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MG TD TF 1500 - Engine Rebuild for supercharger

In preparation for an XPAG complete rebuild with the resulting engine having a supercharger installed, what recommendations would you have? In other words, if money and time were no objects, what would you do differently (or again) to facilitate the best possible rebuild for the supercharger? Thanks
Michael

Michael - I'd call George Edney +44 181 508 9427
He has an excellent reputation and years of experience building XPAG engines for racing.
It's a long way from Seattle to Essex, England - but you did say 'if money and time were no objects'
John
tf HDC43 538
John Thomas

Hi Michael, I rebuilt my engine 2 years ago, standard rebuild no modifications except a 3/4 race cam. I put a shorrock supercharger on and changed the diff to 4.3. WOW!! What a difference! I now have a car that accelerates like a bat out of hell and can keep up with modern traffic with no problems and not at earth/engine shattering rpms. I suppose you could stage tune the car but why bother unless you plan on racing. Good luck and wait until you drive a supercharged TD for the first time ---truly a treat!!! Rob
Rob Silverman

Rob's comment brings a question to mind. I have heard that on a newly rebuilt engine, its better to break it in with the original carburetor set-up, then install the supercharger. The reason was that it is supposed to allow the engine to undergo less break-in stresses while still tight. Any comments?
Jim Merz

Hi Michael,

I agree with Rob and John. I've just wrapped up
installation of an Eaton blower on my TF and it
does indeed go like the proverbial "bat out of
Hell". All of the "special" bits came from George
Edney (some of them via Brown & Gammons who are
always very helpful). Here are some things you
should consider, in my opinion:

1. Shoot for at least 8lbs of boost. 10 lbs is
ideal and 12 lbs ok, but more than that brings
up other complications.
2.If $s were no object you'd have a new steel billet
crank and Carillo rods, shotpeened and nitrided.
If your old crank has never been turned you could
just get by safely with 10 under. Shotpeened,
nitrided, etc. Stock rods are ok: same as above.
Of course, everything has to be thoroughly crack-
tested, polished, balanced, etc. You need a very
competent and sympathetic engine builder.
3.You'll want an extractor exhaust manifold(less
the carb mounting extensions-these will be replaced
by the manifold you need for whatever blower you
select), special flywheel, bucket tappets and
corresponding pushrods, "731" cam, vernier timing
gear: all from George Edney or B & G.
4. Depending on your model you will want larger
valves and ideally a gas-flowed head, but keep
the compression ratio relatively low: no more
than 8.5 to 1.
5. The 4.3 diff becomes a necessity. Also new,
high-strength half-shafts or you will be breaking
the weaker ones.

There is more you can do, but this will get you
started. Good luck and go fast.

Reed

Reed Yates

Forgot to mention forged pistons as almost a
necessity, certainly 3-ring solid skirt.

Also, regarding Jim's query above, not necessary.
If the engine is correctly checked/dbl checked
with quality components by an expert assembler
then break-in on carbs is unwarranted. By the
same token, no amount of careful break-in will
make up for poor quality parts and/or indifferent
assembly.

Cheers,
Reed
Reed Yates

What are the opinions of the 'new' Moss Supercharger?
Brad Sullivan

What is the cost of the new Moss Supercharger?
Richard Olson

Anyone have info on Italmechanica superchargers built in the 50's. I have one, but can't read the Italian instruction manual, and am missing a few pieces.
Blake J.

Several year ago I ran across a MG Service Manual that was printed in Australia and in the "O" section were several pages devoted to Special Tuning for MG midget Engines. It has a wealth of info and specs on tuning engine to stage 5 / superchargers / methanol fuels, ect.
I does note in the text that "POWER COSTS MONEY"
colin stafford

I do not know the cost, it was just featured in the 'magazine' they send out. Have not seen it in catalog or flyer yet.
Brad Sullivan

I talked to Craig Cody a while back at Moss who said the expected price for the new blower will be about $2,500. That's subject to change of course by the time the actual sales are offered. FYI, it's Craig's car that is depicted in the Moss Motoring magazine. It has a three rotor configuration which provides a higher boost than the original Marshall Nordec with only two rotors. Looks like it could be a hot item.
Jim Merz

Moss also said that for about $500 more they will add the carburator shown.
Michael

Does anybody have experience with a Volumex blower? Who does the modifications. For what price do Volumex blowers go onto the market??Looking forward to your comments.
Bas de Voogd

This thread was discussed between 22/05/2000 and 11/06/2000

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