Well, I think I'm going for a reasonably serious turbo engine setup with the
ability to rev to at least 7 grand, so I'd rather be on the safe side than
have to rebuild an engine. What brands of cast pistons do you recommend?
Daniel Kroehn
Recommending Datrats, supplying quality Datsun performance parts
www.Datrats.com.au
----- Original Message -----
From: Brad HALLETT <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, March 17, 2001 4:07 AM
Subject: RE: Z18/Z20, Forged pistons
> Don't get me wrong, some street and light motorsport applications will be
> best suited by hypereutectic due to their lower friction, just don't
expect
> too much in revs/compression
>
> Regards
> Brad HALLETT
> http://www.powerup.com.au/~bhallett
>
> http://www.datrats.com.au for all Datsun performance equipment!
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel Kroehn
> Sent: Friday, 16 March 2001 3:00
> To: [EMAIL PROTECTED]
> Subject: Re: Z18/Z20, Forged pistons
>
>
> Thanks for setting me straight Brad, me thinks I have to rethink what
> pistons to buy!
>
> Daniel Kroehn
> Recommending Datrats, supplying quality Datsun performance parts
> www.Datrats.com.au
>
> ----- Original Message -----
> From: Brad HALLETT <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, March 16, 2001 2:06 AM
> Subject: RE: Z18/Z20, Forged pistons
>
>
> > Daniel
> > Th hypereutectic pistons gets its name from the higher levels of silicon
> in
> > the alloy. This level of silicon actually makes the piston weaker than
> cast
> > in high po applications. The only benefit of them is having less wear
> > characteristics i.e. less friction.
> >
> >
> > Regards
> > Brad HALLETT
> > http://www.powerup.com.au/~bhallett
> >
> > http://www.datrats.com.au for all Datsun performance equipment!
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel Kroehn
> > Sent: Thursday, 15 March 2001 2:32
> > To: [EMAIL PROTECTED]
> > Subject: Re: Z18/Z20, Forged pistons
> >
> >
> > Tom,
> >
> > since you are turboing your engine just putting a little more boost
> through
> > the sucker will probably have the same effect as the extra little bit of
> > displacement. Check with some performance shops about the pistons. I
> know
> > for about 350 - 400 bucks you can get yourself a nice set of high
silicon
> > content pressure cast pistons that will be a lot stronger than normal
cast
> > pistons. From memory they are called Hypueretectic (something like
that)
> > pistons. Could you put some shorter rods in it instead of the Z20E
ones?I
> > know my old rally engine has toyota 18R rods and some breed of flat
tops,
> a
> > standard l20 crank (I think) and a little boring to give just over 2.2.
> > Might pay to look for a rod catalogue and find something to meet your
> needs.
> > Just some food for thought anyway.
> >
> > Daniel Kroehn
> > Recommending Datrats, supplying quality datsun performance parts
> > www.Datrats.com.au
> >
> > ----- Original Message -----
> > From: Tom Richardson <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Thursday, March 15, 2001 11:23 AM
> > Subject: RE: Z18/Z20, Forged pistons
> >
> >
> > > Thanks for the replies Brad, Daniel, Mark
> > >
> > > The reason I'm asking about forged pistons is not because I am keen to
> > blow
> > > $1400+ or think I'm going to be running 25psi of boost on the street,
> it's
> > > because if I were to pursue a Z22 stroker with the long Z20E rods (to
> > > reclaim some revs) there is no piston available which produces the
right
> > > compression ratio with the NAPS/Z cylinder head (or even one which
> > produces
> > > a realistic N/A compression ratio). I need something with a 28mm
height
> > and
> > > 15cc dish. What other options are there besides custom forged
pistons?
> > Does
> > > anybody know of an OEM cast piston with a 28mm height and 15cc dish?
> > 2187cc
> > > turbo would have been sweet but I'll stick with a set of 31.6mm ACL
cast
> > > pistons with chromoly rings for $215 and 1998cc if the only other
choice
> > is
> > > exy custom pistons.
> > >
> > > Thanks again guys
> > >
> > > - Tom
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Brad HALLETT
> > > Sent: Thursday, 15 March 2001 2:35 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: RE: Z18/Z20, Forged pistons
> > >
> > >
> > > Precision do 'em (http://apep.alphalink.com.au/), excellent piston at
> the
> > > right price. I would order them through Datrats though to ensure you
> get
> > > the best $$$.
> > >
> > > Many people disagree with forged pistons, and it basically falls back
> onto
> > > what you expect from your motor. If you want twin turbos but only
> around
> > > the street at low to mid psi then maybe you will survive with cast
> slugs.
> > > If you want a reliable 6500rpm-9500rpm high comp performer then go to
> the
> > > expense of forgies. Don't spend a mint on an engine and have a piston
> > self
> > > destruct at the worst moment.
> > >
> > >
> > >
> > > Regards
> > > Brad HALLETT
> > > http://www.powerup.com.au/~bhallett
> > >
> > > http://www.datrats.com.au for all Datsun performance equipment!
> > >
> > >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of mark
krawczuk
> > > Sent: Wednesday, 14 March 2001 11:40
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Z18/Z20, Forged pistons
> > >
> > >
> > > Hello Tom
> > >
> > > >
> > > > What I wanted to know was, has anybody had custom forged pistons
made
> to
> > > > order? Where from, and how expensive were they? Alternatively, does
> > > > anybody know of an OEM piston of this size (87mm bore) with 21mm
> > > > wristpins?
> > >
> > >
> > >
> > > hi, i got a price on +1mm forged pistons for a l20b motor , and th e
> guy
> > > quoted me $1400, yeah right, the guy seemed a wanker,saying that
forged
> > > pistons are the only way to go, ESPECIALLY for a turbo.
> > > i spoke to a guy in queensland who ONLY DOES TURBO STUFF and when i
> > asked
> > > him about using forged pistons, he said f**K that, he has never used
> > forged
> > > pistons, and at the moment he said he was doing a v8 ford with twin
> turbos
> > > using CAST pistons.....
> > >
> > >
> > > my setup is : z2.4 crank, l20b block,z24 head,microtech digi 1,to3
> > turbo,
> > > and programmable ignition and CAST pistons ,which i am definately
using.
> > >
> > > he said the that u have to be very carefull about leaning out the
fuel
> > mix,
> > > (as with any car) if its too lean it will damage the pisons , and a
> > > forged set will last about 7 seconds longer than cast if the motor is
> > > leaned out.
> > > >
> > >
> > >
> > > mark
> > >
> > >
> > >
> >
> >
>
>
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