Schrapnel Knob just installed - WOW!!

[Peter Berrevoets]

I kind of figured that this would be too good to be true! =(

I've been reading over Scott M's recent updates on the CIS and am definitely
going to turn the boost down.

I've been very careful to 'test the waters' on this over the last two days
and so far nothing has gone blooey yet. (No spare engine so I'm going to be
conservative and dial it down) That being said, I really like the kick (OK
so who doesn't?) and want to find a way to keep it. I think it's time to get
a chip a chip (MAC-14 ECU) and keep the "Schrapnel Knobben", I just like the
way it gets on boost fast!

Another local lister (Mike Hopton) hinted at the same things and also
mentioned an OXS fuel/air meter and/or exhaust gas temperature gauge to keep
a closer eye on things. I'm wondering if some water injection in the IM
might help with piston temperature and detonation?

Thanks for your insight and speedy response, I haven't blown it up and
thanks to you particularly, I will make sure it doesn't happen!

Going to miss that power on the highway, but I'll get it back safer
somehow...

Peter Berrevoets
1990 200TQ
Toronto, Canada
http://frontpage.home.net/pjberr/


> >-----Original Message-----
> >From: Doyt W. Echelberger [mailto:Doyt at nwonline.net]
> >Sent: Saturday, April 21, 2001 11:40 PM
> >To: Peter Berrevoets
> >Subject: Re:Schrapnel Knob just installed - WOW!!
> >
> >
> >I'd like to adjust some of the comments on my first post on
> >this topic.  If
> >your mechanical pressure gauge is accurate at 19 psi (above
> >atmospheric)
> >then you are running 33.7 psi absolute. Multiplying by the 0.06895
> >conversion factor for "psi to bar" and we get 2.3 bar.......
> >which is in
> >the zone where you are making lots of heat that can melt
> >pistons and turn
> >your turbo cherry red. 2.2 bar is actually the line you
> >don't want to run
> >in very long.
> >
> >I misread your post the first time and believed you when you
> >said you were
> >running 2.0 bar, which is upper borderline hot but still OK
> >for short
> >bursts. Then I realized that you were using a computer dash
> >read-out, which
> >tends to be low. Based on your mechanical gauge readings,
> >you are gonna
> >blow it up eventually.
> >
> >Get that pressure regulator dialed down so that you aren't
> >running 19 psi
> >on your mechanical gauge anymore. Get it down to about 12 or
> >13 and your
> >engine will last longer. At 19, things will get very hot
> >very quickly. You
> >are running lean when you are cranking the 2.3 bar.
> >
> >Hope you have a back-up engine sitting around if you are
> >going to continue
> >holding 19 psi on that mechanical gauge.
> >
> >Doyt Echelberger
> >happy with 1.7 bar on his resistor-modded 87 5ktq
> >(tried 2 bar and it scared me)
> >
> >
> > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >At 12:24 AM 4/21/2001 -0400, you wrote:
> >...........snip.......... The mechanical pressure gauge
> >shows 19 psi and the
> >in dash computer reads 2.0 BAR very quickly.
> >
> >
> >This is the dual knock sensor MC engine and I'm wondering if
> >I'm about to
> >blow it up in short order.
> >
> >I need to know what
> >needs to be done to prevent this new-found power from
> >trashing the engine...
> >it seems to be too good to be true...
> >
> >.............................it is.
> >
> >  lots of power, really easily and way
> >too cheaply!! Without the chip modifying the mixture, what
> >am I facing in
> >near immediate problems? Do I need to worry about a lean mixture?
> >
> >........................yes, worry. Detonation.
> >
> >
> >One more WOW!! and then I await the "Turn it down!! You're
> >gonna blow it
> >up!!" responses  ;-)
> >
> >Cheers,
> >
> >Peter Berrevoets
> >1990 200TQ
> >Toronto, Canada
> >http://frontpage.home.net/pjberr/
> >
> >
> >
> >