<VV> What is squish?

[Joel McGregor]

Does anyone know why squish decreased detonation in 4 strokes and increases it in 2 strokes?  Is it because the symmetrical way a 2 stroke head is generally made causes everything to collide in the middle?
I know from experience that it's very easy to get too much squish velocity in a 2 stroke and have serious detonation problems.
Joel McGregor

-----Original Message-----
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of Matt Nall via VirtualVairs
Subject: Re: <VV> What is squish?

To add to what mark wrote.....which by the way is "Compression ratio".......


"Squish"  in a Corvair head with the STEP  in it...as do most  engines  versus an "open Chamber" [ in our case  Smog heads with domed pistons  and some early low hp engines ]


Is the distance between the "step"  and the top of the piston....... factory is usually approx. 0.080"


By  decreasing this to approx 0.040"   you  get less pinging......yet have higher compression!  win win!


Matt Nall
Charleston, Oregon