[Land-speed] Compression Height, Ford Small Block, Of course...

[Rick Yacoucci]

I have found squish to have a profound effect on the engine need's for
octane


Thanks

Rick Yacoucci


-----Original Message-----
From: land-speed-bounces at autox.team.net
[mailto:land-speed-bounces at autox.team.net] On Behalf Of Rick Byrnes
Sent: Friday, March 18, 2011 7:19 AM
To: drmayf at mayfco.com; land-speed at autox.team.net
Subject: Re: [Land-speed] Compression Height, Ford Small Block, Of course...

Hi Doc
Most of my motors have had piston down in the bore at least .010".
A lifetime ago I built a turbo motor with .160"piston to deck, to get 
compression lower, and it ran just fine and made more power than I expected.

Speeds suggest around 400 HP from 2.5L.  While this is nothing by today's 
standards

My uneducated guess is that even with the smallish turbo I was using then, 
just created so much inlet turbulence that  the piston 
position/squish/quench became less important.

Now in later years the same engine with a properly designed piston with a 
large enough sump to get compression down to where I wanted, made lots more 
power, but many other parts had been changed as well.  Wayyyy more power.

So, I'm gonna say for a street engine of some unknown HP. down in the bore a

little (like .060") probably would be just fine........
go for it..........and have some fun 
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