what ecm are you using when doing a ls swap

[anthonys 69]

Iv got a 406ci Chevy small block it is set up with a 58 tooth crank gear, crank sensor and a cam sensor and distributorless ignition, fuel injection and a Tvs 2300 supercharger. I can run a ls engine control module. My question which one. GM Factory ecm? Holley? Accel? FAST? Edelbrock? Which one or you using when doing a ls swap. Thanks for your help.

[anthonys 69]

Come on guys when installing a ls motor in your muscle car are you using factory engine control modules out of the car the motor came out of or aftermarket. And if so which one.

[69X22]

I'm running the 2002 Camaro ECM in mine. Since it has been tuned I havent had any problems.

[anthonys 69]

thanks tony do you think that is the norm using factory ecms

[FatfreeGTO]

I used the GM E38 ECM which was the correct ecm for my 2008 6.0l and I have the 90mm DBW throttle body, along with a t42 tcm to control my 4l80e. I didn't do the tuning because I didn't want to buy hptuners or efilive to modify the tune, instead I paid a shop to do it on their dyno and they used Hptuners.

I personally would stick with the GM parts, they should all be able to be fully tuned using the above programs.

You probably would want to call Speartech to answer some more of your questions

Main things you need to consider before deciding are
DBW or DBC

Are you going to run a MAF or be running a speed density system.

Auto or manual trans

Hope this helps
BJ

[anthonys 69]

thanks BJ yes that helps alot ill check with Speartech and check into hptuners

[The WidowMaker]

ive heard lots of good stuff about the holley hp system. i just wish there was a little more feedback. when i was talking with wegner they said they did a lot of "messing" with it on the dyno by pulling fuel out and trying to hurt the engine. they claimed that the holley relearned instantly and kept anything bad from happening. my knowledge of how all this works is minimal so maybe others will be able to fill in the large part im leaving out.

if i go gm i will either buy the gmpp harness and rework it for remote coils etc. or pick one up from psi. speartech gets lots of good reviews, but i cant justify the 700 over the gmpp or the 500 over the psi. ive never really found any difference between the e67 and the e38s in all my searching.

[69X22]

thanks tony do you think that is the norm using factory ecms

I think from my personal opinion that GM has allot more capital to sink into the research and developement of their cars. They have to last many miles without any issues that way people will continue to buy their vehicles. I also believe that if you have any issues with your car out on the highway or on a trip you will not have a hard time finding someone that can hook a diagnostic machine up to figure out what your problem is. I think even Autozone can do it. Also once it's tuned you shouldn't have to mess with it. That's why I am big on dyno tunes. I also run 2 Walboro 225s in my car for reliability. Probably a little more info than you wanted.

[69X22]

I almost forgot to add, have you ever called Holleys tech line? Not sure how how some of the other tech lines are.

[PHXSPEED]

I used a 2001 camaro ecm for my setup. Ls3/4l80 58x reluctor . I ordered a harness from SSP wiring and had them tap a lingenfelter converter box into it. Works perfect and it only took me an hour to wire it up

[anthonys 69]

thanks guy this is the kind of help I was looking for. I have called the tech lines they all say there system will do what i want and more. I know you guy have done this engine swap a lot of times so I’m looking for your expertise to find out what works and what doesn’t. thanks

[parsonsj]

I had a really big breakthrough with a MEFI4b (GM Marine EFI) controller. Inexpensive, and fully featured, with lots more capability than FAST or Big Stuff.

But the best around these days is the Holley Dominator. It's got everything, and great software, and a learning mode. Recommended.

[gasfumes]

How much would a holley dominator setup run for ls2 for complete kit ?

[dj3]

Im running the Holley dominator on a LS2 with DBW and it stats and idles with no problems, but I haven't drove the car yet. You will need the ECU, DBW harness, LS1 harness (24x) and O2 sensor. You can download the software and flip through it before you buy anything.

[nine lives johnny]

i have the holley hp efi. and i love it!!! easier to tune then a cab.

[parsonsj]

easier to tune then a carb

Not to be critical, but I've found every single system I've messed with to be easier than a carb. I mean, swapping jets? Reading plugs? Looking for highest vacuum at idle? Yuck. Give me a laptop and a wideband readout any time.

[anthonys 69]

look like the holley is on the unfair camaro. anyone have an idea of price.

[Mike Norris]

There are a few options with the Holley EFI setups and it will depend on if you are going with a cable drive TB or a drive-by-wire TB, if you are running and 4L60/80E trans and if you want to use a single or dual channel wideband oxygen sensor package.

The base HP LS Setup for a Cable Drive TB and single NTK Wideband oxygen sensor retails for about $1500. A complete Dominator setup for a 4L60/80E, DBW TB harness and a dual NTK WB sensor setup you get a retail of about $2700. Now from there you can find some deals and if you are interested, PM or call me and I can give you a quick consult and quote.

Hope that helps and let me know.

Mike Norris

[anthonys 69]

thanks mike it great to be able to look around this site talk to people and get advice before buying this kind of thing. Ill be sure to contact you before I buy anything