Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: "Brad Franks" <(email redacted)>


Last Friday I was introduced to the lady in brown who held in her hands a
small package. Within it's Wilwood Dynalite marked confines was alas, not a
set of Wilwood Dynalites but a heated O2 sensor and a set of NGK ZRF7
extended reach plugs. Saturday brought about a good time to gap the plugs at
.030 and put them in the car along with the heated O2 sensor and set the
timing to 6 degrees BTDC.

Sunday brought about a nice little jaunt up I-5 to visit my friend and
former Portlander Nate. We made a few good pulls with the nitrous and yanked
the plugs to see the damage. I was expecting to see more melted electrodes
and aluminum slathered all over everything. Wasn't I pleasantly suprised to
see that they were evenly coated with a powdery whitish-yellowish substance
on the ground electodes, near spotless insulators, perfectly shaped +
electrodes and a tidy black sooty ring around the thread base. All in all,
very nice looking plugs.


My warm start and seems to have suffered slightly for all of this though,
what with the 4 degrees of base ignition retard and spark plugs 2 heat
ranges colder than prescribed by Mazda. But any hesitation in the idle goes
away after a 5 minute drive to warm things back up again. This doesn't
concern me too much but what does concern me is the misfiring and smell of
fuel after a run with the nitrous. It will misfire at about 5500 rpm all the
way to redline and the cockpit begins to smell of fuel. It's not an
overwhelming smell at all, but it's definitely there.

Here's what I'm trying to figure out. Is this fuel smell due to the
misfiring? Or is the misfiring due to the fuel smell? If I pop the hood
after a run I can get a strong smell of the fuel, but it's an indirect smell
if you know what I mean. Not like I'm sticking my nose in a puddle of fuel,
but more like someone about 10 ft away has just poured a pint of it on the
ground. There are no visible puddles or wet spots on or around the fuel
lines, nor can I feel any around the nozzles (can't see them directly).

The Autometer A/F meter shows two to three bars "rich" which is about 1 bar
more than when under WOT normally aspirated. Seems to be right where I would
want it, but could the increased fuel be blowing the spark out somehow? Or
is the Nitrous blowing out the spark because the extended reach plug is
right in the line of fire from the nozzle instead of being tucked away above
the intake valves?

Other than the misfiring and the fuel smell the car runs strong as hell!

Thanks in advance!

Brad

This read-only message was archived from a public mail list.
Mail From: (email redacted)

In a message dated 2/27/01 9:48:30 PM Central Standard Time,
(email redacted) writes:


> The Autometer A/F meter shows two to three bars "rich" which is about 1 bar
> more than when under WOT normally aspirated. Seems to be right where I would
> want it, but could the increased fuel be blowing the spark out somehow? Or
> is the Nitrous blowing out the spark because the extended reach plug is
> right in the line of fire from the nozzle instead of being tucked away above
> the intake valves?
>
>

My nitrous system acted very similarly. My first problem was the Accel 300+
Thundersports wires that I highly recommend against. After removing the wires
and reinstalling my trusty NGK wires, I had only a slight, but very noticable
misfiring problem. I turned to MSD who recommended the DIS2 (designed for
dual coil ignition systems). After the MSD DIS2 (required a tach adapter for
my 1.6) was installed, I could no longer detect any misfiring. The car ran
noticably stronger both in boost only and boost with nitrous. I believe that
the improved spark is what pushed the engine past the threshhold and led to
the rod that snapped just days later. This was with 15psi and a 75shot of
nitrous on a stock 1.6L.

Emmett Burke
STILL waiting for Crower to come through
with rods!

This read-only message was archived from a public mail list.
Mail From: "Jesus Lara" <(email redacted)>


In my dry system the fuel pressure needs to bleed of for a second or so
resulting in a overly rich mixture like you describe(and occasional
backfire), but since you have a wet system all I can think of is the
residual fuel in the lines to drip out of the nozzle till there dry. I don't
really worry about it I don't think it'll anything except the cat.

just my .02
Jesus Lara
Texas A&M Class of 2003

----- Original Message -----
From: "Brad Franks" <(email redacted)>
To: <(email redacted)>
Sent: Tuesday, February 27, 2001 9:42 PM
Subject: NOS Misfiring, what to do?


