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Ken Elder 7 Port Head with pictures
https://www.ausmini.com/forums/viewtopic.php?f=2&t=54673		 Page 12 of 13
Author:  sgc [ Fri Sep 04, 2009 7:52 pm ]
Post subject: 
drmini in aust wrote:
He's talking about it relative to a 5 port- there's no charge robbing in the inlet ports so you can perhaps use more agressive duration and overlap.


Yep, you're right.. I was thinking 7 port vs 5 port eliminates the siamesed exhaust, which should make little difference to cam timing. One intake port per cylinder though means less compromises should be necessary in the cam department, each cylinder can be optimally timed without need to worry about charge robbing.

Resonance tuning of the intakes should be much more beneficial too for that matter 8)
Author:  GR [ Fri Sep 04, 2009 8:17 pm ]
Post subject: 
Hi Dave
The cams are coming along very well,iuse the same profiles for
the 5port and the 7 port-8 port the one ive designed for the road
cam for the 7 port is 286 duration .310 lift at the lobe but once
again this cam is rather radical but if you dont think out side the
circle you dont get any where, if you use the same as every body
else youl only make the same power as every body else and
thats not me, i have a KAD motor to beat, then i have a bigger
one again which is 290- 296 duration .330 lift at the lobe but will
need a bigger lifter .875 dia this one i will try in my j car as well
GRaham Russell
Author:  Fat Boy Dave [ Sat Sep 05, 2009 12:04 am ]
Post subject: 
Hmm, yep saw that KAD youtube vid. Looks impressive, not exactly a stock standard 1360 block and bottom end. I'm all for big numbers but how usable for an everyday road car are some of these engines, I mean the KAD had a very impresive torque curve, but what happens between idle and 2500 rpm?
Author:  kuzzy [ Sat Sep 05, 2009 9:27 pm ]
Post subject: 
Nb race car idle is 2200RPM. :twisted:

Any less and - stall :roll:
Author:  minicranks [ Thu Oct 22, 2009 8:12 pm ]
Post subject: 
who and how would you go about getting one of these for a race car.
graham woul you have to do more work to make it work with one of your race cams.
if so you had better contact me as i can run a 7 port head over the 5 port one you have been doing for me for the past while.
jai
Author:  GR [ Thu Oct 22, 2009 8:49 pm ]
Post subject: 
HI Dave
A lot of people have sent me links to the KAD youtube site, but that does not prove a thing, any boby can stick a vidio camera down the throat of a carbie or throttle body while it's making a lot of noise and say
it;s making x amount of HP, what about showing the torque scale and tacho at the same time as i will do with the 7 port so you can see what it's really making,and it's not far away now, still doing some more cam development had a couple of failures but you can't help bad luck,
just makes you more determine to get it right next time
Graham Russell.
HI Jai
Will phone you
Graham
Author:  graham in aus [ Fri Jan 29, 2010 11:33 pm ]
Post subject: 
Gauntlet laid down?

http://www.youtube.com/watch?v=KyIlx-cY ... mid=250646

Any news :?
Author:  norton [ Sat Jan 30, 2010 9:45 am ]
Post subject: 
graham in aus wrote:
Gauntlet laid down?

http://www.youtube.com/watch?v=KyIlx-cY ... mid=250646

Any news :?


I see it has CALVER RE13 camshaft
Author:  drmini in aust [ Sat Jan 30, 2010 10:48 am ]
Post subject: 
norton wrote:
graham in aus wrote:
Gauntlet laid down?

http://www.youtube.com/watch?v=KyIlx-cY ... mid=250646

Any news :?


I see it has CALVER RE13 camshaft

Which is just a Russell Engineering RE13 ground under licence in UK by Piper Cams.
Motor sounds good, but I thought its torque and HP would be higher.
Author:  Boostedmini [ Sat Jan 30, 2010 11:34 am ]
Post subject: 
its not bad, but i have seen some GR street motors make more.

Kev, is yours putting out s simmilar if not higher figure these days? how long has it been since yours was on the engine dyno?

Grant
Author:  Gareth_1330 [ Sat Jan 30, 2010 12:33 pm ]
Post subject: 
how do you get BHP on a chassis dyno? i assume its just HP at the crank? What conversion factor are they using to get bhp otherwise?

mine made 120hp, 100ft/lb, and i think the torque was higher at lower RPM in the rev range

thats a 5 port head with a redline/warner manifold!

built by GR naturally 8)
Author:  Boostedmini [ Sat Jan 30, 2010 2:43 pm ]
Post subject: 
there has always been talk about BHP being at the wheels and HP at the crank, i just believe it is peoples choice to say hp or bhp.

i think you just specify hp or bhp at the wheels or at the crank and if the engine is on an engine dyno then its at the crank.
Author:  Gareth_1330 [ Sat Jan 30, 2010 2:46 pm ]
Post subject: 
i have previously noticed the brits use the BHP terminology. Wikipedia had sme food for thought

Brake horsepower

Brake horsepower (bhp) is the measure of an engine's horsepower without the loss in power caused by the gearbox, alternator, differential, water pump, and other auxiliary components such as power steering pump, muffled exhaust system, etc. Brake refers to a device which was used to load an engine and hold it at a desired RPM. During testing, the output torque and rotational speed were measured to determine the brake horsepower. Horsepower was originally measured and calculated by use of the indicator (a James Watt invention of the late 18th century), and later by means of a De Prony brake connected to the engine's output shaft. More recently, an engine dynamometer is used instead of a De Prony brake. The output delivered to the driving wheels is less than that obtainable at the engine's crankshaft.
[edit] British horsepower

The acronym bhp may also be used for British horsepower, which has the same definition as the American SAE gross brake horsepower: 33,000 lb·ft/min. More information on American SAE horsepower measurements is below.
Author:  drmini in aust [ Sat Jan 30, 2010 3:19 pm ]
Post subject: 
Boostedmini wrote:
its not bad, but i have seen some GR street motors make more.

Kev, is yours putting out s similar if not higher figure these days? how long has it been since yours was on the engine dyno?

Grant

Not ever had my 1360 on Graham's engine dyno, but the 1412 made 113lb/ft torque and 113.6HP there (with single HS6 and RE13 cam).
HP would be higher if it had GR head work (it is a 12G1316, Vizarded by me).

When we say `HP' we mean BHP, whether at crank or wheels.

It's not the old British RAC rated HP (bore² x no of cyls)/2.5 used for registration purposes.
No wonder British engines had long strokes... :lol:
Author:  TheMiniMan [ Sat Jan 30, 2010 5:20 pm ]
Post subject: 
BHP is a measure of the brake against the turning power,,, whether it be an engine brake or a wheel brake or a rolling drum brake,,, it`s still a "brake" HP figure,,, the difference is that the wheel brake or rolling drum brake will have the drive train losses involved, where as the engine brake is just the engine with no drive train losses so those figures are allways inevitably higher than a chassis or wheel brake
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