martinmilne

wat are peoples prefrences on engines now are zvh's out of fashion ?or are people just not bothering with them is it either strong cvh or zetec turbo now

dandannydandan

iTrader: (2)

I'm personaly too new to these to comment but I will be interested to here what people say as I am just swapping a 2.1 ZVH for a high specced CVH. I've seen some CVH's with some bloody high power outputs though. Isn't the white APT ERST a CVH?

12_Second_rst

iTrader: (1)

zetec is the way forward tbh

martinmilne

i think all the big power rs turbos are still cvh was just wondering wy people dont really do zvh any more year or so ago they were really popular

conor.rst

iTrader: (3)

Just go zetec turbo now Zvh is more hasstle than its worth,

12_Second_rst

iTrader: (1)

not really mate the only big power cvh left is stu collns and tony turbo's but thats gonna be in bits before we know it

truth is tho u can build a 350bhp zetec for a fraction of the cost of a cvh

conor.rst

iTrader: (3)

true. depends what ya wana do tho. alot of advantages with both engins.

12_Second_rst

iTrader: (1)

name 1 advantage of a cvh over a zetec???

dandannydandan

iTrader: (2)

What sort of mods are needed for a CVH bottom end to hold 250hp ish and not break. Just interested so as I can check it against my spec list.

conor.rst

iTrader: (3)

Weight ..... just to name one.



250 A standard block and internals COULD and have been known to do it. Pistons should be fine i would get some good rods tho

12_Second_rst

iTrader: (1)

i think ull be supprised as to weight

how about this

stronger bottom ends
under piston oil jets
larger capacity
better flowing heads
dont wear out cams every 5 minuites
can run a rear starter
can run 3 piece driveshafts


you want me to go on?

Rob_DOHC

iTrader: (4)

Originality and character

Sounds stupid, but it almost (for me) feels like going zetec is taking the easy option lol

Having said all that, I agree the zetec is the far superior engine, aftermarket management and zetecs are dead cheap now, compared to even 5-10 years ago when zvh's were more of the norm.

Rob,

conor.rst

iTrader: (3)

Lol i didnt relise this was a competition. like i said there are advantages to both engines.

12_Second_rst

iTrader: (1)

i get what your saying but tbh from a performance point of view the zetec wins all day

12_Second_rst

iTrader: (1)

no competition but just cant see why people bother with a cvh i cant see 1 benefit of a cvh over a zetec

i get what rob means about originality but tbh people are more than happy to upgrade there brakes etc and everything else which is far from keeping it original

just my opinion anyway

conor.rst

iTrader: (3)

If your chasing number yeah.

I agree rob to me its much more impressive to have a 300bhp cvh than a 300bhp zetec.

Zetec turbo are great engines i dont dout that and i will be putting one in my next car. but i think if you have the money cvh

12_Second_rst

iTrader: (1)

what for bragging rights about having a 300bhp 1.6?

martinmilne

but wat about all the fabrication to make a zetec fit with the gearbox to take the power ! im sure the zetec is better engine so are zvh's pointless now or do they still do the buisness ?

conor.rst

iTrader: (3)

The advantage of cvh is that it can make good power with minor mods not everyone is after 300hp. I agree that if your going for monster power then zt is going to be the way to go but nothing wrong with a good old cvh

conor.rst

iTrader: (3)

A zvh can make good power. if your after big power just go full zetec.

martinmilne

i was just wondering wy people dont do them anymore you dont really see them about much was there a problem with them or just out of date now ?

conor.rst

iTrader: (3)

yeah basially. and all the effort gone into gettting it to that spec. I am not saying cvh is a better engine im just saying they can both be as good as each other. but if you after monster hp ten the zetec will be the way to go.

conor.rst

iTrader: (3)

theres a few of them about. if you look in the resto section MUZ has one nearly built. should make good power.

jaiscossie

Personally i still like to see a good old cvh or zvh lump as its more inkeeping with the cars era, zetecs are great mind you and seem easier to get big power out of

