H3 Simple Mod Too Good to be True?

[LilJashy]

So, I'm very new to the world of upgrading Hummers (or any vehicle, for that matter) and I found this little deal that seems WAY too good to be true. Life experience has taught me that that probably means it isn't true. Anyone done anything like this or know about it that can help me out?
https://www.chipyourcar.com/product/hummer-performance-chips/

 

[ericemir]

Garbage. Find a local tuner and get a professional tune.

Try this instead

https://www.pcmofnc.com/product/hummer-h3-mail-order-tune/

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[ericemir]

Year make model? Engine?

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[LilJashy]

07 H3 3.7l Inline 5

 

[LilJashy]

Forgive my lack of knowledge, but those gains seem pretty negligible. Is a 10hp difference worth it?

 

[alrock]

One of the best things about the PCMforless tune is that they modify the shift points on the H3 to make it much nicer to drive - there's less hunting of gears. HP gains on products like the chip above tend to be at the high end of the RPM range and would be negligible in the normal operating range.

 

[zebra]

vehicles quit using 'chips' after ~1995 with the start of OBDII and electronically reprogrammable engine computers.
any company that still calls their product a 'chip' for a modern vehicle instantly loses credibility in my book.

 

[Gpcalero]

CHIP it broooo :asoff:

 

[Gpcalero]

Forgive my lack of knowledge, but those gains seem pretty negligible. Is a 10hp difference worth it?

10 hp peak difference most likely. More important is the drivability/feel of the vehicle and the gains throughout the entire curve of the powerband. There may be areas in the RPM range where you gain more than 10 hp.

May not sound like it, but usually a tune helps "wake up" a vehicle.

 

[LilJashy]

Sweet, thanks guys. That's definitely what I was expecting on the chip, but couldn't pass up on such an easy upgrade if it actually did work

 

[ericemir]

Worth a shot I get it. If your decide to do the pcmofnc and are interested in the efan conversation just remember this

Efan are nice and save you some mpg
Mech oem fan provides better cooling under extreme conditions. Like towing or climbing a steep grade. I like the efan but won't use it due to my specific usage. Heavy towing, and Florida high temp and humidity.

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[Gpcalero]

Worth a shot I get it. If your decide to do the pcmofnc and are interested in the efan conversation just remember this

Efan are nice and save you some mpg
Mech oem fan provides better cooling under extreme conditions. Like towing or climbing a steep grade. I like the efan but won't use it due to my specific usage. Heavy towing, and Florida high temp and humidity.

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You are right about the OEM fan in regards to higher CFM.

However, I believe with the right setup you'll be fine. I have had success with my V8 dual efan setup from Supermodulation in combination with an ECP aftermarket radiator. No issues when towing my mustang to and from the racetrack in the Florida heat.

 

[ericemir]

Aftermarket radiator is nice. Do you have a link to this?

Sorry OP for tangent conversation.

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