Q-500 Racing Discuss AMA 428, AMA 424, and any other variants of Quickie 500 racing

Nelson LS Best Set up

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Old 08-03-2008, 10:25 AM
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dapan
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Default Nelson LS Best Set up

Hi
Did anyone know the best set up for this engine?

dapan
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Old 08-03-2008, 12:21 PM
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garys
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Default RE: Nelson LS Best Set up

The best way to start is how it arrives from Shadel. You may need to slightly adjust the head clearence, ect, for specific conditions on any given day, but there's not a "best set up" that works everywhere.
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Old 08-03-2008, 04:23 PM
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Default RE: Nelson LS Best Set up

Hi!
When I got my LS Q-500 engine from Dave Shadel I had to remove one of the head shims to have it run good.We use just 10% nitro over here in Sweden so it seems logical.
15% nitro use 2 shims.
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Old 08-04-2008, 08:49 AM
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daven
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Default RE: Nelson LS Best Set up

Quickie or Q40 motor??

For the quickie I've not been using a sleeve shim, and running the head between .010 - .015

For the Q40 motor I use a .003 under the sleeve and run the head between .015 - .020

It really varies from motor to motor, just keep playing with it untill you find something that works.
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Old 08-04-2008, 11:01 AM
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Ed Smith
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Default RE: Nelson LS Best Set up

I guess there has to be a starting point. The figures I got from Performance Specialties are as follows.

Deck height 0.193"

Head clearance 0.018"

However as Gary and Dave have stated, local conditions and fuel used may necessitate some adjustments.

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Old 08-04-2008, 11:07 AM
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dapan
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Default RE: Nelson LS Best Set up

hi and thanks for the answers
i am interesting to know for Q500 engine who runs 15% nitro not for Q40
Thanks again
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