12_Second_rst

iTrader: (1)

no real fabrication needed to make a zetec fit just rework 1 bolt hole on the standard engine mount

u can use the standard 1.8 zetec efi inlet

and an rs turbo exhaust manifold with a 40quid adapter plate
i admit u need to spend some cash to make a strong engine suitable for high boost

but when u add it all up and compare it to how much a good flowing cvh head costs on it own

and piston and rod packages seem to be the same for zetec or cvh

and at the end of the day you need to spend money on a cvh to acheive good relaiable power

the zvh was developed to allow people to benefit the stronger zetec bottom end and enable people to retain there standard inlet and exsaust etc but now aftermarket management is soo cheep full zetec is easier without fafing about

you only have to do the math to see which is best ive had all 3

cvh zvh and now zetec

dont get me wrong the zetec has its downsides aswell with the main 1 being the oil pump

martinmilne

wat do all the diffrent engines behave and drive like as i know the zvh and zetec are more tourqey how does this affect the driving

Rob_DOHC

iTrader: (4)

Bigger capacity means more torque, less lag (if you use the same turbo), better off boost performance, better head means a higher rev limit and a broader power band.

Rob,

martinmilne

i take it the zetec is the most reliable but are the zvh better than a cvh or worse in terms of reliability ? not talking about monster power ust in genral

stuart collins

iTrader: (7)

12_Second_rst

how come u are selling your car ??????

conor.rst

iTrader: (3)

no not at all. aslong as the parts are in good condition and you have a good managment setup

12_Second_rst

iTrader: (1)

I'm not now mate bought a cheep run about because I lost my company car

S2Dan

I would say for strength at big power it makes sence to got for ZVH or Zetec. I am in a situation where to take my 1900 to well over 300bhp, is gona cost alot more then say a ZVH, plus the strength and reliablity of it cant be compared to a ZVH or full Zetec. I'v made my mind up, which is the 1900 aint strong enough for over 300hp coz of the old CVH design.
But dont get me wrong, if i wanted to keep it orginal, it would have a 1.6 cvh in it.

essexRSTSouthend

Cvh all day for me.i like taking the time and effort and money building a big power cvh.going the zetec route is all good if your lacking funds to build a monster cvh.just my opinion.love keeping it cvh.the amount of people who go to me,oh it aint a zvh or zetec is it,im like no,then you see them smile.everyone different.i like keeping it factory looking outside,big power cvh inside.im getting there slowly with mods.head alone cost 920quid,just head work.cvh costly.but so can any engine if your willing to do the work needed.

S2Dan

Believe me my friend, it aint an issue of being short of funds, the amount of money being invested into building a monster of a ZVH shows that. But if i was to pump the same dow into my cvh, yeah it probably will reach well over 300hp, but how strong will it be under extreme loads?? But for reliablity issues, and to protect the investment, i want a stronger design of engine.

mr_joe0606

iTrader: (1)

i think zvh is the worst parts off both engines shit chv head and a weak zetec bottom end personaly i duno why people go down this route

essexRSTSouthend

You got wrong end of the stick.people want big power with min efforts.costs less to do than a cvh build.but as i also said,any engine can be built if you got the money.i didnt mean zetec are cheap,only when you want a simple power gain over the cvh it cheaper.then of course if you willing to spend the dosh on zetec for mental power,it gona cost more than cvh

essexRSTSouthend

Zvh was back in the day.can be good engines.but hence reason most people go zetec or stay cvh

S2Dan

Yeah i hear what ya saying mate, and i aint a hater of the cvh, i mean i have had that 1900 in mine, well tuned up for a ages, and it is a good lump. Just how i am thinking, if your looking for monster power, is it not best to invest in a newer, better design engine, which is potentailly stronger and more reliable with coping with higher power outputs?
Just my thinking towards this discussion, end of the day anything is possible, anything can be achieved, so cvh, zvh or full blown zetec can reach any figure, with money, as mentioned.

Karlos G

iTrader: (4)

Bottom line is a ZVH has all the problems of a CVH and NONE of the advantages of a Zetec!
It is NOT stronger than a CVH, nor is it more reliable and it costs as much to build a good one as it does a Zetec Turbo so whats the point?
IMO if your staying CVH it's for originality, just because you want to, or because you dont have the budget for anything other than a stock CVH..... otherwise go ZT.

I'm CVH but had I known how far I was going with my car from the start I would have built a ZT.

essexRSTSouthend

Yes has crossed my mind.think if i had another car to play with id go mental with.must be due to the way my cvh pulls i have no reason to think of engine upgrades.i spose end of day,if your happy with what you got,thats whats counts.im happy.best of luck with your rs dude