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

Dave Dahlgren dahlgren536 at comcast.net
Fri Mar 18 07:35:33 MST 2011


It is just as easy to do right though..
Dave
----- Original Message ----- 
From: "Rick Byrnes" <Rick at RBMotorsports.com>
To: <drmayf at mayfco.com>; <land-speed at autox.team.net>
Sent: Friday, March 18, 2011 10:18 AM
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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