What kinds of run time can I get out of a 21-5, running it hard. And can you mod one for more mpg? if so how much$
Thanks Joe

I run a 2005 batch P5X with a standard plug and wanted to go up to 30% from 25%. It has what ever shims it came with from the factory my question is will it need reshimming and if so by how much? The engine has about 3 gallons through it tops.
Any help would be greatly appreciated.
Thanks

wadup playa'........I'm home.....call me

you could add a .10mm shim if it still has quite a bit of compression , if it is kind of soft and does not hold up to the flop test then leave shimming as is .
monty


imo

your phones off yo

WORD

How is the stock plus-4 shimmed? Is it ready for 30% out of the box?

ola amigo

,80mm , yes

Bro I think that Cobra Guy wants to Fajita in Your Pita

i am not the one who belongs in a mental institution johnny

I know........He is one of those funny Suckafoo's huh.....heheeeee

¿usted me envió un cojinete?

Rev

Thanks for the help monty but I have to ask what is the flop test
Thanks again

Does it means 0,8 mm clearance from TDC to the combustion chamber, or is it the total shim thickness?