the best 2.0 race motor to build...

[speedo]

....blood orange 76 targa numbered 710....live up near Nederland. I'll Pm you

[ErVikingo]

you got a pm speedo

[Joe Bob]

I have a 914 with an "S"(901/02) 2.0 motor in it....unfortunately I don't have the time to take it out....

[COLDBASS]

Originally posted by jluetjen
Just to try to argueing the point, this this 1968 Twin-Plugged T/R raced at Le Mans in 1971 and the Targa Florio in 1970.

Thanks for posting this...truly a work of art...

[nabilious]

Hey Mark, thanks for droppin those video clips in there, just awsome. Thats the sound that just haunts my dreams and those 914's lonk like fun to tangle with. For the first time I really appreciated the handling differences in the two models
Got any more vid's for a junky like me? or anybody else for that matter, where can I veiw more quality, in car footage like that
thanks again
Nabil

[ttweed]

Originally posted by klaucke
I agree about runing higher compression, but won't the twin plug also allow more advance? When detonation occurs you must retard timing; twin plugging helps prevent detonation, hence you can run more advance for more power (to generalize).

No, the reason you run more advance with a single, offset plug (like the 911 2-valve head has) is that it takes longer for the flame-front to spread in the combustion chamber. This is detrimental to power production and increases the chance of detonation. Read the reference link at Rennsport that I posted above:

"The high-domed pistons necessary for high compression ratios requires another spark plug to start another flame front on the other side of the piston dome.... This reduces the need for as much ignition advance to start and finish the combustion process when the piston reaches Top Dead Center. Since the spark event is starting closer to TDC in the compression cycle, there is less pressure from the beginning of ignition that is pushing 'back' down on the piston crown as the combustion event progresses. This lessens the 'negative' work done by the expanding gasses and allows all of the pressure building in the cylinder to push the piston in the correct direction, making the engine more efficient. "

"The offset-plug position on a 911 delays the combustion process. By installing two spark plugs per cylinder, you will increase the acceleration of the ignition sequence. This can reduce the required advance by 10 degrees or more thus lowering cylinder head temperatures."

TT

[Vintage911Racer]

Nabil,

No Problem on posting the videos. I am glad you liked them.

Go to VARA RACING and then click on the racing Videos Link on the left hand side after you enter the main page. All those videos are from inside my car.

Enjoy...

[nabilious]

Thanks Mark - there goes the next 2 hours of my life!
Nabil