port flows of 3sge BEAMS

[abently]

This discussion is beyond what the Topic is about.

So long as people can post up their choke diameter, valve seat ID, Port volume, pictures of diffuser, distance of diffuser from Intake entry face and reverse Flow figures + dyno charts...... then can you start to get a good database of how it all compares and really push the development of these Heads.

Otherwise everyone is just repeating everybody elses work with no real-world data going back to the Head Porters and thus no true real push for max development of the Head within Factory design constraints.

[jeffro ra28]

This discussion is beyond what the Topic is about.

So long as people can post up their choke diameter, valve seat ID, Port volume, pictures of diffuser, distance of diffuser from Intake entry face and reverse Flow figures + dyno charts...... then can you start to get a good database of how it all compares and really push the development of these Heads.

Otherwise everyone is just repeating everybody elses work with no real-world data going back to the Head Porters and thus no true real push for max development of the Head within Factory design constraints.

True, we are still discussing a way to possibly develop these heads further, and some of it is actually coming first hand. Beleive it or not.

[jeffro ra28]

Lol, what is the topic BTW?
This is the thread starter.

this is my head off a altezza 3sge done in 25inches of water by hsd
inlet 1st
100 thou 200 thou 300 thou 400 thou 450 thou 500 thou 550 thou
cfm 79.79 157.8 218.3 263.1 276.5 285.1 291.9

exhaust 100 thou 200thou 300thou 400 thou 450 thou 500thou
cfm 69.01 133.1 171.8 190,1 195.9 201.3

this done with a 35mm inlet and 30mm exhaust valve. the valves are not touched only the ports were done

[Celica RA45]

choke is 30mm right where the valve guide is ,the defusser is 55mm from the out side of the head will check the valve seat after id after

[Celica RA45]

seat inside dia is 31.5 mm for inlet and exhaust is 27mm

[abently]

Thankyou Celica_RA45. Hopefully others from now on do the same and with some luck, you should be able to squeeze a bit more power out of the Head in a couple years time.

Multiplying the choke Area X 2, gives you an average flow of 133cfm/sq inch which is a bit down on velocity, say 10-12% but at more then Factory lift also. 150cfm/sq inch is about the max avg velocity possible, unless the port is very straight you can get away with a little more. Anyhow, see how it responds and maybe post up the dyno sheet when you eventually get one.

Since Honda patented the High-velocity Port 2 years ago, it would be intersting to see how Toyota change their next generation 3S-GE Cylinder Head ports and possibly follow that path.

This max avg port Velocity isn't an anecdotal number either, you go and Flow any recently designed Factory Head and you'll see its very consistent across all manufacturers. They themselves could make the port go sonic but they don't.

[Celica RA45]

inlet port is straight onto the back of the inlet valves ,there are pics in the 2stage injection set up in the tech section and im using 548 thou lift and 511 thou lift on exhaust

[abently]

Just see how it goes. Did you ever get to do a stock dyno run ? Or possibly find a Dyno shop which has dyno'd a few stock BEAM Engines and run your setup there then compare it.

One thing you can do if you find that the stock Head seems to of been better, is stroke the Engine as its the Piston which moves the air in and out of the Head so then the over-ported Head will respond more normal.

Eitherway, good on you for giving it a go.

[oldcorollas]

err.. have you been following glenns development?

[ed]

you seem to read a lot abelntly...

perhaps read a bit about when glenn's development over the past few YEARS on this single engine has entailed.

"perhaps just see how its goes" lol.... again

when you build an engine, or say, even find a functioning engine in aust that has a remotely comparable hp/L output as this... pipe up

TRD should be watching this engine, even they would learn something