Daniel
The RB turbo does come off a smaller motor, and it is a roller bearing
turbo, so yes it would be better suited to smaller motor, but it's still a
really expensive solution! Which is why I suggest that the T3 is a better
'bang for buck'. A better solution than a VG30ET turbo would be a
ex-FJ20DET T3, in fact I think this will be what I fit to my car because
1) It's off a 2L to start with
2) It has a quite big A/R ratio (partly due to it's age) for future headroom
3) It's still much, much cheaper than the RB
Thoughts?
- Tom
----- Original Message -----
From: "Daniel Kroehn" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, February 21, 2001 1:57 PM
Subject: Re: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> I will be buying a heavy duty or 4 puck clutch for it and I already have a
> R160 LSD under the back of my 1600, so the driveline should hold together
> pretty well! In regard to our debate about turbo selection, I still think
> the RB model will be better suited as it comes off a smaller engine to
begin
> with thus been a bit better suited to our application. Just to throw a
> spanner in the works though, Jim Jones was a firm believer in the T3's
> ability to produce good power across the entire rev range of the Z18et and
> we all know what kind of zed motor that Jim's
> got............................
> 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: Wednesday, February 21, 2001 12:21 AM
> Subject: RE: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
>
>
> > Yea pity about that 2 vpc design, low rpm off boost torque is better
> though!
> > It makes the turbo lag less painful but still, I'd want to have some
boost
> > by 2500 (as much as I like cammed up L's I don't like turbo lag a whole
> lot)
> > so I may have reconsider the plain bearing T3 and look for a ballbearing
> > version or settle for a smaller turbo. The VG30ET turbos are cheap, so
I
> > think it may be a case of put the text books away and have a shot at it
;)
> >
> > Is the turbo that you got with the motor in good nick? I would even say
> run
> > that for a while, some Z18 guys run up to 16psi with the stock turbo
(with
> > aftermarket management, intercooling and avgas) which should produce
> around
> > 115-120kw at the wheels - enough for high 13's/low 14's -which would
give
> > the 300kw GTS a run for its money at 13.7 .............. hmmm maybe you
> > should spend your RB25DET turbo money strengthening the driveline if you
> > havent already :)
> >
> > Paddy pointed out to me that the Fury cam is obviously a full race spec
> cam
> > so driveability compromises may not be worth it, since the only
advantage
> of
> > having an 8 valve turbo over 16v is that low rpm off boost torque so it
> > wouldn't do to lose it, depends how much you want up top i spose
> >
> > We'll see!
> >
> > - Tom
> >
> > PS Errol, how are you going with your Z20ET?
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel Kroehn
> > Sent: Tuesday, 20 February 2001 11:45 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> >
> >
> > I agree with your reasoning behind the different cylinder heads flowing
> > differently for sure! I was just going on both motors sharing the same
> > capacity. Let us know how you get on with cams! I was wanting one to
> bump
> > peak power output up to about the 7000 mark or just above, but I still
> have
> > to do some reasearch in to what this is going to do to my fuel economy!
> My
> > aim is to have something that sucks about as much juice as a V6
commywhore
> > yet more than enough power to blow one (the 220kw version) off at the
> lights
> > quiet convincingly.
> >
> > Daniel Kroehn
> > Recommending Datrats, supplying quality Datsun performance parts
> > www.Datrats.com.au
> >
> > ----- Original Message -----
> > From: Tom Richardson <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Tuesday, February 20, 2001 7:41 PM
> > Subject: RE: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> >
> >
> > > Daniel,
> > >
> > > I'm not sure than I agree that the same theory can be applied to the
> Z18,
> > > because remember the CA is a 16 valve head and will flow much better
at
> > high
> > > rpm, so I doubt we would get the same results with the 8 valve NAPS/Z
> > heads
> > > unfortunately
> > >
> > > Again the white circuit racer (it must be my favourite Z18 car or
> > something
> > > :)- it produces peak power at 7000rpm with linished crank, stock rods,
> > stock
> > > rockers, 125lb springs..... (same bottom end as a L18) Whether or not
> you
> > > want peak power at 7000rpm is another story hehe
> > >
> > > I still reckon the roller bearing RB turbo would probably not be the
> best
> > > bang for buck though. as it will cost a lot lot more than a older VG
T3.
