Twin-plug /4 motors...(pictures) Options

[Mueller]

This is a Type I head, but it'll give you an idea for the 914 /4 motors.

Paul Guard, of Guard Transmission (maker of bitch'n parts for Porsche transmissions)
loaned me this head to get an idea on how to twin-plug my motor.

The secondary plug is a 10mm motocycle plug.

A modified distributor cap from a Nissan 4 cyl truck engine is adapted to fit on the stock /4 distributor...the rotor is from Nissan as well. I have the drawings for this modification somewhere in my garage (IMG:style_emoticons/default/smile.gif)

Using an aftermarket distributorless ignition would be ideal, but for cost savings, the above will work.

There is a company that'll machine these heads for about 300 dollars or so (they do this for aircraft...not for performance, but for redundancy (saftey))

The sockets in the head are to give you an idea of the angles.

[Carrera916]

Hey Mueller,

Your idea isn't quite new as Porsche have done that with the 4 cammer engine (early Spyders & Carreras) and they were made to work right with other factors considered as piston dome shape, cylinder head combustion shape and flame proga...(can't spell the damn word, but the way the flame travels and ignite the fuel/air). The whole cylinder head & piston on these 4 cammers are more or less like the hemi design. I have grew up with these cars all my life and from one look at the picture of the type 1 head, I just felt it may not work well due to the design of the cylinder head combustion area. The timing of firing these two plugs on one cylinder on these 4 cammers beauty are a bit delayed (intentionally) and I could feel the difference when I shut down one or another. They ran two distributors with different timing setting (I think 15 deg. difference). If you want, I can look around for the close up picture of the 4 cam engine cylinder head to give you an idea....oh hell, i will look for it now and post it.

If you guys haven't see one of these beauty, you OUGHT to see it.... at least, HEAR her running....ohh man...goosebumps all over me now!!!

Try look into KAMMotors. com, they have sound effect stuff in their web! I haven't try it yet as I'm still hammering my frigging speakers to wake up ...sigh (IMG:style_emoticons/default/fighting19.gif)

However, Mueller, don't stop there....keep on trying and get in touch with me offline and I'd like to jump in to see what it can be done! (IMG:style_emoticons/default/clap56.gif)

jerry