hi compressions: wasDIY_EFI Digest V1 #258

[Mark Pitts]

Oops diagram didn't work... if anybody wants to see my idea... ill see =
if I can attach it to a mail again!

Mark


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From:  Mark Pitts[SMTP:saxon at zymurgy.org]
Sent:  Friday, September 06, 1996 1:52 PM
To:  'DIY EFI'; 'SRavet at bangate.compaq.com'
Subject:  RE: Re: hi compressions: wasDIY_EFI Digest V1 #258

You are better off with oval pistons, seeing as pistons cant turn, and =
makes the head a much better shape for fitting multi valves into , or =
just 2 big valves, but remember guys.... If you want revs as well =
(which, I don't think many of you Americans do... (cubes don't make =
revs)), you need small low mass valves so that they can close in time!

Here is a silly twin spark idea:
=20
If you get my drift (or for that matter....... My email works :))

Mark

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From:  SRavet at bangate.compaq.com[SMTP:SRavet at bangate.compaq.com]
Sent:  Friday, September 06, 1996 1:17 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  re: Re: hi compressions: wasDIY_EFI Digest V1 #258

Daniel Ridge <newt at cesdis1.gsfc.nasa.gov> Wrote:
| Todd's right about chamber shape and flame proopgation. Multivalves =
are a
| hack around the hard limits that geometry places on things -- we're
| constrained to have circular valves, it's tough to use real estate =
well
| when you are nesting circles(valves) in circles(cylinder(head)s). The
| multivalve people didn't want multivales -- they really wanted=20
rectangular
| valves :).

This might be a dumb question, but why not non-circular valves?  I guess =

they wouldn't be able to spin.  Is that a problem?  I can see corners =
being=20
bad, but what about a nice oval shape?

--steve

Steve Ravet
sravet at bangate.compaq.com
Baby you're a genius when it comes to cooking up some chili sauce...