Pat,
The rear end on the early Marcos cars was out of a Ford Cortina. I'm not
sure what other cars it might have been fitted to. Some Lotus 7's also used
these rear ends. Several ratios are available. Personally I have tried the
numerically lowest three. My Marcos came with a 3.9 to 1 which gives great
acceleration with a stock engine. With a modified engine this ratio is a little
low for normal driving. The next ratio in sequence is a 3.77 to 1 and I have
this ratio in my car at the present time with a highly modified engine. I really
like this ratio for my car because the acceleration (with a modified engine) is
still excellent and still gives a top speed (theoretical and in Overdrive) of
146 mph at 6500 rpms with the tires and wheels on my car. My car cruises easily
in the 80 to 90 mph range at between 3600 and 4000 rpms (approximate and in
Overdrive). The next ratio in sequence is the 3.55 to 1 and I have one of
these as well. My modified engine still had great acceleration with this ratio
but the cruising numbers were rather bizarre. As I recall, 60 mph was reached in
under 3000 rpms and 90 mph (in od.) came at 3800 rpms. I'm not sure what the
theoretical top speed would have been ;because there is no way that my
engine would have enough power to reach 6500 in O.D. with this ratio. In
fact, from my experience with my car and engine, the top speed would have
been about the same but with the 3.77 reaching top speed quicker. So the
3.55 to 1 might be nice if you plan on driving across country on the interstates
but is a little much for the normal car. The other ratios that are "available"
are 4.11, 4.44, 4.7, 4.9, 5.1, and 5.3. Some of these ratios were built by
the factory but hard to find when looking to buy.
There are several potential sources in the USA for parts or
for complete differentials. Dave Bean Engineering in San Andreas, CA, and
Rapid Motion in Danville, CA are but two that I know of where I don't have to
look up the names but there are others as well.
If you have any other questions that I can help with please call me at 831
661-0875
Mike Denman
Chassis #4079
----- Original Message -----
From: Don LattimerSent: Monday, June 02, 2003 9:12 AMSubject: [MarcosManiacs] Re: Rear differentialsPat,Mike Denman would be the one to contact regarding differentials. He's had lots of experience with different ratios. My V6 has a Corsair rear end (Banjo type) with 3.77:1 ratio. I think the innards are like a Cortina rear but not positive.Mike???Don Lattimer#3m5759----- Original Message -----From: patemery@...Sent: Sunday, June 01, 2003 6:42 AMSubject: {SPAM} Re: [MarcosManiacs] New TS500Don!
I was once told that the Salisbury differential unit (with bolted cover visible from the rear) has 3.58:1 ratio and that no other ratio is available. Apparently, some Marcos are equipped with a "Banjo" type differential (no cover plate) for which higher gear ratio ( lower numerically) are available. Are these units the same as Falcon, Mustang, German Capri, Maverick, with 8" ring gear? Has anyone experienced changing gear ratio? I would like to learn from their experience.
Pat 3L5365>
> From: "Don Lattimer"
> Date: 2003/06/01 Sun AM 12:54:31 EST
> To:
> Subject: [MarcosManiacs] New TS500
>
> Marcos has announced the TS500 which is a V8 powered TS250. Puts out 320 HP and 350 lb.ft of torque. All in a 1025kg car!!! Price is 35k pounds. I want one!
>
> http://www.pistonheads.com/news/article.asp?storyId=6805
>
> Don Lattimer
> #3m5759
>
To unsubscribe from this group, send an email to:
MarcosManiacs-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Marcos has announced the TS500 which is a V8 powered TS250. Puts out 320 HP and 350 lb.ft of torque. All in a 1025kg car!!! Price is 35k pounds. I want one!Don Lattimer#3m5759
To unsubscribe from this group, send an email to:
MarcosManiacs-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
To unsubscribe from this group, send an email to:
MarcosManiacs-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.