I don't know if this will help or not, but I rebuilt my TR4A's engine
to factory spec and impilimented the competion manual's suggestions for
the "D" Rally cam. I also ported and milled the head (to achieve 10:1
compression - don't know if your TR4's has that much metal, 0.25",
milled the fly wheel and balanced the engine. I experienced a rocket
compared with what I had and only gave up 4 MPG.
David G. Whitelaw
66 TR4A (being restored)
78 Spitfire (RIP - parts car for sale)
--- Fred Thomas <vafred@erols.com> wrote:
>
> Ken Gallanders at Brit. Frame & engine has 89mm.
>
> Brian Sanborn wrote:
>
> > On Tue, 17 Aug 1999 11:16:53 EDT Johntr6@aol.com
> wrote:
> > >
> > > I'm the guy what started the 4vs6 string a month
> ago. I'm looking to do a
> > > engine rebuild this winter - and who knows what
> else - and want to start
> > > with the 87mm pistons. British Parts NW is
> offering a kit in the VTR
> > > magazine for $410 versus the $590 or so in Moss,
> TRF etc. Man on the phone
> > > at BPNW says piston heads are german (Mass?) and
> the rest is English, with
> > > three rings, and more advanced than the
> Hepolites recommended years ago inn
> > > the TR4 Comp Prep manual. Does anyone have
> experience with these? I've not
> > > bought before from BPNW, but I read that many
> listers use them regularly.
> > > Thanks in advance. I'm sure I'll be back with
> much more before this is
> > > done.
> > >
> > > John
> > John,
> >
> > First of all... you will find that Moss and TRF
> don't necessaryly have stock for the 87mm parts.
> >
> > I used the BPNW 87mm piston liner set in my TR4
> engine rebuild last winter. I have 1,100+ miles on
> the car now and the engine strong and smooth. I
> think the german pistom mfg compant Mauhle.
> >
> > The pistons look different than AEs I took out...
> that were 15+ years old.... but were better
> according to my racing engine building machine shop
> owner.
> >
> > It up to you. In my case BPNW had the only 87mm
> solution and they worked out fine.
> >
> > Brian Sanborn
> > 62 TR4 CT16260L - Groton, MA
> > sanborn@net1plus.com
>
>
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