Hi, i'm gonna do a new bottom end for my s2 rs turbo. i'm having mixed feedback about which 2 go 4. i've been told just to low comp the 1.6 botom end and that would be fine but i've heard u can use the 2 litre zetec from a focus. is this true? i'm running about 190bhp from a harvy gibbs top end, stage 3 turbo, switable boost chip (7 and 15 psi) and front mount intercooler. i was told with a zetec low comp bottom end i could turn the boost up to around 28psi and see around the 250bhp mark. which is the best 2 go for and whats involved? many thanks

 

id like to know also, maybe low comp 1.9 aswell maybe?

 

hi comp steel 1600

 

you have to cofuse the matter dont ya stu

 

I have used a bottom end from a Focus RS.
The compression ratio whould have been 6.3:1 if I bolted my head straight on because the Focus RS forged pistons have a large dish in them.
So a large head skim is required (or new pistons) I also fitted longer rods.

I am now up and running but have not been on a rolling road yet!

I had a 1.9 CVH which was running 27psi and 320BHP but this Zetec build feel a lot quicker!(lights the tyres up at 25psi in 4th gear).

 

Theres no subsititute for more cc's

 

In my opinion, if you go down the increase in cc route then you should change the cylinder head to a 16v item also. The most restrictive part of a CVH engine is the head!" the bottom end is plenty strong enough. I'd either stick with the 1600cvh bottom end, lower compression ext or do a full 2litre 16v conversion

 

To me it is the chalange of the 8 valve head!
I have only started tuning it his year but I do feel there is untapped potenshal.
But I guess we will see?
S.

 

1600 head restrictive,thats funny look at stuart collins car 350 bhp,very restrictive......NOT

 

but then look at what he has done to engine to get there



think he is just saying that its alot easier, chealer to do afull zt

 

450bhp is easily Achievable with the right cvh head,

but then gus is right takes a fooking lot of money and custom parts to get there, much easier with a 16v head.

 

wheels spins in 4th!! what in the dry? then sort out either your your tyres, diff and a decent set of adjustable lower arms.

 

I think you will find that I dont run much negative camber and my toe settings are at at 2mm total toe out, almost no torque steer!
The roads are dry.
You should try 3rd gear, it spins all the way up to 7200rpm rev limit!
I do have proper Avon ZZ3 tyres.
S.

 

u sorted the box yet si

 

Yip up and running, really really well.
Went for a blast last night - amazingly quick
But I guess it is all talk on my part, we will have to wait a little till we really know how quick.
S.

 

if u want them injectors there in the bk of my car mate

 

must be a problem with escort turbos alot of them have problems with traction. fiesta rs turbos with more power then yourself dont seam to have these same issues, but it also could be the cvh power delivery.

 

The wheelbase does have an influance on traction, and yes the Festa does have an advantage.
But the biggest issue on traction is power delivary and due to spec of my turbo unit it only delivers a small amount of boost between 3 and 4 thousand rev so it comes in with quite a force at 4200 so light the tyres up.
I would be going to Santa Pod this Sunday but I now have to work!!

 

i'm down the pod on sunday with a spare set of driveshafts bloody keep on breaking them, will need to get some practise in to improve on my Previous times, but i have major traction problems at the pod.

 

Are there many more people going on Sunday as I might have to try and get out of work.

 

quite a few from this site and fiestaturbo.com loads camping due to the saturday night special.

 

i mite go

 

get a need turbo then si ive got a new custom spec turbo cumin , speced to flow 400bhp with minimal lag

 

There is. It's called a turbo.

1600 CVH for me.

 

1600 cvh for me aswell,its all good

 

Thanks for the info Stu, but mine does boost upto 2.5 bar at the expense of lower rev power.
My inovate lambda guage is getting repaired so not too sure where I stand in the fuel supply staiks?

What clutch are you running?
Si.

 

sas Any engine pics?

 

standard 1300 cvh

 

The 1600 cylinder head is restrictive!" there is obviously lots you can do to improve it and loads of people have achieved very good power figures from it. The point I was trying to make was that in my opinion its only worth while going for extra cc if you use the 16v head to make full use of it. The 1600 bottom end works very well with a mod head so I personally would stick with that.

 

go zvh torque is awsome i had low comp cvh now running 1.8 zvh it defo pulls a lot harder and is a very cost effective mod.

 

sas
you must have something wrong as mine puts down all of its power in 2nd,3rd,4th etc..