>
> Last Friday I was introduced to the lady in brown who held in her hands a
> small package. Within it's Wilwood Dynalite marked confines was alas, not
a
> set of Wilwood Dynalites but a heated O2 sensor and a set of NGK ZRF7
> extended reach plugs. Saturday brought about a good time to gap the plugs
at
> .030 and put them in the car along with the heated O2 sensor and set the
> timing to 6 degrees BTDC.
>
> Sunday brought about a nice little jaunt up I-5 to visit my friend and
> former Portlander Nate. We made a few good pulls with the nitrous and
yanked
> the plugs to see the damage. I was expecting to see more melted electrodes
> and aluminum slathered all over everything. Wasn't I pleasantly suprised
to
> see that they were evenly coated with a powdery whitish-yellowish
substance
> on the ground electodes, near spotless insulators, perfectly shaped +
> electrodes and a tidy black sooty ring around the thread base. All in all,
> very nice looking plugs.
>
>
> My warm start and seems to have suffered slightly for all of this though,
> what with the 4 degrees of base ignition retard and spark plugs 2 heat
> ranges colder than prescribed by Mazda. But any hesitation in the idle
goes
> away after a 5 minute drive to warm things back up again. This doesn't
> concern me too much but what does concern me is the misfiring and smell of
> fuel after a run with the nitrous. It will misfire at about 5500 rpm all
the
> way to redline and the cockpit begins to smell of fuel. It's not an
> overwhelming smell at all, but it's definitely there.
>
> Here's what I'm trying to figure out. Is this fuel smell due to the
> misfiring? Or is the misfiring due to the fuel smell? If I pop the hood
> after a run I can get a strong smell of the fuel, but it's an indirect
smell
> if you know what I mean. Not like I'm sticking my nose in a puddle of
fuel,
> but more like someone about 10 ft away has just poured a pint of it on the
> ground. There are no visible puddles or wet spots on or around the fuel
> lines, nor can I feel any around the nozzles (can't see them directly).
>
> The Autometer A/F meter shows two to three bars "rich" which is about 1
bar
> more than when under WOT normally aspirated. Seems to be right where I
would
> want it, but could the increased fuel be blowing the spark out somehow? Or
> is the Nitrous blowing out the spark because the extended reach plug is
> right in the line of fire from the nozzle instead of being tucked away
above
> the intake valves?
>
> Other than the misfiring and the fuel smell the car runs strong as hell!
>
> Thanks in advance!
>
> Brad
>



_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at mail.yahoo.com

This read-only message was archived from a public mail list.
Mail From: Mark Peugeot <(email redacted)>



Tighten the gap to .028 and see if that helps. If not then you are likely
running a tad too rich.

Mark

On Tue, 27 Feb 2001, Brad Franks wrote:

>
> Last Friday I was introduced to the lady in brown who held in her hands a
> small package. Within it's Wilwood Dynalite marked confines was alas, not a
> set of Wilwood Dynalites but a heated O2 sensor and a set of NGK ZRF7
> extended reach plugs. Saturday brought about a good time to gap the plugs at
> .030 and put them in the car along with the heated O2 sensor and set the
> timing to 6 degrees BTDC.
>
> Sunday brought about a nice little jaunt up I-5 to visit my friend and
> former Portlander Nate. We made a few good pulls with the nitrous and yanked
> the plugs to see the damage. I was expecting to see more melted electrodes
> and aluminum slathered all over everything. Wasn't I pleasantly suprised to
> see that they were evenly coated with a powdery whitish-yellowish substance
> on the ground electodes, near spotless insulators, perfectly shaped +
> electrodes and a tidy black sooty ring around the thread base. All in all,
> very nice looking plugs.
>
>
> My warm start and seems to have suffered slightly for all of this though,
> what with the 4 degrees of base ignition retard and spark plugs 2 heat
> ranges colder than prescribed by Mazda. But any hesitation in the idle goes
> away after a 5 minute drive to warm things back up again. This doesn't
> concern me too much but what does concern me is the misfiring and smell of
> fuel after a run with the nitrous. It will misfire at about 5500 rpm all the
> way to redline and the cockpit begins to smell of fuel. It's not an
> overwhelming smell at all, but it's definitely there.
>
> Here's what I'm trying to figure out. Is this fuel smell due to the
> misfiring? Or is the misfiring due to the fuel smell? If I pop the hood
> after a run I can get a strong smell of the fuel, but it's an indirect smell
> if you know what I mean. Not like I'm sticking my nose in a puddle of fuel,
> but more like someone about 10 ft away has just poured a pint of it on the
> ground. There are no visible puddles or wet spots on or around the fuel
> lines, nor can I feel any around the nozzles (can't see them directly).
>
> The Autometer A/F meter shows two to three bars "rich" which is about 1 bar
> more than when under WOT normally aspirated. Seems to be right where I would
> want it, but could the increased fuel be blowing the spark out somehow? Or
> is the Nitrous blowing out the spark because the extended reach plug is
> right in the line of fire from the nozzle instead of being tucked away above
> the intake valves?
>
> Other than the misfiring and the fuel smell the car runs strong as hell!
>
> Thanks in advance!
>
> Brad
>
>
>

