Lou,

Thats great. I need to start soldering mine up..

Knowing what you know now, would you bother with the stimulator portion again?

matt-

Thanks guys.

Matt, yes, either follow their schematics to build a stimulator, or order the parts through them. It will pay for itself with time saved later. One thing that I identified right away is that the PROM came slightly undone (raised) on one side and one injector stopped firing. Took my 5 min to diagnose with the stimulator.

Lou

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Home of Slant6-powered fun machines since 1988

I bought the bare stimulator board, just haven't picked up the parts for it yet. I have everything to build the MS and the relay board, just need to clear a space on the work bench. One project at a time.. I was tempted to build the MS and relay board and going for it without the use of the stimulator. I should have ordered the bits for it when I ordered the other parts from digikey. I think I'll order the parts now so I can get started by the weekend..

Lou, I read that your Holley TBI looks like the one on your 360. Do you think that the 360's TBI:

1. Is a suitable size, and
2. Will interface to the MS?

I happen to have a '90 TBI off a 360 so I'm hoping it would work for this.

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It's a Slant thing. Even I don't understand.

1974 Duster, EFI /6 soon to be turbo...

Get that Monkay! Get that nasty thing!!

GunPilot,

The 360 TB might be OK, but I haven't looked closely enough to know for sure. If you can measure the throttle bores, I think mine are 52mm, and my injectors are 85 lb/hr (yours may even be smaller). I bet the TBs are the same and you can use it.

Matt, all the parts for the stim board are readily available at RadioShack too if you want to get them quickly.

Lou

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Home of Slant6-powered fun machines since 1988

My car is running pretty great but I can't seem to get the mixture consistant across different load, RPM and manifold vacuum conditions. I'm running a 9400 AFB. I have a database of all the jet and rod combinations that calculates and compares the orafice sizes and a Strip Kit. I'm tired of swapping jets and rods to correct one problem only to create another.

EFI sounds like the solution. I have a T3 turbo from a Grand National that will go in someday but the next step is FI. I guess I could sell the 3 Weber N2O intake in a box in my garage to pay for it. I WOULD like to hear a slant running on 3 Webers before I die.

One cool thing about slants is the intake/exhaust is so easy to swap out. I could try them all.

Mike

Hey mike,
You might consider selling off just the webers and using the intake for the efi. I'm doing an efi setup on a Lynx single DCOE style intake that I bought from australia. I have it all machined, just need to weld the bungs in. It's much easier than I expected it to be. Not sure what I'm going to use for a throttle body, I have one of a V8 ford truck with twin barrels, much like the side draft weber, but larger. It might work pretty well if I make an adapter. If you decide to do something this, let me know if I can help..

matt-

That sounds like a really great idea. I could bolt an intake plenum right onto the intake and put the throttle on the end. Cool, I think I know what my summer project is.

Who did your machining? What do I need to consider? Lets talk. I think I'm off work for the next week. It's a good time to start a plan.

Mike

I did the machining after hours at work. This is a test, but if it all goes well, I'll be doing a couple others. Next will be the twin SU style intake, that will look bitchen with a couple nissan 200sx throttle bodies. I may also do the clifford that's currently on the car. These will probably be sold eventually. I have a tripple SU intake thats real nice, but its a keeper, and therefor the last to get reworked if I do anything to it at all. I don't really want to do anything to it as it's the nicest I've seen, and fairly rare. It might be used with my injectorplate setup when I finally get one finished. Let me know if you have a particular interest in one of these, or if you'd rather convert your intake, and we can work something out..

matt-

Mike,
We should make a point of crossing paths at the spring fling show next weekend. Let me know if you're planning to attend..

matt-

Matt,

I would be very interested in that twin SU intake if you get some injector bosses on there. Let me know how that goes.

I have done more tuning on the MS, and it now officially runs better than it ever did with the Holley ECU - mostly throttle response is 100% better and WOT power is up. Unfortunately, I ran into a common problem with the MS driving the 1.2 ohm Holley TBI injectors - smoked a driver transistor so I had to temporarily switch back to the Holley for a bit. Should be fixed soon, and this has not been a problem for people running MP-EFI with high impedance injectors. Tuning is exceedingly easy with the O2 sensor hooked up and the laptop and MS software.

Woohoo!

Lou

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Home of Slant6-powered fun machines since 1988

Lou,

Cool beans. The MS is sounding like a good alternative to the GM computer in my howell kit. Whenever I get all the other projects I have half way finished on the car done, I just might look into swapping in the MS.

Lou,
I'll keep you posted on the intake progress. Did you add any extra resistance in the injector drive circuit? 1.2ohm is aweful low.

matt-

Matt,

I did not add any resistance based on Bruce Bowling's testing with my injectors and using the PWM mode. This, as I mentioned, did not work and I smoked the TIP32C transistor in the MS. Everything else was just fine and it was only a mild burnout (long time overheating). After replacing the TIP32C (15 min work), it works fine on the stimulator again. I will be running 3-4 ohms of inline resistance on each injector, which should work just fine. I plan to just use Chrysler ballast resistors.

Lou

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Home of Slant6-powered fun machines since 1988

Wow, this thing is really cool...good price too..! hopefully when i get to doing this to my Valiant there will be a full build up article posted with by the masters that did it first... thanks for all the research.... fuel injection simplified...!