lizardsbba

titles kinda self explanatory. if so why or why not. and whats better or what should i do and can i do it myself like buy a template.

61620B

Lots of practice for both and good machinery.

Also need some good tools.

RETed

You can but why?

BP gives you advantages due to it's duration and early opening.
The PP gives you both with a LOT more.
Unless you're talking about a really tiny PP?


-Ted

lizardsbba

so i should just do a pp? were can i get a template for that and about how hard is it?

RETed

If you're asking how to do it...don't.


-Ted

ericgrau

iTrader: (1)

Most people do a street port or bridgeport because it's a lot easier. But a peripheral port makes more power than a bridgeport. A street port is still popular in spite of lower power because it doesn't have the practical problems that a bridgeport or peripheral port has. That's why it'd be nigh impossible to see a bridgeport or peripheral port in a factory car, whereas larger and larger "street ports" are coming with each new rotary model.

Black91n/a

Generally speaking, NO. A PP has tons of volume and timing already, you probably can't make use of any more from the side ports.

If it's for street use then don't PP. To get it quiet enough for street use you'll be severely choking it and it'll be way down on power. At that point you'll be making about as much as you would with a good bridge, where the bridge would be a lot cheaper.

Do yourself a favour and do a lot of research on both before doing anything about it.

t-von

iTrader: (8)

LOL You crack me up Ted.

Zero R

iTrader: (1)

There's a few people out there running combo bridge, P-Port's they must have some secret figured out

Black91n/a

Well there's a semi-PP, then there's a PP. With the semi it's just a very small peripheral port in addition to the side ports, not like a traditional full sized PP. You probably couldn't get a 13B to run, or at least not well with PP housings and bridgeported irons. You probably could never get enough exhaust port to match it.

diabolical1

iTrader: (3)

bingo! if you want to run a combination, you'll have to compromise on the size and timing of the peripherals. the main two reasons i see are both for the sake of getting the motor to run right and also, the gross complication of getting/making an intake manifold. however, getting appropriate exhaust, as mentioned earlier, will also become an issue if you're going to try to run full-sized peripherals with the side-ports still functioning.

diabolical1

iTrader: (3)

i agree with Ted.

t-von

iTrader: (8)

You must be talking about Judge ITO. He was running a full bridge and semi PP on his drag RX3 (I think). It was a straight runner set-up and made PP numbers to the rear wheels. The thread is over at Nopistons.

rotaryinspired

iTrader: (3)

He could be talking about people not on this board and who don't want to show off their set ups.

Zero R

iTrader: (1)

He is one yes, and to me a P-port is a P-port regardless of size. Combo-port, semi P-port, etc. are all backyard descriptions to a solution. As example, I would say ITO runs a combo-port, you would say he runs a bridge port and a semi p-port. Who is wrong here?

~S~

Black91n/a

Well there really needs to be a better description than just peripheral port in my oppinion, because that offers no information on the timing, positionning or size of the port. It'd be like calling all side ports simply side ports. Not very informative. See what I mean?

To me a PP means HUGE ports, and if they're something smaller and auxiliary there should be some sort of descriptive adjective associated with them to convey that information.

Zero R

iTrader: (1)

Here's a simple solution "I run small peripheral ports" there you go , trying to say timing should be included goes under the same argument as we've been having.

Combining a P-port and a side port would only make sense to be called a combination port or combi-port. You can't really have a semi p-port if you think about it. It either has a P-port or it doesn't.

~S~

t-von

iTrader: (8)

No one!

t-von

iTrader: (8)

Well if it were me, I would just call it a bridge PP engine or a half bridge pp engine. I think most in the rotary comunity would know exactly what I meant. If it had regular side ports, then I would just call it a side/pp engine.

That's just my opinion.

13B-RX3

iTrader: (2)

ultimatejay

iTrader: (1)

A p-port is an intake port directly in the side of the rotor housing- regardless of size and timing it's a p-port. A semi-pport is a combination of both the p-port and the normal side ports in the irons. Alot of the top dogs are running this combination because I think it gives the power good low and top end. Most I have seen have a reletively small p-port with a big bridgeport like the semi- p-port Allen posted above.

t-von

iTrader: (8)

^ Yep that's Judge ITO's work. I think someone in the 20b section maybe trying to duplicate that set-up.