From: Peter Scott <motormcraft@...>
Subject: [Jumbuck] Emissions?
To: Jumbuck@...
Received: Wednesday, 5 November, 2008, 7:42 PM

Hi Guys,
I went down the road of asking about 2 cats for my ICV when someone
suggested that it may be a way around my problem. Apparently the
thinking seems to be that the chemical makeup of the exhaust gasses
are altered significantly in the first cat (as they should be) and
are no longer in the necessary concentrations to make the second cat
effective. It would seem that to make a second cat useful, then you
must have one that runs at a different temperature and uses a
different catalyst material to work on whatever is left after the
first time through. Please bear in mind that I am not a combustion
engineer and I haven't done back to back tests myself to prove this,
(maybe I should!) but the engineer I'm using on my project knocked
the idea on the head.
Unfortunately, I have to go along with what will get signed off as
legal, but it is the inconsistency in engineers across Oz that has
meant that I have had to turn away hundreds of thousands of dollars
worth of work because of "interpretations" , and everybody supposedly
has the same rulebook. I have been heavily involved in the kit
car/modified/ street machine industry for nearly 15 years now and the
level of crap has risen every year. All I can suggest is find an
engineer that likes what you're trying to do, and go with him.
Cheers, Pete.

--- In Jumbuck@yahoogroups .com.au, neil jeffries <vk2kyg@....> wrote:
>
> Hi Dave
> Yeah you would definitely need everything working 100% for the
emissions test,I hope it's not to serious.Peter seems to think 2 cats
wont work,but I don't know why??Emissions is a specialist field and
exhaust places don't know or don't want to know.These days no one
gives you advise for free,they always want to do the job for a
cost.so getting accurate information for free is difficult. Let us
know.
> Regards Neil
>  
>
> --- On Wed, 5/11/08, wolfman2878 <davejohnson69@ ...> wrote:
> From: wolfman2878 <davejohnson69@ ...>
> Subject: [Jumbuck] Re: Torque steer
> To: Jumbuck@yahoogroups .com.au
> Received: Wednesday, 5 November, 2008, 9:15 AM
>
>
>
>
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>
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>
>
>
>
> Yeah it's a lucky dip thats for sure. I'm going to do a
leak down test
>
> later today so I'll see whats going on!
>
>
>
> I'm booked in for the 8th of December, my engineer seemed to think
it
>
> would pass ok but that doesn't mean much. It's a bit of a worry if
it
>
> wont pass, we may need to look at a retune to get it running
cleaner.
>
> Two cats! Food for thought! If i have a burnt out exhaust valve I
>
> would have no chance of passing I don't think.
>
>
>
> Cheers
>
> Dave
>
>
>
> I'll check the mail today Neil, talk soon... Cheers
>
>
>
> --- In Jumbuck@yahoogroups .com.au, neil jeffries <vk2kyg@> wrote:
>
> >
>
> > Dame that's a shame Dave,I guess you never know what your getting
>
> with a half cut.It cost me around $600 bucks to do my head,New valve
>
> guides,regrind valves/seats, new springs,stem seals,decked, and I
did
>
> all the matched porting.
>
> > hey Dave when are you booked in for your emission test,I spoke to
my
>
> engineer yesterday
>
> > and he recons it is all but impossible to pass with this engine
in a
>
> 2003 model car.(Hope he is wrong) I have read some posts that say
you
>
> need to run 2 cat converters?? Have you ever heard of that??and
would
>
> it work?? Keep us posted.
>
> > Regards Neil
>
> >
>
> >
>
> > --- On Tue, 4/11/08, wolfman2878 <davejohnson69@ ...> wrote:
>
> > From: wolfman2878 <davejohnson69@ ...>
>
> > Subject: [Jumbuck] Torque steer
>
> > To: Jumbuck@yahoogroups .com.au
>
> > Received: Tuesday, 4 November, 2008, 5:17 PM
>
> >
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> > Hey Neil,
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> >
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> >
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> >
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> > Sorry I missed your call Saturday.
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> >
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> >
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> >
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> > Yeah torque steer is still some what of a problem even after the
>
> >
>
> > wheel align. Our shity roads down this way don't help things
much,
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> >
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> > but I'm getting use to it!
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> >
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> >
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> >
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> > I think I may have an exhaust valve in number one cylinder
burning
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> >
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> > out, I have to check over things yet but it's got that familiar
>
> >
>
> > exhaust sound of a valve! Sorta sounds like a scooby roo...
Bugger!
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> >
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> >
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> >
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> > Cheers
>
> >
>
> > Dave
>
> >
>
> >
>
> >
>
> > --- In Jumbuck@yahoogroups .com.au, neil jeffries <vk2kyg@> wrote:
>
> >
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> > >
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> >
>
> > > Hi Dave
>
> >
>
> > > So is the torque steer that bad?? I read bennys post on torque
>
> >
>
> > steer with his and he said it wasn't bad at all,but thats
probably
>
> >
>
> > the evo lsd helping... Tried ringing you saturday??
>
> >
>
> > > Regards Neil
>
> >
>
> > >
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> >
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> > >
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> >
>
> > > --- On Sat, 1/11/08, wolfman2878 <davejohnson69@ ...> wrote:
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> >
>
> > > From: wolfman2878 <davejohnson69@ ...>
>
> >
>
> > > Subject: [Jumbuck] GSR clutch pedal with spring assist
>
> >
>
> > > To: Jumbuck@yahoogroups .com.au
>
> >
>
> > > Received: Saturday, 1 November, 2008, 11:31 PM
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> > > Hi all,
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> > > I installed the clutch pedal assemble from my GSR half cut the
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> >
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> > other
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> > >
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> > > day. It has a guided spring (see new photos) to help push the
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> > >
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> > > heavier GSR clutch in!
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> > >
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> > > It works by going past centre after the clutch pedal is
depressed
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> >
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> > >
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> > > about 15mm. It feels a little wierd at first but it does work
well.
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> > > I had the wheel aligment done on the jummy this week. They gave
it
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> > a
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> > >
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> > > small
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> > >
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> >
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> > > amount of toe in, it has helped a lot with the torque steer
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> >
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> > >
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> >
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> > > problems. The Guy that road tested it after they aligned it
said
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> >
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> > >
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> >
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> > > it's a death machine the way it torque steers, he should have
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> >
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> > driven
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> > >
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> > > it before they aligned it... lol...
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> >
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> > >
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> > >
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> > >
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> > > I have done around 1500 k's now with the 4G93T and fuel econemy
is
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> >
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> > a
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> >
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> > >
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> >
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> > > little worse than I thought it may be. The best I have got so
far
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> >
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> > is
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> >
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> > >
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> >
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> > > 9.27 litres per 100 k's, the aveage is more like 11.5 litres
per
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> >
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> > 100
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> >
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> > >
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> >
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> > > k's. Probably not bad considering the anount of grunt it has :)
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> > > Cheers
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> >
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> > >
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> >
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> > > Dave
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> > >
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> >
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> > > Search 1000's of available singles in your area at the
new
>
> >
>
> > Yahoo!7 Dating. Get Started http://au.dating. yahoo.com/ ?
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> >
>
> > cid=53151&pid= 1011
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> > Search 1000's of available singles in your area at the new
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> Yahoo!7 Dating. Get Started http://au.dating. yahoo.com/ ?
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> Search 1000's of available singles in your area at the new
Yahoo!7 Dating. Get Started http://au.dating. yahoo.com/ ?
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>