This read-only message was archived from a public mail list.
Mail From: Mark Peugeot <(email redacted)>



Is this a 1.6 or 1.8, if it is a 1.6 you might do well to try the 1.8
coils. Or as someone else suggested a stronger spark will do wonders (my
suggestion of narrowing the gap is a crutch for a weak ignition.)

Mark

On Tue, 27 Feb 2001, Mark Peugeot wrote:

>
>
> Tighten the gap to .028 and see if that helps. If not then you are likely
> running a tad too rich.
>
> Mark
>
> On Tue, 27 Feb 2001, Brad Franks wrote:
>
> >
> > Last Friday I was introduced to the lady in brown who held in her hands a
> > small package. Within it's Wilwood Dynalite marked confines was alas, not a
> > set of Wilwood Dynalites but a heated O2 sensor and a set of NGK ZRF7
> > extended reach plugs. Saturday brought about a good time to gap the plugs at
> > .030 and put them in the car along with the heated O2 sensor and set the
> > timing to 6 degrees BTDC.
> >
> > Sunday brought about a nice little jaunt up I-5 to visit my friend and
> > former Portlander Nate. We made a few good pulls with the nitrous and yanked
> > the plugs to see the damage. I was expecting to see more melted electrodes
> > and aluminum slathered all over everything. Wasn't I pleasantly suprised to
> > see that they were evenly coated with a powdery whitish-yellowish substance
> > on the ground electodes, near spotless insulators, perfectly shaped +
> > electrodes and a tidy black sooty ring around the thread base. All in all,
> > very nice looking plugs.
> >
> >
> > My warm start and seems to have suffered slightly for all of this though,
> > what with the 4 degrees of base ignition retard and spark plugs 2 heat
> > ranges colder than prescribed by Mazda. But any hesitation in the idle goes
> > away after a 5 minute drive to warm things back up again. This doesn't
> > concern me too much but what does concern me is the misfiring and smell of
> > fuel after a run with the nitrous. It will misfire at about 5500 rpm all the
> > way to redline and the cockpit begins to smell of fuel. It's not an
> > overwhelming smell at all, but it's definitely there.
> >
> > Here's what I'm trying to figure out. Is this fuel smell due to the
> > misfiring? Or is the misfiring due to the fuel smell? If I pop the hood
> > after a run I can get a strong smell of the fuel, but it's an indirect smell
> > if you know what I mean. Not like I'm sticking my nose in a puddle of fuel,
> > but more like someone about 10 ft away has just poured a pint of it on the
> > ground. There are no visible puddles or wet spots on or around the fuel
> > lines, nor can I feel any around the nozzles (can't see them directly).
> >
> > The Autometer A/F meter shows two to three bars "rich" which is about 1 bar
> > more than when under WOT normally aspirated. Seems to be right where I would
> > want it, but could the increased fuel be blowing the spark out somehow? Or
> > is the Nitrous blowing out the spark because the extended reach plug is
> > right in the line of fire from the nozzle instead of being tucked away above
> > the intake valves?
> >
> > Other than the misfiring and the fuel smell the car runs strong as hell!
> >
> > Thanks in advance!
> >
> > Brad
> >
> >
> >
>
>

This read-only message was archived from a public mail list.
Mail From: "Brad Franks" <(email redacted)>


Mark,

You and a few other people have suggested the same thing with the 1.8L
coils. But are they *really* that much stronger than the 1.6 coils? Another
consideration is the 5.5mm NGK blue wires I'm using. Would a better quality
wire possibly help?

