Other 7 port ??? 5 port ???

[iptamenos]

what is 7 port and 5 port any advice and pic !!!!

 

[GIL]

what is 7 port and 5 port any advice and pic !!!!

Don't forget about the 4 and 6 port cylinders. pm Big Kahuna. He can fill u in.

 

[wsuwrhr]

what is 7 port and 5 port any advice and pic !!!!

7 port cylinders are the older original design, what used to be a cast lamey. This cylinder is no longer cast but made of billet. Bore sizes are around 84-85 MM I think. Stroke from stock on up to 12MM stroker.

5 port cylinders are the newer design, made of billet also. Bore sizes are from 89-91MM. This cylinder can only be used with a 6MM(or bigger) stroker crank.

Any other questions?

Brian

 

[Roo]

7 port cylinders are the older original design, what used to be a cast lamey. This cylinder is no longer cast but made of billet. Bore sizes are around 84-85 MM I think. Stroke from stock on up to 12MM stroker.

5 port cylinders are the newer design, made of billet also. Bore sizes are from 89-91MM. This cylinder can only be used with a 6MM(or bigger)
stroker crank.

Any other questions?

Brian

Yes, why less ports with a bigger bore?

-Andrew

 

[wsuwrhr]

Yes, why less ports with a bigger bore?

-Andrew

Port volume.

 

[wsuwrhr]

 

[wsuwrhr]

Big stack are 5 port stroker cylinders, small stack on right are stock stroke 7 port cylinders, small stack on left are stock stroke Kawi cylinders and in the middle stack are stroker Kawis.

Brian

 

[restosud]

this is pure temptation porn and should be banned!:beerchug:
but that's just my opinion:Flush:
where's the religious right when you need it eh?

 

[wsuwrhr]

You are lucky I don't have a picture of the facade of DASA, or I would post it.

Brian

this is pure temptation porn and should be banned!:beerchug:
but that's just my opinion:Flush:
where's the religious right when you need it eh?

 

[SUPERTUNE]

To answer your question...
Cylinder configurations are referred as 5 port cylinder and 7 port cylinders.
The 5 port cylinder means it has 5 intake transfer ports feeding the intake charge into the top of cylinder from the lower crankcase.
A 7 port cylinder means it has 7 transfer ports feeding the intake charge into the top of cylinder from the lower crankcase.
The exhaust port is not counted as all cylinders have 1 exhaust port, and they can be referenced as unbridged or bridged port.
A stock Superjet/Waveblaster/Raider engine is a 5 port, while a GP800/GP1200R use a 7 port design and are a better modern configuration designed to make more power per cc.

X-METAL WORKS cylinders are freestyle bred and all use 7 port design in our engine sizes from as small as 735cc all the way up to 1040cc in a twin cylinder 62T/64X case based engine.

http://www.xmetalworks.com/

http://www.xmetalworks.com/products/1000cc+xscream+engine+package/9


* This was the engine Nac Floriancic won the 2008 Amatuer World Finals

http://www.xmetalworks.com/products/900cc+(862cc)+xscream+engine+package/25

1st attachment is the 900cc (862cc) engine.
2nd attachment is the 1000cc (992cc) engine.

 

[Idok]

couldnt resist :brap:

 

[iptamenos]

which is best for racing and freestyle ?

850 cc with 5 ports or with 7 ?

 

[SUPERTUNE]

Both designs have worked for both, it's all in the engine builders setup.
IMO, the 7 port is better all around modern technology for making more horsepower per cc.

 

[wsuwrhr]

which is best for racing and freestyle ?

850 cc with 5 ports or with 7 ?

With a shorter stroke and smaller CC, like a 5MM or less, in DASA's opinion, the 7 port is the better design.

Larger stroke, larger piston, a 5 port design will outperform the 7 port.

Brian