Philip_SA

O yes

Something esle

it now starts very quick,

like new,

showing it is running in fine so far,

Philip

Philip_SA

regarding the intake and exhaust intake areas,

the amount of exhasu tarea which was gained with the earlier opening of the exhaust and better flowing, it was more than enough according to if compared to the intake

i think the area on exhaust port compared to intake shows less for exhaust anyway

i also have a more "open" exhaust helping to get the burnt gas out better as well

Philip

Nemesis8

iTrader: (3)

Thanks with the updates - especially about the water - you had us worried there a little.

Philip_SA

I was worried myself regarding the water leak, seams ok now

sen2two

i think rotaryheads.com offers bridge porting on the renesis...

r0tor

iTrader: (1)

i'm not sure thats the case anymore since the untimely death of guitarjunkie

Philip_SA

Sorry to hear about guitarjunkie.

I posted another clip on you tube:

http://www.youtube.com/watch?v=P_OU49LO8PE

according to me not as nice as the previous one, but to show the motor as well to show it is the renesis.

i promised i will post one, but will put another better quality one, when more light at the weekend (i am always back when a bit dark)

the "strange noise is the clutch, the full button clutch has also no sprung centre, so a bit tricky to drive, but i am getting there.

I took it to 6000rpm today (at times) nearly 700km on now, and yes, i can feel there is more power, not a kick all of sudden, but more and more when changing gears, response is better as well.

will send more the weekend

Philip

Brettus

iTrader: (2)

Yep - sounds like a bridport all right

what is that silvery thing around where the oil filler is ?

Philip_SA

the only thing i can think of there around isw the one stainless steel hose clamp, still want a neater one.

i replaced the standard vacuum hose to brake booster with blue silicon hose, and now have other hose clamps, the standard ones couldnt go as big to fit hose.

i did just under 900km today and took it tonight to about 8000rpm, and all i can say is


HORSES HORSES I LIKE HORSES

definately more power, cant wait to take to 9000rpm,

all feels better, torque power and espesially when i change gear, it is there quicker, better response.

I will post one more video the weekend, one which is in light and better sound of the bridgy

I still think we will get much more power with piggyback system (chip) or other ecu for management.like microtech or so,

i does run rich on idle it seems, and when tuned well we will get the best out

Philip

9krpmrx8

iTrader: (46)

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Nemesis8

iTrader: (3)

[embed]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/9Xs7b2ZUedo&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/9Xs7b2ZUedo&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/embed]

TeamRX8

iTrader: (25)

onefatsurfer

can we hear it revved a bit in your next vid? That sounds awesome...

Philip_SA

Hi

i will make some new vids with a rev, will post tomorrow


do you think opening the exhaust port earlier is a problem

there is more fuel coming in and earlier, it might rob some torque below, but surely right for mid to higher revs, it wasnt that much but does open earlier, the part we changed at the top of the exhaust port was very little, more to prevent the carbon of exhaust port (the buildup in sharp corner)

the exhaust port can do more volume quicly now, that was our main idea,

i did 1000miles now and took it to 9000rpm,

excellent, but yes it needs more tuning as i am sure it needs more fuel at the top, but it still has more power than std, or what it had as well.

when i change gear from 1st to second i feel it, it just picks up quicker.

i will make a longer video clip in car, but with lower resolution to get downloading faster, then you can hear it in action,

will make it soon!

before weekend

Philip

Spinning Sushi

iTrader: (21)

I can't wait to see the new vids.

Philip_SA

To give all an idea looking at the pics, as posted by team rx8

my bridge ports are the same as the j port, meaning the bridge itself is only as wide as on that pic,

then the width of the port itself is the same width as on the bridgeport picture,
but it doesnt go up as high and low, just to same hight as normal port at top and bottom, but the primary ports got the same treatment, but there the port itself was made a bit bigger (not too much due to restrictions in water jacket timing etc)

I hope it helps a bit


Philip

Philip_SA

just to set it a bit differant

the bridge itself is the same as the jport in picture, but the port itself the same width as the bridgeport picture.
the bridge still follows the same as the standard port shape.

will post more vids as soon as i can

one when revving and one when driving

Philip

BDC

I need to get my hands on a dead renesis iron and rotor housing pair for this. I have some ideas after talking with Chickenwafer Dave. Anybody willing to donate?

B

staticlag

Might want to post a WTB thread in the FS section

rotarygod

I have one! Of course I've already dissected the exhaust port to the extent that it can never run again. You just can't do much there. If you want to use a 13B iron to get an idea of how the bridge could be shaped, you can do this. You have to port a 13B housing opening so it opens MUCH earlier than you're used to. Rather than opening it at say 25* ATDC such as a RB streetport template, the Renesis ports open at 3* ATDC. This is one reason why the Renesis side seals are 2mm farther out than the 13B side seals. Also you need to be very careful about the apex seals. The Renesis seals are half the height so a bridge needs to be done very carefully to make sure that the sides of the apex seals are supported all the way across. If you use a 13B rotor as a template, it probably won't work! There is far more attention to detail needed in regards to bridging a Renesis. It scared me enough I didn't even try but kudos to those who do it and make it work.

Philip_SA

Yes RG,

i was also scared when i looked at the ports, but they assured me they tested it and the apex seal wasnt going anywhere, so i believed them,

they did tell me it took some time, well i waited more than 2 months for my 8 to be finished.

so far stil no problems, although the clutch is noisy, the brass button one with no spring centre. but it doesnt slip!

i know everyone wants dyno sheets, me too, but i first want to drive more to see if it does fuel more or less, to learn itself, as well as maybe adding other managemnt later but biggest obstacle at moment is cashflow

i promised more vids and i will tomorrow, friday, post ones with revving and driving, i promise

thanks guys

Philip

RX-8skater

ok i dont mean to be the dumbass of the thread but im trying to learn.... but what exactly is bridgeporting? it sounds badass like new cams but obviously thats not the case so if anyone could explain to mean that would be great with out being an ******* thanks

Philip_SA

here is picture of a normal bridgeport, we didnt go that far but it gives the idea

the name come from the bridge which is left for the corner seal to run on, otherwise it will fall into the port.

the main differance is of coarse more power, but the port start to open earlier giving it more time to suck in new mixture, thus more to burn.

but due to it opening earlier, you have a small part where the intake port (bridgeport part) which is open and the exhaust are not fully closed yet, thus loosing some mixture out exhaust, this gives it the brappy idle, it takes some power / torq from lower revs but not too much compared to peripheral port (totally differant) but good power increase in mid to high rev range and still drivable as well as not too much heavier on fuel, mine is actually stil fine when i drive normal with light foot and no high revving.

at the end it is the same as compared to other cam in piston (not as good as rotary) motor.

intake open earlier - more time for inflow of mixture, sucking in more,


at high revs the overlap of ports is so quick that it doesnt make a differance as much, no time for fuel mixture to escape, so that is also why more is won at higher revs, think of it as a 2 stroke bike, a GP race one, it works close the same, their porting are also a lot on the timing and revs as there isnt valves (ok reed valves, but some not) there timing was critical.

the rotax disk valve motor is actually more like rotary in idea of intake as a disk turns with hole in and when at intake port it sucks in new mixture, same as rotary, although that is still a piston motor. there you wil change the hole size for porting, the disk do the same job as a rotor in rotary which is opening and closing the ports, but rotary does the rest as well

I hope it helped

Philip

Nemesis8

iTrader: (3)

Philip - you still have not posted what your complete exhaust setup is.

RX-8skater

Thanks alot thAt mAkes since I cH now read through the thread and understand better