robmarriott

This will sound odd but bear with me on it.

I want to build an NA Cosworth engine but I want it to look good as well as performing well

Using a Pinto block, what is needed to use a YB head?
Can I use any head or is one more suited to NA work?
If I use an early head (with the original style cam cover) can I use a small turbo escort cam cover? If it doesn't bolt straight on, what do I need to do to get it to work?

I think that's it for now...

martysmartie

iTrader: (1)

It's pretty expensive to go down the N/A route, YB is merely based on a Pinto, the early YBB engine used exactly the same "Selected" block hand picked from the Transit production line, essentially just blocks with tighter bore tolerances, this becomes irrelevant anyway once rebored.

Therefore the head will obviously bolt straight on, not sure about the ST cam cover though...

Martin

robmarriott

I'm not looking for big power from it, even 180bhp would do.

It's more for the look than anything, the Pinto is ugly. The small turbo engine looks great IMO.

I plan on running it on a plenum too, probably a mountune style inlet as it looks neater.

So basically, any 2.0 pinto block, change the pistons to suit the 16v head and we're away....?

martysmartie

iTrader: (1)

The YB is lower compression as it's turbocharged, I don't know whats involved, I do know is the YB is expensive N/A, before the YB that we know the engine started off with the head and was designated YA, so maybe you could have a similar setup to that?

Also is it going to be on carbs, bodies etc?

Martin

martysmartie

iTrader: (1)

The YB is lower compression as it's turbocharged so yes the pistons are different and forged as well, I don't know whats involved, I do know is the YB is expensive N/A, before the YB that we know the engine started off with the head and was designated YA, so maybe you could have a similar setup to that?

Also is it going to be on carbs, bodies etc?

Martin

robmarriott

I know the YB is low comp but pistons are available for NA builds which bump it up a lot.

I'd run it with a swedish style inlet with a single throttle body, nice exhaust manifold and everything hidden away to neaten it all up.

I know it's an expensive engine to get a lot of power out of NA, but I don't see 180bhp on a 16v 2 litre as being that much work, especialy not with the quality of the YB head, there's room for massive ports on it.

boy-racer-1

i dont think a swedish inlet plenum will do for na form as im guessing its designed for forced induction otherwise im sure you would see more swedish plenums on na cosworth engines, you will need twin 45's at the minimum as an inlet, the small turbo rocker cover wont fit the cylinder heads that use the old style rocker cover, and to make that fit requires ally welding and then drilling for new bolt holes to be made which i imagine will be more expensive then buying a small turbo head unless you know someone who will do it on the cheap, hence why i just went and bought a small turbo head, dont make the mistake by thinking a highly skimmed cylinder head will help in the na process either as the valves get too close to the edge and the engine will run like crap due to leaks etc in the valve seatings and be of no good, and to get 180bhp out of a cosworth na form isnt easy atall, i was originally going to do a cosworth in na form and then looked at the money involved to achieve just around the 160bhp mark and it was rediculously stupid when you could go and buy a 2.0l zetec add some performance parts and be running 200bhp for less then £300, but if your not bothered about power and just want the engine running with a twin cam and looking good in there which says cosworth then just change the pistons the na ones or use the standard 2.0l pinto ones and hope valves dont hit, wack a na inlet cam in put whatever inlet manifold on and just drive it cheap and easy, it will run it will be quiet it will look good but a saxo will still go flying past you despite your engine having cosworth written on the top as i imagine you will still only get just over 120bhp if that, look into some of the people who have done na conversions and reaching 230bhp how much money they spend and how loud/rough running the engine sounds because you need solid lifters for you to get the power out of them, having said that people have still had 300bhp out of them in na form with stroker kits etc