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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