RT on cam

[kingJimBob]

i donno?!?!?!

ok i hear ppl going on about valver coming on cam etc at certain revs.

im guessing this is the same with all cars?!?

if so what do ppl find the RT cuts in its (elastic band powered) Power?!?

mines normally 3K change at 4.5/5K +



prob wont get many replies, but worth a query.

 

[Daz]

Well, peak power on my 1.2 is about 3.5k..

On Cam, I believe, is on every car.. its just better than others..

 

[NaplesValver]

is it not when the second cam of atwin cam 16v starts workin too???

-->NV

 

[Lunner]

peak power in my 1.2 is almost dead on 4k

 

[steveyb]

power band starts at bout 4 - 4.5k on my valver

on twin cams aint one cam for inlet valves and the 2nd for zorst valves? as 16 valves would be a VERY tight fit on a single cam?

i heard something bout a cam kicking in on the honda Vtecs, dont they have 3 sets of cams or something??

 

[Southend 16v]

http://auto.howstuffworks.com/framed.htm?parent=question229.htm&url=http://www.leecao.com/honda/vtec/whatsvtec.htmlhttp://auto.howstuffworks.com/framed.htm?parent=question229.htm&url=http://www.leecao.com/honda/vtec/whatsvtec.html

 

[edde]

On cam is a just a point in the revs where the cams and engien efficience in getting air an fuel into the engine increases.

You can come on cam without VVT etc its just a point where the cams become more efficient.

 

[Zmaster2k]

yup bout 4k for me

 

[cliosportcraig]

Quote: Originally posted by NaplesValver on 18 June 2004


is it not when the second cam of atwin cam 16v starts workin too???

-->NV

No, both cams spin at the same rate all the time, they are both connected via the cam belt. On cam means when the peak powerband kicks in and you feel the effect of the cam profile

 

[FATBOY]

its all bollox to me!!!! all i know is the williams gets very fast at 4k revs!!!!!!!!!!

 

[Wezzie]

5k on my cup is where the torque is working hard and power isnt really noticable. under 5k it accelerates with certain force then over 5k it accelerates suprisingly more than youd expect but after 7000 rpm theres no point holding on.

 

[cliosportcraig]

Quote: Originally posted by FATBOY on 19 June 2004

its all bollox to me!!!! all i know is the williams gets very fast at 4k revs!!!!!!!!!!

lol

 

[Southend 16v]

my mini didnt really move till about 3500rpm, then just turned over the tarmac till 8000rpm!!!

 

[Matt16v]

Takes 16v engines a little longer to get to the optimum point for air/fuel to create the best power. They have 16 valves but are smaller than the valves on an 8v engine. IE when you open an 8v up is should be letting pretty much all of the air/fuel in imediatley. But the 8v runs out of puff earlier and cost it. Also the 16v is more efficiently timed.

All 16v are DOHC and use one for inlet and one for outlet, I believe you can have 2 different profile cams to do something, would assume one is to free up exhaust gasses more efficiently?

VVT I believe is to optimise low range power and top end power, IE keeps the delivery smooth at nearly any revs.

Williams should hit 85% of full power at 2,500 rpms so no need to wait for 4k!

 

[number2301]

My RT seems to come alive at about 3000, its supposed to be at peak at about 5000 but Ive never noticed anything there.

 

[182 sport]

You wont really notice anything in a normal 1.4 or 1.6 at any revs except that at 3.5k upwars ia better for over taking. But if you ever go in a valver/williams/172/182 the sound of the engine changes and there is instantly more power at your disposal

 

[edde]

Quote: Originally posted by Matt16v on 19 June 2004

Takes 16v engines a little longer to get to the optimum point for air/fuel to create the best power. They have 16 valves but are smaller than the valves on an 8v engine. IE when you open an 8v up is should be letting pretty much all of the air/fuel in imediatley. But the 8v runs out of puff earlier and cost it. Also the 16v is more efficiently timed.
All 16v are DOHC and use one for inlet and one for outlet, I believe you can have 2 different profile cams to do something, would assume one is to free up exhaust gasses more efficiently?

16V heads are better deigned for getting more fuel and air into and out of the piston so more power although there usually high up power engine rather than 8V ones.

16V engine dont have to be twin Cam although it does help produce more power but youd not notice much unless. Twin cams just mean that the cams are right above the valves so shouldnt move as much so at high revs keep with the intended power. The 1.2 Clio is a single cam 16V engine. Twin cams is just associated with high power although you could get almost as much power out of single cam engines and were talkin about higly tunned engines anyway.

 

[Matt16v]

Furry muff, I stand corrected!

Never seen a single camd valver engine!!