Daniel,
If your only planning on running that much boost you could run standard
compression no problems.
I run a stocky bottom end around town on 15psi all day long.
Make sure youve got a decent i/c and everything else setup o.k and around 8:1
8.5:1 compression would be ideal.
Steve.
Daniel Kroehn wrote:
> That leads me to a new question. What would be a good comp ratio for a
> turbo engine that has up to 14psi of boost fed into it. I've checked with
> Corky Bell's book but the section on compression ratio is extremely open
> ended, so I'm a little confused at the moment at what will offer good
> detonation resistance as well as off boost driveabilty. Most of the time
> there will only be about 7psi going into the engine, only reaching high
> boost occasionally.
>
> Very confused,
>
> Daniel Kroehn
> Recommending Datrats, supplying quality Datsun performance parts
> www.Datrats.com.au
>
> ----- Original Message -----
> From: Daniel Kroehn <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, June 05, 2001 12:20 PM
> Subject: Re: A question of pistons
>
> > Nothing is wrong with them at all James, just the compression ratio may be
> a
> > tad low for off boost engine response for a streeter, but I haven't rules
> > them out yet at all. I don't doubt for one minute that they are more than
> > strong enough. I'm just trying to get a bit of a short list of potential
> > pistons going and then decide from there. Thnaks heaps for the advice.
> >
> > Daniel Kroehn
> > Recommending Datrats, supplying quality Datsun performance parts
> > www.Datrats.com.au
> >
> >
> >
> > ----- Original Message -----
> > From: jamesf <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Tuesday, June 05, 2001 11:30 AM
> > Subject: Re: A question of pistons
> >
> >
> > > 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/
> > > > >
> > > > > -----Original Message-----
> > > > > From: [EMAIL PROTECTED]
> > > > > [mailto:[EMAIL PROTECTED]]On Behalf Of James Cox
> > > > > Sent: Monday, June 04, 2001 6:28 AM
> > > > > To: [EMAIL PROTECTED]
> > > > > Subject: Re: A question of pistons
> > > > >
> > > > >
> > > > > Well not surprising, the VL Turbo is a NISSAN motor :)
> > > > >
> > > > > >
> > > > > >List,
> > > > > >
> > > > > >within the next month I am looking at rebuilding the short motor
> for
> > my
> > > > > >Z-18et project. Someone a while ago mentioned that VL turbo
> pistons
> > have
> > > > > >the same/close to pin height and same bore diameter as stock Z-18et
> > ones,
> > > > > >can anyone confirm this? I see these as a good piston to use for a
> > street
> > > > > >car without having to go to the expense of forgies as there is a VL
> > turbo
> > > > > >running around with 357kW at the back wheels and stock internals!
> > Its
> > > > been
> > > > > >pretty reliable as I understand it. Comments/suggestions would be
> > > > greatly
> > > > > >appreciated as this is a subject I'm a little hazy on.
> > > > >
> > > > >
> > _________________________________________________________________________
> > > > > Get Your Private, Free E-mail from MSN Hotmail at
> > http://www.hotmail.com.
> > >
> > > --
> > > ________________________________________________________________________
> > >
> > > James Fitness
> > > Director
> > > Data Scribe Australia Pty Ltd
> > > http://www.datascribe.com.au
> > > Computers and Supplies
> > >
> > > OZDAT Online
> > > http://www.ozdat.com/ozdatonline/index.htm
> > >
> > >
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