My Rx3 Sp Coming Along.
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Senior Member
Joined: Jan 2002
Posts: 1,915
From: NJ USA
Originally Posted by bill shurvinton' date='Dec 5 2003, 04:14 PM
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
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
Senior Member
Joined: Dec 2003
Posts: 162
OK been to the garage and you're right it will open some 90BTDC so about the same as a small bridge (unless my sums are way out, as I don't have a dial guage on the junk engine I was using to visualise this).
Will be very interested to see what it puts out.
Will be very interested to see what it puts out.
to infinity & beyond, me
Joined: Aug 2001
Posts: 5,124
From: santurce
Originally Posted by treceb' date='Dec 5 2003, 01:41 AM
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?
Thread Starter
Senior Member
Joined: Jan 2002
Posts: 1,915
From: NJ USA
Originally Posted by treceb' date='Dec 5 2003, 06:41 AM
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?
Senior Member
Joined: Jan 2003
Posts: 267
From: Perth, Western Australia
My understanding is that Judge is going to be shoving that much air (i.e.boost) into the thing that the more avenues air has to get into the combustion chamber the better, regardless of plenum volumes, resonant tuning etc. Those factors come more into play with NA motors...
Judge, looks good and am looking forward to seeing some dyno results. C'mon!
Judge, looks good and am looking forward to seeing some dyno results. C'mon!
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Joined: Apr 2002
Posts: 2,930
From: IL
Originally Posted by andynogo' date='Dec 10 2003, 03:21 AM
My understanding is that Judge is going to be shoving that much air (i.e.boost) into the thing that the more avenues air has to get into the combustion chamber the better, regardless of plenum volumes, resonant tuning etc. Those factors come more into play with NA motors...
Judge, looks good and am looking forward to seeing some dyno results. C'mon!
Judge, looks good and am looking forward to seeing some dyno results. C'mon!
Senior Member
Joined: Jun 2003
Posts: 233
From: Columbus, Ga
We had a guy in alabama named tomas he had a blue rx-3 was suppose to be one off the fastest rotarys of that time. It would just eat up bb v8s all day long. Anyways thats a crazy motor and i love the way old school car looks . just wish i could come see it run 