has anyone tried it? what are the capabilities of the ECU and can it handle boost/nitrous. is it easy to install/tune? i haven't been able to find any first hand experience with this system.

 

Marelli ECM, and goofy injectors.
If you like Italian Electronics, and none servicable parts, it's an ideal system, IMO.

 

Not sure if you have checked out the DIY Prom board...but you should...the 165 (MAF) or 730 (MAP) ECMs would handle what you want...with the ability to be easily serviced, along with a LOT of support, as opposed to the Edelbrock unit.

Also, if the boost issue is a large concern for you, you can switch to the 749 ECM, from the Typhoon/Syclone...I know that others have done the same thing.

If you really want aftermarket, then go with the Holley Commander 950. It is a stand alone ECM that offers real time tuning (like the Accel DFI)...but it can't control your trans lockup or have a VSS input...

HTH,

 

well, the car is a non cc carberator motor and this system looked like a good upgrade to Fuel Injection mainly cause it is tunable with that little computer pad looking thing. i want to put a procharger on the motor soon but i also want some fuel economy. i would have to go to a double pumper carb inorder to do the blow through system. fuel economy and double pumper don't go well in the same sentence.

please don't tell me to go with tpi though, i can't stand the way it looks and the computer seems like it would be hard to tune without the equipment for burning chips.

i would like to go aftermarket, so the holley system is pretty easy to work with then? do i have to buy a laptop for tuning purposes? does it come with the programs for tuning?

 

The Holley C950 works off a simple table, load vs rpm & is very easy to use, is real time, on the fly programable (no chips to burn), has datalogger capability, ability to use a 2 or 3 bar MAP sensor for boosted applications. Yes, you will need a laptop, but nothing fancy, Holley's software will even run under Win 3.1 or Win95/98/XP. Holley gives you about 50 different maps to get you started with more available for downloading on there website. You can even download the C950 manual for free to learn more.

 

wow, thanks guys.

 

If you want to go with boost then the best answer is the GM 1227749. It is more accurate and IMO has much better resolution then any of the aftermarket ecms. Look at how large the steps are in the fuel tables if you want to see what I mean.

If you want Real Time Programming that's even an option with the GM ECMs now. Costs about $250 to make it real time, but that's alot less then $2,000.

Plus you can afford to carry a spare ecm or get one at Autozone if it takes a dump, an aftermarket means being down for a week.

Watch Ebay for someone that's given up on some single 4 barrel EFI, and use that manifold with the 749, add boost until you can't stop grinning.

 

How do you do that? I thought that the GM ecms did not allow on the fly tuning. Where can I read about Real Time Programming for GM ecms. Thanks...

 

 

It's a great system when you have to rewrite it. Why didn't they do it right to begin with?. Oh wait, never mind, if they did that then they wouldn't have an improved version for next year. Not to mention the average tuner is able to rewrite code.

If you get Tunercat R_T it is real time. No flashing to reburning necessary, and with the Romulator is alot less then a 950. ALOT less. You might investigate that, it's a great buy.

There was a time when the early Holleys were dropping like flies. And costing 350-450 to get fixed. I do alot of long trips, and just carring a spare is just good insurance in my situation. Having a backup available just makes sense, to me. Given the one in a million chance that your's does fail thou, what are you going to do?.

 

I still haven't seen the answer to an auto or manual tranny...if you have an auto, then the answer is pretty clear....GM ECM...

 

well, i already have the tci manual overide overdrive switch, soo, not too worried about the tcc capablities of the computer. i really don't know a whole lot and i guess that's why i am asking, eh?

 

How about your speedo? Because the VSS also doesn't work with the Holley Commander...which means that anything that the VSS contributes to, won't be a good deal...

Anyone else can chime in here because I forget exactly what else the VSS does, but I realized that I like mine

 

Actually, I just did a search and helped to answer my own question...

https://www.thirdgen.org/techbb2/sho...&highlight=vss

Apparently, ECM learning is dependent on the VSS input...the car will run, but not quite right without it...

 

i have the 2 1/16" cyberdyne digital speedo with calibration box. anything concerning my tranny has already been though of and has a solution all of it's own. i just want something to control fuel/air delivery...and it has to accomidate for boost.

 

Good...well, you have all the info, so good luck with the decision....

 

thank you very much, it sounds like the holley system is a good way to go, a wee bit pricey, but nevertheless, the best bang for the buck. thanks again guys.