Holley Stealth Ram ECM issues
Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
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From: Rochester NY
Holley Stealth Ram ECM issues
I bought someones project 77 with a Holley Stealth Ram a couple years ago and have some issues with the ecm[ecu,pcm]. It has a 1992 Iroc 350 ecm and was wondering if I get it updated will it make any difference in hp? I now have a 355 400hp crate with side pipes. Anyone else out there have fuel pressure regulator problems with this set up and any thoughts on this TPI swap? Iv tried searching this subject but cant find the answer im looking for.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
If you're running the factory 92 TPI calibration on the ECU then yes, I can see why it wouldn't run well. Either find someone who knows how to tune these old ECUs or switch to a newer ECU like the Holley HP.
Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
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From: Rochester NY
Im not really sure what type of fuel regulator holley uses on these but iv heard from the grape vine that there not very good and need to be replaced by an after market part.
Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
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From: Rochester NY
WOW. I just looked up the price of the Holley HP. $1600 for the ecm and harnes is out of my price range. Looks like im looking for someone to reprogram the ecm.
Drifting
Joined: Jun 2012
Posts: 1,990
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From: Port St. Lucie Fl
Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
Likes: 2
From: Rochester NY
Im very confused on these pcms. If I wanted to update my gauges or have more codes should a just reprogram a newer OBDII from a newer car? I believe a 92 is OBDI. Id like to remod this car and wonder what my options are.
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Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
Likes: 2
From: Rochester NY
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
your options are
tune existing ecm - $100 plus cost of chips - slow and irritating
switch to obdII - cost of ecm and wiring harness, cost of software or pay someone to do it if you can find them. Most OBII systems use a crank trigger of some sort.
aftermarket efi - expensive up front but you get the software to tune your car. if you look around you can find older efi setups for a reasonable price.
tune existing ecm - $100 plus cost of chips - slow and irritating
switch to obdII - cost of ecm and wiring harness, cost of software or pay someone to do it if you can find them. Most OBII systems use a crank trigger of some sort.
aftermarket efi - expensive up front but you get the software to tune your car. if you look around you can find older efi setups for a reasonable price.
Race Director
Joined: Apr 2007
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From: South Western Ontario
I almost forgot, but you could do a dynamicefi.com conversion on the ECM and then you can tune it almost like a newer PCM. Cost is maybe around $400 or so.
You can tune the existing ECM with an emulator and get real-time response to any adjustments. It works even faster than using a OBDII PCM.
You can tune the existing ECM with an emulator and get real-time response to any adjustments. It works even faster than using a OBDII PCM.
Last edited by lionelhutz; Dec 30, 2016 at 07:58 PM.
Thread Starter
Instructor
Joined: Jan 2015
Posts: 101
Likes: 2
From: Rochester NY
I almost forgot, but you could do a dynamicefi.com conversion on the ECM and then you can tune it almost like a newer PCM. Cost is maybe around $400 or so.
You can tune the existing ECM with an emulator and get real-time response to any adjustments. It works even faster than using a OBDII PCM.
You can tune the existing ECM with an emulator and get real-time response to any adjustments. It works even faster than using a OBDII PCM.