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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 11-03-2007, 01:32 AM   #11
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Quote:
Originally Posted by Speedster400
get your self a gasketkit so that you can make sure that you dont make the port too big.

On a case that you cant port the heads at the same time, i would want the port in the LIM to be smallr then the intake port on the head
gasket for reference. but get a micrometer. measure, cut, measure, and repeat.
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Old 11-03-2007, 02:23 AM   #12
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remember to take a little off at a time, if you over port it, the LIM is pretty much usless then. Unless you have goo TIG welder and can weld aluminum REALLY good
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Old 11-03-2007, 04:28 PM   #13
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Read this thread. Willwren gives specs on LIM port size.

http://www.bonnevilleclub.com/forum/...=87854&start=0
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Old 11-03-2007, 04:46 PM   #14
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That'* absolute max and is based on cylinder head port size. Ideally, you want the LIM ports to 'neck down' gradually to SLIGHTLY LESS than heat port size. 1.9x.9 seems to be that magic number or very close to it. NEVER larger than the cylinder head port size.
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Old 11-03-2007, 09:12 PM   #15
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I possess a digital micrometer, so I am guaranteed not to screw it up lol. Ok... maybe no guarantees... but still. Yeah, I have a previous thread about LIMs with a small compilation of other threads that I'm using for references, and that'* one of them.
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Old 11-03-2007, 09:19 PM   #16
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Since I ported jr's3800'* LIM, nobody else that did the porting has complained a bit.

Even if you screw up a LITTLE, you'll still gain performance. Our goal is to make sure you get the most of it.
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Old 11-03-2007, 09:21 PM   #17
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Quote:
Originally Posted by willwren
Since I ported jr's3800'* LIM, nobody else that did the porting has complained a bit.

Even if you screw up a LITTLE, you'll still gain performance. Our goal is to make sure you get the most of it.
Alright... I might be getting a '95 LIM from agrazela. That'll be my LIM to mess with. I just don't want to be in a rush, cuz when I'm in a rush, I tend to forget things and royally screw things up lol.
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Old 11-04-2007, 12:55 AM   #18
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The LIMs are plentiful in the JYs in my area. I got mine for 35.00 and will have it pretty well cleaned up and ready to go when I do my gaskets in the spring. I thought it better to do that way rather than feel like I had to hurry once I pulled my current one out. :P
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Old 11-04-2007, 03:32 AM   #19
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Just a bit of advise, when your porting the runners, make sure that the finish is smooth, but not mirror like. This is an example ofthe finish that we put on out stuff.



This is an 2006 NASCAR SB2.2 Cylinder head ported by me. i know its not L36 pics, but the finish remains the same
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Old 11-04-2007, 10:43 AM   #20
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Very nice job! What sort of tool and bits did you use?
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