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

Shadow man · 07-04-2007, 03:28 PM

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.

Zukster · 07-04-2007, 05:20 PM

I'd wait for the Alpha. You not only get the V8, but also a much stronger front diff housing.

Shadow man · 07-04-2007, 06:01 PM

Quote:

Originally Posted by Zukster

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..

Bebe · 07-04-2007, 08:16 PM

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.

Shadow man · 07-04-2007, 10:40 PM

Quote:

Originally Posted by 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.

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.

Bebe · 07-04-2007, 11:06 PM

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

Halibrand · 07-04-2007, 11:15 PM

Merging onto the freeway, they're absolute gutless dogs. But when you get them offroad, you completely overlook it...

Shadow man · 07-04-2007, 11:18 PM

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.

Shadow man · 07-04-2007, 11:23 PM

Quote:

Originally Posted by Halibrand

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.

Bebe · 07-04-2007, 11:35 PM

Quote:

Originally Posted by Halibrand

Merging onto the freeway, they're absolute gutless dogs.

Maybe it's how you merge???

07-05-2007, 03:16 PM

It's weird to see H3 and Power used togeather

95yjbattles · 07-08-2007, 10:37 PM

go test drive a jeep whit the new 3.8

Non Urban · 07-09-2007, 02:22 AM

Quote:

Originally Posted by 95yjbattles

go test drive a jeep whit the new 3.8

Why?

Halibrand · 07-09-2007, 04:23 PM

Quote:

Originally Posted by Bebe

Maybe it's how you merge???

Am i pushing the pedal to the floor wrong?

Bebe · 07-09-2007, 04:54 PM

Quote:

Originally Posted by Halibrand

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.

Non Urban · 07-09-2007, 05:01 PM

Quote:

Originally Posted by Halibrand

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.

Bebe · 07-09-2007, 06:44 PM

Quote:

Originally Posted by Non Urban

Are you leaning forward in your seat when you are pushing it to the floor? If not, there's your problem.

Halibrand · 07-11-2007, 11:10 AM

Quote:

Originally Posted by Non Urban

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?

07-04-2007, 03:28 PM	#1 (permalink)
Shadow man Registered User Join Date: Oct 2000 Member # 1956 Location: SD Posts: 1,667	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. __________________ Obama: "I am constrained, by a system that our founders put in place." Last edited by Shadow man; 07-04-2007 at 03:29 PM.

07-04-2007, 08:16 PM	#4 (permalink)
Bebe flamethrower Join Date: Jul 2006 Member # 75270 Location: Auburn, CA Posts: 8,402	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 MFS H3 Long Travel Build Bink'sFab Capt Ahab FZJ80 Build My Dad's cool HotRod Junk Haulin the Groceries AND Haulin the MAIL

07-04-2007, 11:06 PM	#6 (permalink)
Bebe flamethrower Join Date: Jul 2006 Member # 75270 Location: Auburn, CA Posts: 8,402	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 MFS H3 Long Travel Build Bink'sFab Capt Ahab FZJ80 Build My Dad's cool HotRod Junk Haulin the Groceries AND Haulin the MAIL

07-04-2007, 11:18 PM	#8 (permalink)
Shadow man Registered User Join Date: Oct 2000 Member # 1956 Location: SD Posts: 1,667	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. __________________ Obama: "I am constrained, by a system that our founders put in place." Last edited by Shadow man; 07-04-2007 at 11:20 PM.

07-08-2007, 10:37 PM	#12 (permalink)
95yjbattles 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.

07-04-2007, 05:20 PM	#2 (permalink)
Zukster 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.

07-04-2007, 11:15 PM	#7 (permalink)
Halibrand 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...

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

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