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philip2	posted on 13th Jan 11 at 17:35
	tbs are better mid range compared to carbs but generally both give same peak power. all depends what your doing, dont half the clet rods, pistons, valve springs, caps, etc interchange between the two anyway?
Warren G	posted on 13th Jan 11 at 17:32
	its like the whole carb's vs Throttle bodies tb's are so much better
Daveskater	posted on 13th Jan 11 at 17:31
	:cool:
DaveyLC	posted on 13th Jan 11 at 17:28
	quote: Originally posted by Daveskater Surely the mk4 will weigh more though?
Daveskater	posted on 13th Jan 11 at 17:27
	Surely the mk4 will weigh more though? Also depends on the driver's weight, driving style and roads driven. [Edited on 13-01-2011 by Daveskater]
sbermingham91	posted on 13th Jan 11 at 17:24
	quote: Originally posted by Warren G how can you say that? why rebuild it? standard clet vs standard zleh will be quicker :/ no there full of sensors so make the engine more efficent because these engines get the shit ragged out of them, if they're not rebuilt then theres bound to be problems with them. I used to have a astra gsi turbo, z20 let, my mate had a mk3 astra gsi, with c20let, the mk3 was faster, and more efficient on fuel, he could see 35/40mpg sometimes, whereas I would struggle to get 33/34mpg. old skool rules. FACT :thumbs:
Warren G	posted on 13th Jan 11 at 17:13
	quote: Originally posted by corsagsigav so if you put a Z20LEH into say a corsa b and have something like a gotec pro ecu it would be better.as dont the \Z20LEH have better oil ways or something oil spray jets, forge pistons and other bits and bobs
Warren G	posted on 13th Jan 11 at 17:12
	quote: Originally posted by sbermingham91 you could say that, but if you can get a good C20LET, recently rebuilt etc, it would whoop the arse off a Z20LET/H the newer ecotecs are pretty pants compared to the old skool stuff, less to go wrong in them. ecotecs are all full of poopy sensors! how can you say that? why rebuild it? standard clet vs standard zleh will be quicker :/ no there full of sensors so make the engine more efficent
corsagsigav	posted on 13th Jan 11 at 17:11
	so if you put a Z20LEH into say a corsa b and have something like a gotec pro ecu it would be better.as dont the \Z20LEH have better oil ways or something
DaveyLC	posted on 13th Jan 11 at 17:06
	Actually the Z20LEH/T is a much better block than the C20LET. Its only the engine management that is the bottle neck.
sbermingham91	posted on 13th Jan 11 at 17:02
	you could say that, but if you can get a good C20LET, recently rebuilt etc, it would whoop the arse off a Z20LET/H the newer ecotecs are pretty pants compared to the old skool stuff, less to go wrong in them. ecotecs are all full of poopy sensors!
corsagsigav	posted on 13th Jan 11 at 16:44
	right so does that make the Z20LET more efficient as it is a ecotec effectively and is lighter due to it been newer :o
DaveyLC	posted on 13th Jan 11 at 16:30
	Z20LEH is low compression version of the X20XEV girdled bottom end with a Y22XE head with sodium filled valves. The C20LET is the old pre ecotec engine same basic block and head as a C20XE and similar block to C20NE.
corsagsigav	posted on 13th Jan 11 at 16:19
	can anybody tell me more about the differences between the 2 engines other than power wise