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· ex-Super *********
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1,704 Posts
Discussion Starter · #8 ·
Nice to see you here Mike S.

Thats too bad about the rod deal, I have found some other possible sorces so I guess I am all set with that. About the pistions, can you give us some specs/info. For example If I wanted to have pistons coated by Swain Tech will you offer the proper diameter piston to acount for the thickness of the coating, or would I be better off handing that with bore size?
 

· ex-Super *********
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1,704 Posts
Discussion Starter · #19 · (Edited)
In truth us adv. timing guys do NOT have increased compression ratio. You can not change compression ratio with out doin internal work to the motor ie. crank,rods,pistons,head. What us adv. timming guys have is higher cylinder pressuresor higher compression pressures. If you do a compression check before and after changing your timming you will get the same numbers(psi). The only time the psi changes(after timming adj.) is with the engine running. The whole point of advancing your timming is to start the "fire" sooner in the cyl. to increase the amount of psi that the "fire" or "burn" give you. This increased psi is what gives you the extra hp. Compression ratio is the difference between cyl. volume with the piston at BDC and the cyl. volume with the piston at TDC. There is no way timing can effect the formula for compresion ratio.
 
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