction? Blake; /html/mgs/2000-10/msg00436.html (7,638 bytes)
5. Re: OD transmissions on ZA MG (score: 1): Author: Barney Gaylord <barneymg@ntsource.com>; Date: Sun, 08 Oct 2000 00:30:39 -0500; Normanville overdrive added." The standard ratio was 4.874/1 without the OD and 3.68/1 with. the ~20% we're used to seeing. Wonder where they got it. Yup. That's a 4/3 step down. car did 90 MPH at 44; /html/mgs/2000-10/msg00439.html (8,620 bytes)
6. Re: OD transmissions on ZA MG (score: 1): Author: Barney Gaylord <barneymg@ntsource.com>; Date: Sun, 08 Oct 2000 00:22:52 -0500; car did 90 MPH at 4400 RPM. Does that still work out at ~25% reduction? No. THAT works out to 5/4 ratio, or a 20% reduction in engine speed. Barney Gaylord 1958 MGA with an attitude http://www.ntsour; /html/mgs/2000-10/msg00440.html (8,049 bytes)
7. Re: OD transmissions on ZA MG (score: 1): Author: Charley & Peggy Robinson <ccrobins@ktc.com>; Date: Sun, 08 Oct 2000 08:24:34 -0500; No, that works out to ~20% reduction. However, the non-OD final drive ratio in this example (4.55:1) is different than in the former one (4.87:1). Did they test more than one car? Cheers, CR; /html/mgs/2000-10/msg00444.html (8,040 bytes)
8. Re: OD transmissions on ZA MG (score: 1): Author: "David F. Darby" <darby@tri-lakes.net>; Date: Sun, 8 Oct 2000 09:24:12 -0500; car did -- -- The ZA utilized a 4.875:1 rear axle ratio. After a whopping 10% horsepower boost in the ZB, the 4.55:1 was introduced. While the factory might have played around with OD, I've never see; /html/mgs/2000-10/msg00448.html (8,571 bytes)
9. Re: OD transmissions on ZA MG (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Sun, 08 Oct 2000 14:26:06 -0700; Two different cars as the one with the 4.55/1 axle is listed as a ZB while the HRG head OD car with the 4.875/1 axle is listed as a 1954 ZA . Tire size is not mentioned. An "Autocar" Magnette road t; /html/mgs/2000-10/msg00468.html (7,868 bytes)
10. Re: OD transmissions on ZA MG (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Sun, 08 Oct 2000 14:05:24 -0700; Yep! Same article, same table. Blake <<<snip>>>; /html/mgs/2000-10/msg00469.html (7,760 bytes)
11. Re: OD transmissions on ZA MG (score: 1): Author: Charley & Peggy Robinson <ccrobins@ktc.com>; Date: Sun, 08 Oct 2000 20:22:42 -0500; OK, that explains why some of the numbers don't match. My question: Was there a L d'N OD with a 25% reduction?; /html/mgs/2000-10/msg00486.html (8,869 bytes)
12. Re: OD transmissions on ZA MG (score: 1): Author: Phil Bates <jello@ida.net>; Date: Sun, 08 Oct 2000 19:43:35 -0600; To steal from GW Bush (but not to in any endorse any current candidate) I think this is fuzzy math. It is not a 25% reduction, it is a 20% reduction, just like the MGB OD trans. You have the numbers; /html/mgs/2000-10/msg00488.html (9,721 bytes)
13. Re: OD transmissions on ZA MG (score: 1): Author: Charley & Peggy Robinson <ccrobins@ktc.com>; Date: Mon, 09 Oct 2000 13:12:46 -0500; Hi Phil, You must have the msgs mixed up. I said that the example of with the rpm vs speed was a ~20% reduction. The earlier example with the ~4.87:1 final drive was ~25%. CR; /html/mgs/2000-10/msg00519.html (7,542 bytes)

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