Trots*88TII-AE*

iTrader: (11)

There's a big difference in size of your peripheral exhaust ports than with a semi-pp intake. I think that with the reni's side port exhaust combined with an earlier 13b peripheral exhaust port, you'll have too much area and exhaust velocity might suffer... An alternative could be to use the reni rotor housings, devcon it and make a semi-pp exhaust with a smaller exhaust port, or use cosmo housings with the smaller diffuser in the port. Only one way to find out! Cool project.

sen2two

iTrader: (10)

I thought about that, but thats why i am not going to do much porting at first. just polish the gsl-se exhausts, and clean up the renesis exhaust ports. because the sharp edges on the port are known to trap a lot of carbon. semi-pp has not been decided and is a looong way off. BP is also an option... an almost stock port motor is up first. wich i have mentioned a few times already...

And i have seen some pretty large semi-pp intakes with HUGE exhaust ports. if you go back a little, i mention my thoughts on "exhausting" the engine by creating a loss in vacuum power.

the stock ports are small enough on the gsl-se housings that it shouldnt be a problem though. also, adding a semi-pp to the exhaust of the renesis housings just will not work in my opinion. without machining a steel or very thick aluminum sleeve. Devcon just will not hold up to the heat of the exhaust. I looked for many different epoxys also when i first gave this thought. or actually when i was trying to bridgeport the exhaust ports on the renesis... im still looking for a way to do that, and it seems like filling in the areas by welding might work. its chances for success are low...

and your right, there is only one way to find out. i plan on trying ALL of my off the wall ideas. Just over time...

sen2two

iTrader: (10)

any thought on rotor choices anyone, my thoughts and observations are a few posts back on that...


So, while im still sorting the rotor choices in my head. Im moving onto something that is going to take some real thinking.Turning the 6 port Renesis plates into well working 4 port plates. seem easy when you think about it, but turns out...its not so cut and dry...

The main problem...

If you look at picture 3 and 4, you can see how far in the casting goes. or rather how thin the casting is where the ports are. picture 1 shows a not-so-exact measurement of how wide i can port and not either hit air(left) or water (right). the lower line, wich is basically right at the edge of the port shows i cant go any lower. cause i run the chance of hitting one of the emgine bolts, shown in picture 2. The top line represents about where the closing edge of my port face will be (this WILL change). Not the highest i can port.theres plenty of room to port up with the 6-ports being there. But if i do add a bridge or a semi-pp (or a mixture of the two!) having to large of a secondary port could kill the engines vacuum power. wich is a no no for all motor. all motor must keep a strong enough vacuum since no air is being force fed.atleast this is what i believe...


(now these pics here are just quick things i did in paint. they are not to scale. They are just visual references for those who understand better with pictures rather than words)


so, a few ideas... lets see what the opinions are.

Option 1. respect the boundries and have an oblong angled port opening.and fill in all the excess.
* I think it will be much to SMALL of a port and the angle will kill flow. I only made it an option to explore all possibilities and get the brain juices flowing



Option 2. Fill the coolant area (like with large brige ports or P. Ports on all other engines) and port into that area as needed.Port runner would be similar to older 13b 4-ports, and then fill in excess.
* as long as coolant will not leak in, i believe this is the best route to take



Option 3. Leave ports almost untouched, and only fill in the 6th port are to suit the port.
* would be VERY hard to make a nice runner for an intake manifold.hard but not impossible. and might have a lot of turbulance with the wierd shape...



Option 4. Leave it the hell alone and see how it does as a 6-port!









1.





2.





3.





4.

ultimatejay

iTrader: (1)

Fuel requirements for piston engines and rotary engines are totally different when it comes to N/A. I have researched E85 too and most of the guys that are making any kind of power gains are high compression piston engines. Our rotary engines are only at 9.7/10.0 and thus this high octane E85 fuel I don't think will work very well in an N/A motor. Have you found any data on E85 in a N/A rotary?

sen2two

iTrader: (10)

only here say and talk... i havnt confirmed anything just yet. Im not basing my want for E85 on talk though. Im basing it off how well NA rotarys perform with pure methanol.

Trots*88TII-AE*

iTrader: (11)

One explanation for why N/A piston guys do better with methanol could be the difference in dwell times (from Lynn Hanover on nopistons) http://www.nopistons.com/forums/Crac...l&fromsearch=1 piston engines have less time near tdc, and need to use more advance to get the charge burning at the right time and make the most power. In order to do that, they need higher octane gas with high compression pistons.

BDC

You'll have to use Renesis rotors if you want to use Renesis iron housings per the side seal groove difference between the newer and older rotors.

B

sen2two

iTrader: (10)

Kilo's NA cars run on methenol... The all motor rotary champ.

sen2two

iTrader: (10)

Can you elaborate further?

I have an idea what your getting at, but i want to be sure...

diabolical1

iTrader: (3)

these are the ideas i have in mind. if you can match the peripheral exhaust timing as closely to the stock side port exhaust timing, i think we'd be onto something. maybe form a sleeve out of stainless steel or something. i just don't know how far down on the rotor housing that would be and if it would cut the power stroke too short.

diabolical1

iTrader: (3)

Sen2two ~

as far as what to do about your 4-port versus 6-port dilemma, i think you should just leave the 6-ports alone for now. get everything setup first and if you want to start running more complex experiments down the line, then go for it.

also, just a thought, for your side seals, you'd have to use the coded side seals on the Renesis housing sides and the uncut (clearanced by you) side seals on the intermediate housing. pretty interesting, eh?

sen2two

iTrader: (10)

I am going to leave the 6 port a 6 port for now... I just have the gears in my head turning for future updates. i think using the renesis 4 port plates with a bridge might be better anyways...

and i didnt even think about using two different side seals for the different plates... thanks for pointing that out.

Liborek

Yes, Kilito even mentioned that his car runs better on methanol in other thread... but we don´t know how much. If I calculated correctly, there is net increase in released heat in same amount of air when burning methanol vs. gasoline..but only 4,5%. Then we have charge cooling etc...

But I don´t really know what are you aiming for... If you want All motor outright power, full PP is proved, if you want streetable engine with high torque like PP but low load driveability, PP intake and side exhaust seems to be very good combination.

Hyper4mance2k

iTrader: (40)

the runners on this engine were not long at all. they were typical PP runner legnth with a Weber IDA carb.

Drifting rex

iTrader: (17)

That is how i wanted to build my engine, but I didn't have the money for the renesis side irons. I wanted to put a peripheral port intake in the rotor housing as well too. You should most definitley build this engine!!!!!!