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Which is better?

  • The Stock Ignition.

    Votes: 5 33.3%
  • MSD 7AL-2, even with its price...

    Votes: 4 26.7%
  • Jacobs Pro-Street Kit, just 15mj shy of the MSD, but is digital!

    Votes: 6 40.0%

  • Total voters
    15
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Discussion Starter #1 (Edited)
This thread will be complete in 8 days from now. The Pro Street Kit will arrive Friday when I'll install just the coil, but in the meantime, figured I would do side by side comparison of the Pro Street and a MSD 7AL:
MSD 7AL-2: $559.40

Ignition Box Output: Capacitive discharge
Circuitry: Analog
Rev Limiter: Yes
Timing Retard: None
Data Acquisition: No
CD Voltage Output to Coil: 570 V
Current Draw: 1 amp per 1,000 rpm
Spark Output (millijoules): 160 Millijoules
Minimum Operating Voltage: 12 V
Maximum Operating Voltage: 18 V
Length (in): 8.250 in.
Height (in): 5.750 in.
Width (in): 3.750 in.
Ignition Box Color: Gold
Coil Included: No

Jacobs Electronics Pro Street: Cost $339

Circuitry: Digital
Rev Limiter: Yes
Ignition Box Output: Capacitive discharge
CD Voltage Output to Coil: 535 V
Minimum Operating Voltage: 7.5 V
Maximum Operating Voltage: 18 V
Current Draw: 11 amps at 10,000 rpm
Spark Output (millijoules): 145 Millijoules
Length (in): 8.500 in.
Height (in): 2.500 in.
Width (in): 4.500 in.
Ignition Box Color: Blue
Coil Included: Yes
Coil Style: E-core
Coil Internal Construction: Epoxy
Maximum Voltage: 60,000 V
Mounting Bracket Included: Yes
Coil Wire Included: Yes
Coil Shape: Square
Coil Color: Blue
Anti-Theft Switch: Yes (I got that as an option)
Micro Throttle Activated Switch: Yes (I got that as an option)
"The Pro Street uses a high speed digital
processor to control multi-sparking and capacitive discharge
output. An adjustable rev limiter set by rotary dials is
included. An optional full throttle switch can be connected
that significantly boosts the Pro Street's output when you
need it most!"

My oppinion is that $ for $ Jacobs Electronics Pro Street is the best ($ to $) ignition system around!
 

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Don't have any reason to think the MSD or the Jacobs to be superior than the other. The Crane is also digital.

In regards to the pricing...I have not researched what the 7AL-2 would provide over the 6AL. Pricewise the 6AL is actually cheaper to setup than the Jacobs. There are modules that you can add onto the MSDs for launch control studder boxes, or in cabin retard/advance control, etc. But they cost extra above the main unit. A MSD 6AL with blaster coil can be had for under $300 if you shop around.

It will be interesting to hear what you think of the Jacobs. I personally always thought that the Crane was a little better than the MSD performance wise...seat of the pants. But after having the Crane fail on me....I went with MSD and it has been durable and without issues. My perceived difference may have only existed in my mind....but if it was real then perhaps the digital vs analog. And to further propagate speculation, I've always wondered if the under hood heat adversely effected the modern digital circuitry of the Crane while not being a problem for the MSD analog circuitry in regards to my Crane failure.

Best Regards,
John M
 

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Discussion Starter #5
Don't have any reason to think the MSD or the Jacobs to be superior than the other. The Crane is also digital.

In regards to the pricing...I have not researched what the 7AL-2 would provide over the 6AL. Pricewise the 6AL is actually cheaper to setup than the Jacobs. There are modules that you can add onto the MSDs for launch control studder boxes, or in cabin retard/advance control, etc. But they cost extra above the main unit. A MSD 6AL with blaster coil can be had for under $300 if you shop around.

