why is it that the zvh doesn't rev as well as a 1.6 cvh??

If you got 250bhp on a zvh and 250bhp on a cvh would the cvh be quicker? just looking at options for project lol

 

i dont jnow where people get this from my bro has a zvh and he has no probs with it reving as good as the old cvh that was in it

 

yeah this is why i am asking because I don't understand why it would rev worse?

just hear it all the time from people on here!

 

i've tried to find this out but everytime i ask on a thread on here noone is willing to explain it's either an urban myth or people have no idea what they are commenting on or are to bastard lazy to explain their opinion. so people settle this once and for all cos some of us on here are not privvy to the same info.

 

The geometry is better on the CVH with a longer rod and shorter stroke in comparison with the bore size.

 

This is the reason why.

The ZVH will produce the power but then start to tail off higher up the rev range where as the CVH will still make power higher up.

 

Isn't this strange because the Zetec is a fairly revvy engine. (in fact more revvy than a n/a CVH...)

My ZVH will go upto 5k no problem, didn't try much more as I want to keep it in one piece......

 

At the moment I run my 1.6 cvh to 6450rpm if a zvh will go to that and hold power till then I will prob go this route??

 

Have a look at this graph



2.1 ZVH

The power is at the wheels BTW

 

Thats holding power well at the top! Whats your spec??

 

And this 2.0 ZVH



Both seem to rev well and make awesome power ATW

 

PM

wul young

Its his car

 

i never had any trouble with mine in six years

 

Ah not your cars? Do you know the engine spec on these?

 

ive heard this urbun myth a lot to,never had no probs with mine,the harder you rev it the stronger the pull,dont need to rev it past 6k anyway,
another thing thats not been mentioned is the torque,2.0 is much torquer than cvh,and thats what you want,and i built the engine in my car approx 6 years ago now,and believe me its not had an easy life!
and it just keeps doin the numbers.
zvh or 16v zetec is the only way to go for big power,on uncrazy boost,and still retaining good reliability.i think i have shown that over the years,to myself if knowone else.

 

i built a 1.8 zvh xr2tt, and that pulled to 6500 as good as my 1.6 cvh xr2tt.


And that was just a rebuilt 1.8 zetec bottom end, and xr2i rebuilt head.
No mod's, just fresh.
My cvh, is balanced, flowed head.

 

my 2.0 ZVH won't rev verry high...

can't understand why some will rev higher then others...

6000 rpm is the max on mine, when boost comes in it flies to just over 5000 then goes slower to 6k and then it's all over so any suggestions whould be appreciated