Go for it! FWIW I run an MSD on the Dakota - but that was because
the Dodge OEM ignitor wasn't compatible with the Haltech DFI.
I never ran an ignition on my camaro untill I added nitrous (for timing retard)
and I saw no difference on the dyno before or after (Crane Hi-6 TR).
Chris Bennight
http://www.slowcar.net
----- Original Message -----
From: "Ronald Wong" <ron-wong@home.com>
To: <dakota-truck@buffnet.net>
Sent: Saturday, June 30, 2001 10:48 AM
Subject: RE: DML: Re: MSD
| This would be great to present to MSD to see what kind of rebuttal we would
| get. Would you mind, Chris?
|
| Ron
| 00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
| For modifications see my DML Profile (URL follows)
| http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
|
|
| -----Original Message-----
| From: owner-dakota-truck@buffnet.net
| [mailto:owner-dakota-truck@buffnet.net]On Behalf Of chris@slowcar.net
| Sent: Saturday, June 30, 2001 1:03 AM
| To: dakota-truck@buffnet.net
| Subject: Re: DML: Re: MSD
|
|
| This is one of the things I never agreed with - 48k vs. 28k going farther,
| etc.
| Here's why:
|
| There are 2 steps to "spark"
|
| - First enough voltage must be developed across the spark plug gap to form a
| plasma.
| The voltage required to induce a plasma is not set by the spark module but
| instead by
| the external conditions of the spark gap. Specifically they are the
| air/fuel ratio, amount
| of H20 vapor and the cylinder pressure. The more humidity the lower the
| plasma inducing
| voltage. The higher the compression ratio (and thereby the pressure) the
| higher the voltage.
| I am unsure of the effect of varying air/fuel mixture, I assume it tracks
| humidity
| (dry gas = higher voltage)
|
| - Second, after the plasma is formed, any excess voltage serves to breakdown
| the plasma and
| arcing occurs (the spark).
|
| 2.) The highest plasma inducing voltage required for motors operating with
| 14:1 compression
| is less than 30kV. And no module can force the gap voltage to a higher
| level. Once the plasma
| breakdown voltage is exceeded the spark gap voltage drops by a factor of
| ~50x and the coil is
| discharged with arcing across the gap.
|
| 3.) After the plasma breakdown, arcing (or spark) occurs. But the voltage at
| which sustained
| arcing occurs is about 1/50 the plasma inducing voltage.
|
| Okay, so what does this mean?
| Aftermarket ignition suppliers refer to the spark module's output voltage.
| This is really meaningless.
| The independent variable is not output voltage. Rather the independent
| variable is the voltage
| required to arc the plasma. Even if they say they can deliver 45kV, in a
| 11:0 compression motor,
| 25kV is all the module will ever deliver.
|
|
| Chris Bennight
| http://www.slowcar.net
| 66 Charger For Sale
| http://www.slowcar.net/charger
|
|
|
| ----- Original Message -----
| From: "Ronald Wong" <ron-wong@home.com>
| To: <dakota-truck@BUFFNET.NET>
| Sent: Saturday, June 30, 2001 2:18 AM
| Subject: RE: DML: Re: MSD
|
|
| | The difference between a standard MSD box and your standard ignition is a
| | boost in primary voltage. Instead of 12-volts primary power being
| | introduced to the coil, the MSD box boosts the voltage to 270-volts. On
| an
| | MSD Blaster SS coil I believe the 270 gets boosted to 48K-volts secondary.
| | Std ignition and MSD Blaster coil nets about 28K-volts at the plugs. What
| | does all this buy you? Better ignition and more complete combustion.
| | That's why your gap can be opened up with an MSD box. 48K-volts can jump
| | farther than 28K-volts.
| |
| | Ron
| | 00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
| | For modifications see my DML Profile (URL follows)
| | http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
| |
| |
| | -----Original Message-----
| | From: owner-dakota-truck@BUFFNET.NET
| | [mailto:owner-dakota-truck@BUFFNET.NET]On Behalf Of Sam South
| | Sent: Friday, June 29, 2001 8:21 PM
| | To: dakota-truck@BUFFNET.NET
| | Subject: Re: DML: Re: MSD
| |
| |
| | > Big difference (that may contribute to this) - '95 was OBD-I, '96+ is
| | OBD-II
| |
| | That's what I'm inclined to believe also, the 98 had the MSD on from
| around
| | 10K until I sold it at 45K and bought the 95, it was on both trucks with
| | fresh Mopar cap/rotors and Mopar/MSD wires, and also on the 95 I've used
| | Accel and Mopar cap and rotor. With all these changes the only real
| | difference I felt was with the MSD box itself. Maybe someone out there
| could
| | verify if there is some contributing factors in the OBD-I vs. the OBD-II
| | systems.
| | Sam South
| | 95 Dak, 5.2L,3.90 LSD,5-speed(Soon to be 360 powered)
| | 14.10@98.05
| | http://www.twistedbits.net/WWWProfile/dakota/Mt5J8FaDfVCv6/
| | http://people.mw.mediaone.net/sawcut64/home.html
| |
| | ----- Original Message -----
| | From: "Andy Levy" <andylevy@yahoo.com>
| | To: <dakota-truck-moderator@bent.twistedbits.net>
| | Sent: Friday, June 29, 2001 10:36 PM
| | Subject: Re: DML: Re: MSD
| |
| |
| | > Sam South wrote on Friday 29 June 2001 09:43 pm:
| | >
| | > > I had one on my 98 3.9 and it "felt" stronger, but when it was
| installed
| | > > on my 95 5.2 it definitely felt like I lost a few ponies. I left it on
| | > > anyway thinking maybe I was wrong about it, but after I saw with my
| own
| | > > eyes the difference it made on Mark Dak(I went with him that day to
| the
| | > > dyno) it's coming off and not going back on. Again I have nothing
| | concrete
| | > > to back this up with on my trucks other then how it "felt".
| | > > Sam South
| | > > 95 Dak, 5.2L,3.90 LSD,5-speed(Soon to be 360 powered)
| | > > 14.10@98.05
| | > > http://www.twistedbits.net/WWWProfile/dakota/Mt5J8FaDfVCv6/
| | > > http://people.mw.mediaone.net/sawcut64/home.html
| | > >
| | > > ----- Original Message -----
| | > > From: <Datstein@aol.com>
| | > > To: <Dakota-truck@buffnet.net>
| | > > Sent: Friday, June 29, 2001 8:29 PM
| | > > Subject: DML: MSD
| | > >
| | > >
| | > >> What gives? I'm saving my sheckles to buy an MSD 6A because of all
| the
| | > > good
| | > >> talk on the DML and now it's robbing horsepower??? There must be
| some
| | > >> correlation between the other mods on the vehicle in question or
| maybe
| | > > it's
| | > >> just the emotional justification that the buyer doesn't want to admit
| | > >> that
| | > >> he/she wasted $150. I for one would like to hear several
| | > >> opinions...especially with dyno results. David
| | > >
| | > >
| | >
| | > --
| | > -andy
| | > andylevy@yahoo.com
| | > http://home.twcny.rr.com/andylevy/dakota/
| | > '99 CC 4x4 318 auto
| |
| |
| |
|
|
|
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