port flows of 3sge BEAMS

[Celica RA45]

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]

for got to add this head flows more than a 1uz v 8 as edds heads were done in 28inches of water

[jeffro ra28]

any more information on the port work?

[Celica RA45]

the inlets were cleaned up only and the exhausts were opened up to flow about 70 % of the inlets

[ed]

ubfortunately mine wasnt flowed with any pipe or quasi manifold attached to the ports, so figures are 'ports only' of that make any sense. mark florrimal reckons add another 10% to the inlet and maybe 15% to the exhaust to the figures in the graph below to accout for this. smoke up my arse? maybe, i dunno.

otehrwise the anatomy of the ports in stock condition is very similar... so very impressive numbers glenn!

the 1uz vvti:

[ed]

ps numbers are great, but you know im going to want to see pics

[jeffro ra28]

iv got my non vvti heads in the process of porting now. Ill get some piccies out.
My standard port flowed 213 cfm. After a some port work i got 251 cfm at .500".
There is still alot of work to be done to the chamber and valve and valve seats, probably some more work to be done to the port floor aswell so hopefully i can gain some more, without going to much larger in cross sectional area.

[abently]

Can you guys post up the choke diameter on the Intake side ports ? As flow numbers are worthless without knowing exactly what size hole its flowing through.

[Billzilla]

Can you guys post up the choke diameter on the Intake side ports ? As flow numbers are worthless without knowing exactly what size hole its flowing through.

Exactly!

You could no doubt get even more flow, but the inlet velocity would be too slow and the engine would not work until very high revs.
Port flows by themselves don't mean a great deal.

[abently]

That's right. You can calculate it backwards what the port velocity is once you know the choke diameter and then see how the difference between the two ported heads corresponds on the dyno through the whole rpm range.

Also, in the future, have the Head reverse flowed to make better comparisons to others and their setups.

[Celica RA45]

if you call the inlet port on the head the choke its a oval port across is 53mm and vertical is 40mm
it then tapers to 2 x35mm valves

[gianttomato]

Just a cross link to the other thread with pics of new setup and dry sump arrangement.

http://www.toymods.net/forums/showpo...6&postcount=13

Carry on.

[abently]

if you call the inlet port on the head the choke its a oval port across is 53mm and vertical is 40mm
it then tapers to 2 x35mm valves

The choke point will be somewhere between the Valve seat and the beginning of the divider. Since the Valve diameters are 35mm, you'ld need a few cut-outs of 33-28mm discs to try and gauge the smallest diameter in the port. I can then tell you what the average Port speed is and what you should expect in terms of drivability.

[jeffro ra28]

Another simpler way to roughly estimate how good your porting is by measuring CC's before and after porting and comparing the percentage increase of both. Say, 5% increase in volume yeilds a 25% increase in flow etc.

Using this information and the rev range from a stock engine you can work out how well you are going

[jeffro ra28]

Also, the ultimate goal would be to acheive a port speed that is close to or greater then half the speed of sound. (edited my bad, err im a tool, i ment half the speed of sound)