Thanks!

Brad

----- Original Message -----
From: "Mark Peugeot" <(email redacted)>
To: "Brad Franks" <(email redacted)>
Cc: <(email redacted)>
Sent: Tuesday, February 27, 2001 9:33 PM
Subject: Re: NOS Misfiring, what to do?




Is this a 1.6 or 1.8, if it is a 1.6 you might do well to try the 1.8
coils. Or as someone else suggested a stronger spark will do wonders (my
suggestion of narrowing the gap is a crutch for a weak ignition.)

Mark

On Tue, 27 Feb 2001, Mark Peugeot wrote:

>
>
> Tighten the gap to .028 and see if that helps. If not then you are likely
> running a tad too rich.
>
> Mark
>
> On Tue, 27 Feb 2001, Brad Franks wrote:
>
> >
> > Last Friday I was introduced to the lady in brown who held in her hands
a
> > small package. Within it's Wilwood Dynalite marked confines was alas,
not a
> > set of Wilwood Dynalites but a heated O2 sensor and a set of NGK ZRF7
> > extended reach plugs. Saturday brought about a good time to gap the
plugs at
> > .030 and put them in the car along with the heated O2 sensor and set the
> > timing to 6 degrees BTDC.
> >
> > Sunday brought about a nice little jaunt up I-5 to visit my friend and
> > former Portlander Nate. We made a few good pulls with the nitrous and
yanked
> > the plugs to see the damage. I was expecting to see more melted
electrodes
> > and aluminum slathered all over everything. Wasn't I pleasantly suprised
to
> > see that they were evenly coated with a powdery whitish-yellowish
substance
> > on the ground electodes, near spotless insulators, perfectly shaped +
> > electrodes and a tidy black sooty ring around the thread base. All in
all,
> > very nice looking plugs.
> >
> >
> > My warm start and seems to have suffered slightly for all of this
though,
> > what with the 4 degrees of base ignition retard and spark plugs 2 heat
> > ranges colder than prescribed by Mazda. But any hesitation in the idle
goes
> > away after a 5 minute drive to warm things back up again. This doesn't
> > concern me too much but what does concern me is the misfiring and smell
of
> > fuel after a run with the nitrous. It will misfire at about 5500 rpm all
the
> > way to redline and the cockpit begins to smell of fuel. It's not an
> > overwhelming smell at all, but it's definitely there.
> >
> > Here's what I'm trying to figure out. Is this fuel smell due to the
> > misfiring? Or is the misfiring due to the fuel smell? If I pop the hood
> > after a run I can get a strong smell of the fuel, but it's an indirect
smell
> > if you know what I mean. Not like I'm sticking my nose in a puddle of
fuel,
> > but more like someone about 10 ft away has just poured a pint of it on
the
> > ground. There are no visible puddles or wet spots on or around the fuel
> > lines, nor can I feel any around the nozzles (can't see them directly).
> >
> > The Autometer A/F meter shows two to three bars "rich" which is about 1
bar
> > more than when under WOT normally aspirated. Seems to be right where I
would
> > want it, but could the increased fuel be blowing the spark out somehow?
Or
> > is the Nitrous blowing out the spark because the extended reach plug is
> > right in the line of fire from the nozzle instead of being tucked away
above
> > the intake valves?
> >
> > Other than the misfiring and the fuel smell the car runs strong as hell!
> >
> > Thanks in advance!
> >
> > Brad
> >
> >
> >
>
>

This read-only message was archived from a public mail list.
Mail From: "Frank Mowry" <(email redacted)>


Told you! What did they say, 4-6 weeks? I think it took me 16 weeks.

Frank

> Emmett Burke
> STILL waiting for Crower to come
through with rods!

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>


20 sets of Carrillos should be here next week...

Bill Cardell
(email redacted)
Flyin' Miata
flyinmiata.com
200mphmiata.net
1-800-FLY-MX5S (orders only)
1-970-242-3800 (tech)


-----Original Message-----
From: Frank Mowry [mailto:(email redacted)]
Sent: Wednesday, February 28, 2001 4:44 AM
To: miata power
Subject: Re: NOS Misfiring, what to do?



Told you! What did they say, 4-6 weeks? I think it took me 16 weeks.

Frank

> Emmett Burke
> STILL waiting for Crower to come
through with rods!