Definitive Flow Figures for different Heads
Turbo Mini Forums

Here are some flow figures for some different heads, can you guys add to this.

From John Kimmins

BMW k1100 8v flow Figures

inlet valve 34mm dia, exh valve 30mm dia

peak inlet flow 132cfm
peak exh flow 92cfm



K1100 16v head in std "clean!" form gave:-

150cfm inlet
116cfm exh

these heads have 2 x 26mm inlets and 2 x 23.5 exhausts. The flow figures liven up dramatically when the throats are worked mildly and 3 angle seats used etc. Again a very good effort straight out of the box for the valve sizes. These heads in 8v and 16v form have long short turn radius lengths to them which appears to keep the air attached to the port longer before departing for the rear of the valve - giving good airflow figs for smallish valve sizes.



From Viz's yellow bible the just of the matter is a REALLY good full on 5 port head n/a with big offset valves etc will flow around

135cfm inlet
100-110 exh

Average Miglia Head - Figures from Jimbo

130cfm inlet
95 cfm exh

Bog Standard 12g940

90cfm inlet
70cfm exh

Team Racing

can we not have more accurate indepth figures ie,0.100,and 200 300 400 500 600 of lift, this will give a beter idea of what is going on,

you dont just bung a head on a flowbwnch and check flow at 0.500 lift,
we need a full picture,.

carl

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Intresting, like carl says but even then it gives me a rough indication or what mine is flowing.

Edited by Sam on 14th Mar, 2009.

theres the fiat punto 1243cc head ,stock is lowest ,and porting so far are the next 2 lines .tested at 28".

Edited by robert on 14th Mar, 2009.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

we definately need to know what pressure drop the tests were done with ,the results can then be corrected back to a standard pressure drop and compared .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Interesting stuff, as Robert says though we need the test pressure used.
I really need to get my flowbench working then i can test some of the heads i've done.

WWW.TURBO-MINI.COM

the 7 port will be coming out shortly to go on the new bottom end if any on wants to pop it on a flow bench.

Carl getting all technical..ooohhh come on then put a kad head up for scrutiny - I'll do the same with the K16v and stg 1 k16 when I'm not drunk!

JK

If Carling made Mini engines
it would probably be like this one!

The Mig head tests where done at 28"

Team Racing

JOhn, i tested a few heads a in the past, i thought i knoew where all the data was, unfortunatly it does not appear to be where i left it,

the heads i tested were,

my semi downdraught,its repalcement
for my twinnie front engine,

Nitrous head i did for Ian jonson,

John hastons MED nitrous head,
and yet another replacement heasd for my twinnie,

and also A laongman GT17, [stunning unlet flow]

i just cannot find them,AAAAhhhggg

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bugger ,shit and knob.
ive turned the garage upside down this morn and all i can find are figures for the semi downdraught and its repalcement,lots missing, i must have put them somewhere safe,lol

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Carl - you're meant to keep them on this computer thing!!

If Carling made Mini engines
it would probably be like this one!

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Just like your keys

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

No Mike,, the flow figures deffo didn't fall through a HOLE IN MY FOOKING POCKET,lol

On 15th Mar, 2009 MikeRace said:
Just like your keys

On 15th Mar, 2009 fastcarl said:

On 15th Mar, 2009 johnK said:
Carl - you're meant to keep them on this computer thing!!

if i'd have done that they would be history by now with my HD failure early last year,

i nkow ive moved them somewhere safe , just don'y know where,

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