Modified UIM Runners & Ported LIM..... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 03-08-2008, 11:15 AM   #1
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Default Modified UIM Runners & Ported LIM.....

I was starting to lose a bit of coolant over the past few weeks, so I decided to swap LIM gaskets and add a new UIM & gaskets, cleaned the TB and installed a new MAP sensor. I did nothing crazy on the LIM, I had a spare, so I worked on that, just in case. I just cleaned up the ports jagged edges and got as much crud buildup off it as I could. I modified the UIM runner'*, like TheDude did his: http://www.bonnevilleclub.com/forum/...ic.php?t=93856. Lower RPMs it does much better, revs to 5750ish now instead of 5500, the pull at higher RPMs is much better, Revs faster, best mod I've done so far. From a dead stop and the TC off I can squeal the 235 wide Pirelli'* without a hitch. Used FelPro LIM gaskets and Dorman UIM, Runners & Gaskets.

Super Mod!
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Old 03-08-2008, 11:24 AM   #2
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I have been in Jason'* car a few times, and I agree, it does pull pretty hard
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Old 03-08-2008, 03:54 PM   #3
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The best part is the price..............FREE!! I still havent had the time to pull all my plug, but I have not encountered any problems. Glad to hear it worked for anoth person too.
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