It will be interesting to hear what you think of the Jacobs. I personally always thought that the Crane was a little better than the MSD performance wise...seat of the pants. But after having the Crane fail on me....I went with MSD and it has been durable and without issues. My perceived difference may have only existed in my mind....but if it was real then perhaps the digital vs analog.

Best Regards,
John M
Murray had a MSD fail on him, so I was trying to keep all equal. MSD 6AL is cheaper in price than the jacobs, but not up to snuff:
Ignition Box Output: Capacitive discharge
Circuitry: Analog
Rev Limiter: Yes
Timing Retard: None
Data Acquisition: No
CD Voltage Output to Coil: 460-480 V
Current Draw: 1 amp per 1,000 rpm
Spark Output (millijoules): 115 Millijoules
Minimum Operating Voltage: 10 V
Maximum Operating Voltage: 18 V
Length (in): 8.000 in.
Height (in): 2.250 in.
Width (in): 4.000 in.
Ignition Box Color: Red
Coil Included: No
CARB EO Number: D-40-26
Warranty: One year warrant
 

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I have to say that I wasn't to impressed with MSD. I had a MSD Dis-4 in my car and the dang thing fried after 4 months of use. After surfing the MSD Tech Forms I found that I wasn't the only one who had this problem either.

The MSD tech recommended that the box should not be placed in an enclosed area that it needs air flowing over it.

Have you ever watch Nascar? Ever wonder why they have 2 MSD igniton control box's on the dash.................so if one fails they can easly switch over to the other one.

I think that one needs to consider the placement of whatever ignition control box they get. There is quite a few race heads that say the engine bay is too hot for the ignition control box and they should be placed inside the car.

I didn't buy another MSD I went to an Autronic 500R CID instead. I'm running a direct fire ignition (one coil per cylinder) so that limited my choices for a replacement ignition. I feel I have the best ignition system for my set up with the Autronic 500R CID.

I also built a cool tunnel for it to keep it cool.

Here are the spec's for the Autronic 500R CID for comparison.

http://www.autronic.com/page_files/direct_fire_cdi.htm
 

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Discussion Starter #7
I have to say that I wasn't to impressed with MSD. I had a MSD Dis-4 in my car and the dang thing fried after 4 months of use. After surfing the MSD Tech Forms I found that I wasn't the only one who had this problem either.

The MSD tech recommended that the box should not be placed in an enclosed area that it needs air flowing over it.

Have you ever watch Nascar? Ever wonder why they have 2 igniton control box's on the dash.................so when if one fails they can easly switch over to the other one.

I think that one needs to consider the placement of what ever ignition control box they get. There is quite a few race heads that say the engine bay is too hot for the ignition control box and they should be placed inside the car.

I didn't another MSD I went to an Autronic 500R CID. I'm running a direct fire ignition (one coil per cylinder) so that limited my choices for a replacement ignition.
MSD also makes the switch to automatically switch between the bad and good box, wonder why...Thank you for the input Murray, much appreciated in keeping this thread intelligent!
 

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Discussion Starter #9
JohnM is the intelligent one, I'm just blazing fast.:D
I love your sense of humor Murray-blazing fast-how fast??? J/K. John M is definetly an intelligent one as well for bringing up good facts on both.
 

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I love your sense of humor Murray-blazing fast-how fast??? J/K. John M is definetly an intelligent one as well for bringing up good facts on both.
I don't know my speedo reads fast but I don't know how much. I switched from a 4.10 to a 4.56, what that does to the speedo I'm not sure. But FWIW been over a hundred on a down hill entrance ramp.

I always chicken out trying to find the top end of it but I'll tell you one thing the black Spiders are the fastest ones. :D:D:D
 

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Discussion Starter #11
the black Spiders are the fastest ones. :D:D:D
I will never ever, disagree with you on that one!!!!! Changing from 4.11 to 4.56, will decrease your 0-60mph time, but kills your top end speed.
 