> > > The r/b turbo is obviously better for the long run though so if you
got
> > the
> > > cash then spend it for sure!!
> > >
> > > We need somebody who has a stock cam and a Fury copy and before/after
> dyno
> > > sheets hey :) Wade do a Fury copy so I might have to ring and ask
their
> > > opinion unless any other listers have some more info?
> > >
> > > Anyway enough ranting from me :)
> > >
> > > - Tom
> > >
> > >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel
Kroehn
> > > Sent: Tuesday, 20 February 2001 6:50 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> > >
> > >
> > > The one off the RB25det is ball bearing from memory and according to
the
> > > zoom tests it spools up and is producing about 1 bar of pressure at
> about
> > > 5000rpm on the CA18det. The T3 however is non ball bearing and they
> > reckon
> > > that on the CA, the T3 starts to produce good power from 4000 rpm all
> the
> > > way up to 8000rpm. If I'm not mistaken a standard z18et is only good
up
> > > until a bit over 6000. May have to invest in a turbo cam as well to
> make
> > > use of this? Anyway that was my reasoning behind the one off the RB
> > rather
> > > than the T3 from the VG30det.
> > >
> > > Daniel Kroehn
> > > Recommending Datrats, supplying quality Datsun performance parts
> > > www.Datrats.com.au
> > >
> > > ----- Original Message -----
> > > From: Tom Richardson <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Tuesday, February 20, 2001 2:17 PM
> > > Subject: Re: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> > >
> > >
> > > > Daniel,
> > > >
> > > > The CA has a T2 style flange so you will definately need a custom
> > manifold
> > > > to use one of these. In my humble opinion, one of the best turbos
to
> > use
> > > on
> > > > a ~2L four would have to be the cheap and cheerful ex-CA18/SR20 T25
or
> > > T28,
> > > > they ought to be quite plentiful (I should think more so than RB
> turbos)
> > > > because of the number of S13 & S14 (& S15!?) owners chasing more
power
> > via
> > > > larger turbos. The ball bearing T28 (late S14) apparently flows
> enough
> > > for
> > > > approx 170kw-180kw at the wheels- is this enough for you? If not (!)
> > then
> > > I
> > > > agree- go for the big gun RB25DET unit! Is this a ball bearing RB25
> > > turbo?
> > > > Sounds like low end response might be a little weak with a normal
> turbo
> > > this
> > > > big on a 1.8L? Also, I thought the (R33) RB25 turbo was a T03?
> > > >
> > > > I picked up a stock Z18ET manifold for $50, so I will be running a
T3
> > > sized
> > > > turbo on my Z20ET. One possibility is the T3 from a VG30ET, it
should
> > be
> > > > plenty big enough for a 2L! Easy to find and cheap too, hopefully.
I
> > > doubt
> > > > the stock manifold will pose that much of a restriction, because
with
> > the
> > > > relatively high N/A compression ratio I will only be able to run
> around
> > > 6-7
> > > > psi of boost..... bring on the 29mm forgies :)
> > > >
> > > > - Tom
> > > >
> > > > PS Are you planning to keep the standard camshaft or use something
> like
> > a
> > > > Fury copy? Any thoughts on the gains available from such a change
> > Daniel
> > > (&
> > > > list)?
> > > >
> > > > ----- Original Message -----
> > > > From: "Daniel Kroehn" <[EMAIL PROTECTED]>
> > > > To: <[EMAIL PROTECTED]>
> > > > Sent: Tuesday, February 20, 2001 1:09 PM
> > > > Subject: Re: Z18 turbo (was RE: Turbo'd L series (my s4 rx7 turbo))
> > > >
> > > >
> > > > > I don't know about modifying the cylinder head and intake jsut
yet,
> > but
> > > I
> > > > > plan to in the future. As for turbo's I want to use the turbo
> > attached
> > > to
> > > > > the Nissan RB25. It's produces the same power as a T3 but comes
on
> a
> > > bit
> > > > > earlier in the rev range, so that might be the go. Check out the
> > latest
> > > > > zoom, it has a good tech article on the CA18det and appropriate
> turbo
> > > > > upgrades!
> > > > >
> > > > > Daniel Kroehn
> > > > > Recommending Datrats, supplying quality Datsun performance parts
> > > > > www.Datrats.com.au
> > > >
> > >
> > >
> >
> >
>
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/[email protected]/
---------------------------------------------------------------------
