StephenC

Right, been off the scene for years now but catching the bug again. Ive still got my NMS stage 5 engine in the car but been stood for 5+ years I'd say. I think the block isn't useable, I believe it has a hairline crack on the front. So out of that the steel rods and pistons (standard size) and crank are probably more than fine. The head is a NMS head but again hasn't been used for ages so would need a freshen up, but, its an oddball and has oversized followers which no one does anymore so the only option ive found is newman said they may be able to do a batch of solids oversized when they do the next batch, and in fairness I would probably be using one of their cams in it.
So, ultimate CVH. Whats needed and who is on these nowadays? I don't need people saying go zvh or zetec, im not going down that route. Im sticking CVH and would like to use some of the bits I already have. So, with 320BHP+ in mind, what spec? Keeping in mind it needs to be bombproof near enough. Don't want to be messing about every 500 miles (don't get me wrong, I know in that state of tune it will only be good for 20k miles).

It's Czech Mate

I'd just call Karl and ask him.

CrOwSoN15

1900 is essential IMO, going by what I've read about the strength advantages over the 1.6.

Billy_RS

iTrader: (5)

Stu Collins has a CVH that's gotta be up there. Ask him mate

Ben26

Ive got a fresh block If needed
Its .25

bigchez

whatever spec Ollie from NMS was running in his!

bigchez

how is a block that's already been bored a fresh block?!

rs-tuner

iTrader: (1)

I'm sure he mentioned on a thread he has built a 1.6 cvh with over 400 bhp.

It's Czech Mate

I think most of the top performing cvh I've seen have been 1.6

gus

iTrader: (1)

I'm with you on that

I'm sure that was over 400bhp years ago

gus

iTrader: (1)

To be honest tho unless you can sort running gear to cope I wouldn't bother chassing big numbers

rsmark86

iTrader: (3)

Stu Collins is the person to speak too, he's running solid lifters and a custom roller rocker set up to stop it pulling the rocker studs out of the head on boost

And nms the best cvh tuner

For me it would be
Gtx28 with external gate and screamer
Crazycage custom manifolds
Cosworth throttle bodie
All steel bottom end with slipper type rods and pistons
Your nms head with the custom lifters
Roller rocker set up like stu's
Fully balanced
Siemens injectors
Management fitted and mapped by mark sheed
Grs coolers
Genuine ford head gasket!! Best for a cvh
A genuine ford oil pump if you can find one, burton ones are shit!!
Helix 6 paddle, was told they will make to order
Hydraulic clutch set up
Frs mk1 box set up
Maybe dry sump to get around oil pump problems
Nms spec cam or new mans cam specced to suit

I could be here all day with building the ultimate cvh lol

And don't forget the fuel system

v man

Karl mentioned he could have 500 bhp from a 1.6 cvh

I'd just ring nms mate

stevenebm

iTrader: (6)

Stephen if my car goes I have some decent Parts that will be up for sale.cosworth management on l6 ecu with coil pack mod.sitech side fed inlet and a crazy cage over the gearbox manifold that is brand new although I had said to gadget if it was any good to him and he is seeing how much it would be to change the flange on it as its for a cvh which would be perfect for you.

Karlos G

iTrader: (4)

Things have changed a bit since your CVH was built, NMS do not use CVH blocks for big power builds any more, they are too brittle and prone to cracking these days.
A sleeved Duratec (I think) block is used with custom crank, rods and pistons, then matched with a NMS spec CVH head and cam, then it's just a case of manifolds and turbo.
Obviously things like the fuel system, clutch, gearbox, management, mounts, etc. all need to be considered too, but that goes without saying.

So in your instance nothing you have can be used except the head.

Of course if you do stay true CVH and use an original block that's up to you, but Karl says they do not last long at all and advises against it.

rsmark86

iTrader: (3)

500bhp from a cvh?

I want to see it, that would be mental, I can't see how they could stop the head lifting from the block?

gus

iTrader: (1)

from what i understand the roller rockers are a bit hit and miss

i have looked into these alot and did speak to titan about remaking them

but after speaking to a few people in the know they all said oe is the way to go
karl @nms use to get them made in batches but had a few problems with them so stopped using them
i forget the reason now but they all failed at the same point (he was pushing harder than most with the cvh powerwise)

as for ultimate it would really depend on what you are using the car for imo

StephenC

As it stands the car will need full new fuel system and full wiring so any management is a possibility really. Is Cossie the way to go or something more modern?

