H3 power - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Hummer
Notices

Reply
 
Share Thread Tools Display Modes
Old 07-04-2007, 03:28 PM   #1 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1956
Location: FT Rucker
Posts: 1,675
H3 power

Been out test driving rigs with the Wife. Test drove a 07 H3, auto, adventurer package equipped. The Wife and I liked just about everything about the H3, except the power. There was NONE.
Yes, I know it is the 3.7, not the 3.5, and it was a total dog.
Are they really that bad?

I did check into the supercharger for them, but that is a stupid price too.

I know the Alpha is due soon, but Jesus, are they really that underpowered?
I am still shocked.

So, is there a reasonable power remedy for the H3?
Also, what is the real mileage you guys with the 07 auto are getting? I am not really concerned with the mileage as we are Environmentally Indifferent.
I just have a hard time believing a rig that underpowered could get 16 and 20.
__________________
"Peace is that brief glorious moment in history when everybody stands around reloading."

Last edited by Shadow man; 07-04-2007 at 03:29 PM.
Shadow man is offline   Reply With Quote
Old 07-04-2007, 05:20 PM   #2 (permalink)
Registered User
 
Join Date: Mar 2001
Member # 3830
Location: somewhere just north of Mexico
Posts: 449
I'd wait for the Alpha. You not only get the V8, but also a much stronger front diff housing.
Zukster is offline   Reply With Quote
Sponsored Links
Old 07-04-2007, 06:01 PM   #3 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1956
Location: FT Rucker
Posts: 1,675
Quote:
Originally Posted by Zukster View Post
I'd wait for the Alpha. You not only get the V8, but also a much stronger front diff housing.
I am well aware of the Alpha and its improvements. Just interested in real world facts with this current model. I am not afraid to mod the 3.7 within reason. Havn't found much mod's for it yet though..
__________________
"Peace is that brief glorious moment in history when everybody stands around reloading."

Last edited by Shadow man; 07-04-2007 at 06:02 PM.
Shadow man is offline   Reply With Quote
Old 07-04-2007, 08:16 PM   #4 (permalink)
flamethrower
 
Bebe's Avatar
 
Join Date: Jul 2006
Member # 75270
Location: Auburn, CA
Posts: 8,956
Send a message via Yahoo to Bebe
There are PCM upgrades that will increase horsepower/torque on the 3.7 H3.

There are K&N Intakes, which some have used and like, others have had no increase in power. Definitely not an option if you wheel. CAI is standard so that one doesn't make too much of a difference.

Corsa exhaust seems to be the favorite, there are a few others.

The transmission is smart....meaning it will adjust shift points to your driving habits, mine seems to have plenty of power before I added 35's and a few hundred lbs of gear. Now it's a little slow, but the power seems to be there for me when I need it.

I have an 80 series Land Cruiser that really sucks on both gas and power, so I guess I don't really notice it that much.

I do get 17 hwy with 35's and full gear, I did get 20 regularly before I added the 35's.

Hope that helps.
__________________
What's all the Hub-bub about Blue Stars??? Click Here
Haulin the Groceries AND Haulin the MAIL
Bebe is offline   Reply With Quote
Old 07-04-2007, 10:40 PM   #5 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1956
Location: FT Rucker
Posts: 1,675
Quote:
Originally Posted by Bebe View Post
There are PCM upgrades that will increase horsepower/torque on the 3.7 H3.

There are K&N Intakes, which some have used and like, others have had no increase in power. Definitely not an option if you wheel. CAI is standard so that one doesn't make too much of a difference.

Corsa exhaust seems to be the favorite, there are a few others.

The transmission is smart....meaning it will adjust shift points to your driving habits, mine seems to have plenty of power before I added 35's and a few hundred lbs of gear. Now it's a little slow, but the power seems to be there for me when I need it.

I have an 80 series Land Cruiser that really sucks on both gas and power, so I guess I don't really notice it that much.

I do get 17 hwy with 35's and full gear, I did get 20 regularly before I added the 35's.

Hope that helps.
Good info. The one I drove seemed to have no power reserve above normal throttle. It made more noise and had higher revs when at full throttle, but no noticeable increase in power. I know sometimes vehicles will run better after break in though. This was a new vehicle.
__________________
"Peace is that brief glorious moment in history when everybody stands around reloading."
Shadow man is offline   Reply With Quote
Old 07-04-2007, 11:06 PM   #6 (permalink)
flamethrower
 
Bebe's Avatar
 
Join Date: Jul 2006
Member # 75270
Location: Auburn, CA
Posts: 8,956
Send a message via Yahoo to Bebe
I've had a couple of loaner adventure models. Lets just say they went back to the dealership a little peppier than when they left.

A heavy-ish foot for about 3 days usually takes care of it, but it really sucks the gas
__________________
What's all the Hub-bub about Blue Stars??? Click Here
Haulin the Groceries AND Haulin the MAIL
Bebe is offline   Reply With Quote
Old 07-04-2007, 11:15 PM   #7 (permalink)
Registered User
 
Join Date: Apr 2007
Member # 89354
Location: So Cal
Posts: 23
Merging onto the freeway, they're absolute gutless dogs. But when you get them offroad, you completely overlook it...
Halibrand is offline   Reply With Quote
Old 07-04-2007, 11:18 PM   #8 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1956
Location: FT Rucker
Posts: 1,675
I just checked with HP Tuners. They support the 3.7 pcm. That is great news. I have used LS1 edit for years and HP Tuners is easier to use. That is the PCM editor to use. I feel much better now as I can write a tune for the 3.7 and tune it for max power running premium fuel. That will be a huge help.
Also unlimited tranny control too.