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Alright, before David and Murray praise John too much, and it goes to his head :rolleyes:, let's see if we can get back on topic! :p

I can't really comment on the MSD, but I did have a Jacobs unit in my '84 Bosch L-Jetronic Spider for 5 years. I was extremely impressed by the unit. I installed in NJ and drove to the Columbus convention, and then to Middletown. After a week of driving around town, I decided that it was time to re-gap the plugs and try a slightly different setting, as recommended by Jacobs. I had originally gapped the plugs at 0.055, but when I checked them, only one was at that setting. The other three were at 0.050, 0.035 and 0.030, but the car was running better than ever! (I was running one oversize cam back then, although it didn't have the lift of the ones that I use today.) So I find that their claim that they monitor each cylinder, etc. has to be true.

I tried different settings, but anything between 0.050 and 0.055 worked best. The L-Jetronics have a lag between the time that one presses the accelerator and the car actually responds. The Jacobs improved the response dramatically. Furthermore, the gas mileage went up by an additional 2 mpg, minimum. The car ran really well with the Jacobs, certainly much better than stock. What was also nice was that it just took a simple bypass of the Jacobs unit to return the set-up to stock. Then, in case of any emergency, and to avoid the issue of indexing the plugs, and having to re-gap dramatically, if the Jacobs unit was bypassed, I just went with Lodge plugs. Jacobs recommends using the simplest of all the plugs, and not something like the Lodges, but it handled them beautifully. Every time I checked them, they looked great.

The only bad thing about the Jacobs was that it failed a couple of months after the 5-year warranty had expired. :( In the end, I decided not to replace it due to cost (it was ~ $500 back in 2001/2002) and the fact that I would loose points at a concours for having a non-original unit under the hood. Just to clarify, the Jacobs doesn't require that one remove any of the Spider components; it just sits on top of them. I don't know if that has changed now, as I haven't kept up with the current version.

A final note, I didn't vote on the poll, since having no experience with the other products, I don't have a basis for comparison. Nonetheless, I don't see how anyone can go wrong with Jacobs.

Best regards,
 

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i run a mallory 6l in my 1984 spider.. i stuffed the mallory next to the f.i ecu. just had to leathen the wires a bit....should be nice there, the bosch ecu's like it there..
 

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Discussion Starter #14
Alright, before David and Murray praise John too much, and it goes to his head :rolleyes:, let's see if we can get back on topic! :p

I can't really comment on the MSD, but I did have a Jacobs unit in my '84 Bosch L-Jetronic Spider for 5 years. I was extremely impressed by the unit. I installed in NJ and drove to the Columbus convention, and then to Middletown. After a week of driving around town, I decided that it was time to re-gap the plugs and try a slightly different setting, as recommended by Jacobs. I had originally gapped the plugs at 0.055, but when I checked them, only one was at that setting. The other three were at 0.050, 0.035 and 0.030, but the car was running better than ever! (I was running one oversize cam back then, although it didn't have the lift of the ones that I use today.) So I find that their claim that they monitor each cylinder, etc. has to be true.

I tried different settings, but anything between 0.050 and 0.055 worked best. The L-Jetronics have a lag between the time that one presses the accelerator and the car actually responds. The Jacobs improved the response dramatically. Furthermore, the gas mileage went up by an additional 2 mpg, minimum. The car ran really well with the Jacobs, certainly much better than stock. What was also nice was that it just took a simple bypass of the Jacobs unit to return the set-up to stock. Then, in case of any emergency, and to avoid the issue of indexing the plugs, and having to re-gap dramatically, if the Jacobs unit was bypassed, I just went with Lodge plugs. Jacobs recommends using the simplest of all the plugs, and not something like the Lodges, but it handled them beautifully. Every time I checked them, they looked great.

The only bad thing about the Jacobs was that it failed a couple of months after the 5-year warranty had expired. :( In the end, I decided not to replace it due to cost (it was ~ $500 back in 2001/2002) and the fact that I would loose points at a concours for having a non-original unit under the hood. Just to clarify, the Jacobs doesn't require that one remove any of the Spider components; it just sits on top of them. I don't know if that has changed now, as I haven't kept up with the current version.

