boothy

iTrader: (14)

As above:

Price?

what pistons?

Want to build a cheap 1 if you can any help cheers Rob

RSMK4TURBO

Id like to know the cost aswell need see my tuner,as i understand its cvh head mated to a 2.0i zetec block,suppose to give lots of torque.Notsure what pistons to use have been told that people use calibra turbo pistons.

boothy

iTrader: (14)

Yep know about pistons just want the tech info

Been told can do it for about Ł500

Red16

been covered and posted loads of times but here you go

http://www.quantums.info/zvh.htm

boothy

iTrader: (14)

Cheers thats a good read

bluntys1rsturbo

u going gt motorsport get it done ? if so ya wont need ask on here as hes done loads of zvh conversions

muz

You need the C20XE N/A pistons for a ZVH build, NOT the C20LET pistons. They are for a Zetec Turbo conversion.

Red16

These pistons and rods would make a very solid ZVH

http://www.cnc-motorsports.com/produ...ID=21725&CtgID=

xr2wishy

iTrader: (2)

they're for blacktop engines and the compression ratio is a little on the high side.
good price as long as customs don't sting you.

Red16

Providing you use them as a pair from the correct engine, eg silver top rods and silver top pistons or black top rods and black top pistons they fit perfectly in either engine.

That compression ratio of 9:1 is for a Zetec engine, the Zetec cylinder head has a smaller combustion chamber than the CVH head, meaning that if you fit those to a ZVH the compression ratio will be lower, somewhere around 8:1

muz

Finally! Someone who understands (not saying you don't Wishy as I'm sure you know) Every time I've told someone to use XE pistons not LET pistons for this very reason everyone just says "LET pistons are the turbo ones , so they're the ones you need, my tuner told me that... " Yes I'm well aware LET are turbo ones

Karlos G

iTrader: (4)

The 3 biggest expenses of building a good ZVH are...

Stage 3 Big Valve Head Including Newmans Cam/lifters, around Ł1000 from say NMS.
Stage 3 T3 around Ł800 from TT or CR Turbos.
EFI Management Ł500-Ł1500 depending what you go for (MS, Cossie, Gotech, etc..)
You can of course try and source all that second hand which will save a fair bit.

IMO if you do not have all those box's ticked you may as well just build a good CVH, because without all of those you'll struggle to make more than 200bhp

sas

I have put together this guide to the assembly.

http://www.sitechracing.co.uk/ford-z...uild-guide.asp

Chip

iTrader: (3)

Early XE pistons that are pressure cast (aka forged) have a different part number on them, they have a P to denote being early ones.

Late ones are still reasonable pistons, but early would be better.

Chip

iTrader: (3)

Ps

PEC do the rods with the correct Zetec 2.0 big end size and the correct vauxhall piston pin size.

muz

Early Forged jobbies should have a serial number cast into the bottom starting with 86Pxxxxxx

xr2wishy

iTrader: (2)

if you want to build a cheap one to hit around 220bhp+, then 1.8 bottom end, earlier the better and skim the pistons, ported head big valves if you want, cossie turbo, 2wd or better a 4wd, you'll see a fair amount of acceleration pal.
to do it right for big power, then steel rods and forged pistons, big valve head (but you may as well go 16v for the extra cost)

Chip

iTrader: (3)

Yes, 86 is the size in MM and the P represents them being "forged" (they are actuall pressure cast I believe, slightly different process, same as cossie ones comapred to cosworth racing ones)

muz

That's that one Chip. I don't think Mahle actually make fully forged pistons do they? They are all squeeze cast aren't they?

Chip

iTrader: (3)

Yeah its not forged in the true sense of the word, but they are still VERY good pistons, a fiend of mine has seen over 550bhp on a set of the LET ones, and YB ones also will do big numbers (same standard of piston)

bezo

FRS pistons and rods work very well.

boothy

iTrader: (14)

Cheers mate

xr2wishy

iTrader: (2)

i've heard from an engine builder that the earlier ones can take more boost too, and 300bhp is possible if it's mapped well.
defo 250 is achievable though without mega expense.

boothy

iTrader: (14)

Thats what im after no more than 250,Hard enough to drive....

So how much would i be looking at all in roughly build it myself just get machining done

Chip

iTrader: (3)

Full FRS engine for 2K secondhand makes the most sense if you can find one, whack it on management and jobs a good un for nearly 300bhp and very very reliable.

xr2wishy

iTrader: (2)

about Ł300 i reckon for the bottom end, new pump and tensioner, head bolts, skimming pistons etc.
it's cheap for sure, you still need a ported head and a decent turbo, then there's the management side of things, i'm on megasquirt with 440cc injectors, so that's a fair chunk of cash on top, mfi just doesn't cut it for efficiency and reliability IMO.
plan on a grand and a half to get it done cheap, sourcing used parts. and sell all the bits you have already if you can.

boothy

iTrader: (14)

Oh ok that sounds fair enough....

Its running ofab Efi will that be fine

boothy

iTrader: (14)

Would love to do that chip just a bit out of my price fange

xr2wishy

iTrader: (2)

you can run OFAB, you'll need it mapping though on a custom chip, the zvh and cvh operate on completely different maps.
i've compared my engines map to another on a cvh with similar turbo and injectors and the difference is quite abit.

Chip

iTrader: (3)

Fair one mate

Just make sure you dont end up spending that much on a CVH like a lot of people do, its easy to get carried away then wish after you did something different

xr2wishy

iTrader: (2)

for cheap, a zvh is a winner as long as you don't want to chase massive numbers, cause you should go full zetec then and fit the right parts for the job.

boothy

iTrader: (14)

Will do mate

boothy

iTrader: (14)

How much to map it ?

RSMK4TURBO

Yea ive spoke to him about it in past its just an option as im in 3 minds wether to spend more on rs turbo or sell and get a saph or mk1 focus rs.

cymande

So the early let pistons are good for a zetec turbo???

Karlos G

iTrader: (4)

It's expensive and very few tuners have the required equipment to map it, OFAB and OFAC are only really any use if you run a CVH and are happy with an of the shelf chip, I dont know if there is one available for a ZVH? Probably not as there are so many variations!
Standalone management or MFI running 200bhp'ish are your options, but as I said above if your only going 200bhp stay CVH and save a bag load of cash!
You could go 5th injector but that still leaves the unreliable MFI setup in play.

boothy

iTrader: (14)

Ah i see quite dear then,im on efi by the way mate

xr2wishy

iTrader: (2)

megasquirt it then, few quid for sure, but you can then fit it to most engines, so an investment in the long run.
since you're already on efi, there isn't much to be changed, you'll need to cut out the multiplug going to the current ecu and then solder in wires from ecu to bits of loom you need.

Karlos G

iTrader: (4)

Trouble with MS is that again not many tuners will map it because of the potential problems caused by the DIY installer
If there is one local to you then go for it, because as wishy says it's just as case of wiring it in which is really easy of your already EFI
If not then ask your tuner what management he prefers and go for that, as he'll be mapping it

boothy

iTrader: (14)

Top 1 something to look at in the future