Damn happy now.
__________________
"Peace is that brief glorious moment in history when everybody stands around reloading."

Last edited by Shadow man; 07-04-2007 at 11:20 PM.
Shadow man is offline   Reply With Quote
Old 07-04-2007, 11:23 PM   #9 (permalink)
Registered User
 
Join Date: Oct 2000
Member # 1956
Location: FT Rucker
Posts: 1,675
Quote:
Originally Posted by Halibrand View Post
Merging onto the freeway, they're absolute gutless dogs. But when you get them offroad, you completely overlook it...
We will do limited wheeling with it as it will be the Wife's DD. It WILL get wheeled though. Just no beating on it.
We have two Scouts for the serious wheeling.
__________________
"Peace is that brief glorious moment in history when everybody stands around reloading."

Last edited by Shadow man; 07-04-2007 at 11:24 PM.
Shadow man is offline   Reply With Quote
Old 07-04-2007, 11:35 PM   #10 (permalink)
flamethrower
 
Bebe's Avatar
 
Join Date: Jul 2006
Member # 75270
Location: Auburn, CA
Posts: 8,956
Send a message via Yahoo to Bebe
Quote:
Originally Posted by Halibrand View Post
Merging onto the freeway, they're absolute gutless dogs.
Maybe it's how you merge???
__________________
What's all the Hub-bub about Blue Stars??? Click Here
Haulin the Groceries AND Haulin the MAIL
Bebe is offline   Reply With Quote
Old 07-05-2007, 03:16 PM   #11 (permalink)
Alec W
Guest
 
Member #
Posts: n/a
It's weird to see H3 and Power used togeather
  Reply With Quote
Old 07-08-2007, 10:37 PM   #12 (permalink)
Registered User
 
Join Date: Mar 2007
Member # 88472
Location: loomis
Posts: 135
go test drive a jeep whit the new 3.8
__________________
run what u brung. broke dick wheelin.
95yjbattles is offline   Reply With Quote
Old 07-09-2007, 02:22 AM   #13 (permalink)
Registered User
 
Non Urban's Avatar
 
Join Date: Jul 2003
Member # 21175
Location: Tukwila, WA
Posts: 964
Quote:
Originally Posted by 95yjbattles View Post
go test drive a jeep whit the new 3.8
Why?
__________________
[COLOR="Red"][SIZE="4"][B]IF YOU DON'T STAND BEHIND OUR TROOPS,[/B][/SIZE][/COLOR]
[COLOR="White"][SIZE="4"][B]PLEASE, FEEL FREE TO[/B][/SIZE][/COLOR]
[COLOR="Blue"][SIZE="4"][B]STAND IN FRONT OF THEM![/B][/SIZE][/COLOR]
Non Urban is offline   Reply With Quote
Old 07-09-2007, 04:23 PM   #14 (permalink)
Registered User
 
Join Date: Apr 2007
Member # 89354
Location: So Cal
Posts: 23
Quote:
Originally Posted by Bebe View Post
Maybe it's how you merge???
Am i pushing the pedal to the floor wrong?
Halibrand is offline   Reply With Quote
Old 07-09-2007, 04:54 PM   #15 (permalink)
flamethrower
 
Bebe's Avatar
 
Join Date: Jul 2006
Member # 75270
Location: Auburn, CA
Posts: 8,956
Send a message via Yahoo to Bebe
Quote:
Originally Posted by Halibrand View Post
Am i pushing the pedal to the floor wrong?

How am I supposed to know ? I guess I'm saying you don't always have to be in front of the pack.
__________________
What's all the Hub-bub about Blue Stars??? Click Here
Haulin the Groceries AND Haulin the MAIL
Bebe is offline   Reply With Quote
Old 07-09-2007, 05:01 PM   #16 (permalink)
Registered User
 
Non Urban's Avatar
 
Join Date: Jul 2003
Member # 21175
Location: Tukwila, WA
Posts: 964
Quote:
Originally Posted by Halibrand View Post
Am i pushing the pedal to the floor wrong?
Are you leaning forward in your seat when you are pushing it to the floor? If not, there's your problem.
__________________
[COLOR="Red"][SIZE="4"][B]IF YOU DON'T STAND BEHIND OUR TROOPS,[/B][/SIZE][/COLOR]
[COLOR="White"][SIZE="4"][B]PLEASE, FEEL FREE TO[/B][/SIZE][/COLOR]
[COLOR="Blue"][SIZE="4"][B]STAND IN FRONT OF THEM![/B][/SIZE][/COLOR]
Non Urban is offline   Reply With Quote
Old 07-09-2007, 06:44 PM   #17 (permalink)
flamethrower
 
Bebe's Avatar
 
Join Date: Jul 2006
Member # 75270
Location: Auburn, CA
Posts: 8,956
Send a message via Yahoo to Bebe
Quote:
Originally Posted by Non Urban View Post
Are you leaning forward in your seat when you are pushing it to the floor? If not, there's your problem.

__________________
What's all the Hub-bub about Blue Stars??? Click Here
Haulin the Groceries AND Haulin the MAIL
Bebe is offline   Reply With Quote
Old 07-11-2007, 11:10 AM   #18 (permalink)
Registered User
 
Join Date: Apr 2007
Member # 89354
Location: So Cal
Posts: 23
Quote:
Originally Posted by Non Urban View Post
Are you leaning forward in your seat when you are pushing it to the floor? If not, there's your problem.
No, no room to lean forward when you've got the seat all the way to the dash and the steering wheel in your chest. Do these welding glasses make me look fat?

Halibrand is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 05:00 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.