I think the mechanic might be right. Many of the standard MG midgets had a diff ratio that gave about 15 mph per 1,000 rpm. Here is a list of specs that should cover the range. Just check the tire size and diff ratio by rotating the prop shaft with a wheel jacked up. http://www.mgcars.org.uk/midgetspriteclub/sprite/sprite_speeds_ratios.htm I don't think changing the engine gear box will do much unless it has a good overdrive ratio. A higher ratio differential may be needed or larger diameter wheels if they fit under the body.
Graeme ----- Original Message ----- From: "Perry Jones" <[EMAIL PROTECTED]> To: <Biofuel@sustainablelists.org> Sent: Tuesday, September 20, 2005 8:08 AM Subject: Re: [Biofuel] engine swapping /was Debatable statement? > Speaking with the authority of complete ignorance, I would have to ask > why in the world your mechanic thinks the MG tranny would require 4k at > 60? Isn't it going to be 1:1 in 4th gear? If so, then you'd be looking > at less than 3k at 60. I forget but not over 2600 I don't think. Isn't > 1:1 going to be the same regardless? If 4th isn't 1:1 or very close to > it I'd be surprised but don't know about the old MGs. Can't really > comment on the Datsun/Isuzu combination. If you can make an old MG like > that work out you'll have one phenomenabulous little machine. > Perry Jones > > > bob allen wrote: > >>here is an engine swapping question for someone with more expertise than >>me (easily done); >> >>I can get a nicely redone 79 (?) mg midget without an engine. A guy >>apparently did a restoration job, then blew the engine. I had >>considered putting a vw diesel in it. My mechanic said he could >>manufacture the motor mounts/ do the install, but we have to go with the >>mg tranny, a four speed. After further discussions I asked what he >>though the engine rpm would be with this combination at 60 mph. He >>guessed abut 4000 rpm, which seems cranked up way to tight. I then >>though about a datsun/isuzu (if i could even find one) with >>transmission, but I fear this combination will be too heavy. any >>thoughts? >> >> >> >> >> >> > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (50,000 > messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 16/09/2005 > > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
