K11 Owners Group

Flying Duck

This guy claims much better mileage and better performance by cutting groovesin side the head.

Whoever authored the web page should be tied to a post and whipped for all of the bolding and underlining but the basic concept is that causing more turbulence at the top of the cylinder mixes the fuel and air better leading to inproved combustion.

Here's the horrid website:
http://somender-singh.com/

What say you?
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

owrstrich · Posted: Tue Jul 22, 2008 9:18 pm Post subject:

if that were the case then every racer from go karts to indy cars to drag cars
to stock cars would be doing it...

jo
_________________
yeeeeeehaaaaaaa...

rydor · Posted: Wed Jul 23, 2008 1:15 am Post subject:

Misread this... cut grooves in my head... not thinking any faster cuz my thoughts leak out now...

rover759 · Posted: Wed Jul 23, 2008 3:04 am Post subject:

I scan read this.............. Laughing

All I can say is the quoted example of a side valve engine is just daft you could probably improve one of them by farting in the air intake!!

SugarHillCTD · Posted: Wed Jul 23, 2008 6:35 am Post subject:

Snake oil. Smoke and mirrors. Without some sort of certified 3rd party testing, numbers can be manipulated to prove anything.

This guy probably thinks he invented the 200 mpg carburator also.

Kind of like that "Vortex" sheet metal P.O.S. that the Two Guys Garage now pushes. (That show used to be decent until they became a big Infomercial and brought in that head-banger dude.)

Was it P.T. Barnum (?) who was quoted as saying "there's a sucker born every minute"
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

max · Posted: Thu Jul 24, 2008 4:03 am Post subject:

Probably snake oil, but would depend on the engine - the cuts where there is a "squish zone" opposite the spark plug could be creating a pressure effect towards the electrodes/spark, **maybe** affecting the resulting flame-front BUT I'm definitely wondering

(a) what the original efficiency of the design was
(b) what the effect on the casting integrity under heat stress is
(c) have they factored-out the improvements from all the port-polishing and head skimming they're doing as part of the process?

Basically snake-oil if done outside the OEM design process... it's too specific to the engine.

Max

gpzoduibh · Posted: Thu Jul 24, 2008 12:53 pm Post subject:

I remember when Suzuki carried the logo of TSCC or twin swirl combustion chamber to give it its full and wonderful techno title !!
I suppose every mass produced cylinder head can be improved by polishing balancing and porting thats where the flow benches and tuners step in .
Regards
Bill Black
_________________
1995 Grinnall Scorpion III(1990 K100 16v motor)
2010 KTM 450 EXC
Moto Guzzi V50 powered hovercraft !
1989 K100RS (8V) special edition
1974 Yamaha DT360
1972 Sanglas 400 T
1980 Yamaha XS110-Watsonian Palma sidecar
1966 Bridgestone 175 dualtwin
1980 BMW R100RS
1979 Bultaco sherpa T 350
1979 Yamaha DT175MX
1990 Honda XR250R

duckbubbles · Posted: Thu Jul 24, 2008 7:59 pm Post subject:

I can see an improvement in an already inefficient head, like the flathead he talks about. Anything that promotes turbulence will improve efficiency. But the claimed gains are highly suspect in my view.

Frank
_________________
85 K100/1100RS, 321,000 miles, 25 years
96 Ducati 900SS/SP, sold it
05 R1200ST, 35,000 miles, 5 years
400,000 BMW miles

bmwtf · Posted: Mon Jul 28, 2008 1:34 am Post subject: grooved heads

About 25 years ago Jim Rowe at Metric Mechanic (BMW automobile tuner) did a lot of work with grooving intake manifolds to increase turbulence. He found that he was able to increase compression or lean the fuel/air mixture with increased turbulence. This was on engines with carburettors, I think fuel injection makes this less relevant.