Guys,
I went and spoke to Chris Milton Engine Developments (prominent Adelaide
performance shop) today and they told me they have just rebuilt a RB30ET for
a customer, and were unable to source RB30ET pistons from ACL, they had to
use ~flattops (from a VG30 I believe) ACL basically do not want to know
anything about applications which might cause them problems, ie forced
induction. Milton's agreed that it was a good point to try and use pistons
from a factory turbo motor due to the fact that they would be designed to
withstand boost straight out of the box, but said that there wouldn't really
be much benefit over N/A cast pistons given that even if you went to the
greater expense of using a factory piston (no ACL stuff available) from a
different manufacturer/motor and modifying it to suit, you'd probably damage
both types (hole one/drop a ring/otherwise) in practically the same time if
mistreated. From talking to Andrew Smith about his suck-through 300hp+ L20b
turbo that he runs stock ACL cast pistons in with 25psi of boost, it seems
that the most cost effective (ie sensible) option is to use stock cast
pistons (which are only $215 RRP with moly rings from ACL for a 4 cylinder)
and spend lots of time and effort on tuning & controlling detonation (which
really should be done anyway of course!)
That's all the info I've put together so far, it'd be really good to hear
other thoughts too!
Cheers,
- Tom
> Do ACL make their pistons to the same quality as factory?
> By that I mean if you bought genuine Nissan RB30ET pistons or Starion
pistons
> from Nissan or Mitsubishi, would they be stronger than the ACL ones?
>
> zac
>
> > What's wrong with the starion pistons...
> > according to guys who race starions in their Group A days, the standard
> > pistons are good for up to 330 odd hp.
> >
> >
> >
> >
> >
> > Daniel Kroehn wrote:
> >
> > > Yeah the bore is the right size Errol, but I checked the ACL catalogue
> after
> > > Tom's reply last night and sure enought the comp height is 32.10mm on
the
> VL
> > > turbo pistons and 38.10mm on standard L18 pistons. So I think I'll
have to
> > > do some more searching.
> > >
> > > Daniel Kroehn
> > > Recommending Datrats, supplying quality Datsun performance parts
> > > www.Datrats.com.au
> > >
> > > ----- Original Message -----
> > > From: Errol Smith <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Tuesday, June 05, 2001 7:32 AM
> > > Subject: RE: A question of pistons
> > >
> > > > Daniel,
> > > > The VL turbo pistons are 86mm stock so this is a 1mm overbore for
the
> Z18.
> > > > The comp height is about right though with a bit of the top I am
told.
> > > >
> > > > Cheers
> > > > Feral Errol
> > > > mailto:[EMAIL PROTECTED]
> > > > http://www.datrats.com.au/
> > >
> >
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