Mike Rainbird

iTrader: (3)

And I thank you very much .

Will post up full spec of engine with sheet .

Micky The Finn

are the latest foci not 11.1?
i will find out in an hour or so when m-sport finish for the day.

mike,mines not a wrc car but it has a 36 tooth pulley on T6.

Stavros

Focus WRCcar or Focus ST?

Focus ST is 9:1 compression.

Would expect nothing less from a low boosting 2.5litre engine pushing 225bhp.

Almost suprising its not more TBH.

Micky The Finn

iam talking about wrc cars.

leecavturbo

i know i can go away and build my engine to suit and as tried and tested lower comp makes for easy power with boost and reliabilty, i just wondered why others can make the power on pump fuel ,and then maybe saving Ł500-600 its gona cost to get my C/R down.
evo fq's have high C/R iirc too?????

Mike Rainbird

iTrader: (3)

Evos are 8.5:1, but have a much smaller bore than a Cossie (85mm), so can run a higher compression. How does that compare with your engine?

leecavturbo

87mm bore 86mm stroke

Mike Rainbird

iTrader: (3)

You can probably get away with low 8s, but you still need to lower the c/r from 9 .

leecavturbo

i sort of already knew i'd have to just wanted to know about how it can be done other ways but not with hi-octane fuel.
basically fooked up on the build when a valve spring broke, i had to take the head off and been a bit skint opt'd for a cheap 1.2mm gasket instead of the Ł100 1.9mm cometic. a long with some extreme head skimming by the twat of a engineer, led to the high C/R

Mike Rainbird

iTrader: (3)

Anyway, I can't be arsed to sort the scanner out at the moment, so here are the figures for a top-spec WRC engine (Carless 102RON) and Ł3500 of IHI turbo, solid lifters, world rods / pistons and restrictor. As I said, single figure boost at high rpm .

Goes revs, torque (lb ft), bhp, boost
2040 : 157.2 : 61.0 : 6
2520 : 331.1 : 158.7 : 22
2990 : 475.8 : 270.5 : 36
3550 : 460.0 : 310.5 : 34
4030 : 412.9 : 316.4 : 29
4510 : 371.1 : 318.2 : 22
5020 : 334.8 : 319.5 : 18
5510 : 297.2 : 311.4 : 14
6010 : 270.5 : 309.1 : 12
6500 : 241.3 : 298.2 : 10
7030 : 215.0 : 287.4 : 9

Micky The Finn

thats off harveys computer isnt it?cannot remember which car it was in but was looking at that readout when i picked mine up.

ECU Monitor Enthusiast

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Anonymous

...but Mike...you have to say thats a reliable engine...and i'd like that in a road car with v-power 99ron the drivability would be fooking ace.....and i you could get away with near that boost on a road engine too plus the odd track because no way is anything as demanding as a rally stage imo....whats the compression 9.5-1?.....


You need no more power than that in reality for road applications!

Mike Rainbird

iTrader: (3)

Obviously .

Care to retract your 2.0 bar held comment?

Mike Rainbird

iTrader: (3)

Phil,
I've been out on the road in Harvey's old FINA Grp A car, and although the punch off the roundabouts is devastating, once on the open road the engine NOTICABLY runs out of puff, to the extent that my 343bhp / 403 lb ft T34/0.48 a/r car felt nicer to drive. The rally engines are built for low down pulling speed, for drive out of the corners. I would not want a rally engine in a road OR track car. Change the parameters to a track or short sprint car, and yes the above engine would be ideal.

Also given your current engine, don't you feel the tiniest bit hypocritical making the above comment?

ECU Monitor Enthusiast

iTrader: (1)

I know of a 2 litre YB running 32 psi and over 600 bhp dyno proven
using pump fuel and its CR 8.5:1

(NO NOS)

Still running after 2 years and used in anger most days..


There is MORE combating CR requirements than boost and fuel type.

Mike Rainbird

iTrader: (3)

I wonder what ignition it uses on the top line ?

ECU Monitor Enthusiast

iTrader: (1)

Mike its in double figures

Mike Rainbird

iTrader: (3)

You mean it's 7.0 ? . I bet it's running a 36-1 pulley and a decent ECU .

Anonymous

Mike who cares about the ignition..that car Simon refers to would be staggering.


I didnt choose the comp ratio in this car It is horrible off boost...dont get me wrong it runs sweet as but its just lethargic...still,not as bad as my 7-1 engine

I want drivability but i wont change this engine for the world as the nothing then too much is fun ...I am however tempted to buy another cossie to bung my other engine in and use as a everyday car..not sure yet

ECU Monitor Enthusiast

iTrader: (1)

Here is the map...


