MSD Digital 6+
09-11-08, 03:08 AM
#51
Ugh so I'm working on tuning my carb and I'm getting spark blowout above 6K RPM now that it's nice and rich. I'm going to try some other coil combinations. I checked the stick FB coils resistance and they are 1.6 ohm's. .9 wired in parallel and in a series they're 3.6 ohms. I'm going to try all the setups out and see if it makes any difference.
09-17-08, 07:01 PM
#54
spark blow out is like hitting a MSD soft touch rev limiter... it's simply not enough voltage at the plug to jump the gap. many things can cause it. a bad ignition part somewhere, too high of compression, too rich. you know it happens cause you can't rev it past a certin point. then you lean it out and it goes away. so i added the resistor back onto the coil and it made no difference. I leaned it back out. i'm running 205 mains and 165 a/c and it runs well, just not enough power for how built the engine is supposed to be.
Last edited by Hyper4mance2k; 09-17-08 at 07:14 PM.
06-15-09, 02:13 PM
#56
Welp I've gathereed a few things over some time now and I have a Crane Cams HI-6 and a HI-6R and a LX92 coil. After an electrical short I rewired the car this weekend and took out the Mallory VI-A(which still works great, but I wanted a rev limiter) I installed the HI-6R on the leading with magnetic pick up and a FC coil. The HI-6 is running on the trailing getting sinal from the white wire off the ignitor with the LX92coil. What a difference!!!! It raised the idle from 950 to 1100-1150. Plus no more lean stumbles on cruise and I have a working rev limiter. Sure is cool shooting all those flames on the rev limiter. Anyway, Crane Cams is out of business now so if you can find your self a box do it now. Best improvement yet.
06-16-09, 12:27 AM
#57
Just some stuff I found that made me go Crane.
http://www.mediafire.com/file/1mwkfm4qyvw/11958.pdf
http://www.mediafire.com/file/m22gymnmzfy/90006000e.pdf
http://www.mediafire.com/file/5zm121ehhz2/90006400a.pdf
http://www.mediafire.com/file/1mwkfm4qyvw/11958.pdf
http://www.mediafire.com/file/m22gymnmzfy/90006000e.pdf
http://www.mediafire.com/file/5zm121ehhz2/90006400a.pdf
06-16-09, 06:42 PM
#58
Just some stuff I found that made me go Crane.
http://www.mediafire.com/file/1mwkfm4qyvw/11958.pdf
http://www.mediafire.com/file/m22gymnmzfy/90006000e.pdf
http://www.mediafire.com/file/5zm121ehhz2/90006400a.pdf
http://www.mediafire.com/file/1mwkfm4qyvw/11958.pdf
http://www.mediafire.com/file/m22gymnmzfy/90006000e.pdf
http://www.mediafire.com/file/5zm121ehhz2/90006400a.pdf
06-17-09, 03:06 AM
#59
My 12a and nikki weren't broke, but they weren't making me 190rwhp now were they...
I like the crane boxes more. They're digital, they draw less than half the amps and send the coil more voltage and can recharge it quicker than the msd. It has a rev-limiter that drops random cylinders instead of the same ones over and over causing detonation like the MSD units do. And everyoine in the Muscle car world says they're way more reliable than then a MSD box. Plus I got one of my boxes for $40 with a coil, the other for $100. No reason at all not to upgrade.
I like the crane boxes more. They're digital, they draw less than half the amps and send the coil more voltage and can recharge it quicker than the msd. It has a rev-limiter that drops random cylinders instead of the same ones over and over causing detonation like the MSD units do. And everyoine in the Muscle car world says they're way more reliable than then a MSD box. Plus I got one of my boxes for $40 with a coil, the other for $100. No reason at all not to upgrade.
06-19-09, 11:11 AM
#60
My 12a and nikki weren't broke, but they weren't making me 190rwhp now were they...
I like the crane boxes more. They're digital, they draw less than half the amps and send the coil more voltage and can recharge it quicker than the msd. It has a rev-limiter that drops random cylinders instead of the same ones over and over causing detonation like the MSD units do. And everyoine in the Muscle car world says they're way more reliable than then a MSD box. Plus I got one of my boxes for $40 with a coil, the other for $100. No reason at all not to upgrade.
I like the crane boxes more. They're digital, they draw less than half the amps and send the coil more voltage and can recharge it quicker than the msd. It has a rev-limiter that drops random cylinders instead of the same ones over and over causing detonation like the MSD units do. And everyoine in the Muscle car world says they're way more reliable than then a MSD box. Plus I got one of my boxes for $40 with a coil, the other for $100. No reason at all not to upgrade.
Also, the MSD does drop random cylinders as well, this is right off their website:
"MSD first developed the Soft Touch rev control to prevent overrev damage to your motor in the event of a missed shift or driveline failure. The rpm limit is adjustable in 100 rpm increments with MSD’s plug-in modules. When the engine reaches your selected limit, the Soft Touch circuitry begins dropping the spark to various cylinders. On the next cycle, these plugs are fired again to prevent fuel from loading up in the cylinder. The result is a smooth and accurate limiting action without backfires or roughness."
06-19-09, 01:50 PM
#61
"eaches your selected limit, the Soft Touch circuitry begins dropping the spark to various cylinders."
I was wrong the MSD drops random and can allow fuel to load up and detonate, where the cranne drops them in order 1-2-3-4-1-2-3-4-1-2-3-4. 12345678-12345678- etc...
I rememebered the crane rev limiter was better i just forgot why.
I was wrong the MSD drops random and can allow fuel to load up and detonate, where the cranne drops them in order 1-2-3-4-1-2-3-4-1-2-3-4. 12345678-12345678- etc...
I rememebered the crane rev limiter was better i just forgot why.
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