Has anyone installed this in your vehicles and bypassed the stock system? I have recently purchased an 88 iroc and wish to put a crate engine and HSR in and want to avoid burning chips everytime I make a mod..??

 

The ECM (whether stock or aftermarket) only sees sensors and injectors and such, and the signals from them; it does not have any way of knowing anything at all about the lump of aluminum out there, beyond whatever effect it has on what the sensors see (the MAP for example).

At the same time, the engine does not care whose name is on the box of electronics, as long as it gets the right amount of fuel mixed with the air it's ingesting, and it gets its spark at the right time. In fact, I even believe that if those conditions were satisfied, the engine wouldn't even know or care if the box was made by one of the engine mfr's competitors.

I've never "bypassed" the stock system with the Holley one; but I have removed the stock system altogether, and installed a Haltech. Pretty much the same thing as far as that goes, just yet another name on the box of electronics besides "GM" or "Holley". We used yet a different lump of aluminum besides a GM one or a Holley one, and nothing really seemed to care very much about that either. Even though they were competitors, they all seemed to play together in the sandbox quite nicely. I'd expect the process and results with the Stealth Ram and Commander to be rather similar.

 

Agreed. I'm running the 950 ecu w/ the harness and a HSR 355. Runs well considering It's still not "optimized". The stock ECU is gone and a big chunk of the stock harness.

You will hate the initial install, but the rewards are well worth it. I dicked around w/ the stock stuff for a long time. And after I got it running w/ the holley (much like any aftermarket ecu) software, in 2 hours I had a good tune.

 

any problems with hood clearance?
what kind of tune ability do u really get?
did u notice i big difference over the stock TPI?
does the computer controle spark? (I would think so but im not sure)
I know these are dumb q's but im doing the swap this winter and i want to beable to go to a turbo kit later so i wounder how the tuning will react to that

thanks

 

Now's a great time to start familiarizing yourself with the 950 manual. It's on Holley's site IIRC.
You might want to go to www.stealthram.com to get the intake info. I was told by a builder that had used the HSR on a turbo motor that it worked well. Which is why I bought one.
Other than the fact it doesn't fit a 1206 gasket out of the box it appears to be a decent design and does well when compared to other intakes of different designs.

 

Have a cowl hood, no clearance problems.
Very easy for almost any newbie to tune.
Yes.
Yes you can have the computer control spark.

 

so u completely ditch the stock TPI computer and add the 950 ecu? and thats it?

so u can dump all the extra stuff like emissions/egr and whatever else the stock ecu controls?

cuz the stealth ram kit for 2200bucks or so seems like a damn good deal... with ecu/harness, injectors, tb, fuel rails/regulator, fuel pump and filters, both intake pieces and i think thats it.

 

how much did it cost u and which ecu did u go with?

 

The only thing I have on the front of my motor is an elec. water pump, and altinator. So ya, you can ditch the factory computer. But somethings like a tach and speedo don't work, so that's something that you need to deal with. My timeslip has my mph on it and that's good enough for me.

I have no emisions. The intake, heads, headers, exhaust and whatever else is non emissions. Less weight.

 

well isnt the speedo's cable driven and dont require the computer?

and as far as the tach goes, i'm sure there is something that can be done... u would need a wiring harness wouldnt you? for a basic muscle car setup for all your gages and lights and stuff

 

The speedo on the later cars is electronic. Early cars don't have to worry about it.

And you can wire up the tach off the coil I guess. I already had an aftermarket tach, so I didn't worry about it.

 

I would as well considering they come in the same box.

This is very true. I converted my Edelbrock Pro-Flo to the Holley Commander 950 Engine Management System: http://www.edgesz28.com/edgesZ28/fuel.htm

The engine runs better than it ever did with Pro-Flo EMS. The Holley system is very easy to tune. If you buy the Stealth Ram you will get the C950. Holley has a good selection of base maps, and the a tuning process is similar to the Block Learn discussed over at the DIY forum here at TGO.

Not only is there a forum for Stealth Ram, but at Chevy Talk.org there is a EFI forum which is moderated by a Holley EFI engineer. There is very good C950 support there.

Here's the manual:
http://www.holley.com/data/Products/...99R10149-7.pdf

Here's the catalog:
http://www.holley.com/data/Catalogs/Holley(137-182).pdf

One thing to consider is how you will control your 700R4's lock-up function, if it is lock-up converter.

Good luck, Ed

www.edgesz28.com

 

Yeah but isn't there a kit out there to make 700R4's function with carburated non computer controlled cars... I mean I had one in my 68 Nova... It shifted like a champ.