Steven, the manifolds would be awesome, I want side fed as im using a power engineering rocker cover that would be better without trying to squeeze a charge carrier over it.

rsmark86

iTrader: (3)

True but cvh blocks have been proven at 300bho many times so if he wasn't looking for a lot more than that then I would just rebuild what he has

But if he does want to go mental then sell it all and go all out on the new spec and have the best out there

StephenC

Nothing other than a toy, not specifically drag but would like to run it if I want, and again not a pure track weapon but in all fairness that's probably where the bulk of use would be. I know going for an all round spec isn't ideal but im not wanting to break any records, just have a shit load of fun in the old girl.

stevenebm

iTrader: (6)

Cool mate well I need to see if my car goes before selling but they are decent bits of kit

Karlos G

iTrader: (4)

He said 320bhp+ and they will not be reliable which he also said he wants.

rsmark86

iTrader: (3)

Cossie is great in the hands of msd and nms, but you could have a better running package and more drivability with something like altronic sm4 or vipec with either a gtx or a borg Warner efr type turbo

These things are light years ahead in terms of development compaired to webber and old garrett turbos

StephenC

looks amazing piece of kit! Keep us informed with any progress pal

gus

iTrader: (1)

wheres christian when you need him

rsmark86

iTrader: (3)

Then for me it's the new duratec route and an upto date turbo set up

And Steve the manifold looks the tits, my zetec head is tapped for a cvh manifold too

StephenC

without sounding dumb, which duratec is it?

stevenebm

iTrader: (6)

Stephen if a was you id go for a solid 300bhp on as little boost as possible.that with a good gearbox in a stripped out rs turbo has got to be a fun track and road car.

StephenC

Totally agree, I think more than power I just want it to be reliable and feel that way. When it ran before on the 5th injector setup etc, it always felt like luck had a lot to do with it

gus

iTrader: (1)

Wouldn't even need that

I had a blast in mine at brands was only running 18psi instead of the 32 it was mapped at

rsmark86

iTrader: (3)

Best thing to spend money on is transmission and management

For me I would rather have 270bhp and punchy as hell

On my zetec turbo I'm fitting steel rods and selling my t34 to fit a t3 hybrid so I can run like 1.8bar and have bugger all lag

StephenC

Plenty of food for thought here, keep it coming

gus

iTrader: (1)

Defiantly sort the box first. Then up power

Mk4 Rick

I was just thinking of Christians car.What happened to it wasn't that a 1600 cvh with mental power?

stuart collins

iTrader: (7)

jamsports new head gasket will stop the head lifting








oil pump problems taken care of with zetec dry sump kit with block modded

only thing i would change is to a steel crank but has any 1 eva snapped a crank

block is the weak point mine twisted last rear across the mains

Ben26

Sorry . When i say fresh i mean ready to go. Bored , honed and decked . To me thats fresh. !

rsmark86

iTrader: (3)

ive seen a few blocks cracked lately

me personally love my zetec turbo, as most will know i swore by all my old cvh's but i wouldnt go back, when you can build a 300bhp zetec turbo for around a grand

i know a guy who sells steel rods for £300 with arps and glyco bearings
c20let pistons £100
devil developments valve springs £150
then that leaves you £450 for frs gaskets, rebore to 86mm, rings, water pump and timing belt kit and it will see off a 300bhp cvh with ease due to drivability and the way it delivers its power

and to get a cvh tall block to except 300bhp you need about 2.5k

you could do the zetec even cheaper if you follow karlos and use a st170 bottom end and black top head with 1.8mm frs head gasket

Karlos G

iTrader: (4)

I can't remember mate, it was a while ago I spoke to Karl about it, but basically it's a 6k build or there about's with all the custom parts so not cheap, but he said that's the only way he would build big power CVH's these days as the blocks are just too unreliable now.

StephenC

Suppose a zvh could be an option?

Karlos G

iTrader: (4)

How does the gasket stop the head lifting?
I remember Christian and Karl talking about going M12 bolts but worried about the block taking it.