MD274 Cam Expectations
Turbo Mini Forums

When I got my cam the PH2 was like hens teeth so I ended up getting an MD274.

I dont understand all the figures so comparing them with other cam figures doesnt really help me :$ can somone use some plain english...

http://turbominis.co.uk/forums/attachments/123522-1.pdf

Power Band: 1000-6000
Cam lift in/ex: .285" / .281"
Valve lift in/ex: .348" / .343"
Duration in/ex: 248º / 274º
Timing: 12/56 69/25
Inlet timing full lift: 112º

Figures taken from here http://www.kentcams.com/info/catalogue_lowRes.pdf

Edited by Simon on 25th Jan, 2010.

http://turbominis.co.uk/forums/index.php?p=vt&tid=170151

Oh,

I guess I should add the rest of the engine spec.

1380cc
Morspeed "booster high flow 3" head (sorry benross, was before I knew about you!)
Non Adjustable Duplex
T3 Turbo
1.3 Roller rockers

Edited by Simon on 25th Jan, 2010.

http://turbominis.co.uk/forums/index.php?p=vt&tid=170151

I expected it to be a good turbo cam, that is why I included it in the graph.

The short answer is that it has a high lobe separation angle which means low overlap for a moderate duration. This should get the turbo spooled up quick, but not have a lot of boost lost at valve overlap. Lift is quite high.

Don't expect the same sort of performance as the PH2 as the duration is much lower.

But unless it is tested against other cams on the same engine, then this is supposition.

I don't think that you will be disappointed.

Edited by Paul S on 25th Jan, 2010.

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 S said it all realy, it will work well and pull very strongley low down

lets see what it produces on the rollers ?
i think you will be suprized

is this not the sports injection cam, i have one in my current spi lump

does turbo's not need turbo specific cams? (sorry to sound dumb im new to turbos) :)

rick, if you ever want to sell your 274i let me know :)

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

sorry but the whole engine along with all the spi components and loom is for sale not just the cam :S

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."

ah ok...

ill take it in im trying to learn as much as i can lol

I'm also interested in the MD274. I am planning to build either a 1293 or 1380 Jonspeed suckthrough setup.

Paul, a dumb question maybe, but what is the LSA for the MD274?

Would the MD274SP be of any benefit over the MD274 in a supercharged application?

The LSA on the MD274 is 112 degrees.

The 274SP however is on a 108/106 degree LSA, so, in my opinion, not so good for a turbo.

However for a supercharged engine, I think that the SP would be better as, firstly, it would reduce the charge robbing on the inlet valve overlap, secondly, the lower LSA would be OK.

You might be better off with something a bit more radical... depends what you want to use the car for.

Edited by Paul S on 17th Feb, 2011.

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."

Thanks Paul. The car is a 1980 Australian Leyland Moke and will be used for driving kids around and a bit of fun now and then. I would like it to be very tractable so that others can drive it on occasion. Are there any other cams you can suggest that would fit this bill?

Moke.... driving kids around....... leave it standard.

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. The reason you say that the MD274SP comes in second to the MD274, is that on account to the lower LSA?

If i have more toys than you when i die, I WIN

Yes, I had a long discussion with Kent about this a few months ago. They advised not to use the 274SP with a turbo because of the lower LSA.

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."

if you want a good all round cam go for the swift tune SW5 do you homework on this .............they do work well

thought i would tack onto this rather than start a new thread.

what rocker clearances should I have for this cam and 1.3 roller rockers?

http://turbominis.co.uk/forums/index.php?p=vt&tid=170151