Thanks Tom, I stand corrected, could be just the inlines that have the IHIs,
the only rotary I've ever owned was an auto 12a capella. I totally agree
about torque, If you noticed my email address, you might gather what my
daily driver is :) gotta love factory 225kw and 460Nm of torque.
In regards to oil return, unfortunately the oil takes the path of least
resistance, if you look at any standard Nissan turbo vehicle, you'll notice
the returns are more than twice the diameter of the feed and are quite
susceptible to drainage problems.
my thoughts on twin setups are this, If you're going to the trouble of
fabricating manifolds, it's far easier to plumb for one, not two, 2 second
hand turbos do not flow the same (similar, but not quite), so what do you
do?, set one to run 1-3-5, the other 2-4-6 (better than 1-2-3 and 4-5-6
IMHO) the manifolding is fairly easy to fabricate if you have access to a
mig and laser cutting facilities, but what happens if one turbos stock w/g
value is 8psi, the other is 7psi (I have noticed this on many s/h turbos,
and can be minimised to some degree in the way you plumb the w/g diaphragm
lines), take the chance of leaning out 3 pots in the attempt to extract the
most hp, or go the safe method and run the mixture on the fat side, and lose
both economy and power. It's certainly up to the individual, I know of
quite a few GTR ( a countless numbers in Japan) owners that ditch the twin
setup and go for a large single (admitly, an RB26 is just starting to get
into their working RPM, when a 4.1 is running out of steam).
no matter what system is chosen, there will be compromises, but if either
are done by a competent owner, then there are big $$$ to be saved, along
with the great "warm and fuzzy" feeling that, "YES... I've done this
myself."
regards Eddie
----- Original Message -----
From: "Tom Richardson" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, March 29, 2001 12:36 AM
Subject: RE: wanted nissan or other turbos cheap for custom set up.
> Eddie
>
> It's a Hitachi of some sort and since a rotary is supposed to have
> equivalent capacity of twice the actual capacity that would make it
suitable
> for a 2600cc piston engine? I think?
>
> I think a pair of VG20 turbos is a great idea because they will give heaps
> better low end response than a second-hand T04 (ie unless your lucky and
> find the trims you want) and since the 250cu six isn't going to be a big
rev
> monster on a small budget I don't think designing a turbo system to suit
one
> is the best idea. The twin turbo ute in Zoom produced 200kw atw at 6psi
of
> boost at only 3800rpm. Lets face it, a torque monster (and there's
nothing
> wrong with that in my opinion!)
>
> I'm not sure I agree with the idea of twin turbos being a bad idea because
> of the friction losses one extra compressor shaft makes (I think it would
be
> negligible) I do agree it's a hassle to plumb extra water and oil lines
(by
> the way I would have thought with positive oil pressure it would actually
> force the oil out through the return lines), and the exhaust will also be
> more complex (unless you currently have a V8 in it!) The manifolds
probably
> wouldn't be that expensive, maybe 600-700? Depends on how much you can
get
> this T04 based kit for I suppose!
>
> Just my 2c :)
>
> - Tom
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of VX225
> Sent: Wednesday, 28 March 2001 11:09 PM
> To: [EMAIL PROTECTED]
> Subject: Re: wanted nissan or other turbos cheap for custom set up.
>
>
> Andrew, they use IHIs from memory don't they? same as Volvo I suspect,
also
> forgot to mention a possible cheap source for a T4 could be off a wrecked
> late model Saab, the Viggen 9-3 for example uses a monster setup, the
first
> car I ever drove that changed lanes on the freeway just by dropping the
> right foot to the floor (gotta love FWD torque steer @100kph), not too
sure
> what the earlier ones ran, but possibly a good size to consider as well.
>
> regards Eddie
> ----- Original Message -----
> From: "andrew smith" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, March 29, 2001 12:35 AM
> Subject: Re: wanted nissan or other turbos cheap for custom set up.
>
>
> > Wayne,
> > Another turbo that could be suitable and cheap is the series4/5 turbo
from
> a 13b
> > Mazda.These have a large turbine housing that should suit the 4.1 and
have
> > internal waste gate.They can be easily modified using Garrett comp
wheels
> to
> > flow up to 400hp.My 2 cents worth.
