Msd enhancer vs protec modded cdi

[Laxpro2]

which is better? And do they even give you a noticeable power gain? I can get a used MSD for $185 or a new protec for $150.

 

[pigpen]

Protec is just a adjustable rev limit. Msd has a different timing curve. Msd would be the better choice but beware on used electronics.


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[TaintlessEd]

+1^


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[newbee]

What pigpen said. If you just want more rev look in to getting a off modded coil also. But MSD better

 

[tntsuperjet]

Msd has a very poor timing curve.
Just an FYI.
The stock timing curve has more retarded built in so you can safely advance the timing more then with an msd.
But you need to know
6m6, 61x or 62t box.

 

[newbee]

Then what cdi is the better to have of the stock ones? Or what cdi do you like to run if you have to pick.

 

[air blair]

Rev limiter mod is a slight noticeable gain over stock and an msd enhancer in a huge noticeable gain performance wise. Awesome holeshot. I've been playing with them this year. Back to back.


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[yamanube]

Msd has a very poor timing curve.
Just an FYI.
The stock timing curve has more retarded built in so you can safely advance the timing more then with an msd.
But you need to know
6m6, 61x or 62t box.

Tim, can you elaborate on this? I have always assumed this graph is accurate...

 

[Quinc]

Msd has a very poor timing curve.
Just an FYI.
The stock timing curve has more retarded built in so you can safely advance the timing more then with an msd.
But you need to know
6m6, 61x or 62t box.

I think you have this backward. The msd has more retard at higher rpms so you can advance timing via stator. @OCD Solutions posted the curves a while back comparing them.

Edit: Yamanube beat me to it!

 

[yamanube]

I have to admit, Tim seems to know a thing or two...and I really friggin hope he is right, I want to be done buying enhancers.

 

[tntsuperjet]

I don't know what msd claims.
But I can tell you I have spun over 20 of them on ignition test motor and none of them have had the same curve.
Most inconsistent electronics I have ever seen.
What is claimed it's quite possible.
But reality of what I tested two years shows less advance then stock and almost flat timing curve with less advance then stock.
Really disappointed in there quality and consistency.

 

[tntsuperjet]

Tim, can you elaborate on this? I have always assumed this graph is accurate...

The dotted yellow line is accurate for 6m6 cdi box.
But it is not accurate for 62t box.
62t has 24deg adv at 2480 and drops to 16 deg after 6600

 

[tntsuperjet]

Tim, can you elaborate on this? I have always assumed this graph is accurate...

That heavy advance on msd before 1300 rpm is number one cause of start back fire as the unit doesn't always stay in start retard when cranking

 

[Quinc]

From ocd post. Blue is msd

 

[OCD Solutions]

Pretty sure I made that curve by simply plotting the published MSD curve you pictured earlier into that graph. I can't recall if I ever took the time to hook up an MSD and map out the true curve.

I happen to have an MSD on the bench right now so once I clock out for the day I may be able to spin it up and map it out. The real question is going to be whether or not my system is accurate enough to map it anywhere close to what TNT can do.
My test bench was never built with that type of accuracy or function in mind so it is what it is.

 

[yamanube]

The dotted yellow line is accurate for 6m6 cdi box.
But it is not accurate for 62t box.
62t has 24deg adv at 2480 and drops to 16 deg after 6600

You are proposing the 62t curve looks a bit like this magenta line?

 

[Sasquachcrap]

I have always wandered why performance gain was so hit or miss with enhancers. I had a guy tell me just the other day the same thing TNT said about the enhancers. Non of his tested units had the same curve. I'm curious to see what OCD comes up with.

 

[OCD Solutions]

I've observed fluctuations and inconsistencies with the enhancers before but usually only when running them off battery power. They seem to straighten out when I turn on the trickle charger and provide a solid clean power supply.

 

[newbee]

So out of stock cdi what setup if the better one to use ? I dont think I'm ready for a total loss yet.

 

[Quinc]

I have always wandered why performance gain was so hit or miss with enhancers. I had a guy tell me just the other day the same thing TNT said about the enhancers. Non of his tested units had the same curve. I'm curious to see what OCD comes up with.

That probably has just as much to do with battery, ground, and stator output. (little black wire on stator is only ground wire going to ebox. After talking with msd support a couple years ago I run a ground wire directly from ebox to battery.