Opinions on my P.port housings
11-02-2005, 05:56 AM
#1
Senior Member
Thread Starter
Join Date: Jun 2003
Location: Denmark
Posts: 214
Ok I have just about finished makin my own peripheral port housings.
I would like some opinions on anything that you can think of.
The exhaust port needs some more work, i just ran out of time the other day.
*Is the intake ok or does it need some work?
*is there any gains to be found if I open up the exhaust port upwards
*Any ideas or input is much appreciated
This is for an all out racemotor
I would like some opinions on anything that you can think of.
The exhaust port needs some more work, i just ran out of time the other day.
*Is the intake ok or does it need some work?
*is there any gains to be found if I open up the exhaust port upwards
*Any ideas or input is much appreciated
This is for an all out racemotor
11-02-2005, 08:39 AM
#3
Fabricator
Join Date: Jan 2004
Location: Central Ohio (Hebron) Zephyrhills Fla.
Posts: 1,322
Originally Posted by Kim' post='774753' date='Nov 2 2005, 03:56 AM
Ok I have just about finished makin my own peripheral port housings.
I would like some opinions on anything that you can think of.
The exhaust port needs some more work, i just ran out of time the other day.
*Is the intake ok or does it need some work?
*is there any gains to be found if I open up the exhaust port upwards
*Any ideas or input is much appreciated
This is for an all out racemotor
http://www.wankelkim.net/rx7/P-port
The pictures are so big I cannot make out any details. Can you put them into a file and zip it?
On the factory Pport (I have some) the exhaust is very close to street timing and is rather square looking with (what I feel) is rather sharp corners left all around the hole. Moving the top of the port up will kill off more of the bottom end of the range which is already pretty high up the range. You must have a rev limiter on both ignitions. The engine will exceed its mechanical limits before it quits making power even as an NA engine. You will like this engine. Your driveline will not like this engine.
Also, My version of MSPaint is so old it will not save pictures as JPGs. Does anyone know of some freeware that can do that. I have some flow bench stuff to publish.
Thanks.
Lynn E. Hanover
11-02-2005, 10:35 AM
#4
Senior Member
Join Date: Oct 2003
Location: Boston Ma.
Posts: 1,420
Originally Posted by Lynn E. Hanover' post='774782' date='Nov 2 2005, 09:39 AM
Also, My version of MSPaint is so old it will not save pictures as JPGs. Does anyone know of some freeware that can do that. I have some flow bench stuff to publish.
Thanks.
Lynn E. Hanover
If the link doesnt work, go to Downloads.com and search "paint" or "photo editing".
11-02-2005, 02:07 PM
#5
Junior Member
Join Date: Jan 2005
Location: Oxford, New Zealand
Posts: 18
Originally Posted by Lynn E. Hanover' post='774782' date='Nov 3 2005, 03:39 AM
Also, My version of MSPaint is so old it will not save pictures as JPGs. Does anyone know of some freeware that can do that. I have some flow bench stuff to publish.
Thanks.
Lynn E. Hanover
Hi Lynn, congrats on your 63rd :-)
Do a search for ifranview very usefull for resizing etc and
will allow you to view thumbnails of all images.
If you want a "Proper" graphics program search for GIMP for windows
excellent.
Both are free.
Regards
Michael
11-02-2005, 05:18 PM
#7
Senior Member
Thread Starter
Join Date: Jun 2003
Location: Denmark
Posts: 214
Originally Posted by Lynn E. Hanover' post='774782' date='Nov 2 2005, 05:39 PM
Your driveline will not like this engine.
Lynn E. Hanover
I have the MFR two piece driveshaft, what seems to be a stock LSD(4.875) and MFR gearbox.
The former owner told me that the only parts he ever broke was the shiftforks in the box, from what i can tell they are the stock forks, right. In that case they are pretty soft for racing application which is why I have a few spares which im contemplating having a friend replicate in titaniumor some other strong ****.
Is that worth it or will it just kill something else?
Once again thanks
-Kim
11-02-2005, 10:50 PM
#8
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Join Date: Jan 2004
Location: Central Ohio (Hebron) Zephyrhills Fla.
Posts: 1,322
Originally Posted by Kim' post='774753' date='Nov 2 2005, 03:56 AM
Ok I have just about finished makin my own peripheral port housings.
I would like some opinions on anything that you can think of.
The exhaust port needs some more work, i just ran out of time the other day.
*Is the intake ok or does it need some work?
*is there any gains to be found if I open up the exhaust port upwards
*Any ideas or input is much appreciated
This is for an all out racemotor
This could save your life. Stop what you are doing and ship that mill to my new shop in Hebron right away.
Its been recalled. Ship those beautifull housings along with it and forget rotary engines.
Ok, I lied about the recall.
Runner ID seems very large. It will step up on the "pipe" a long way up the RPM range. What is the ID at the port opening?
Lynn E. Hanover
11-02-2005, 10:52 PM
#9
Senior Member
Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Originally Posted by Lynn E. Hanover' post='774782' date='Nov 2 2005, 09:39 AM
The pictures are so big I cannot make out any details. Can you put them into a file and zip it?
On the factory Pport (I have some) the exhaust is very close to street timing and is rather square looking with (what I feel) is rather sharp corners left all around the hole. Moving the top of the port up will kill off more of the bottom end of the range which is already pretty high up the range. You must have a rev limiter on both ignitions. The engine will exceed its mechanical limits before it quits making power even as an NA engine. You will like this engine. Your driveline will not like this engine.
.
Lynn E. Hanover
Any suggestions for total ignition timing on a motor like this Lynn? My intake ports look exactly like these, though my exhaust is different. My FJO wideband doesn't want to work on this car, so I've only got EGT, and I'd like to get the ignition close before I start leaning it out to get the EGTs up.
11-02-2005, 11:59 PM
#10
Member
Join Date: Jun 2005
Posts: 49
Hey Lynn,
Can you explain what you mean by "long way up in the rpm range"? Port timing? I noticed one shot the ID looked really big, but the other end of the pipe (at the housing) looked "normal".
I also test drilled some housings last nite, my opening actually cut into that little bridge right below the oil injection port. Is that too high? What I'm shooting for is a little less overlap. BTW, this was just a test for my new drill press. My hole saw was too short and bottomed out before cutting all the way thru!
Owen
Can you explain what you mean by "long way up in the rpm range"? Port timing? I noticed one shot the ID looked really big, but the other end of the pipe (at the housing) looked "normal".
I also test drilled some housings last nite, my opening actually cut into that little bridge right below the oil injection port. Is that too high? What I'm shooting for is a little less overlap. BTW, this was just a test for my new drill press. My hole saw was too short and bottomed out before cutting all the way thru!
Owen