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Which ECU to go with??? S10 (Sonoma) 6.0/4L80E swap

 
Old 08-06-2018, 12:19 PM
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Default Which ECU to go with??? S10 (Sonoma) 6.0/4L80E swap

So Iíve picked up my newest project and I have a pretty good idea of which way I want to go with it. Before I ask questions, hereís what Iím working with.

I bought a clean 2001 Sonoma regular cab 2wd and a 2001 2500 HD donor. The donor has a good running 6.0/4L80E in it, which I plan to treat to a few upgrades before it goes in the Sonoma. Iíve got my work ahead of me, but it should all mostly be time consuming, no earth shattering fab. One thing I am going to do is boost it though. Due to packaging Iím leaning toward a Whipple 4.0L right now... weíll see how things pan out as things progress. No matter what, it will have forced induction in one form or another.

The one thing Iím not 100% sure of is which way to approach the tuning side of this build. Hereís whatís been going through my mind.

Option 1: Having the donor running (for now), Iím obviously wondering if I can use the OEM ECU to handle the task at hand. I know I could tune it using scaling, but I donít know if other features would become a hindrance. I want to keep the air conditioning, and itíd be really nice to keep the cruise control. If I use the 2500 ECU will I still be able to keep the cruise?

Option 2: Is there any way to tune the OEM 4 banger Sonoma ECU to run a V8?

Option 3: Aftermarket fuel/spark management. I realize that this option will most likely result in losing cruise control, but that wouldnít completely break my heart. I was thinking if I go this route possibly going with the Holley Dominator EFI. I am a little behind the times on stand alone systems, but I know that the Holley would definitely let me tune the engine, control the trans, and also let me use speed density instead of MAF (can you convert the OEM ECU to speed density?).

So so I guess what Iím looking for is some experienced advice on what I can and canít do with the factory ECU(s), opinions/suggestions on which way would be best to go, and if thereís another system other than the Holley I should check out please let me know.

Thanks in advance for any help.

Last edited by nickpohlaandp; 08-06-2018 at 12:55 PM.
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Old 08-06-2018, 12:44 PM
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Speed density does use MAP(manifold absolute pressure), but not MAF(mass air flow)
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Old 08-06-2018, 12:54 PM
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Originally Posted by G Atsma View Post
Speed density does use MAP(manifold absolute pressure), but not MAF(mass air flow)
Duh, I know that. That was a typo. Iíll fix... sorry
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Old 08-06-2018, 01:34 PM
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Oh OK, lol. I've done that more times than I care to recount.....
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Old 08-06-2018, 02:37 PM
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Current performance makes a harness to plug right into your existing setup or u can pull the engine harness and pcm and use the fuse box and harness off your donor motor converted to standalone stock pcm turbo 5.7 meth injection th400 over 800hp street driven on mine it's a easy platform if u plan it out but room fills up quick so be sure to come.up with a good plan
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Old 08-06-2018, 02:41 PM
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Best thing I've done to help with my setup is built the 8.8 for it the caltrac bars and the tubular core support. It gave me extra room up front for intercooler and radiator. Stock 4.3 radiator and two good fans 100% meth injection two 340lph pumps in tank 8an feed Holley rails 1100cc injectors boost referenced regulator 6an return stock fuel tank Stock cluster
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Old 08-06-2018, 02:46 PM
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Originally Posted by Dimeomboost View Post
Best thing I've done to help with my setup is built the 8.8 for it the caltrac bars and the tubular core support. It gave me extra room up front for intercooler and radiator. Stock 4.3 radiator and two good fans 100% meth injection two 340lph pumps in tank 8an feed Holley rails 1100cc injectors boost referenced regulator 6an return stock fuel tank Stock cluster
Thanks for the info. Iíll look up Current Performance when I get done with work today. As for the rear end, Iím going 9Ē and triangulated 4 link (Iím going to fab that up). Thanks again
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Old 08-06-2018, 05:17 PM
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Have u thought about 8.8 ends on the nine inch. The explorer brake are disc and adapt easily to s10 lines also they clear 15" wheels. Not sure what brakes cost for nine inch but it's just a thought if u 4 link it be sure u box the frame in where it's open. I've seen a few twist behind gas tank in front of axle
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Old 08-06-2018, 05:50 PM
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Originally Posted by Dimeomboost View Post
Have u thought about 8.8 ends on the nine inch. The explorer brake are disc and adapt easily to s10 lines also they clear 15" wheels. Not sure what brakes cost for nine inch but it's just a thought if u 4 link it be sure u box the frame in where it's open. I've seen a few twist behind gas tank in front of axle
The 9Ē comes with disks and yes, I have every intention of boxing the frame. I hate the extra weight, but I want it to be solid. I even thought about lightening holes down the frame, but Iím not 100% sure of the structural implications of doing that. Without being 100%, when it comes to chassis, Iím not taking the chance.