RPM Index left to right
500,1000,1500,2000,2500,3000,3500,4000,4500,5000,5 500,6000,6500,7000,7500,8000


BOOST Index Top to bottom(Tenths of PSI)
-150,-100,-80,-40,+0,+40,+80,+120,+160,+200,+240,+280,+320,+360,+ 400,+440


330,200,200,200,160,160,230,240,220,190,180,150,14 0,100,100,80,
320,200,200,200,200,280,230,240,220,190,180,150,14 0,100,100,80,
240,200,200,200,250,280,230,240,220,190,180,150,14 0,100,100,80,
250,250,250,250,250,250,230,240,220,190,180,150,14 0,100,100,80,
250,280,280,280,280,250,250,250,220,190,180,150,14 0,100,100,80,
250,350,310,250,250,260,250,250,230,190,180,150,14 0,100,100,80,
160,300,250,250,250,200,250,230,210,190,180,150,14 0,100,100,80,
160,300,250,250,250,250,240,220,200,190,180,150,14 0,100,100,80,
160,300,250,250,250,250,240,220,200,190,160,140,13 0,100,100,80,
160,300,300,300,300,300,260,230,220,200,190,170,15 0,100,100,80,
160,300,300,300,300,300,260,250,220,180,170,140,13 0,100,100,80,
160,300,300,300,300,300,260,250,230,190,170,150,13 0,100,100,80,
160,300,300,300,300,300,260,250,240,200,170,140,13 0,100,100,80,
170,300,300,300,300,300,260,250,240,200,180,150,13 0,100,100,80,
160,300,300,300,310,310,260,250,240,210,190,160,14 0,100,100,80,
160,300,300,300,310,310,240,240,230,210,190,170,14 0,100,100,100

Values in tenths of degrees BTDC

This map was the first rough dyno map that did a power run.

ECU Monitor Enthusiast

iTrader: (1)

No Mike, S8 actually

Oh and the values in that map are in TENTHS of degrees BTDC
using standard cosworth sensors.

Micky The Finn

nope.my comment was how it actually shows on my guage when the car is being driven by myself,i must have watched it over a thousand times,i change gear at 5,800 rpm as well.
perhaps my guage is faulty,its only a shitty stack one.

ECU Monitor Enthusiast

iTrader: (1)

Oops Just updated that map as I got the indexes wrong

Anonymous

Mike you just have to take the you ARE in the dark ages mate..there is a world outside your tuner

GARETH T

simon how rich was that running flat out? it must be alot richer than 11.5:1

impressive,, but i dont really know how its happening

leecavturbo

TF what are you saying. i can have high C/R on pump fuel and track it?
i would think tho that your ikle fiesta against my 1400kg cav is gona have less in-cylinder pressures?????? or doesn't it work like that ?

Mike Rainbird

iTrader: (3)

A shitty absolute one by any chance? .

Micky The Finn

i dont have a fiesta?

Anonymous

wriggle wriggle

leecavturbo

lol oh i thought you had that mental white fiesta thing for some reason

r5jame5

iTrader: (-1)

just have built what you want and run what you want i will stick with my low comp tho

ECU Monitor Enthusiast

iTrader: (1)

GARETH T,

Dont have a AFR map as its with the owner on his dyno sheet.

It wasnt overlly rich from what I remember.
As I said, OTHER factors make high CR possible. (Mechanical bits)

Micky The Finn

no i have an escort,here it is in macdonalds drive through mid rally!!we were hungry,markk in the background in the chase car.

GARETH T

like what? its all down the PCP's

ph mike im on your side aswell

GARETH T

very cool photo

RWD_cossie_wil

iTrader: (9)

Would you mind telling me a bit about the spec of this please? As I have high comp pistons for my engine that I'm going to build, JE forged jobbies at 8.5-1, got H section rods, std crank, and was aiming for around 550BHP?

ECU Monitor Enthusiast

iTrader: (1)

Gareth,
Its all about detonation and cylinder temperature managment.

CLUE: Pistons/Cams are far from OEM/Usual parts

ECU Monitor Enthusiast

iTrader: (1)

RWD_cossie_wil,

Post up a picture of your pistons (or describe them)

GARETH T

RWD_cossie_wil

machine the pistons oo 7.2:1 compression ,,, jack pot