Its nice to see an RX3 amongst all the rx7's - GO OLD SCHOOL! We had a local drag meet here in NZ last saturday - an ex Australian 13B turbo rx3 was running 9.66 1/4s in damp conditions with very little traction - the thing snaked up the track the whole way. I willbe intersted to hear what sort of times you get with the injection fitted .. its all turbos and 20B's down here in NZ

 

EMS is an Haltech E6K

 

the car looks good man good luck!!!!

 

if youre porting/polishing that much on the secondaries, wouldnt the secondary ports on a 6 port engine made into one make for a larger port?

 

Congrats on the Rx3, she looks very sweet and I hope you achieve what your looking for with it.

 

Hrrrm. Must admit to not seeing how this will work in practice. The combi port/ mini PP is set to open incredibly early then close just after BDC on the intake cycle, some 70 degrees before the side ports close.



Looking then at the runners to see how to fit this extra port into the resonant tuning modes, where the primary and secondary meet, there is enough of an area change to cause the reflection to occur there, making the effective primary runner length very short.



I need to go into the garage and stare at some engine bits to try and work it out



Bill

 

im sure u have a very valid point there. but how about giving an explanation in say, 4th grade english.

thanks



or maybe its just me.....

 

Bill

It sounds like your onto something. Do you think that the short duration of such a small P.Port may not justify the sacrfice in runner volume to the main primary's? Get back to us when you work out your theory. I curious how this "multi-port" setup will flow myself. It may work out good, by squeezing in more volume into a tighter timing curve. Either way it's definitely intriguing.

PK797 NYC

 

Nah, I'm sure it'll be fine.

 

4th grade: You blow on a bottle and it makes a note. A small bottle makes a high note, a large bottle makes a low note. This is the same principle as a tuned inlet.



Wrong sized bottle and you don't get the best.



As this is a complex case I need to think hard about which pulses will come where at what time.