500+bhp yb?
27-03-2011, 09:01 PM
#1
500+bhp yb?
http://cgi.ebay.co.uk/COSWORTH-YB-DI...item3f051a0f65
i realise this a proper engine but what really makes this worth 50k?
you can build a 500bhp yb for 10?
i realise this a proper engine but what really makes this worth 50k?
you can build a 500bhp yb for 10?
27-03-2011, 09:04 PM
#2
Its no ordinary 500engine, it's a restrictor rally x engine, a lot of r an d goes into getting the best of these engines and julians are ment to be one of the best around, I think it's over priced but it is deff 30k+ minimum, at the end of the day, he has to get his money back for the development work
27-03-2011, 09:16 PM
#6
I'm sure he could do one identical for less money though to be fair!
Ps as said your paying for the development (he may have blown up 3/4 engines getting the best of them) the engine parts would be less than half of that
27-03-2011, 09:37 PM
#12
20K+ Super Poster.
iTrader: (1)
Folks, i'm being really ignorant here, Jimbo you'll be able to answer, so what's the BIG difference in a Rally X engine compared to the race engine as you put it?? 
Lol, just seen the post above....
Lol, just seen the post above....
27-03-2011, 09:58 PM
#14
Being completely honest, I don't overly know, never done one, but you have to make the engine work with the restrictor, its like a rally engine, you get to a point in the rev range where you can not run the boost to make the power. the depression post restrictor is too great to run more boost, this can break the turbo as its trying too hard to suck air through the hole basically.
If you can only run 20 psi at 7000 revs you have to work with cams and compression ratio to make the engine as efficient as possible and hold the power through the revs, other wise your going to get a midrange peaky engine and nothing up the top.
Just think of it as a rally engine on steroids they run big boost In the mid range, get 300bhp as early as possible, then as the boost tails youve got to keep that power as long as possible, its very interesting tuning a restrictor engine.
As I said I'm no pro with a rally x engine, so if anyone thinks anything different I won't argue (much)
Ps: staffi, a race engine, you get the boost in asap and hold it as far as you like so no drop of boost!
If you can only run 20 psi at 7000 revs you have to work with cams and compression ratio to make the engine as efficient as possible and hold the power through the revs, other wise your going to get a midrange peaky engine and nothing up the top.
Just think of it as a rally engine on steroids
they run big boost In the mid range, get 300bhp as early as possible, then as the boost tails youve got to keep that power as long as possible, its very interesting tuning a restrictor engine.As I said I'm no pro with a rally x engine, so if anyone thinks anything different I won't argue (much)
Ps: staffi, a race engine, you get the boost in asap and hold it as far as you like so no drop of boost!
Last edited by J1mbo; 27-03-2011 at 10:00 PM.
28-03-2011, 01:13 PM
#17
20K+ Super Poster.
iTrader: (1)
Being completely honest, I don't overly know, never done one, but you have to make the engine work with the restrictor, its like a rally engine, you get to a point in the rev range where you can not run the boost to make the power. the depression post restrictor is too great to run more boost, this can break the turbo as its trying too hard to suck air through the hole basically.
If you can only run 20 psi at 7000 revs you have to work with cams and compression ratio to make the engine as efficient as possible and hold the power through the revs, other wise your going to get a midrange peaky engine and nothing up the top.
Just think of it as a rally engine on steroids they run big boost In the mid range, get 300bhp as early as possible, then as the boost tails youve got to keep that power as long as possible, its very interesting tuning a restrictor engine.
As I said I'm no pro with a rally x engine, so if anyone thinks anything different I won't argue (much)
Ps: staffi, a race engine, you get the boost in asap and hold it as far as you like so no drop of boost!
If you can only run 20 psi at 7000 revs you have to work with cams and compression ratio to make the engine as efficient as possible and hold the power through the revs, other wise your going to get a midrange peaky engine and nothing up the top.
Just think of it as a rally engine on steroids
they run big boost In the mid range, get 300bhp as early as possible, then as the boost tails youve got to keep that power as long as possible, its very interesting tuning a restrictor engine.As I said I'm no pro with a rally x engine, so if anyone thinks anything different I won't argue (much)
Ps: staffi, a race engine, you get the boost in asap and hold it as far as you like so no drop of boost!
28-03-2011, 02:38 PM
#22
cossie fan (unluckerly)
28-03-2011, 10:55 PM
#26
Part of the Furniture
bollocks to the 500bhp! look at the torque! (920nm) wtf!!!!!! it says it has a restricted turbo on it, what would the figures be like if you were to put on a unrestricted turbo i wonder?
Thread
Thread Starter
Forum
Replies
Last Post
andy2577
Technical help Q & A
4
07-06-2014 07:19 PM