Just a quick question. Is the reason the majority of the top horsepower 4-bangers run distributers, is because they don't need the ECU to compensate for knock? That seems to be the only reasoning I can formulate for this. Anyone know for sure? This has no application to me, I'm just purely curious.
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"Youth in Asia"...I don't see anything wrong with that.
For ease of tuning and maintenance. Less electronic, easier to diagnose and cheaper too. I would love to see some setup casue I sure want it on my W41. It would be alot easier to work with the timming.
Gilles
2.3 Ho
Mfk-223 wrote:For ease of tuning and maintenance. Less electronic, easier to diagnose and cheaper too. I would love to see some setup casue I sure want it on my W41. It would be alot easier to work with the timming.
FYI, GM makes them for the ECO to run off of the intake cam I believe. If you changed your power steering over to the 95+, you could probably find a way to make it work.
Thanks for the input Gilles.
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"Youth in Asia"...I don't see anything wrong with that.
Here it is:
MSD distributor
I thought about it once but decided it wasnt worth the money for my setup.
Mfk-223 wrote:For ease of tuning and maintenance.
DIS= zero maintence, Distributor= regular maintenance.
Since the MSD eco distributor has no timing advance mechanism, the tunig for either is the same.
Mfk-223 wrote:Less electronic, easier to diagnose and cheaper too.
The distributor adds more electronic parts to the system.
DIS is the simplest system I have ever diagnosed, And having less parts means they are easier to test.
Mfk-223 wrote:I would love to see some setup casue I sure want it on my W41. It would be alot easier to work with the timming.
The system would be controlled the same in either case.
But if the distributor had a timing mechanism, changing weights and springs plus installing add-on units to do boost timing would hardly be easier than typing in #s on a screen.
The reason Eco dragsters use the distributor is that it gives them a conventional cam and crank signal in a compact package since the ECO lacks a cam signal when its DIS is removed and mostly every aftermarket EFI system cannot translate the 7x Crank signal GM uses to fire the system.
Also a waste spark system can misfire on high overlap, high boost engines and there are no upgrades to fix that.
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Quote:
mostly every aftermarket EFI system cannot translate the 7x Crank signal GM uses to fire the system.
Which is a little strange since an older DIS module will translate these signals, and it will work with simple resistors attached to the coil terminals. The older generation of OE DIS module isn't all that bright.
There's also quite a bit of wariness of the new / unknown in the racing world. Why shouldn't there be... if you know a distributor works, why would you want to use something else?
-->Slow
slowolej wrote:Quote:
mostly every aftermarket EFI system cannot translate the 7x Crank signal GM uses to fire the system.
Which is a little strange since an older DIS module will translate these signals, and it will work with simple resistors attached to the coil terminals. The older generation of OE DIS module isn't all that bright.
-->Slow
Yes it can, but most people do not know that and besides, you still lack a cam signal.
The simple reason for the Eco distributor's creation is that at the time, MSD only sold reliable, distributor based ignition systems for its racing customers (6,7,8 series), so they built a distributor to work with what they had.
It happened that the distributor helped many other products in the process, so it became common.
No one here needs a distributor.
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I find it alot easier with a distributor. What I meant is that with a distributor (eliminating the ecm), you only have the coil, distrbutor, wire and plugs. With the ecm, the ecm can go wrong, a sensor can give you hours of headache, the ignition module can be a PITA, ...
Hence why I said for ease of maintenance and less electronics.
If you keep the Ecm running the distributor, then by all mean I'm with you. DIS is simple.
But when you look at my setup that I got to talk to slowolej and get chip burned and burned and burned to find something that work "good", I see it alot easier to just use a carburator and distributor. Tuning with the ecm will take us a few months to get it right. Tuning with a distributor and carbs would take at most a day.
Gilles
2.3 Ho
^^^ Your case is a little different. In most cases I can make an engine run well enough to make everyone happy within a day. But I'm using my tools and my software and I have the car here to drive and work on. I've never even seen your car.
-->Slow
I understand that. The 06 chip is good like I've said before. I haven't test the other chips because that one was running fine enough for me for now. For some dumb reason, it runs ALOT better with a stock muffler and stock intake system ?!?!?!?
The car is not on the road yet but it will soon. I have 2-3 little things to fix and go.
Gilles
2.3 Ho
It's better at lower rpm? With the overlap of those cams and stock exhaust you may be diluting the intake charge with excess exhaust gas. This slows the burn and requires more timing.
-->Slow
With the 06 and CAI and exhaust :
When cold (when you just started it) it was missing when reving to 2.5k( like the sound clip) but it would not do it again after reving it once. What I mean by reving is bring it to 2.5k and keep it there for 4-5 seconds.
With the 06, stock intake and exhaust :
It was better with the stock intake. Less miss. Smoother too.
With the 06, stock intake and stock muffler on a 2.5"mendrel (no cat) exhaust :
I can hardly make it miss when first reving to 2.5k.
The 06 chip is leaner when just started (compared to the stock base) and it will get richer with the temperature of the engine. Engine get hotter, mixture get richer untill it gets to closed loop. Temperature is fine with the 06.
I also found my old AC pipe and took the sensor out and plug it in. The code will ONLY appear when you start the car and the heater is on. If the heater is off, start the car and turn the heater on, the code doesn't come on. With the 06 chip, I don't get any blue smoke at the back. What I don't understand is that 06 and 01 have the same base except 06 has 10* retard in PE but runs better than 01?!?!?!?
Gilles
2.3 Ho
