[Amc-list] Swirl Port Heads/Pistons articles ... and Piston Groove Technology

[Greg Taylor <amundaza@xxxxxxxxx>]

Hey guys,
Regarding my cranking pressure question, I got some good feed on the AMC Forum that 217 PSI is the equivalent to 13.76:1 compression and that one guy’s 401 at 12:1 (220 PSI) did not like any sort of pump gas.  I am switching to a Crower cam (AMC Turbomaster) which has a 278-degree intake duration and 260-degree exhaust duration, which David @ Crower said would be great for a street/trail engine and would develop excellent low-end torque due to the shorter turbo exhaust profile.
 
So, in a quest to find better information that would correlate cranking pressure to octane ratings, I found a really good link in the Car Craft forums.  The link is to a website for a cylinder head & engine builder in Texas called EnDyn (Engine Dynamics).  On their main page, they show a Honda engine on the dyno that produces 137% VE.  They have been in business for years and were at one time a well-kept secret for a few NASCAR & NHRA teams in the early 1980’s (Bill Elliot and Bob Glidden).  Both teams were running engines developed by EnDyn that encorporated Swirl-Port designed heads AND pistons, which were what was giving them the edge in racing.  Aparently, the technology they came up with was allowing BSFC to be drastically reduced and power increased at the same time, all with a reduction in exhaust temps in their racing engines.
 
There are some good articles on their website www.theoldone.com in the ARTICLES SECTION, towards the bottom, from 3 different racing mags.  There is also a revised article, written in 1999, updating the subject some what and goes more into depth on what they have found to be the best cylinder head AND piston configurations.  This technology could well be applied to AMCs … by the way, one of their guys used to work for the Penske teams in the mid 1970’s … Hmm.
 
In light of the information in the swirl port articles at www.theoldone.com , I have a new theory on how the cylinder head groove technology works … it is an 2-part theory …
 
1)    That the head groove induces swirl on the compression up-stroke, helping to keep the fuel in atomized suspension
 

2)    That the head groove continues to induces swirl during the combustion event, swirling the flame front through the air/fuel mixture for better, more complete combustion.

Sincerely, 
Greg Taylor :) <>< 
Rochester Hills, MI
1989 Jeep Grand Wagoneer "TRMN8R2"

And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life. - 1 John 5:11-12



      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://splatter.wps.com/pipermail/amc-list/attachments/20081218/7ca21e2b/attachment.htm 
_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list