looneysaphdudey

hey i've just bought a 2ltr twin cam saph which i'm picking up on monday,

just asking some advice on things too look out for and easy ways of getting more power out of the engine,

also it says it has a xr4x4 rear diff in it ????? would that make it a stronger diff ???

all i know is its red and has a LSD

a little bit of info would be greatly recieved

regards shane

dojj

iTrader: (3)

Change the fan switch for the green one and make sure both fans work before you do anything else

They are notorious for overheating.

sierrsteve1980

iTrader: (7)

Agree with dojj he speaks sense. Ashley manifold and exhaust system made mine better. See if you can get hold of a collins chipped ecu. After that see if you can find a turbo technics kit for it.

R4N SS

iTrader: (6)

you wont get much power out of that engine.

prob best saving for a better engine to begin with.

also, where can you get chipped ecus for this engine?

johnandhissaffy

iTrader: (1)

i have 1 and mines been fine i put a switch on the dash cos when driven hard they heat up quickly and power wise all you can do without much fuss is air filter and a good old service really and imo if ya going to turbo it then i would just 24valve it instead will be much cheaper than turboing it and youll have 200+ bhp stight away witch is loads when ya only on a na

R4N SS

iTrader: (6)

now if you had a pinto in there rather than the Twink - you would have more and better tuning options.

cozmeister

iTrader: (1)

What you meant to say is "You won't get much more power out of that engine easily But you're right in as much as they weren't popular for tuning because there were plenty of Pinto and YB engines with tuning options available at the time - the poor I4 was overlooked.

The Superchips chips plug onto the expansion/diagnostic connection on the side of the ECU. Ebay's the best bet for these - not sure if Collins still produce them.

Apart from overheating from dodgy fan switches, these engines are reasonably bullet (and idiot) proof.

K&N 57i directly on the end of the inlet manifold is a good bet, and as said, the Ashley exhaust also helps add a bit of grunt.

R4N SS

iTrader: (6)

ive got an exhaust on mine but its too bloody loud - i want it a lot quieter - a nice low burble is what im ideally after, as dont want ot be like Saxo or Corsa crew where they put their foot down, cars makes a lot of noise but they're not that much farther up the road

Someone send me a link to the ECU chip - as it may mean this engine will stay in the car a bit longer otherwise i will be forced to drop the YB in there as exhaust noise is driving me mad.

møffe

its dahm easy to tune a 2,0 dohc.

but all people says buy a YB og OHC.

wonder wuy there aint any tuningparts for a dohc?

heres a dohc i made

std block with abaut 250000km still driving today, never renovated.

ported head and inlet manifold (portmatched)

272 degree regriend cams, with 11,65mm lift.

ashley manifold and exhaust.

cone filter.

std injektores,std fuelpump,std fuelpressur

a costum chip from my old GT, it smoked black in idle and smelled like benzin. so heavy owerfueled



just do the same on a pinto and try to hit the same numbers.

tabetha

Not bad numbers for the parts/work, if they are accurate, personally I'd still have a pinto over this engine any day, but then I'd have a LS6 over a YB if I had the money!!
tabetha

møffe

the numbers are wery accurate.

ill rader take a zetec over dohc and a duratec over YB.

(or lightning V8 )

looneysaphdudey

to be fair if i could afford the insurence i would just drop a cossie in but seeing as im only 20 lol thats not going to happen

and cheers moffe i'll try all that sounds relativly straight forward

and so a decent set of cam wouldn't help at all then ????

and also how easy would it be to turbo it ???

møffe

talk with the boys in here

http://forum.fordsierraclub.co.uk

the biggest priblem are the ecu.

but there are a lot of MegaSquirt upgrades now.

there are a lot to find in the head and inletmanifold

heres my head with 150hk on lastpage

http://forum.fordsierraclub.co.uk/vi...p?f=64&t=22969

look at thecrust´s projekt.

2,3 bottomend and 8valve head. think it were 168hp with wery mild cams.

dbilas.com makes up to almost 300degree cams.

looneysaphdudey

oh right cool,

got another query really

as i was driving it home it seemed very gutless but torque below 3k RPM but when it went over 3k rpm the power kicked it and accerated, like really REALLY bad turbo lag on old diesel cars ??

also the bloke i bought it off said he didn't rate the 2ltr twinky as they have a tendancy of blowing up is this true and if so what can i do to prevent this as i have a tendancy to rev quite highly as i go through the gears

cozmeister

iTrader: (1)

The twinky's built like a tonka toy - keep it oiled and cooled and it's as reliable as any other engine. The only reason they blow up is if they're not looked after!

looneysaphdudey

fair comment so it'll take some stick then ??? because i'm not known for being gentle to my cars i look after them like service them regularly and what not but i do drive them hard

R4N SS

iTrader: (6)

my twink hit the rev limited the other day while negotiating a small mini roundabout in the rain

sierrsteve1980

iTrader: (7)

All my twincams i have had always lived on the limiter, done many a tramp drift days with the last one oh and also on my private roundabout.