You donít happen to have any pics of your tube front end, do you?
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Old 08-06-2018, 05:54 PM
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Originally Posted by Dimeomboost View Post
Have u thought about 8.8 ends on the nine inch. The explorer brake are disc and adapt easily to s10 lines also they clear 15" wheels.
Oh, I also have a SN95 8.8 sitting in my shop. I might use that to start since it already has good control arm mount locations built into it, but I want to end up with the 9Ē for quick gear changes.
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Old 08-06-2018, 06:03 PM
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The stock computer should do. But personally, i'd run a megasquirt 2 or 3. Way more options, flexibility and not terribly hard to tune.
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Old 08-06-2018, 06:12 PM
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Originally Posted by Mymonte666 View Post
The stock computer should do. But personally, i'd run a megasquirt 2 or 3. Way more options, flexibility and not terribly hard to tune.
Thanks for the direction. Iím not scared of the tuning portion at all, just not really sure what out there anymore. Obviously when you search for stand alone systems the Holley pops up first. I just mentioned it because Iíd read about it, I have no experience with it, so it makes no difference to me what system I use. I just want to make sure whatever I use has the capability to do what I want it to do. Hell, the last time I wrote a full tune on something was a turbo small block with a TEC3 when they first came out... does that date me, lol!
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Old 08-06-2018, 06:28 PM
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Originally Posted by Mymonte666 View Post
The stock computer should do. But personally, i'd run a megasquirt 2 or 3. Way more options, flexibility and not terribly hard to tune.
Will the MS system run my electronic speedo and the 4L80E trans? Also, can you make adjustments to the tune in real time or do you have to log-tune, log-tune, log-tune... ?
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Old 08-07-2018, 08:13 AM
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It should have no problems running the speedo. As far as the transmission, you'd need a separate unit ( microsquirt to run the trans). On my setup i have the megasquirt running the engine and a stock computer for the trans. Yes you can do real time tuning and auto tuning. You set up yor target afr and the comp will adjust to it and if you like it, you save the changes.

So you have an idea, this is my setup all run by the ms: 427 dart little m. 2x 68mm turbos
16 injectors, running staggered, meth injection. Turbo bypass( the computer will allow me to route all the exhaust to one turbo while launching to build boost quicker, then progressively transition to the other one.
All boost control is done by the ecu, together with traction control. My trans brake is also controlled by the ecu. On cheater mode i use a photocell that will tell the computer when to release the tbrake when the tree changes with hatever delay i program to it. (Not legal) fuel pumps, fans and water pumps for the intercooler is also controlled by the ecu.
The 4l80 runs off the stock computer and is programed with hpt. Just have to feed it 12v, rpm, map, tps and vss and is gtg.
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Old 08-07-2018, 08:46 AM
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Originally Posted by Mymonte666 View Post
Sounds like a sweet setup. Itís definitely more than what Iím planning. At most Iíll have a 2 step, brake, and water/meth on boost over 8psi.

I have the stock computers and harnesses, so using the stock TCU is easy enough. By hpt Iím guessing youíre talking about HP Tuners? Does that communicate with the TCU via the OBDII port? Like I said earlier, Iím not worried about the actual tuning part, I can handle that. What I need to learn about is how to get everything else to work along with it. When I used TEC2ís and TEC3ís there were no ďgaugesĒ that I was concerned with running... this part is somewhat new to me. Thanks again, I really appreciate your time.
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Old 08-08-2018, 05:05 PM
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Ya hp tuners is what i was referring. On you donor car the ecu tcu is the same unit. You woud connect trough the obd port. If you check sloppy mechanics site under cheap tcu it explains in detail how to do it.
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Old 08-08-2018, 05:20 PM
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Originally Posted by Mymonte666 View Post
...On you donor car the ecu tcu is the same unit. You woud connect trough the obd port. If you check sloppy mechanics site under cheap tcu it explains in detail how to do it.
Gotcha. Thanks for clearing that up. I probably wouldíve searched a bit before Googling that one. For some reason I was sure they were two separate computers. Iíll check out that website. Thanks.
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