The Great Renesis Porting Project!
02-17-2005, 12:53 PM
#901
Kaiten Kenbu Rokuren
Originally Posted by burnoutking999
THAT PORTING JOB LOOKS LIKE S@#T. YOU SHOULD THROW THOSE AWAY AND START OVER. BY THE WAY WHICH CURB IS YOUR GARBAGE CAN LOCATED ON? 
02-17-2005, 12:56 PM
#902
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don't pay any attention to **** talkers like that--especially ones that can't even spell rotary... he's a noob
Last edited by guitarjunkie28; 02-17-2005 at 03:02 PM.
02-17-2005, 01:05 PM
#903
thats right...the KING!
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Originally Posted by Aoshi Shinomori
...thanks for your opinion. I hope this is a joke, if not then can you do better? I despise posts like these because all you're doing is ruining any chance of respect you'll get on the board. If you don't like the way he did the ports, why not suggest something rather than straight up insulting him? Thanks for playing.
02-17-2005, 01:10 PM
#904
thats right...the KING!
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Originally Posted by guitarjunkie28
don't pay any attention to **** talkers like that--especially ones that can't even spell rotary... he's a noob
02-17-2005, 03:24 PM
#908
Originally Posted by Aoshi Shinomori
Some have been made but none were better than heavy *** paperweights. They never made much power and the general consensus was that the exhaust ports were just bad. RE Amemiya makes one I think, Knight Sports has one. Search for aftermarket headers or something and you'll find a few threads. Oh, I think the Kinght Sports and RE Amemiya are both upwards of $1000 
http://www.memoryfab.com/exhaust/car/?id=13
02-17-2005, 03:38 PM
#910
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LOL i just talked to those guys on the phone. he originally said they made them, then he changed the story to say they ordered them. on top of that, he's the "technical advisor" and couldn't even tell me if the center runner is divided or not.
$600 is a lot of money for 4 hp
$600 is a lot of money for 4 hp
02-17-2005, 05:31 PM
#911
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Originally Posted by guitarjunkie28
OMG!!!
i totally thought you were being serious.
touche'
LMAO
i totally thought you were being serious.
touche'
LMAO
Last edited by Japan8; 02-18-2005 at 11:08 AM.
02-17-2005, 06:40 PM
#914
Originally Posted by guitarjunkie28
LOL i just talked to those guys on the phone. he originally said they made them, then he changed the story to say they ordered them. on top of that, he's the "technical advisor" and couldn't even tell me if the center runner is divided or not.
$600 is a lot of money for 4 hp
$600 is a lot of money for 4 hp
I agree, here is a link to all of them:
https://www.rx8club.com/showpost.php...3&postcount=40
from this thread:
https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/exhaust-header-knight-sports-up-11ps-33823/
02-18-2005, 06:52 AM
#915
thats right...the KING!
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Originally Posted by Snoochie
It took me about 13 read throughs to get it. I'm kinda slow...
Have you worked out a price for these port jobs yes junkie?
02-18-2005, 11:27 AM
#916
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yea, it takes soooooo much work to make these things right. i can do an rx7 motor in roughly a day, but the renesis is almost a day per iron...not quite, but you get the idea of how much it takes.
we're having a special on the website right now for the whole "package", but the porting alone will be somewhere between $400-600, depending on if the exhaust gets cut and re-welded or not. (small vs. large porting)
here's just part of what i took out of the secondary port... keep in mind the port shape is virtually the same as stock, so all this is coming from the runner.
