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shift points for older engines]
A proper air fuel ratio will burn fast. Not fast enough to ignite it at TDC
and have the full use of the burn. Therefore we need to anticipate when the
burn will be needed. This is why timing is BTDC (before top dead center).
It's a balancing act, Too much advance and the engine will knock and produce
HC (unburned fuel) Not enough advance and the engine will run hot and
produce NOx.
Rick Alexander
----- Original Message -----
From: "Rhett Farnum" <rocco_crossing@hotmail.com>
To: <scourge@cogeco.ca>; <scirocco-l@scirocco.org>
Sent: Monday, February 03, 2003 8:08 PM
Subject: re:shift points for older engines]
> <snip>
> could somebody tell me what effects advancing/retarding the timing on the
> engine and performence of the car, I have an idea but only what I've
guessed
> for myself, nobody's ever explained it really, lol
> <snip>
>
> I second this question. Could somebody please explain it?
>
> Peace Out,
> Rhett
> Rocco_crossing
> '83 Rocco (autocross ready, body work needed, starting this tommorrow)
> '92 Olds Cutlass Ciera (DD)
>
>
>
> >From: "Scourge" <scourge@cogeco.ca>
> >To: "Rocco list" <scirocco-l@scirocco.org>
> >Subject: re:shift points for older engines]
> >Date: Sun, 2 Feb 2003 20:01:14 -0500
> >
> >ok....so, after changeing my fuel/air ratio, air filter, sparkplugs, and
> >turning my idle back down, I'm at 19mpg (plus it's up to 0 degrees C
> >from -15 last week)
> >
> >I changed my timing today, as recomended by my mechanic, to 6 * advance
> >I bumped it before I had a chance to check what it was at, but I think it
> >was around 25* advance
> >
> >could somebody tell me what effects advancing/retarding the timing on the
> >engine and performence of the car, I have an idea but only what I've
> >guessed
> >for myself, nobody's ever explained it really, lol
> >
> >thanx
> > George
> >
> >and thanx for the help everyone!!
> >
> >----- Original Message -----
> >From: "Cathy Boyko" <losinit@usa.net>
> >To: <scirocco-l@scirocco.org>
> >Sent: Sunday, February 02, 2003 7:35 PM
> >Subject: Re: [RE: shift points for older engines]
> >
> >
> >Vince Royer <vince@performancecarstereo.com> wrote:
> >12 mpg? Something's gotta be wrong. I get almost 40 from the exact same
> >motor!
> > My motor's different, but I got way better than that this summer with
> >the
> >mixture way off the map on the rich end...
> >
> > > -----Original Message-----
> > > From: scirocco-l-admin@scirocco.org
> > > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of Scourge
> > > Sent: February 1, 2003 10:28 PM
> > > To: Rocco list
> > > Subject: Fw: shift points for older engines
> > >
> > >
> > > I'm driving an an 82' with somewhere over 250k on a 1.7
> > > it's hits 7k quite regularly.......I'm addicted to hight rpm
> > > after having a
> > > golf that stopped making power at 5k, lol
> > >
> > >
> > > quick question as well...I leaned out my fuel/air a bit so I can
> > > get better
> > > mileage...I've never really tried tuning the engine myself
> > > before, how lean
> > > is too lean and how can I tell? and what are the effects on the
engine?
> > > any tips to tuning it? (for power and mileage)
> > > any other tricks to get good gas mileage??
> > >
> > > thanx
> > > George
> > >
> > > p.s. the reason I decided to tune it on my own........12mpg from
> > > a 1.7.....
> > > I was getting 36mpg in my golf, my wallet hurts, lol
> > >
> > >
> > > ----- Original Message -----
> > > From: "Daun Yeagley" <vwdaun@yahoo.com>
> > > To: <FabricSign@aol.com>; <scirocco-l@scirocco.org>
> > > Sent: Sunday, February 02, 2003 1:07 AM
> > > Subject: Re: shift points for older engines
> > >
> > >
> > > >
> > > > --- FabricSign@aol.com wrote:
> > > > >
> > > > > Anybody who's running an older engine (mine has 120k +
> > > > > miles on it),
> > > > > how hard is it safe to run it? I'm wondering if I coddle
> > > > > mine too much,
> > > > > e.g. I tend to upshift at around 2500 to 3500 rpm, and
> > > > > rarely rev past
> > > > > 4000 in any gear.
> > > >
> > > > Older engine? Ha, yours is barely broken in. Plus, it's a
> > > > JH, which is damn near indestructable.
> > > >
> > > > All of my engines have over 200k. None use appreciable
> > > > amounts of oil or any other fluid, and all see redline on a
> > > > frequent basis. Just make sure your oil temp is at least
> > > > 80 C before winding it up, and you should be fine.
> > > >
> > > > __________________________________________________
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> > >
> > >
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