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HummerGuy -> RE: Hummer H2/H3 E85 Flex Fuel upgrade/conversion kits Info (11/14/2007 2:58:24 PM)
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OK Here goes (for the third time [:@]):
(this is not an advertisement or site-sponsor. This is my own research and information collection and does not reflect any opinions of the site members or owners)
Full Flex International (the kit I mentioned above): http://www.fullflexint.com/
This system is a pass-through system. You disconnect your current fuel injector wires and plug them into the input of the Full Flex control module. The control module has plugs/cables that go out from the module and back into the fuel injectors. The module adjusts or compensates for the E85 by adjusting the fuel/air mixture. It can work with regular and E85, or a combination of both in the tank. The suggested retail for this kit (for a V8) is $499, and has been tested on the H2 and H3, as shown on their site. The contact who I've been in touch with has a H2 and H3 with the system installed and loves it. He said it's a 20 minute installation process if you know your way around an engine.
Flex Fuel US (the first and only EPA-certified system): http://flexfuelus.com/
This kit is a little different. This system requires you swap out your fuel injectors with ones provided with the kit. Basically, you remove your fuel injector wires, remove the injectors themselves, replace the injectors with the ones attached to the control module, and then plug the factory injector cables back into the new injectors themselves. I believe (not sure) this works the same as the Full Flex kit, but instead of controlling the exising injectors, you have injectors that have the connections built-in rather then having a passthrough system with extra connections. I think this system also replaces either your CO2 or O2 sensor though, as this quote from their site would suggest:
"Flex Box continuously monitors your vehicle’s engine emissions and adjusts supplemental fuel injection which allows your vehicle to operate at optimal performance. " There is also a picture on the main page of a CO2 sensor attached to the control module, so this system may work a little differently, but they have very limited technical data on it, and I have not heard back from this company yet, even though they are based 25 minutes away from where I work.
Also, according to FlexFuel's site, an EPA-certified kit means that your factory warranty is not affected by law. Also, certain states, including IL, have programs where you can get reimbursed for the installation of the kid. In IL, it's up to 80% of the cost of the kit. I have seen the kit on a web site for $425. The odd thing is according to the site, it will be available soon, as the Full Flex one is already available and has been used for over a year in the U.S. and other countries.
Full Flex has been installing them on the H2's and H3's for a while now, here and in other countries. They have not heard of any problems at all.
Full Flex is also willing to give a discount to our group here. The regular price of the system for a V8 engine is $499. I don't know what the pricing would be for the H3 yet since it's an I-5. I'll post it when I find out. I also don't know what the discounts will be yet, but will find out.
Again, this has nothing to do with this forum or it's sponsors. I did the research myself and everything in this post is my own information.
The system was designed for the stock PCM on the H2/H3 but it will work with a tuned PCM as well apparently, so that shouldn't be an issue. This is obviously not a replacement for a good PCM upgrade. I don't know what the mileage and power, etc. data is, but I can try to find out. Apparently though, the E85 gives a nice boost of power since it's rated at
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