rstdave

iTrader: (3)

Not long had my s2 up and running after some quite extensive work, it's now runnin 245bhp on omex management. It's still 1.6 but due to funds at the time i didn't use steel rods/forged pistons when i built the bottom end....which i now wish i had so i could have revved it higher and ran more boost!! Wantin to build another bottom end over the winter and was toyin with the idea of using a 2.1 zetec bottom instead of the 1.6, just wonderin what sort of advantages/disadvantages and gains there's realistically going to be over using a steel 1.6 bottom end??? I'm only runnin a t3 at the mo but going to use a gt series turbo of some sort with the new bottom end, lookin for a real 300-350bhp and was thinkin this might be easier to achieve with the zetec, opinions please

matt p

Tbh mate comes down really to how much you want to spend,

What spec cam or cams are you looking at and also id say get a gt30 turbo wont get much change out of about £1150 though for the turbo

Engine wise do you want a full zetec 16v or just keep the cvh head?

Zetec's are good and people that say they dont rev are chatting poo

But a 350bhp 1.6 will be a little bit more special and you want have to chop and cahnge parts to build it unlike the zetec mate.

HTH

Matt

CliffRS4

iTrader: (1)

Couldn't have put it better Matt

So true about people saying that zetec's won't rev

Turbocabbie

For me it would either be CVH or Zetec I really would not be interested in a ZVH at all

Badman38

iTrader: (2)

dont bother with the zvh bloody expensive to build one right either all steel 1.6 or a 16v zetec or you go zetec Source the engine internals from the states steel rods and pistons for under £500..

thanks

sean

Charlie Chalk

iTrader: (1)

I'd say your looking at a good part of 8k for a 350bhp cvh

go Zetec, and turbo that with the right amount of valves

rstdave

iTrader: (3)

Cheers for the replies guys....was thinkin i could have built a zetec bottom end for similar sort of money as a 1.6 but seems like people don't really rate them which is good to know! Never driven an rst that wasn't a 1.6, what are the zetec's like in comparison would u say????
On the full zetec turbo route, i'd love to do that but just feel it would be too much work as i've put quite alot of work into the 1.6, especially with the head porting which is why i was wanting to keep the head/cam setup. A 350bhp 1.6 is obviously a good way off what i've got now but realistically what else would i be lookin at needing to do besides a steel bottom end and perhaps gt30??? turbo/ remap etc?? Anythin else major i mean! As well as this, what are 1.6's like to drive with a turbo that size....don't want it turning into a massive lag monster! Atm runnin t3 specced for 250bhp by turbo dynamics, big valve ported head/newman cam, 22 psi.

matt p

Probably a decent gearbox mate for a start, coilovers, adjustable arms mainly so its easier to get the power down and that.

You really need to speak to stu collins or christian mate as they are the only people well apart from tim who i know of, have 300+ 1.6 cvh's.

Personally id sell the head you have now stick a standard one back on and then get the readies together for a 16v zetec conversion if you want big power, other wise keep what you have got and build a steel bottomed end 1.6 over time mate.

There is no rush

Turbocabbie

Just how good is your head ?
A standard zetec head which comes with the engine is good for 300bhp without any problems and with headwork will obviously increase performance

I would sell your CVH head and cam and put that towards the cost of a zetec

rstdave

iTrader: (3)

There is no rush ......I know what u mean mate, that's what i was planning on doing i.e build a steel bottom end over the winter as funds allow....then the turbo etc

Got a stage 2 bernie box and ap cp200-35 clutch atm along with mef adj tca's and to be honest i'm surprised how much grip it's got, once it's out of 1st it just hooks up and goes with controlable wheelspin.
As for the head the only reason i was wanting to keep it is cos we spent alot of development time on it, it's the second head we've tested on mine along with another on a different engine that we dyno'd and the one now made some quite impressive results we thought when compared with the others and is good for more power with a different turbo we're predicting. The engine really wanted to rev which the others didn't, just as an idea the engine was still making power at approx 6200rpm, but the lack of steel rods meant we couldn't rev it further as we would have liked to!
But as u say i really need to speak to one of the people mentioned above as they are the ones who have actually done it

b_kennedy

I dont understand y people slag off zvh's. at the end of the day its down to that persons own opinion. they are spending the money and driving the car after all. It took alot of time and effort for me to build mine and I'm more than happy with the performance. I have a blown a good handful of expensive cars off the road with it and she has never let me down.

Dont mean to sound like i'm winjing but everywhere u go there's someone saying something or slagging someone's car off

sorry guys but i had to say it

Ade

Both for under £500?! Where from?

Micky

Just to add my 2 cents worth,while getting an engine to make 300-350 BHP will be costly,getting that power thru a clutch/gearbox will be an even bigger problem.Thats before we even get into how an RST will handle/put down such horsepower!Regrads,Micky.

Badman38

iTrader: (2)

b_kennedy there is nothing wrong with the zvh engine but to get one producing big power costs and in some cases more then a 16v zetec, i have spent quitea bit on my zvh and i have just spent loads more rebuilding the engine and Modifying the main caps. Originally i bought my cvh cylinder head from pumaracing for just under a grand which i was using on a 1.9cvh but after i blew the engine i wanted to keep the head with a stronger bottom end, then seeing the cheap price zetec parts from america i had to go zvh. but for the same money you could have a good spec 16v zetec
i am in the process of getting the car ready fro the next daddy thrash my cts stage two plus been rebuilt with a 3.6 final drive, a new newman ph4 zvh cam, wrc spec driveshafts and a higher c/r zvh with a different ecu and some proper drag tires, i hope to better my times then what i did at the last daddy thrash.

thanks

sean

Badman38

iTrader: (2)

twin plate paddle and a mtx75 job done i am using a cts stage two plus but if you are running 350 fbt or more the bc box has to be rebuilt every year because you are on borrowed time otherwise,
mtx75 everything about the box is stronger the gear set, shafts,crown wheel and pinion, synchro etc, clutch wise look to area-six ultimate clutch or failing that a twin plate paddle which is what i run but you have to change your clutch operation to hydraulic.

thanks

sean

Badman38

iTrader: (2)

je pistons and eagle steel rods from here www.nolimitmotorsport.com me and paul johnson ( black 500hp fiesta zetec ) run eagle rods which cost $330 or £164.

or cosworth steel rods $499 or £264 i am still trying to find the website.

thanks

sean

DazC

iTrader: (1)

Either 1600 steel CVH or a PROPERLY specced Zetec.