This article is particulaly interesting if you are thinking of stroking an engine. But is also gives insight into the effects of stroke and rod length on breathing and power.
http://victorylibrary.com/mopar/rod-tech-c.htm
I'm still researching it Barc. With JR's excellent post,(I really appreciate that JR), I know that the performance aftermarket is 'catering' to flex fuel alcohol based fuels by offering E-85 ready carburetors like Pro-Max has done and Quick Fuel among others. The timing and EGT parameters could be 'easily' controlled by a fuel injection system, which I may/may not do according to the expense. I still have a lot of leeway left because this winter/spring will concentrate on the shortblock, then when funds allow, the heads and valvetrain, followed by induction/ignition. If money was no object it would get a F.I. system without hesitation! I like that MegaSquirtII Microprocessor! It can control all parameters and is only 85.00,(Upgrade over the CPU), I might have to e-mail them and see what additional data they can provide.fal308 wrote:Will you be able to build to optimum performance for both fuels? I wonder if E85 has the same timing curve and fuel curve as gas? What with the computers in vehicles nowadays you never know exactly what they're controlling. I should imagine there's a sensor that can tell whether gas or E85 is being burned and adjust accordingly, if needed.
Another thing is that E85 would probably need a bigger fuel line, pump etc to make the same power comparable to gas due to it's less than optimal burn. You'd need more E85 to reach gas power. Don't forget also the other ethanol blends that are coming out (E20)
That race sounds like a blast! Too bad we dont all live closer. A running Nissan or other Asian type car maybe a Neon would be keen. 50.00 entry if no liscense. We could recruit Dave to drive the beast, Wayne and us as crew! Christer to do the specs, Jack T and Barry to de-code the damn thing and predict when we die or crash, Jr to tell us we are doing it all wrong, Jon does the paperwork and tech, Danny puts in his 2 cents, Rick saves our butts, Ian sends us rare unobtainable parts, David gives us some beer money, Botari 123 and Pat on medical trauma standby, Jimiboy laughs at us all, (Yeah I'm bored 6" of snow 45 mph winds 12 degrees F) (you could lose your car to be ceremoniously destroyed at anytime and probably will!)fal308 wrote:Yeah the Megasquirt is great. A couple of guys on my RX-7 board have built Megasquirt systems and they love them. http://www.bgsoflex.com/megasquirt.htmlis the Megasquirt website. FAQ-http://www.megasquirt.info/index.html
A couple other sites that may be of interest (though they are RX-7 leaning) for engine management;
http://www.microtechefi.com/
http://www.racetep.com/haltech.html
http://www.autronic.com/index.html
And completely unrelated but sounds like a blast;
http://www.24hoursoflemons.com/