MG N/A cam, kent 266 & swift tune SW5 timing figures!
Turbo Mini Forums

there have been a lot of threads on cams & more in particular the MG/ N/A cam well heres some timing figures for you to make you own mind up! gents

my moneys on the kent 266
i will add the avonbar phase 2 later

the MG Metro cam, as fitted to MK2 metro VDP's, RSP Mini coopers, Metro Gta'a and 1275 Metro Sports.
It Has a 1/4" groove machined into the cam after the number one lobe.
Checking height: 0.017" @ lobe

Timing: (Intake): 16/56 (Exhaust): 59/29

Nominal lobe lift: (Intake): 0.263" (Exhaust): 0.263"

Duration (Intake): 252 (Exhaust): 268

Lobe centre angle (Intake): 110 (Exhaust): 105

Lobe separation angle: 107.5

Lift on overlap: 0.054"



NEXT is the Kent 266 a nice all round road cam, these figures are based on kents own specs.

Checking height: 0.016" @ lobe

Timing: (Intake): 24/56 (Exhaust): 61/29

Nominal lobe lift: (Intake): 0.263" (Exhaust): 0.268"

Duration (Intake): 260 (Exhaust): 270

Lobe centre angle (Intake): 106 (Exhaust): 106

Lobe separation angle: 106

Lift on overlap: 0.054"



Swift tune SW5 road cam,

Checking height: 0.016" @ lobe

Timing: (Intake): 15/49 (Exhaust): 52/12

Nominal lobe lift: (Intake): 0.281" (Exhaust): 0.281"

Duration (Intake): 244 (Exhaust): 244

Lobe centre angle (Intake): 107 (Exhaust): 110

Lobe separation angle: 108.5

Lift on overlap: 0.036"


& last is the Avonbar Phase 2

checking hight inlet 0.012" Ex 0.014

Nominal lobe lift: (Intake): 0.360" (Exhaust): 0.400"

Duration (intake) 264 (Exhaust):280

Full lift at 108 deg

But piper says 110 deg on data sheet



you can see how Swift Tune! has given their cam a shade more lift and sacrificed the nominal lift & duration!

in an attempt to make a cam for emission purposes, i believe!

its well overated for a PERFORMANCE! cam IMO!

the cam in my next engine build is going to be a KENT 266

i honestly belive its just perfect for our turbo motors. & will make massive! torque & totall drivability.

this cam needs to be investigated further! ANYONE!

Edited by BENROSS on 14th Mar, 2006.

I like the design of the MG Cam with the extra exhaust duration, that is in my opinion what makes the A series work right, particularly on FI engines. You have a lot of gas so get the thing open quick, open high when you need it. Considering the port shapes and configuration, I'm surprised the SW5 is any good at all. It would be interesting to see whether it has a poly-harmonic profile. That might work. From what Mr Vizard said about forced induction, blowers prefer tighter LCA's which the SW-5 doesn't have. My present mini has a piper 270 which is 276-276 and not that much lift. I think the Kent 276 is shorter on the inlet, longer on the ex and has more lift on the exhaust, which is why it works better. In my opinion, the Avonbar Ph 2 cam is the ticket. but for a supercharger engine.

Bugger off, I'm getting there.

I have the kent 266 in my lastest build and was originally in my metro turbo before I rebuilt ready for the mini, as soon as it came on boost it was an animal serious torque!!!

yes my moneys on the kent 266 if you study the timing figures its just .... the bizz for a road going turbo motor

it just is

Ah good I have a kent 266, NA Metro and a SW5 in the shed somewhere. Whats the chances of that?!

Timing figures for MEDT3 cam sort of phase 2 and a halfish

Metro turbo weekend driver,Mini turbo in the making again!

One in a million shot but does anyone know the cam timing figures for an SW10?

