KA24DE flow characteristics

[DriftFasterThanGrip]

I've been looking for them for ever. I'm sure I've missed or overlooked something but does anyone have a link to flow charts for this engine's cylinder head?

And also has anyone used a GT35R or heard of anyone using one with a .63 a/r hot side. I am curious as to how this turbo would perform on my engine.

[hannibal]

NEver seen a flow chart for the KA head before.

I have heard of people running the GT35R. I cant remember if it was a KA (maybe an SR20 or RB25). Either way, you can get a good estimate of how it'll work by looking at the compressor map. IMO, You really dont need a flow chart for that (though it would obviously help).

[McAdam]

Ive tested a KA24DE head..... it flowed 110cfm @ 6 inches of water and .600" of lift. converting it to 25 inches of water will get you about 251cfm. I will eventually test at lower lifts and variable pressures, but this will at least get you an idea of the heads basic flowing abilities. Its nto bad for a stock head. there are a few places I could hit with a dremel and probably pick up a few CFM of flow with abot 15 mins of work. oh yeah, this was on the intake side.

McAdam

[IvanAtSPRacing]

My ported head with .5 mm oversize valves at 28"

Flow numbers are W/O and with the sheetmetal intake I built along with CFM increase and percentage increase with intake

.050" lift 55 / 58 3 cfm increase 5.5%.100" lift 103 / 103.6 .6 cfm increase .5%.150" lift 146 / 148 2 cfm increase 1.5%.200" lift 185 / 187.5 2.5 cfm increase 1.5%.250" lift 202 / 225 23 cfm increase 11.5%.300" lift 220 / 243 23 cfm increase 10.5%.350" lift 230 / 252 22 cfm increase 9.5%.400" lift 234 / 256.5 22.5 cfm increase 9.5%.450" lift 234 / 259 25 cfm increase 10.5%

The flow increase started to taper off at over .450" so it doesnt make much sense for lifts above that.

[DriftFasterThanGrip]

Thanks for the info Ivan!

So I could increase my volumetric efficiency by adding 1mm+ Ferrea valves, JWT cams and porting the head?