I wasnt sure that was the case with the EW10 in the 206,
With XU in the Mi16 you used to get like what 15 hp extra?
Put TBs (And just TB's, No cams) on a EW10 (the 138hp one) and you end up with about 180 hp and very decent mid range torque too. 42 hp gain :O
If the XU10J4RS in my GTi-6 geos bang i might just get a EW conversion, The block is 20kg lighter too and stronger/stiffer.
Aluminium block see.
That's a new one on me then, because basically the only difference betwen carbs and throttle bodies is their basically electronically controlled and you can tune a little more precisely, I've never seen a Pug of any kind get that kind fo result simply from throttle bodies or carbs on an NA engine. Have you got any examples, as I'd be astounded. I would expect (and I'm no expert on the 206 engine btw), that on a 2.0ltr 138bhp engine you'd get around 15-20bhp on carbs and possibly around 25bhp (possibly 30bhp TOPS) with a well calibrated TB conversion... basically they're doing the same thing! However, I'll obviously be pursueded otherwise, the only reason I could see that you could get that kind of power out of that engine is if it's really restricted in the first place, i.e. poor selection of injectors (small), bad breathing...a combo of these or simply a de-tuned GTI180 engine? I can't for the life of me think what the differnece is apart from compression ratio? However, like I say, I'm not good on the 206 engine as we never modified one personally (unlike the GTi-6, Mi16, 1.4 Rallye's etc)...
On the flip side, a set of brand new TB's PLUS setup and tuning would be around £1,800-2,000k+... a set of Carbs can be had and fitted yourself for £800-1k and a rolling road tune and setup will set them perfectly. However, idling will be worse, cold starting etc... BUT still be a sweet setup.
I would expect to take a 138bhp engine to 180-200 would require, Carbs/TB conversions, Longman inlet manifold, solid lifters with fast road cam and "possibly" some head work, possibly bigger inlet valves (if that's possible on the 206)... infact it'd need it I'd have thought. Kiss good bye to some serious cash there... and then after that the manifold and exhaust would probably restrict it as well.