^ speaking of which, i think the secondary runners may be flawed. they start out very small, and actually increase in size. i'm thinking this slows down the velocity of the air and may take away from the torque in the 4-6k range. what i did on this one was open up the runner and did my best to give it just a bit of a venturi effect towards the outlet... i may be wrong on this, but my "theory" is this will not only increase the flow (from very serious back cutting and short-turn radius work), but increase the velocity and help out with the torque in that area.
like i said, i'll admit when i'm wrong, but i think that may help. we'll test 'er out this time around.
and here's my buddies 20b i'm doing for him--just for fun. the ports need one final once-over for cleanliness, but they're about done.
i should have the final porting pics from the renesis later today or tomorrow.
we're having a special on the website right now for the whole "package", but the porting alone will be somewhere between $400-600, depending on if the exhaust gets cut and re-welded or not. (small vs. large porting)
here's just part of what i took out of the secondary port... keep in mind the port shape is virtually the same as stock, so all this is coming from the runner.
^ speaking of which, i think the secondary runners may be flawed. they start out very small, and actually increase in size. i'm thinking this slows down the velocity of the air and may take away from the torque in the 4-6k range. what i did on this one was open up the runner and did my best to give it just a bit of a venturi effect towards the outlet... i may be wrong on this, but my "theory" is this will not only increase the flow (from very serious back cutting and short-turn radius work), but increase the velocity and help out with the torque in that area.
like i said, i'll admit when i'm wrong, but i think that may help. we'll test 'er out this time around.
and here's my buddies 20b i'm doing for him--just for fun. the ports need one final once-over for cleanliness, but they're about done.
i should have the final porting pics from the renesis later today or tomorrow.
02-18-2005, 12:20 PM
#917
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Originally Posted by Charles R. Hill
Attempts at humor should be made well after people have had a chance to know you.
CRH
CRH
02-18-2005, 07:53 PM
#923
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Originally Posted by Charles R. Hill
Attempts at humor should be made well after people have had a chance to know you.
CRH
CRH
02-18-2005, 11:17 PM
#924
Gotta Love Two Strokes
Originally Posted by guitarjunkie28
thanks a lot for the input!!
a few things i'd like more clarification on though:
1) intake closing time. i can understand the adverse effect on a naturally aspirated engine, but i think it would help a turbocharged engine (once the turbo gets spoolin' anyway). in any reguard, i only extended them about 1mm of actual removal. the rest was just the bevel.
2) i'm unclear as to whether you're in favor of removing the sleeve from the intermediate housing. did you mean to remove it, and machine a new one that is fully divided? the runners are just tiny tiny...i'm wondering if it might help to just get rid of the center all together. (keep in mind it's only on this one turbocharged engine).
thanks again for the good advice. exactly the kind of constructive critisism i was hoping for. major props!!
a few things i'd like more clarification on though:
1) intake closing time. i can understand the adverse effect on a naturally aspirated engine, but i think it would help a turbocharged engine (once the turbo gets spoolin' anyway). in any reguard, i only extended them about 1mm of actual removal. the rest was just the bevel.
2) i'm unclear as to whether you're in favor of removing the sleeve from the intermediate housing. did you mean to remove it, and machine a new one that is fully divided? the runners are just tiny tiny...i'm wondering if it might help to just get rid of the center all together. (keep in mind it's only on this one turbocharged engine).
thanks again for the good advice. exactly the kind of constructive critisism i was hoping for. major props!!
That center port will have to remain divided or else you will get the exhaust pulse from one chamber exhaling pushing into the other chamber which will fill the other full of inert exhaust gas. it will raise compression and cause loss of power and possibly detonation all at the same time. Norton raced rotary motorcycles in the early 90's and they found that the rotary wants absolutly no backpressure in the exhaust. they even went to megaphone style exhaust to increase scavenging. reversionary expansion chambers were tried as well with no good effect.
Hence my waiting for a supercharger vs. a turbo charger.
if you could figure the gas volume per exhaust pulse and the duration, and build a header to use the exhaust gas velocity from one chamber to the nest to increase scavenging, you may be able to overcome the problem of the small exhaust ports.
intake closing time. Longer durations will work for abnormally aspirated engines, but they will reduce compression which will be good to effectivly reduce the compression ratio to prevent detonation under boost but they will kill any off boost bottom end. Hence another nod towards a supercharger vs. a turbo charger.
time to go visiting junkyards I think and get a rotary to play with.