MDS 6AL installed... new hesitation problem...
09-15-09, 01:14 PM
#27
Rotary Enthusiast
msd sells digital as well.
I found that with a modified engine the car starts up better with the msd.
I had no problems to 7950RPM on the dyno.
First time on the dyno I had no MSD, and a manual boost controller, second time I had MSD and a electronic boost controller- I gained almost 40hp in the midrange.
I found that with a modified engine the car starts up better with the msd.
I had no problems to 7950RPM on the dyno.
First time on the dyno I had no MSD, and a manual boost controller, second time I had MSD and a electronic boost controller- I gained almost 40hp in the midrange.
As for your results, what engine management are you running?
My results with the MSD on the dyno were with a stock S4 NA ECU. Every time the engine climbed above 6000, the HP graph went from smooth to jagged. (+/- 5 HP jumps on the graph) We replaced everything we could think of trying to smooth out the power above 6000 PRM: new plugs, wires, grounds, fuel pump... I even swapped out injectors with four brand new ones and made a second trip back to the dyno. No dice. As we sat there staring at the engine bay, the dyno operator noticed my MSD stuff. As a random thing to try, we pulled a stock coil off the shelf and instantly the problem cleared up. Two days later, I sold my MSD 6A and coils on eBay. LOL!
The 40 HP you picked up on the dyno, was it the boost controller or the MSD that picked up the power? I don't know. I do know that many people on this list have made great success with the stock ignition. Turbo applications of course are different beasts since 9 times out of 10, your using different engine management to control spark. (S4 ECU’s are a step above the stone age when compared to a modern ECU)
Don’t get me wrong, I’m not saying that “Multiple Spark Discharge” ignition systems don’t have their place under the hood. When I ran my MSD 6A, I too noticed a smoother idle and a snappier throttle response. It felt like the car was running better, but the upper end ignition break up was a deal breaker for me. If I had to do it over again, I probably would run two units on the trailing and leave the leading ignition alone.
09-15-09, 01:44 PM
#29
I know the msd did not give me the power, it was more the boost controller not leaking down.
I am running a wolf V500, the main point I was trying to get across was that I had good clean power right to redline and had a previous dyno session before that to sort of compare to.
I will say that for a stock car, especially a NA, it is a waste of time and money.
I am running a wolf V500, the main point I was trying to get across was that I had good clean power right to redline and had a previous dyno session before that to sort of compare to.
I will say that for a stock car, especially a NA, it is a waste of time and money.
09-15-09, 04:54 PM
#34
there is alot to be said for keeping things that work well simple, and on a stock car the stock iginition system is one of them.
20 years owning RX7s I never had one leave me on the side of the road, until my brand new MSD box, as in it ran for about 3 hours, 2 of which were on the dyno, crapped out on me. So here we are in the rain bypassing the msd so I can get the car home.
20 years owning RX7s I never had one leave me on the side of the road, until my brand new MSD box, as in it ran for about 3 hours, 2 of which were on the dyno, crapped out on me. So here we are in the rain bypassing the msd so I can get the car home.
09-16-09, 08:38 AM
#36
You had a problem because you did something wrong. A simple car really wouldn't be on a dyno anyways as it wouldn't have had anything done to it.
09-16-09, 09:42 AM
#37
I DID SOMETHING WRONG? Funny how the box that went in its place has been fine wired up to the very complicated 2 wires on the ignitor.
Dont compare exaust, wheels, and suspension to iginition. Different exaust or wheels will not leave your car in a no-start condition on the side of the road.
You want to argue for the sake of arguing thats fine, I said you can have your opinion and I can have mine, for someone to spend over $200 on a MSD box to run it on a stock car I feel you are not only wasting your time and money but you are complicating issues and putting yourself in a situation where that part can fail.
Dont compare exaust, wheels, and suspension to iginition. Different exaust or wheels will not leave your car in a no-start condition on the side of the road.
You want to argue for the sake of arguing thats fine, I said you can have your opinion and I can have mine, for someone to spend over $200 on a MSD box to run it on a stock car I feel you are not only wasting your time and money but you are complicating issues and putting yourself in a situation where that part can fail.
09-16-09, 10:43 AM
#39
Rotary Enthusiast
By that same logic it's best to keep the stock exhaust, stock wheels, stock suspension, stock radio, stock air filter (actually that one isn't worth replacing as the afm is more restrictive), etc. Simplest is leaving it all alone. If we are looking at something being good enough, then I'd still argue all of the above. It all seemed to work just fine from the factory. Why change any of it?
If you have evidence of MSD boxes giving real world performance gains, then I’d love to see it. From my experience, spending $200+ on one of these units to realize 1-2 RWHP and smooth out idle doesn’t seem like a wise investment, especially when you factor in the reliability.
How do you know he did something wrong? Did you personally verify his setup? Once again, your point is invalid and insulting. If you have a valid point to make, then go ahead and make it. Telling someone that they did something wrong doesn't automatically make you right.
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rgordon1979
3rd Generation Specific (1993-2002)
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03-15-22 12:04 PM
6a, 6al, 6k, badly, breakup, car, hesitateing, hesitates, hesitation, installed, mds6al, megasquirt, msd, run, rx7
