Tanya said:How about underrating? Which is something that Ford is apparently good at. While the books say the engine is 95hp at the crank, how many people dyno'd their stock engines and saw (lets say 18% drivetrain loss) 77whp?
I'm not being a dick, I really want to know b/c I'm fascinated as to how removing emissions could possibly increase horsepower from 95hp to 160, unless the emissions equipped vehicle was slightly underrated from the begining. I'd be more apt to believe the US version is really around 130 crank hp, but underrated to 95 for whatever insane Ford reason. I removed my emissions crap and didn't gain jackshit from it, maybe 1 or 2hp at best.
As I previously stated, there's a 240whp 6MGE running around in AUS (race car)... I wish I could find the link to where I read that, but I can't
So no, it's not impossible at all. BMW, however, has a different technology. The Toyota M series engine is quite old actually, while BMWs inline 6s are pretty new (AFAIK) so it's almost apples and oranges.
Well, those 95/160bhp figures are indeed crank, and with that particular engine - the cylinder heads differed in the 2.8 model between the US and UK - the US had a 3 port exhaust manifold, the UK had a kind of siamesed 2-port setup but the head flowed better. Then there were different cams. I think this probably came about because the 2.8 in the US was considered an Economy engine for cars, or as a utility engine for trucks & stuff, but in the UK, it was Ford's top of the line engine for cars, so was tuned accordingly. Granada's, Sierra's etc all used it in the 'everything but the kitchen sink' options models. Also - we used a Bosch K-Jetronic MFI setup on the 2.8's, and the 2.9's had the Bosch L-Jetronic EFI w/AFM's. Cosworth even took the 2.9, changed it from 12v OHV to 24v QOHC and upped the bhp to about 195 iirc, and are easily modded for more.
The other thing that could possibly make the difference when emissions shite is removed, is that here, plenty of engines were designed and built before Catalytic converters even came into existence here (like the Ford CVH engine), so adding a restrictive emissions system effectively cripplied them, manufacturers tune them to be as good as they can get under the emissions shit, and then when someone comes along and removes it - wow, instant performance. Hell, even upto 2001, the Ford Ka was using the 1297cc OHV Kent engine that was old even in the 1970's, producing 54bhp, down from the original 1967 spec of 63bhp, mainly due to the emissions BS
More modern engines, such as the 1JZ and 2JZ that are designed with the emissions system and accompanying backpressure in mind probably wont find any benefits to removing the emissions crap, and i know that at least a few engines actually *need* the backpressure to run correctly (Rover K-Series for one....)
As for the BMW 6-cylinder engines - well, yes, the new ones are different, but the 1970's and 1980's M30 series, in 1976, the 3.0 I6 was producing 180bhp in 12v SOHC form and 9.0:1 compression ratio. Think what the 7M engine would be capable of with the advantage of 24v DOHC and higher compression ratio - already at 200bhp - so more can no way be impossible.