A final note, I didn't vote on the poll, since having no experience with the other products, I don't have a basis for comparison. Nonetheless, I don't see how anyone can go wrong with Jacobs.

Best regards,
Enrique I must thank you for a very, very insightful post! Thank you!
 

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Enrique I must thank you for a very, very insightful post! Thank you!
You are welcome :)... Just be careful with the "baby seal hunter" - he thinks that Luke Skywalker is on this Board, and that he is Obi One... :D:D:D

Best regards,
 

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Discussion Starter #16
You are welcome :)... Just be careful with the "baby seal hunter" - he thinks that Luke Skywalker is on this Board, and that he is Obi One... :D:D:D

Best regards,
ROTFLMAO!!!! I'm not worried about the "Baby Seal", nor should anyone else. If nothing else, he presses the issues at hand for more info and that shouldn't be overlooked.
 

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JohnM is the intelligent one, I'm just blazing fast.:D
Good Lord have mercy....I hope John doesn't read this thread.:eek:

Conedriver runs a Jacobs ignition, my 86 has one mounted on the fender....just aint hooked up. It came that way, the P.O. put lots of real nice stuff into this car and he seemed to know what he was doing. I'm just waiting for Conedriver to drive down to my house and open the garage and hook up my ignition system, hopefully he will put the tools away when he's done...he can grab a beer or two if he wants.....when he's done of course.;)


Dang it guys....y'all know RED spiders are the fastest........:rolleyes:

.
 

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Ah.......you guys are so Sweet. :D:D:D

See...they are all programmed to fail. Murray lost that high end MSD 4edis...I lost a crane Hi6....Enrique lost the Jacobs. Nascar has always ran two ignition boxes, two batteries, and too left. Now if they had a Jacobs in there...there would be two as well.

I think the higher end you guys go you had better be worried about heat and placement........either that or you'll be worried about replacement!:D Murray I hope that autronic holds up....for my own selfish reasons!:D

Be careful David of Enrique. He thinks that he is Darth Vader and even told Murray the other day the he was Murray's father...calling Murray Luke. Something about the darkside and to use his anger over being hunted as baby seal meat to strengthen his use of the force. And I don't think its a coincidence that Enrique has his car painted up to represent the Thialand Racing Team. Enrique has been referring to his car lately as the "Thai Fighter". Scary I know!:D:D:D:D:D:D:D:D

Best Regards,
John M
 

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Discussion Starter #19
Be careful David of Enrique. He thinks that he is Darth Vader and even told Murray the other day the he was Murray's father...calling Murray Luke. Something about the darkside and to use his anger over being hunted as baby seal meat to strengthen his use of the force. And I don't think its a coincidence that Enrique has his car painted up to represent the Thialand Racing Team. Enrique has been referring to his car lately as the "Thai Fighter". Scary I know!:D:D:D:D:D:D:D:D

Best Regards,
John M
ROTFLMAO!!! I didn't know I was being recruited to the dark side, but you know, we do have the black spiders....:eek: We must be in a cult!
 

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Discussion Starter #20
Good Lord have mercy....I hope John doesn't read this thread.:eek:

Conedriver runs a Jacobs ignition, my 86 has one mounted on the fender....just aint hooked up. It came that way, the P.O. put lots of real nice stuff into this car and he seemed to know what he was doing. I'm just waiting for Conedriver to drive down to my house and open the garage and hook up my ignition system, hopefully he will put the tools away when he's done...he can grab a beer or two if he wants.....when he's done of course.;)


Dang it guys....y'all know RED spiders are the fastest........:rolleyes:

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Could post a pic of your Jacobs? Why does conedriver have to go to your place, why not drive it out to his or John M's and have them hook it up? John has a very nice garage;)!!
I thought in another thread we realized that the red ones were only faster if the driver was Italian....:eek:
 
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