K1200rs head flow figures for WAVE model
Turbo Mini Forums

I'm currently trying to validate a plenum design for my k1200 conversion using Ricardo WAVE.

The snag I have is that work won't let me use their flow bench to obtain my own discharge coefficients. Has anyone got any flow/lift curve data for an exhaust and inlet port of one of these heads?

Any help would be much appreciated becuase right now i've got nothing.

Cheers
Andy

I've got discharge coefficient vs lift data for a 12G940 and a 12G295 that I derived from published flow bench data. Not exactly what you are looking for but I can tell you that they do not vary a great deal.

If you can't get the K1200 data then you could at least use a generic curve with the actual valve throat sizes.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Paul, could you PM me that data that you have? Or post it on here, whichever you prefer? At least I can get a base model constructed and validated against dyno data that I have.

Cheers

This is the data for a standard port Pierce 5-port head, 35.7mm inlet 29mm exhaust valves.

http://www.starchak.ca/tech/8-port.htm

My software uses Length/Dia. ratios against coefficients:



I would be very interested in the results, particularly with regard to variations in runner length.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Cheers for that, I'll keep you posted with any updates!

I'll have a look . Do you have any flow figures? Otherwise I should have a more or less generic pent roof 16v head cd map that seems to work well for predicting power and torque for a 16v k conversion. i'm working designing a dual tuned plenum to shift the powerband of the 16 v head on paper it looks good

Edited by Sir Yun on 26th Nov, 2012.

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

Team Racing

its pretty simple actually: tuned intakes on the bmw itb's going into a small plenum (1380cc) with a sort of megaphone intake pipe to tune the low low end. Simulated I get about 150 nm at 2000 rpm near flat at 140 nm to about 5000, so lots of midrange and low end power . gives up around 10 bhp at the very top end but as it looks now it is worth it as it is a road engine. maybe variable intake would solve that. Exhaust is a 4 in 1 with a merge collector and muffler .
it is just simulated for now and it will be a b!tch to fold it under the bonnet.

Edited by Sir Yun on 27th Nov, 2012.

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

http://www.ecos2012.unipg.it/public/procee...cos2012_181.pdf

look at fig 5.

for cd of a rsv 1000 and a ducati 999 .. that should be near enough for starters

Edited by Sir Yun on 27th Nov, 2012.

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/