EDIT: Much as it hurts me to say it I found the info on TMF, why do I feel dirty saying that?

http://www.theminiforum.co.uk/forums/index...showtopic=36988

Edited by Rob H on 31st Jan, 2009.

well i will post it here rob .................

Aftermarket Cams

First off is the excellent Swiftune SW5 road cam, these figures are based on my observations based on 2 new examples I measured about 2 years ago. The figures are to be read as average of the 2,

Checking height: 0.016" @ lobe

Timing: (Intake): 16/48 (Exhaust): 52/12

Nominal lobe lift: (Intake): 0.281" (Exhaust): 0.281"

Duration (Intake): 244 (Exhaust): 244

Lobe centre angle (Intake): 106 (Exhaust): 110

Lobe separation angle: 108

Lift on overlap: 0.036"

Accuracy: Good


The next in the Swiftune family is the SW10, which is basically a real hot road cam like a 286 but with better emissions and suited to road use where wear characteristics are more important than outright performance.

b]Checking height:[/b] 0.016" @ lobe

Timing: (Intake): 34/66 (Exhaust): 70/30

Nominal lobe lift: (Intake): 0.291" (Exhaust): 0.291"

Duration (Intake): 280 (Exhaust): 280

Lobe centre angle (Intake): 106 (Exhaust): 110

Lobe separation angle: 108

Lift on overlap: 0.070"

Accuracy: Good


Next is the much under used Kent 246 a nice all round road cam that has a little more bite than the SW5, these figures are based on kents own specs, plus with my own additions looking at 1 cam.

Checking height: 0.016" @ lobe

Timing: (Intake): 18/54 (Exhaust): 54/18

Nominal lobe lift: (Intake): 0.285" (Exhaust): 0.285"

Duration (Intake): 252 (Exhaust): 252

Lobe centre angle (Intake): 108 (Exhaust): 108

Lobe separation angle: 108

Lift on overlap: 0.048"

Accuracy: Good



Next is the Kent 266 a nice all round road cam, these figures are based on kents own specs, plus with my own additions.

Checking height: 0.016" @ lobe

Timing: (Intake): 24/56 (Exhaust): 61/29

Nominal lobe lift: (Intake): 0.263" (Exhaust): 0.268"

Duration (Intake): 260 (Exhaust): 270

Lobe centre angle (Intake): 106 (Exhaust): 106

Lobe separation angle: 106

Lift on overlap: 0.054"

Accuracy: Average



Here is the Kent 276;

Checking height: 0.016" @ lobe

Timing: (Intake): 29/61 (Exhaust): 66/34

Nominal lobe lift: (Intake): 0.293" (Exhaust): 0.315"

Duration (Intake): 270 (Exhaust): 280

Lobe centre angle (Intake): 106 (Exhaust): 106

Lobe separation angle: 106

Lift on overlap: 0.078"

Accuracy: Below Average



Here is the 286;

Checking height: 0.016" @ lobe

Timing: (Intake): 34/66 (Exhaust): 71/39

Nominal lobe lift: (Intake): 0.315" (Exhaust): 0.324"

Duration (Intake): 280 (Exhaust): 290

Lobe centre angle (Intake): 106 (Exhaust): 106

Lobe separation angle: 106

Lift on overlap: 0.088"

Accuracy: Below Average


The Kent 296;

Checking height: 0.016" @ lobe

Timing: (Intake): 39/71 (Exhaust): 76/44

Nominal lobe lift: (Intake): 0.324" (Exhaust): 0.340"

Duration (Intake): 290 (Exhaust): 300

Lobe centre angle (Intake): 106 (Exhaust): 106

Lobe separation angle: 106

Lift on overlap: 0.112"

Accuracy: Average



Kents Version of the good old 649;

Checking height: 0.016" @ lobe

Timing: (Intake): 43/64 (Exhaust): 61/40

Nominal lobe lift: (Intake): 0.323" (Exhaust): 0.323"

Duration (Intake): 287 (Exhaust): 281

Lobe centre angle (Intake): 100.5 (Exhaust): 100.5

Lobe separation angle: 100.5

Lift on overlap: 0.110"

Accuracy: Average



Piper's BP300. These figures are based soley on the average of 3 cylinders checked in my jig.


