LS2 Engine swap info
 

So ive owned my 06 H3 for about a year now and the only thing I cant stand, besides being the #1 vehicle pulled over, is the lack of power in the 3.5l I5. Ive researched and thought about FI, and this little engine just really isnt built to handle it to the extent i would want it to. SO in comes thought 2, ENGINE SWAP.

Ive read in other forums about guys with colorado and canyons swapping out with LS2s and have found a company called Current Performance that makes mail out kits to do it on them. With that kit it means you could do it for almost as much as doing a custom turbo kit. And with all the simularities with them and a H3 i figured it should work. i found something on some guy doing this to an H3 but it was really vague.

Does anyone have any info on the swap in a H3 specifically?

I don't know, but if you do it please keep us up to date on it. The LS2 is a great engine.

Ive already started to collect and search for parts....its a matter of time and money on doing it now. Im hoping to do the swap some time in the winter to spring.
I found a LS2 out a GTO with a 4l60E that has already been beefed up. that would save time on modifying my stock 4l60E.

I keep reading people say this!!!!!
I have an 07 and think it has plenty of power for what it is .....it's not a sports car
and when I pull my race trailer I'm not going to pull out and pass someone doing 70..but it can pull the ass out of an Elephant..
this thing weight almost 5,000 pounds ....it's made for off=roading not the drag strip



just my 2

Apparently, it is made for the drag strip, too.

http://www.youtube.com/watch?v=dL21gvW3a48

I get your point mbrannon64...

my needs are a bit different. this is a toy that i plan on putting up on 38s and want the LS2 so i can spin them. haha. i dont plan to drag this thing, although i probably will just to see what it runs. think about it an H3 on 38 inch boggers that runs 12s....that would be fun.

I have an LS2 in mine. I've posted it a couple of times before. Much better than the 5.3 in the Alpha (which has a whopping total of 60ish more HP than the I5) and my gas mileage is hardly changed at all (16-18 highway):

https://farm4.static.flickr.com/3183...f0b8cf8b81.jpg

Current Performance did my wiring harness and I got a PCM from them, but I had to get a junkyard harness because some of the connectors are made by Sumitomo. They have mounts for the Colorado, but they don't work unless you get the Alpha specific oilpan. That's where the similarities end. An H3 is not just a redressed Colorado--they are not as similar as you might think. The stock transfer case on the H3 is Japanese (Isuzu, I believe). You will need to get a 4l65e for the transmission to bolt up to the transfer case ( l looked into the 4l60e and it may not work, and you also lose your traction control (who cares!).

Although I have done many engine swaps, I farmed this out to Mike Mash in Wichita. This was a difficult swap because you need to get the right combo of accessories for the front. Mine was the test subject though and he has a pretty good handle on this. He does a lot of H2 drivetrains into H3's and that is more straightforward. You might give him a call, especially if you don't have the ability to lift the body off of the frame. It's much easier to do the swap that way. I would do the swap again in a heartbeat

[QUOTE=rugbyman00;205584]the only thing I cant stand, besides being the #1 vehicle pulled over,/QUOTE]

So your recommended solution to being the #1 target for speeding tickets is............. wait for it ........... MORE POWER.

Oh well, to each his own. Ya do what you gotta do.

That was so CQQL Hollywould! Thanks for the link!

So guys how much does a used LS2 go for?

How about the OEM Supercharged Corvette/ CTS-V engines!!! Wow, that could kick some A$$!

I'd rather go with a supercharger kit on the I-5 or a Diesel conversion, but that's just my own taste.

I wonder if picking up a salvage yard Trailblazer SS and then dropping it off along with your H3 in Wichita would be helpful? At any rate, I'd definately give that Mike Mash fella' a call!

A guy named "Nugget" in the other Forum put a turbo on his 3.7. Didn't like it so he converted to a supercharger. He was an Aussie. Anyone see that?

Bob

I had a turbo Diesel car about 10 years ago and it was nasty in the rain and snow. I can see how a turbo engine wouldn't be fun or controllable off-road.

I considered forced induction and even fabbed up a manifold for a turbocharger. I would only get to 300 hp at reasonable boost levels and have drivability problems. That's why I opted for an LS2 crate engine. I wouldn't add any more power to it though. When I floor it, the whole car lurches to the side a little from the torque. It's definitely not a drag vehicle. I have a heavy duty tranny from Monster Transmission and it sounds like I'm killing it at full torque.

We did a Trailblazer SS test drive before buying our '06 H3. I still remember the strong, smooth, and progressive power delivery!

Yeah, the Trailblazer SS was my inspiration for this project. I call mine the "Hummer SS". Nice smooth power delivery across the RPM range, no compromises, really. As I said, my gas mileage hasn't suffered if I'm good with the gas pedal, and in fact, I get better MPG's than others on the forum with their I5's.

ya im not too worried about traction control haha. Your right about the 4L65E but what about a 4l85e haha. GTO's come with a ls2 4l65e combo. but most likely ill end up getting a new crate motor and tranny, maybe a LS9...... but did you replace your transfer case? I was thinking of maybe using a spicer 18 or np205 if theres room.

that already crossed my mind, but i plan on doing a 41 chevy with a duramax.

check this out....
http://www.dieselpowermag.com/featur...max/index.html

The Hummer in the Youtube video belongs to a friend of mine in Brisbane Australia, it still runs an I5 3.7 with a Vortec supercharger. I have driven the car and it goes like a bat out of hell it is cranking out over 400hp at the flywheel and is 100% reliable. I am going to do mine when I can afford it.

swap looks good!

