The small welsh plug big number 205 block was developed for the RS500, it is basically identical to a 200 block, it also has the same cooling system upgrades as the 4x4 200 engines, except in the head. The difference in these blocks is in the casting from approx 2 inch down the bore, the bores step out to provide the material to avoid split bores under high boost and provide the means to long stud.

A small plug 205 or 200 block is completely un-necessary for a N/A pinto or YB for that matter.

Hi guys, Ok all i want to do is build a bullet prove motor that will rev to 8 to 9 thousand revs and wont fall to bits, And a standard pinto block can not handle this so iv been told, so what's the answer, can someone set me straight on this matter. I just do not want any twist in the bottom end of the motor,Have been told that a 205 block is the answer.

I will start of by stating, I am no expert in engine building and someone like Danny or some of the other racing guys here who build and get built their racing engines will know from experience -

The Pinto cyl block is not a known weak point (except splitting bores with big boost on turbo engines), but it is the crank, rods, rod bolts and pistons that limit revs to 7,000 - to 7,500 from general consensus. Use a GOOD quality steel crank, GOOD quality rods and GOOD quality pistons, and providing your head/cam can pump enough in, your tolerances are suitable, the machining work is top notch, then the engine SHOULD be able to cope. To get an engine to be reliable at these revs though is a big $$$ exercise and not for the faint hearted or light of wallet. You should not need to re-invent the wheel as it has been done before, but you NEED to find someone who has done one, learen't from their mistakes, is willing to share their experience with you (this did most likley cost them $$$), and not those who supposedly know, but spout BS and will cost you $$$....

You NEED to be very clear on this before you start, and do ALOT of research too, as unless you have lots of $$$, and time to experiment and experience the failures along the way. People like Wozza and Danny who have been there and done it; are people to listen to.Those who have only been into Escorts for a year or so, keep blowing (standard) things up and asking stupid questions like what tolerances to use for valve clearances, but still proffer suggestions as to how to build a 9,000prm engine are people to NOT listen to.. (without naming any people specifically) - There is a lot of bad / rubbish advice out there that is just plain wrong - so choose carefully.... (we have all been got, but try to make sure it is not something really expensive....)

Just a couple of rambling thoughs on a crappy weather Sunday morning.......

Hey nic thanks for the advice,And you are right in what you say.My engine builder has build motors for 30 plus years and can only listen to his advice.And he is the one that wants me to buy a 205 block,as you have to start with a strong block and the 205 block seems to be the answer,all the rest of the goodies i know i have to do anyway.It is bit of an over kill, but these revs are reachable.but are still looking for a block, if no luck here in aust will have to ring some one like burtons. But thanks for the input,and Sunday was poo pooy weather ,i was racing at sandown...

If your chasing those type of revs be prepared to pay lots of money for little return. you'll definitely need to dry sump and you'll probably be losing power in the upper rev ranges, If you speak to most engine builders they'll tell you 7-7500 is plenty cause you'll want to change gears when HP is at its peak. Look at alot of super cars eg: Porsche GT2's they don't rev high and have 300KW plus at their disposal.

Lincoln give the guy my number and I'll explain it as I can't be bothered answering this question for the umpteenth time on this forun and others then have stupid comments from ill informed internet guru's who have no real experience with the engines

Danny

Did you listen to Danny?