> > Andrew Smith
> >
> > VX225 wrote:
> >
> > > Wayne, VG20s use single turbo, poverty spec T3s, $250 is more than
they
> are
> > > worth, beat 'em down to $200, I personally wouldn't use them to keep
my
> > > garage door open on windy days, RB20 Turbo would be better as they
have
> a
> > > more efficient turbine trim (only just), and the RB25s T3 is better
yet
> > > again, an R33 GTS-T RB25 turbo is a T3 BB.
> > >
> > > Are you planning on plumbing the exhaust yourself? otherwise the cost
of
> > > having the pipes made on a 4.1 to suit 2 hairdryers would more than
> offset
> > > the purchase price of a good T4, remember also that shaft drag and
load
> > > required to spool on multiple turbo setups (with the exception of
> > > sequential) is much greater, so the negatives, far outweigh the
> positives.
> > >
> > > Also take into considerations the oil feed for 2 small turbos is
greater
> > > than 1 larger turbo, sump returns have to be constructed, using just
one
> > > with a y piece is not recommended, as the returns are gravity, they
soon
> > > fill up the lines and start bypassing the seals and dump oil into
either
> the
> > > compressor side (ping city when the intake devours hot oil) or
straight
> into
> > > the exhaust (EPA pulls you over within 10 mins of leaving home)
> > >
> > > I have setup and used both a twin (T28s ex R33 GTR) and single setup
> > > (GT3035) on my old 253 work ute and found the single worked better,
> produced
> > > less problems, used less fuel, and the icing on the cake was pulled
more
> hp
> > > on the pump!
> > >
> > > Just my humble opinion, regards Eddie
> > >
> > > ----- Original Message -----
> > > From: "Davidson" <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Wednesday, March 28, 2001 7:28 PM
> > > Subject: Re: wanted nissan or other turbos cheap for custom set up.
> > >
> > > > Theres a story in ZOOM about a twin turbo 4.0L Ford ute. Its been
> there
> > > > project for the last couple of months. They used 2 VG20det turbos
> with
> > > > custom made manifolds. A stock VG20 turbo runs at 7psi and the HP
> reading
> > > > for the Ford 6 is about 430hp @ 4500rpm with 7psi if i remember
> correct.
> > > > Alltho the engine was allready Tickford tuned if that really makes
> much
> > > > difference at all over the normal 6. If u want more info i could
> probably
> > > > dig up the ZOOM mags that had the articles...
> > > >
> > > > Scott
> > > > Davo
> > > >
> > > > -----Original Message-----
> > > > From: Wayne Jones <[EMAIL PROTECTED]>
> > > > To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> > > > Date: Wednesday, 28 March, 2001 16:56
> > > > Subject: wanted nissan or other turbos cheap for custom set up.
> > > >
> > > >
> > > > >Hi,
> > > > >im looking into turboing my straight six 4.1 ford engine (sorry it
> aint
> > > > >nissan but the turbo will be) anyway. most setups on theses engine
> off
> > > the
> > > > >shelf cost heeps and use a single TO4 turbo. i cant find a single
> turbo
> > > big
> > > > >enough at the write price for my engine so i would like to use two
> smaler
> > > > >turbos of say a 2lt that would add up to 4lt. The cheapest turbos i
> can
> > > > find
> > > > >are from a vg20, jms is asking 250 each. Does enyone know where to
> get
> > > > >turbos cheaper, does anyone have any information on the vg20 turbo,
> like
> > > > >what psi does it pump in standard, also how many turbos are there
on
> a
> > > vg20
> > > > >two or one???? And any other infomation you have would be greatly
> > > > >appreciated.
> > > > >
> > > > >regs
> > > > >Wayne jones
> > > >
> >_________________________________________________________________________
> > > > >Get Your Private, Free E-mail from MSN Hotmail at
> http://www.hotmail.com.
> > > > >
> > > >
> > >
> >
>
>
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