Checking height: 0.016" @ lobe

Timing: (Intake): 47/75 (Exhaust): 75/47

Nominal lobe lift: (Intake): 0.315" (Exhaust): 0.315"

Duration (Intake): 302 (Exhaust): 302

Lobe centre angle (Intake): 104 (Exhaust): 104

Lobe separation angle: 104

Lift on overlap: 0.125"

Accuracy: Good



The Morspeed phase 2 (Fast road) Based on 1 example only;

Checking height: 0.016" @ lobe

Timing: (Intake): 20/52 (Exhaust): 56/16

Nominal lobe lift: (Intake): 0.305" (Exhaust): 0.298"

Duration (Intake): 252 (Exhaust): 252

Lobe centre angle (Intake): 106 (Exhaust): 110

Lobe separation angle: 108

Lift on overlap: 0.048"

Accuracy: Good


The Morspeed phase 3 (trackday cam) Based on 1 example only;

Checking height: 0.016" @ lobe

Timing: (Intake): 27/63 (Exhaust): 63/27

Nominal lobe lift: (Intake): 0.315" (Exhaust): 0.311"

Duration (Intake): 270 (Exhaust): 270

Lobe centre angle (Intake): 108 (Exhaust): 108

Lobe separation angle: 108

Lift on overlap: 0.065"

Accuracy: Good



Keith Calvers (not his own I know) , RE13 Based on 1 example only;

Checking height: 0.016" @ lobe

Timing: (Intake): 34.5/61.5 (Exhaust): 63.5/32.5

Nominal lobe lift: (Intake): 0.290" (Exhaust): 0.290"

Duration (Intake): 276 (Exhaust): 276

Lobe centre angle (Intake): 103.5 (Exhaust): 105.5

Lobe separation angle: 104.5

Lift on overlap: 0.085"

Accuracy: Good



Ok, a little differnt this time, but a very good cam company none the less, this is a B646 from NEWMAN cams Based on 1 example only;

Checking height: 0.016" @ lobe

Timing: (Intake): 14/58 (Exhaust): 51/21

Nominal lobe lift: (Intake): 0.302" (Exhaust): 0.298"

Duration (Intake): 252 (Exhaust): 252

Lobe centre angle (Intake): 112 (Exhaust): 105

Lobe separation angle: 108.5

Lift on overlap: 0.047"

Accuracy: Good

Does anyone use the 266 CAM on a 998?

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Not as far as I know. But my current build will have one in (purely because I found one in my garage).

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

I'm in process of doing my stage2 with md266 on a 998.
I've put here cam profiles:
http://www.turbominis.co.uk/forums/index.p...id=262846&fr=30

Edited by alpa on 3rd Mar, 2010.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

ordered by 266 for my 998. I don't think it will be as good as the Vmax 265 but it should be much better than my std cam.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Does anyone have the timing figures for the Vmax 265 cam? I contacted Stuart Gurr a few weeks ago and he says he is no longer selling cams. Would be nice to know what cam profile he arrived at for supercharger use.

I dont pretend to know anything about cam design at all, but I am putting an MG Metro N/A cam in the present rebuild.I cant work out from the figures quoted how I should time it. I seem to remember that I should set it to maximum lift on the inlet valve at 108 degrees ATDC - any comments please ?

We have the van's MG cam at 108, seemed to work well.

I have a vmax cam. It has the timing scribed into the end along side the model number.

Then thats what I shall set it to - thanks Andy

Andy, have you tried the vmax cam?

Mines the 274, but I'm a long way from engine building at the moment unfortunately.

Me too, but its fun planning and collecting all the pieces!

Yep, ordering a big expensive bit tomorrow