I habe to admit i had always been told that they are not one of the best engines but i never had one problem apart from bending an inlet valve but that was my fault. Still drove alright though.

looneysaphdudey

Lol fair enough lol mines seemed alright but not dared to find the limter yet where is the limiter set on them ? I've had mine up to 6k rpm can't be much more then that surely ?

dojj

iTrader: (3)

they have a fuel limiter which stops it fueling above 6250 rpm, but that's not to say they wont' rev beyond that, it's just that the fueling will stop working

Ade

I4 is a great engine, really strong and takes the abuse. My old red Cos lookalike drifter was a great car...

boy-racer-1

isnt the rs2000 cylinder head a good ungrade for the twin cam?

R4N SS

iTrader: (6)

I snapped the chain on mine years ago when I launched it off a set of traffic lights and held it in third until I hit the limiter but the chain snapped

sierrsteve1980

iTrader: (7)

I remember the car well ade. Do you still have the other one

chaffe

24v and a turbo is best, the dohc is a bit head gaskety
they are like massey ferguson engines thats why
Lol, thats makes it an rs2k engine then

chaffe

still laughing, thats like saying isnt the cosworth head a good upgrade for the pinto?

cozmeister

iTrader: (1)

And for the uninformed, that means...?

dojj

iTrader: (3)

when the chain snaps you need a new engine as it'll cost more in bits than a complete mint sierra will

first job on any newly bought dohc sierra, change the fan temp switch
second job, change the timing chain (i did mine, in the rain, in less than 2 hours)

looneysaphdudey

oh right cool i was talking to someone about that today and it sounded easy enough

alsooo i've spotted these on ebay ? will they fit my car and will they actually make a difference ??

http://cgi.ebay.co.uk/Ford-YB-Coswor...item415a9ccd33

dojj

iTrader: (3)

They won't do anything benificial for your car. The twinky was designed to be very efficient which is why it runs so hot and has such a low diff ratio. With a massivly upped wheel rpm ratio I've seen over 70 mpg from one of my old cars on a big motorway run, my best being a 138 mile trip using just 8.14 litres of fuel with another trip of 400 odd miles being done for around 35 litres, and it was all 70/75 mph speeds

chaffe

heavy, underpowered, everything on them is big and tractor-like, have you seen the camshaft and valves on one? definatly not an engine for making power.

cozmeister

iTrader: (1)

On an I4 yes, on a Massey Ferguson no Hence my Tonka toy comment

R4N SS

iTrader: (6)

Dojj - how do you ul the wheel ratio rpm? i want it better on fuel

dojj

iTrader: (3)

i was running a 3.14:1 diff and 215/45/17 tyres, which upped the speeds to get 40 mph out of first, 70 odd out of second and 120 out of third, 4th and 5th gears though were purely crusing gears as you really couldn't drive in them up hills on the motorway

i found that sticking an 8 x 17 rear wheel with a 45 offset filled that rear arches perfectly with those tyres and no scrubbage either

with your standard 3.92:1 diff as found on the twinkys you should be able to get a better cruise out of it

R4N SS

iTrader: (6)

ive got a 7" 4x4 diff and run 205/40/17 on the front and 215/45/17 on the rear

dojj

iTrader: (3)

24.38 mph per 1000 rpm in 5th

as opposed to 21.22 mph per 1000 rpm in fifth with the standard 195/60/14's and the twinky 3.92:1 diff assuming you've kept the same twinky mt75 box with it's 0.83:1 5th gear

mind you, if you've got the dohc 4x4 rear diff you'd only be progressing at 22.51 mph per 1000 rpm in 5th

R4N SS

iTrader: (6)

Dojj i have no idea what the hell any of that meant

its a cossie 4x4 diff, std mt75 gearbox, std engine, fucking loud exhaust

dojj

iTrader: (3)

the standard dohc 2.0 I4 engined sierra's had a 3.92:1 ratio diff fitted
the 4wd versions using the same engine also used a 3.92:1 ratio diff at the front as well as the rear, but the rear was fitted with a viscous coupling to make it an lsd
the v6 and cosworth versions used a 3.62:1 ratio diff

so with all this in mind you have to see which ratio diff you have fitted for starters

the mt75 gearbox fitted to the back of virtually all of these engines had a 0.83:1 5th gear with first being 3.89:1, second being 2.08:1, 3rd being 1.34: and 4th being your traditional 1:1 ratio with the basics being that the first number being the number or turns you'd need to get the output shaft of the box to rotate 1 full revolution

me and another fella did the research into fitting a taller 5th gear in the shape of a 0.75:1 ratio but the parts ofr this conversion weigh in at about £200 plus you need to fit them all into the box which means a rebuild at the best of times

so the worst case scenario you will have is that you've got the shortest diff fitted and standard wheels and tyres which means you will be getting 21 mph out of 5th per 1000/rpms and the best case scenario is that you will have an extra 3 mph with your mods

i'm sure a man with your skills on computery will be able to now sort out a spreadsheet showing all this stuff if i give you the 6250 max rpms of the engine and you can work out your potential top speed

R4N SS

iTrader: (6)

Cheers for the info Dojj

im just gonna live with what i have at the moment as nothing has broken so no point in changing it