dorman intake - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-14-2007, 12:24 AM   #1
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did anyone compare the dorman intake and insert to the orignal gm unit look like the insert is differend for the pict i see here and the one i have here http://i178.photobucket.com/albums/w...ick/insert.jpg
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Old 03-14-2007, 12:53 AM   #2
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They're not interchangable. But they work the same way. They look like shorter runners, but they're not. The outer wall makes up the runner wall.
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Old 03-14-2007, 02:18 AM   #3
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Sorry firebuick, in the other thread I overlooked that you had linked up a picture.

On the OEM Delphi UIM insert runner, the "full pipe" section is longer, while the "half-pipe" section is shorter (though the overall length may be the same).

Could you post a photo of the inside of your Dorman UIM?
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Old 03-14-2007, 09:16 AM   #4
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Old 03-14-2007, 09:30 AM   #5
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Quote:
see that a made a sleeve for it just in case
What are you asking for? If you're referring to chopping the runners like in the other topic, I'd suggest you always wait to see if an idea works before attempting it yourself. This is why I rarely tell people HOW to do something until I've proven it even works.
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Old 03-14-2007, 09:36 AM   #6
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i was talking about the sleeve i made were the egr heat the plastic and sure i will wait before touching it since its differend i just hope to get the same performance than a stock one i will know because im testing before and after at the dragstrip
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Old 03-14-2007, 10:50 AM   #7
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Ok, so you're talking about a REPAIR, not a performance thing?
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Old 03-14-2007, 11:06 AM   #8
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its both its repair in regard of the egr but im always looking for improvement that y the porting of the LIM and the modified runner of the upper are topic that im watching . if i can help just feel free to ask
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Old 03-14-2007, 11:40 AM   #9
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In the pics you posted above, your EGR is ALREADY sleeved. So what are you asking about that?

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Old 03-14-2007, 11:41 AM   #10
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Although everyone may not agree, I like to size the sleeve used as a heat shield for the upper so that it just covers the plastic and does not extend upward into the airflow. This allows the top of the reduced diameter stovepipe to be cooled by inrushing air. If you extend the sleeve, you reduce the cooling effect on the hottest part of the system. Also, it is a good idea to keep the wall thickness of the sleeve as thin as practical. That way there is less mass to retain heat against the plastic and a greater insulating gap between the hot pipe and the sleeve.



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