os .21 vg. shimming for 20%
08-17-2008, 03:13 PM
#1
os .21 vg. shimming for 20%
hello i got a used .21 vg that was run on 30% with one silver shim.i want to run it on 20% what do i need to do. remove or replaced the shim. on my brothers sts d21b its 0.3mm and 0.5mm for 30mm. would it be the same concept. thanks for any advice
08-19-2008, 07:38 PM
#2
does anyone use this engine that could help me out.
08-19-2008, 09:12 PM
#3
Good little engines! I have about 3 gallons thru mine right now. Still running strong!
It comes stock with one little shim. Ready to run with 20%. I think 30% is pushing it a little with this engine, but I run it anyway.
Run 20% the way it is!
They have good snap, good midrange (with a 053) and decent top end.
They also REALLY resond to some polishing and a little porting, but that's a whole other thread.
08-20-2008, 07:39 AM
#4
boostfiend is right, the engine is set up stock to run best with 20%. The stock plug should be an OS#8 and that is also optimum for 20%. If you go up to 30% you should consider a cooler plug, like an A5.
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