stuart collins

iTrader: (7)

are there any different casings that are thicker walled or are they all the same

russ rs

Maybe try n/a block as had less stress??

rsmark86

iTrader: (3)

i saw someone trying to sell a s1 block claiming its thicker walled than a s2

dont know how true this is, only way to tell is cut them up/ check them?

i got a low mileage xr2i bottom end needing bearings..... FOC?

only thing i know from research is a xr2i efi head is the best one too use when going big power due too being the best for larger valves, but nothing said about blocks.

this guy says to use a s1 block with s2 crank and oil pump but dont know how usefull he is.

Karlos G

iTrader: (4)

AFAIK They are all the same thickness, as Mark says a low milage NA block will have seen far less heat cycles and a lower temperature range so will be less fatigued and less likely to crack.

Red_bull

A bit background.. Is the topic starter building a big bhp engine, but they keep cracking? Where?

stuart collins

iTrader: (7)

my block finally gave up sat nite 6in crack straight down the bore , 438bhp @27psi

SBT83

Didn't we all have a conversation on the strength of the cvh a while ago? Wasn't yours running sweet for 10+ years Stuart?

It may not be worth the money or hassle compared to a zetec build but what about engineered liners? Personally I wouldn't bother or know where to start but it's an option?

stuart collins

iTrader: (7)

mines been in he car 14 years, had to be machined straight as had twisted across the mains last year and now cracked , cant really complained its had some big power put through it , just a pain more than anything ,its all stripped and be machined this week , just wanted to now if any blocks where thicker

Red_bull

on which cylinder did it crack?

stuart collins

iTrader: (7)

2 I think

SBT83

So what direction you gonna take now Stuart? You gonna source a decent cvh bottom end?

CrOwSoN15

N/A is the best option as said, less heat cycles will be in your favor.

DixieTheKid

iTrader: (2)

I was talking to someone the other day about cossie blocks, i know its a little off topic but touching back to the lining subject, this guy said having a cast block honed, lined and " nickel coated? " is the way forward. Expensive to do but will take huge bhp.

Anyone have any knowledge of this?

SBT83

I'm sure it's Rod that's having the block lined? I maybe wrong. It's a good idea for big bhp. But for cvh? Be better going zetec.

Should be easy enough to find an xr2i cvh to use. Try not to twist it again Stuart

escortmk3rwd

Blocks exactly same

bennrst

Big power tho stu,y boy

stuart collins

iTrader: (7)

I will not be goin zetec

stuart collins

iTrader: (7)

we got loads of blocks

be going for machining next week

SBT83

are you gonna use this as a point to push for more? Or is the previous setup ideal for what your after?

stuart collins

iTrader: (7)

theres more to come yet

SBT83

Top Secret! Keep it under wraps mate

mothrs2k

I may have commented on a pic of your car on facebook last week, saying how long it has lasted...wish I didnt bother now lol

gus

iTrader: (1)

why????

surely thats enough

turbotrev

I have a Series 1 block in my car, Karl told me at the time of the build that it is indeed a thicker walled than the series 2 block the car was originally fitted with, this may help you?
Although as previously mentioned ain't 400+hp enough!!!!??

Cheers Paul

Karlos G

iTrader: (4)

Karl who mate, Norris? If so then I would certainly take his word.

turbotrev

Yes buddy Karl Norris, sorry

Cheers Paul

Karlos G

iTrader: (4)

Learn't something new today then, good to know for anyone building a big power CVH these days
I imagine they are very very rare, do you know if it's just S1 blocks or any MK3 escort 1.6 CVH block?

Maxwell

Sisters bf is a bit pedantic with Ford atuff and he said that series 1 blocks where different to the rest of the 1.6 cvh stuff.

And he also said that rs1600i's where built with ford "selected" parts (as near to perfect/the best produced)

stuart collins

iTrader: (7)

any numbers on the block mate

little bram

Can you not get liners for it stu?

SBT83

little bram

Was just thinking if you can get the right bore size liner then could you not machine it down to fit the block?

SBT83

I'd have thought you could. Dunno cost but I assume that's the process.

Would a n/a block be slightly stronger material or at least a denser material to help with the higher compression rather than low comp turbo block?
Daft question but I'll throw it out there

little bram

Imo no the way I look at it is yeah its higher comp but the rs block has to cope with twice the power so needs to be stronger

SBT83

Told you it was a daft question

little bram

That's just my way of looking at it mate I mite be wrong.

Skinny

is yours the awsome white one that was on jam sport stand if so awsome piece of kit mate

turbotrev

This is what my paperwork says...

turbotrev

Im afraid I'm not sure mate, guessing just S1 blocks? Karl would be the man to ask....

I'll have a look at the weekend Stu (the car is not at my home presently)

Cheers Paul

wildheart

iTrader: (4)

Karl told me some years ago that any CVH block upto 85 are the ones to go for.