280degree PMC CAM- Wot will this do ??

[Slatter]

280degree PMC CAM- Wot will this do ??

Where will it kick in, wot will it rev till??
Im running twin 40's and will be a stage 1 head..

I guess it will be a bit lumpy :lol:

Cheers
Slatter

[dan16v]

it means it will give you slightly more torque for 270degress out of the 360 the cam spins expect it will be from 2500rpm+ my old gte had a rally cam which cut in at 4000rpm it was a rite laff!

[Slatter]

so you means it lifts for 280 degrees

not 270

?????

CP Answer this please !

[dan16v]

sorry m8 thats wat i meant! 280deg basicaly your valves will stay open longer than std id personaly not put one on a road car u use every day its horrible sitting in traffic!

[dan16v]

at the end of the day all you want to know is the rAnge it uses! if you dont like to spank your engine with high rev fun get a mild cam that cuts in at 2500rpm if it s the one in the pmc ad it will be a soft cam not a all out lairy one!

[Jim]

Slatter, I think I have the same Cam in my car (Need CP to confirm this though). It allows you to Rev higher - way past 7000 :roll: :wink: It is lumpy, but whats the fun in having a smooth refined car? :wink: All you have to do is avoid traffic jams..I'm lucky as in Milton Keynes there hardly any Traffic lights, just 60mph roads and roundabouts 8)

Jim

[Slatter]

well my standard engine on 40's revs way past 7000

so looks like i will be haveing alot of fun ;)

[dan16v]

you may say slim jim, wheres the the fun in having a smooth refined car? my car is smooth and refined and fast, problem with cams is it can be alot like a turbo your always waiting to come into the power band and since ive had the valver i much prefere std cams with plenty of bhp over my madly cammed gte.

[mikeoxford]

what you got slatter? 1.4 or 1.3? i dont like to take mine over 7000 - but im gettin the kent ast2 cam and 40 setup soon so i guess ill have a play now and again :)

what revs does the 8v digi dash go off at i forgot??

[Austin_Nova16]

7000rpm, then it just flashes! :lol:

[CP]

Point number 1 - if you have a std Nova dial dash the rev meter will almost be certainly out. Mine indicated 500rpm higher with the 1.6 8v in as measured on a dyno.

Point 2. I'm not an expert on this but as i understand it, as has been said already the number of a cam usually refers to duration ie the period that the valves are open for measured in degrees representing 1 complete engine cycle. However its only part of the story, as there are different amounts of valve lift to contend with as well as different amounts of overlap ( the period when the inlet and exhaust valves are open together) The cam makers usually increase lift as the duration is increased. I'm not sure about overlap but I should imagine that its increased as well. Its all about getting as much air thru but has to take into account air flow characteristics and alsorts of other stuff like back pressure, pulsing effects and resonance - quite tricky really and the actual relationship between lift, duration and overlap is critical for ultimate performance.

As a basic guide major cam makers typically do:
1. 270 known as a fast road
2. 280(285) known as fast road/rally
3. 300 rally/race
4. 300+ race specials.

The effect that i have noticed is that the main power band appears to be moved up about 500 to a 1000 revs with maybe 500 or so revs added to the top of the range. (from270 to 280 cams) The engine will be less smooth lower down but is fine to drive round town. Low down response is worsened. You must be prepared to change gear to get the revs up and then you'll fly and you'll notice that instead of tailing off at the top the engine will keep pulling noticeably longer and stronger. I would say from my own experience that there is little point in putting in a high duration cam unless mods have been done to the head (unless its a totally brilliant 16v head already eg the 2.0XE )

[Jim]

Dan, the reason you have a fast smooth car on standard cams is because you have a bigger engine, I'm guessing you have a 2.0? For those of us with 1.4 and/or 1.6 engines, a cam is a means of getting more power from the smaller engine. I was only joking that a smooth car does not give you fun..chill dude :)

Like I said, if you have the opportunity to Rev the car higher than you normally would when driving around a 30mph town then a performance cam is a good idea, otherwise you'll have to make do with the lumpyness for inner city driving. It's one of those things when Modding your car, theres always a disadvantage to the advantage. :|

Jim

[dan16v]

i didnt mean it like that m8! seriously tho dont you ever drive round and think this is so annoying? at first i loved my cam coz i thought it was mad reving the guts out of my car but in the end i hated not being able to cruise along at 40 in 5th to do 40mph with the rally cam i had to be in 3rd! plus the fuel consumption was sooooo bad!

[Jim]

The only thing I don't like about the Cam is when the car first starts up in the mornings. Other than that it runs fine. I love driving my car, having the power to put your foot down is great :) The fuel consumption doesn't bother me all that much as I don't do many miles. A full tank usually lasts for 3-4 weeks. Even motorway driving isn't as bad as i thought. In fact I get even more mpg if I drive at a sensible speed.

Jim

[CP]

Where the fook did that green "thing" come from - I dont remember typing that lol! 2.0xe

[Jim]

LOL CP. If you click on View More Emotions when replying to a message theres a load more. The little green thing 0X is a combination of 0 + X

:)

Jim

[ollster]

280degree PMC CAM, slight OT but this cam is most lightly to be a piper 280 or a kent 280, most companies jus badge cams up as their own when really they are jus piper or kent items (e.g. courtenay). Also how much is it priced up at cos i can get a piper 270/ 280 etc for ?80, as these compaines normally rip you off? Might be useless information but this is what i have found.