Need help on this one....

[James Doerner]

I have a 2006 Hummer H3 i5, has a 4 inch Rancho suspension lift, 35' Toyo tires and I did Magnaflow exhaust and cold air intake. My question is what else can I do to make it preform better, EXAMPLE: I live in Las Vegas and I go out to the mountains and it does amazing but when I have 2 extra people and Hummer loaded up heading out through mountains to wherever or going camping when heading up Mountain I gotta keep it to the floor to just stay some what close to the speed limit. I really hate that and what else can I do to improve this? But once to destination and out playing it does amazing and have had to pull out some people which is a good feeling haha. Anyways new to this forum and I almost sold my Hummer for a couple reasons but after finding this forum and all the knowledge on here I wanna keep it now and keep modding it. Thanks to anyone who can help me solve this!!!

 

[digglesworth]

pcm tune may help ($200). itll change shift points and may help. plus they can tune to the mods you already have to pull a little more outta the engine.
the ported throttle body helps a lot with response. doesn't really add power.

 

[cgalpha08]

A couple things you can do.
1. Pcm tune by Pcm of NC.
2. Re - gear your axles unless you already have the 4.56 gears.
3. Could super charge it but I think that just leads to more problems
4. Get an E - fan, supposedly frees up a few hp

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[cgalpha08]

If you really want to...engine swap but that's whole different ball game than a few simple mods

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[James Doerner]

I have not geared it yet but yeah no super charger, everything else sounds like a good plan. It's more annoying then an issue but a lot of people say gearing will make a huge difference. Thanks on info

 

[954paulo]

Sounds like yours is automatic


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[James Doerner]

I thought about an engine swap but I was reading somewhere the 06 firewall doesn't have the indent or as thin as the 07 to swap a V8 in.

 

[James Doerner]

Yes Paulo its an automatic lol

 

[954paulo]

the pcm tune and a ported throttle body make a nice difference in the pick up of the truck. mine is a 5 speed and i notice the difference right away. much peppier then stock.

 

[rsc]

You could gut the cat for 10 hp and no codes on an 06. The other option is a header pipe for close to 30 hp. In conjunction with an e-fan and ported throttle body you should be set.

 

[silvrzuki77]

What part of vegas are you in? NW vegas here. Heading for a day trip saturday

 

[alrock]

Yeah, 06s and 07s need firewall modification for the V8 swap but that shouldn't be a huge deal.

I think the replies above have it covered, other than to tell your passengers to get their own Hummer so you can cut down on the weight.

Glad we are helping you keep your Hummer. BTW, if you want to change to a screen name from your real name from your FB sign up, please PM me and I'll fix that for you.

 

[digglesworth]

You could gut the cat for 10 hp and no codes on an 06. The other option is a header pipe for close to 30 hp. In conjunction with an e-fan and ported throttle body you should be set.

Shoot... I wanna know how you do that... What headers are out there that are a direct swap? Sensors and all.

 

[rsc]

HummerParts has a set for some $$$, Orion makes one, OverTheTopPerformance has some. I don't remember the three different links I was looking at a couple of months ago, but this will get you started.

http://www.ottperformance.com/store/pc/I5-Colorado-Canyon-Stock-Replacement-Header-298p1361.htm
http://mesablackworks.com/hummer,h3,headers#2
http://www.hummerpartsclub.com/mm5/...de=H&Product_Code=GIA_3303-3658&Category_Code

 

[rascole]

My old favorite...NOS....lol

 

[James Doerner]

Thanks for all the replies and I'm gonna try the re-gearing first which best price around here with great reputation is $1,950 and that's gears and all the other good stuff that needs replaced. @Alrock that's ok on screen name I don't mind, zero personal info on FB but thanks for letting me know. @Silvrzuki77 I'm North Vegas and north of Craig a couple of roads. Just went out today with a friend and you go down Nellis and head South and make a left onto Vegas valley dr and then a right onto Hollywood dr and it starts to head out towards mountains and all those trails go all over the mountains and most bring you back by Lake Mead main roads or turn around and head out. Going out again Sunday to hit some trails and hike Lava Butte, 2 Jeeps and myself with a group going your more then welcome to grab some people and join, more the better! PM if your interested. Sunday 11am meeting up.

 

[06 H3]

You could gut the cat for 10 hp and no codes on an 06. The other option is a header pipe for close to 30 hp. In conjunction with an e-fan and ported throttle body you should be set.

You gutted your cat on the 3.5? How do u like it

 

[06 H3]

You can't regear you have 4.56s and no one makes 4.88s

 

[silvrzuki77]

We are camping out saturday night. Thanks for the invite. I am currently near ann and 95. I have a rental over near craig and losee.

 

[digglesworth]

You gutted your cat on the 3.5? How do u like it

I'm curious about this too.....

 

[Renagade132]

I got Boria Titanium headers installed, and it made a big difference.

 

[rsc]

I'm curious about this too.....

I have an 07. I am on the fence about doing this or dealing with the potential manifold stud problems and going the header route.

 

[digglesworth]

I'd be worried about screwing something up and creating a problem that wasn't there. I'm not familiar with the stud problem either. I still have all the stock exhaust and am not a fan of the big dual tips to get ripped off on trails. If I got a header, I'd see if an exhaust shop can make a cat back and use some sort of aftermarket muffler to tuck up out of the way. But I'd want to make sure the header was a direct swap. No missing sensors to cause engine lights or throw codes.

 

[Mb30sdl]

Isn't $1900 a little too much? I am paying to regear 5.38(ORE put some cheap Indian made gears in) 1k including new bearings, seals u-joints and gears top quality not POS ( I am providing ARB air lockers).

 

[rsc]

The header is a direct swap, just make sure you get the right year model- 06's are the different ones. The stud problem is from using steel studs in an aluminum head. If you snap a stud you could possibly destroy the head drilling it out. The real problem comes when the back stud snaps, it is almost inside the firewall. There is limited room to get the stud out so many places want to remove the head to repair it. $$$