Harris Performance TBI chip... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

H8PVMNT · 09-07-2011, 08:25 PM

The chip was $130 to my door.

The timing is set to factory specs and you are suposed to run 91 octane or if you switch to a 180 thermostat you can run 87. Honestly though I had both tanks full of 87 when I installed it and the truck ran just fine anyway. No noticable pinging or anything like that... Might have to do with the elevation here. I ran 91 since then and I have a 180 thermostat sitting on the seat waiting to be installed.

Since I posted I ran to town unloaded and all over town and I think I picked up a mile per gallon there.

09-07-2011, 08:25 PM	#1
H8PVMNT Registered User Join Date: Aug 2011 Location: Highwood, MT Posts: 24	Re: Harris Performance TBI chip... The chip was $130 to my door. The timing is set to factory specs and you are suposed to run 91 octane or if you switch to a 180 thermostat you can run 87. Honestly though I had both tanks full of 87 when I installed it and the truck ran just fine anyway. No noticable pinging or anything like that... Might have to do with the elevation here. I ran 91 since then and I have a 180 thermostat sitting on the seat waiting to be installed. Since I posted I ran to town unloaded and all over town and I think I picked up a mile per gallon there. Last edited by H8PVMNT; 09-07-2011 at 08:32 PM.



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