What ever happend to Motivational Engineering's GA titanium rods and forged pistons? - Page 2

barnoun · Jul 17th, 2002, 01:03 PM

Quote:

Originally posted by James
...stock is 9.5 (unless you screwed with the timing which effectively changes the compression a bit)

You mean it would raise the compression?

James · Jul 17th, 2002, 01:04 PM

yeah slightly.

barnoun · Jul 17th, 2002, 01:36 PM

Guess us adv. timing guys have higher compression

PatScottAKA99XE · Jul 17th, 2002, 04:18 PM

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.

javierb14 · Jul 18th, 2002, 12:33 AM

what kind of material are the pistons and pins going to made out of? forged?

thanks

javier
www.maxrev.com