Trying to get back into the gm's

Hi my name is irrelevant so lets just stick with fuse lol. My first car was a 72 el camino I blew the motor build a some what nice 383 then sold it, you can see my little s10 in the background to sold it aaaa having a kid changes things. Around the same time as owning this car I became interested in japans cars I have been tuning hondas and nissans for a few years now but lately find my self longing to get back into the v8 seen. I have read almost all the stickys on the site and played with tunerpro a bit could any one link me to some more good reading? Why the tables stoping at 3000ish rpms I don't get it.
http://i298.photobucket.com/albums/m...lcamino383.jpg

:welcome2:

Sweet car!

Well maybe a post in the GM EFI section and some more info like what ECM and we will probably have some answers for you. And glad to see you found us!

:welcome:

Just looking for general reading on tunerpro gm related stuff.

:yikes: That's everywhere here!

Well we have a separate forum for TunerPro software:
http://www.gearhead-efi.com/Fuel-Inj...ro-Tuning-Talk

and separate forums for each ECM by mask code:
http://www.gearhead-efi.com/Fuel-Inj...ams-Tuner-Info

There's a Sticky FAQ in the GM system forum with loads of links to good info:
http://www.gearhead-efi.com/Fuel-Inj...ng-Error-Codes
But your best bet is always start a thread for discussion on what you have/need about your particular ECM/vehicle/issue etc... we all learn together! :rockon:

There's no flaming, insults or harassment here for newbie questions if that's what your worried about? Or old tuners that just forget from not playing with this stuff. Some of the most interesting conversations have started with questions so simple no one really knew how to answer, again we all learned!

Cool thanks.

:welcome:

Many GM calibrations "stop" at 3600 to 4200 RPM, due to the regular use of the vehicles. Most vehicles never see over 3500 RPM, so why add more code that would rarely get used? Once engine RPM goes higher than top RPM value of the table, it just uses the hghest RPM value in that load range, which again, in most applications is just fine.

There are some calibrations that go to 8000 RPM or so (Quad 4 comes to mind) and some other codes have been patched to use higher RPM tables.

True. I don't remember pushing my 383 much past 5000 now that you mention it. I don't own a gm at the moment so this may be a strange question but what ecu in the gm obd1 era is the most supported/widely used? Ill focus on that ecu for my study. The list of ecus that can be tuned on tunerpro just for gm is staggering and a little overwhelming.

I also picked up this book of moates http://www.moates.net/book-master-ef...ml?cPath=67_58 have any of you read it? Im hoping it will help me out a bit. It looks to be obd2 based but Im sure some of the info will cross over I hope.

Never saw that book before but would like to read it now... have read a few others. All have been general in nature.

what ecu in the gm obd1 era is the most supported/widely used? Ya just got the book for s***s and grins I have read other books on tuning ya general in nature for sure.

1227747, 1227727, 1227730, 16197427 etc... so many... what are you looking to do? TBI? MPFI? Certain car?

mpfi I think if my el camino was mpfi I would still have it lol. I probably could have tuned it to be a little more driveable and reliable. I don't have any ides set in stone yet but I think a mpfi v8 would be cool. Haven't really picked a body style yet.

1227727 $8D S_AUJP :thumbsup:

http://www.gearhead-efi.com/Fuel-Inj...Information-8D

Quote:

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what ecu in the gm obd1 era is the most supported/widely used?

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Most supported??? As in which ecm has tuning software available from the most software writers? That's probably the 1227747. Or most supported as in the one that people on an EFI forum are most likely to know something about? Well, that really depends on the forum. Truck ecm's like the 7747 or the 6395 are more likely to be known on truck forums, while car ecm's like the 1227727, 1227730, 1227165, and 1228063 are more commonly discussed on car related forums. Or most supported as in most likely to be found in a junkyard or on Ebay? Well, that depends on the time of the year and what area of the country you're in. Probably the single most commonly supplied ecm's from the factory are the 1227727 and the 1227730 which have been used with TBI and PFI on 4, 6, and 8 cylinder engines. If you're going to build an 8 cylinder engine and you're not planning to use forced induction then a 7730 with 8D would be a common first step.

Thanks ya just making sure Im studying an ecu that I may actually tune. So lets say I get to know the 7727 good and I get another gm with a different ecu will tuning it be about the same as tuning the 7727 or are the difference between the obd1 ecus drastic?

Same same, but different. :D

All the tuning concepts you learn with one ECM will carry over to another. It's more a matter of learning the concepts and how one parameter will affect everything else. That will carry over to Honda or Ford tuning, too. But they might call the parameters by a different name.

Split to new thread!
http://www.gearhead-efi.com/Fuel-Inj...7727-Questions