I asked John Espisiyo of Quantum Mechanics about A versus J. Here is
his resonse, followed by one on A type avaiability/price. I am sticking
with the`J till it goes.
"Hi and thanks for your inquiry. The J type is not as strong as the A type
and we don't build many J's for racing because of this. However, they can
be modified for heavier duty use by using P type internals and boosting the
pressure up to around 600 pounds. If your TR6 is pre 73 the A type would be
the correct one for your car anyway. Let me know how I can help as we do
this for many racers. A's can be built with either 22% or 28% ratios. The
J's can be built with 25%, 27% and 28% ratios. "
"Chuck - Yes, the A types are getting hard to find. I sell rebuilt A type
overdrive units for $1,075 exchange + $475 core. 22% is standard, 28% is
$200 additional. Racing prep is no additional cost as it can be done with
the same parts and labor time as standard. (as long as I know in advance
that is what you want) Units are bench tested and racing pressures are 600
PPSI instead of the standard 400 PPSI. I would offer your $175 each for the
J types as that is the going rate. Do you have all the other parts for the
A type transmission conversion/ car installation? (mainshaft, adapter
plate, eccentric cam, wire harness set, relay etc.) I have those parts as
well. (you can see them on my website). Let me know if you need more
information. Thanks! John
John Esposito
Quantum Mechanics Ltd.
505 Wheeler Rd.
Monroe, Ct. 06468
www.quantumechanics.com <http://www.quantumechanics.com>
Phone = 203 459 9612
Fax = 203 261 8497"
Charly Mitchel wrote:
>Everything I read states the 'J' type is superior. I've also heard the 'A'
>type can be built with better parts as such from Jags or other more powerful
>cars.
>I run a 'J' type in my 6 and have no problems with it.
>Charly
>TR6 #44
>----- Original Message -----
>From: "Jack W. Drews" <vinttr4@geneseo.net>
>To: <fot@autox.team.net>
>Sent: Wednesday, September 21, 2005 4:11 AM
>Subject: overdrive question
>
>
>
>
>>I've never gotten into the innards of the various types of
>>overdrives. Most people I know who race their TR's with an overdrive
>>use the "A" type.
>>
>>Is the "A" superior to the "J" type for racing?
>>
>>Why?
>>
>>
>>Thanks!
>>
>>uncle jack
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