Hi all, anybody have a link or know the differences between the two, i know the blocks are stronger, but im just wondering about CR, heads ported, what cams they use that sort of stuff

any help ta

 

god on second page already

 

http://www.rs-500.com/

some info there

 

Internally they are exactly the same, whether it be cams, pistons, valves, crank, rods etc its the bolt ons that make the difference and the thicker walled block

 

A.K.A.

WRONG ,,,

 

give examples then as to how I am wrong in order to help the thread poster

identical parts between 2wd and RS500 engine are:-

Pistons
Rods
Crankshaft
Front Crank Cover
Head Gasket
Big ends and Mains
Bearing Caps
Valves
Cams
Cam Caps
Hydraulic tappets
Combustion Chamber volume
Cam Cover
Cambelt
Cambelt cover
Injectors
Coil
Leads
Inlet trumpets - Rs500 version was slightly machined at the mouth about 5mm in after casting and had two dowl holes drilled into it but casting is the same
Exhaust Manifold
Flywheel and clutch
Crank Pulley
Sump
Distributor
Engine arms and mounts
Modine
Breather set up
Idle speed control valve
throttle position sensor
crank sensor
all pulleys
map sensor
amal valve

The only different parts were :-

block - but internally the same - and could be swapped for a normal 205 and still work fine at normal outputs
turbo
Plenum outer body to accept further 4 injectors and throttle body
Upper fuel rail to allow extra take off point to the extra injectors
Fuel regulator - to allow twin inlets
3 bolt mounting point for the revised thermostat housing - other than that the casting is as per 2wd
water pump
bracket for the revised location of the amal valve
turbo damper
and a few minor odds and ends like air filter top, L1 ecu slightly modded etc

All first hand fact not pub talk - I have personally stripped and rebuilt every version of the YB engine inc RS500, only one I have still to play with is an EECV late escort spec one

To give you an idea of similarity you could take out the engine with all bolt ons fitted from a 3dr Cosworth and an RS500 swap them over refit them in the different shells - plug the looms back into the connectors and they would fire up and run fine in the wrong car

I am a Consultant Quantity Surveyor with no business connection to Cosworths at all so lets see if the "experts" know more than me

 

Hehe go for it Aka.

 

That's gotta hurt paul if he is right

 

pretty sure the oil pump is different too

 

 

the 3 door engine is different to the 2wd sapph engines !

 

it is

 

it is so is the water pump and thermostat housing

 

spot on - but similar to a 4x4 one

I rattled that list off from the top of my head so missed a few things.

Turbosystems - the only difference I believe is that the later 2wd saffs had a 3 bolt thermostat head but the early ones were the same as the 3dr but all 2wd used the 2wd thermo housing regardless

I was also told that the 500 odd engines that were pulled out of the 3drs when they were converted to 500 spec were re-used in the 2wd saffs at the start of production

Happy to be proved wrong though

 

He`s pretty damn close.......

Oil pump and spraybar are different(for better oil spray under pistons)
Thermostat housing is a one off(Quite similar to 4x4 but not the same)

 

Its not hurting

He says they are the same

Oil pump is also a one off in a 500 ,,as said above

any more i wonder

 

Don`t the 500`s run a baffled sump too?

 

The RS-500 exhaust manifold is sleeved down in size..............well, they do according to this:



From this book:

 

it isnt mate

 

thats the downpipe not the manifold =- all ford did was weld a washer in it to try to control the back pressure from the T4

 

AKA, I was only going by what I've read (see the edited post above)...........But if Pete RS Specialist says that manifolds are not sleeved, then I am inclined to believe him.

 

did I say there wasnt sleeved ?? I dont think so as they are

 

down pipe was sleeved,not manifold,

someones going to say the head was different as well arent they.

 

Yes the head has one little diferance

 

I thank you sir

Going back to the start, essentially they are the same animal, parts from an RS500 engine can be replaced with the equivalent 2wd component and vice versa.

 

The post didnt ask if you could change the engines over without any mods ( altho you can ) it asked if there was any diferances and there is quite a few

 

but what i don't understand is..............

only joking, just id been offered a bare engine and wondered if they were worth anymore than a standard 2wd engine

 

Pete
they are worth a lot more than a std engine ,,about an extra 1k is a rough guide

 

Frt cast turbo damper lug area wasted away?