...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.

 

don't pay any attention to **** talkers like that--especially ones that can't even spell rotary... he's a noob

 

compete sarcasm. that work is unbelievable. if i had the finances i would love to acually join this forum. for now all i can do is watch and learn. maybe in about a year....

 

not a noob at all. i have built ROTARIES in the past few years myself. Like i said before though i am trying to get a new family off and running before i can get the expensive toy that i want. You guys have my greatest admirations and envy.

 

OMG!!!
i totally thought you were being serious.

touche'
LMAO

 

i totally feel like an *** now... but here's today's progress:

 

My apologies man, I didn't see the sarcasm :o Welcome to the forum

 

MemoryFab is showing $650 for their header. It looks like the Knight Sport design.

http://www.memoryfab.com/exhaust/car/?id=13

 

let's see if they'll give us one for the pj and i'll put it up on my website. yea...that'll happen

 

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

 

Actually... I noted the sarcasm.... although not well done...

 

my girl's been bitchin' at me lately.... i'm sensative

 

It took me about 13 read throughs to get it. I'm kinda slow...

 

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/

 

ill try to wet down my attempts at humor from know on Have you worked out a price for these port jobs yes junkie?

 

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.

 

You could call it breaking the ice for that purpose. I just seem to have fell in and got all wet in the process :D

 

Seriousness, bordering on A**Lretentiveness tends to be the default on this forum.

You will get a smile...it just takes longer :D

 

bk--
if you lived closer to me, i'd buy you a couple beers :D

 

Don't forget to put up a picture for a new avatar. :D

 

you got it.
i'll have to super-bling one of the ports and snap a pic of that one for you.

 

Dave, pm me your phone #

 

No kidding. Someone almost earned a forum violation for trolling / antagonizing (which may have ended in banning if we decided it was just a troll, esp. with such a low post number at the time). Luckily the "it's a joke" had already been posted...

 

porting.... Upfront I will say I have not ported a rotary engine yet. All my experience comes from porting two stroke race bikes (formula 2 yamaha's mostly).

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.

 

you are a braver soul than I to pull a motor from a good car before playing with a junkyard or crate motor