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Re: Supercharger

To: MG List <>
Subject: Re: Supercharger
From: Max Heim <>
Date: Sun, 10 Feb 2002 13:08:15 -0800
Well, the first question is, can you get pistons for anything more than a
.060 overbore? 

on 2/9/02 4:55 PM, Jerry Erbesfield at wrote:

> David is going to an overhaul his engine anyhow - so while he's got the
> engine out and he's in there anyhow, the re-bore is NOT that much more of a
> chore or cost, even if it has to be sleeved to achieve the .060. In many, if
> not most cases, a rebore of at least some amount is normally required anyhow
> on a worn engine to true the cylinders and to really do a decent, tight job.
> So, if it'll make .060, it wont cost him any more to go that much than it
> would to go .20 or .040 over.
> Let me throw something else out there just for the fun of it...... IF, just
> IF now - If you were going to go to all this trouble anyhow, and if you
> wanted to max the bore to the most that it could possibly be by putting in
> sleeves, which I KNOW can be done, because I've seen sleeves successfully
> done before, what would be the maximum over-bore that could be achieved
> considering cylinder head, head gasket and any other considerations? What
> are the other considerations? Has anybody on the list ever had any
> experience with MORE than an .060 overbore?
> And, - just for the Hell of it - Does anybody make pop-up pistons and has
> anybody tried them?
> Yes. Over-boring does not show and is considered a normal repair method for
> older cars with worn engines, so stock classification should still
> stand - - -  unless you are at an NHRA drag meet, get protested and they
> make you tear it down for inspection!!! However, I've personally never seen
> an MG drag racing before - and I've seen a LOT of drag racing!
> -Jerry Erbesfield
> 73 B Black Beauty roadster
> website-
> -----Original Message-----
> From: []On
> Behalf Of Andrew B. Lundgren
> Sent: Saturday, February 09, 2002 5:19 PM
> To: David Councill; Jerry Erbesfield; MG List
> Subject: RE: Supercharger
> Interesting perspective.  I would consider a 4 hour kit install less of
> a mod than a .060 overbore.  The overbore is much harder to reverse...
> (If you ever chose too, but then again, you can't see the overbore can
> you...
> On Sat, 09 Feb 2002 13:49:58 -0500, Jerry Erbesfield wrote:
>> I personally believe increasing the bore as much as possible is very
>> important. There is NO better or more cost effective way of boosting
>> performance, which is so needed on our MG's and that doesn't affect the
>> vehicle remaining "stock" (like wouldn't be the case with adding a
>> supercharger). If you were to try the .060 overbore and then discover that
>> you would have to "sleeve" the cylinders to successfully achieve it, that
>> wouldn't be such a bad thing, IF the person you have doing the work is
>> capable. The cost for sleeving is affordable (at least it was through my
>> person).
> --
> Andrew Lundgren


Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires

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