This is not that hard to do and alot cheaper than buying a V8 hummer. You should be-able to do this for about 5 grand if you shop around a bit.

Check this out it is a colorado but, very similar, and based off the same platform as the H3. At the end of the thread you will see a list of possible parts needed.

https://www.hummerforums.com/forum/o...ou-guys-23952/

The trans won't directly bolt up, automatics just have to swap input shafts, bell-housings, torque convertors. The 4l65E from your I5 hummer will work with these mods!

Ma5 manual needs new fly-wheel clutch, advanced adapters bell-housing, trans spacer, and a few mods here and there.

06-07 hummer should use E40 PCM and 24x ignition motor.
08-12 hummer could use E67 and a 58x ignition motor.

You can go either way, but sticking with the above rule is the easiest.
in 08 hummer changed the fire wall, and frame rails for the V8 making room for a truck style intake. The older models will work still, just use the car style intake manifold.

Current performance, makes engine mounts (called colorado LSX mounts) should also work on the H3 hummer.

I offer wiring harness, etc

First, welcome!:D So you know how to modify the oil pan to get a V8 into an I5 h3??? Oh, and you know about the clearance issuse with the front driveshaft too???:rolleyes:

You are WRONG! H3/H3T Platform is GMT 345s. The Colorado and Canyon are GMT 355s. I have nothing bad to say about the 355s, personally I have owned 3 of them in the past.

H3s only share 10% of any off the shelf GM parts. You may want to do some research before throwing out blanket statements.
-Engine, Trans and a few other parts are "similar" then the difference begins.
-Our frames aree boxed with different crossmembers and assed crossmembers
-We use mostly 1/2 ton running gear
-Etc, Etc, Etc

Oh, and the H3 rear diffs are open, unless they are Adventure/OffRoad package vehicles which have an Eton Electronic locker. I5s have 4:56s and Alphas (V8s) have 4:10 gears

So it looks like you are trying to "sell" us some engine swap wiring harnesses. Hmmm, you don't know the differences between the GMT 345s and the GMT 355s but you know all about what will fit and work properly????????:rolleyes:

Please tell me how to edit a posting?? I would like to remove anywhere were it says I can build you a harness.

If a Mod does this than, I would depreciate leaving up the other info, as it is useful to people, and does not benefit, me in anyway!

Also I removed the words in my sig, until someone let's me know if that is ok or not! Again sorry, and no need to nail be to the wall I honestly didn't mean to upset the apple cart, and offend you Tainter! My name is Jamie, and maybe you will forgive me, and teach me all I want to know about 345, some day!!


The 345s as I have so graciously learned from.. you!!! And you have certainly rubbed it in!! Are similar enough wiring wise..at least engine wise, that yes I can build a wiring harness! You obviously can't just take a harness meant for a COLORADO SWAP and install it on a 345 hummer!!

Sorry I don't know every exact mechanical difference, from a Colorado to a H3!!!

"So you know how to modify the oil pan to get a V8 into an I5 h3??? Oh, and you know about the clearance issuse with the front driveshaft too???" never said I did (I will wispier that the LH8 pan will most likely work, on hopes that you don't crucify me!)

"Oh and you can buy an Alpha for less than the $5000 engine swap difference." Maybe true I was just laying the options out there, perhaps "JOE" has spent 25,000 in wheels stereo upgrade, and 10,000 in custom paint. Now it is a little bit more worth it to swap in a V8

Maybe someone wants to build a custom high performance, motor..like a 6.0 or 7.0L then there is no point getting a factory V8 to, do that to!

Didn't bother reading this did you???? before diggin up OLD threads!!!! :rolleyes:

https://www.hummerforums.com/forum/h...bumping-23221/

No reading or research by 04colyZQ8, just posts about his amazing wire harnesses and how he thinks there can be an engine swap in a GMT 345 for as little as $5000!

Well I also said, if you shop around (and I should have included doing the work your self) for about 5000.00 perhaps a bit low just throwing some figures out there!


I said tell me how I can delete the info related to what I was offering, or have a moderator delete it, in fact the can delete all my posts if they want, I am sure that would make you happy!!

I am off work (compressor mechanic) with a injured hand, and I was bored, and doing research and stumbled across some (notice how I put "some" instead of "a lot".... see I do listen to what you have to say, despite, how it makes fee feel) similarities between the H3 and colorado/canyon, so I joined this forum and started posting.. and digging up damn near every engine swap thread I could find!

You should have scene how excited I was when I found the one with pictures, I grabbed my friend who helped me with mine to show him, as well!

I was just excited in finding something new to me and I didn't realize I was "necro" posting, I see that I was now, and I am sorry, I wish there was a way I could change it!

BTW I was just looking to do some stuff on the side as a hobby, just looking to cover costs for the special tools and equipment that I bought, for the colorado/canyon trucks. I realize I look like some "big shot" trying to through my stuff at everyone, this was not ever my intention I sincerely apologize!

Tainter I hope we can somehow come to a understanding, I wish not to be hatted by you or another member, the last thing I need for starting something new is to have the reputation I seem to have created! I also wish not to create or have enemies on a personal level! I do not hate you or think ill of you, however your words do hurt, and have got my blood pumping nicely...lol!

nope sorry never heard of "necro" bumping before today.. all though I clearly wish that I had!