Rextasee

it seems like having your car rev to 3000rpm when cold wouldnt be good for your rotary engine...or any engine.... or does it make no difference?
any one got any ideas?
common sense tells me an accelerated warm up would be added stress on metal parts, or is that only too quickly cooling?
cause i just dont know.

JxT

iTrader: (7)

Just blip the gas or start it in gear and you won't have to worry about it.

Rextasee

well good or bad & why u think so
*yes i know how to cancel it... but effects? long term? no one got ideas?

arghx

iTrader: (3)

the AWS was only to pass cold-start emissions on USDM cars. JDM cars don't even have it. Most people don't consider revving all the way to 3000rpm healthy on a stone cold engine. The same applies to the FD. Mazda eliminated the AWS on the Rx-8's.

Evil Aviator

Maybe some of the regular engine builders on this forum can shed some more light on the subject, but I am not aware of any difference between an engine that went through life with AWS and one that did not. The main factors in nice-looking internals are using distilled water in the coolant mix and revving the engine past 3800rpm on a regular basis. Some engine builders (rotary and piston) have noticed decreased deposits in engines run with Castrol GTX oil.

scrip7

iTrader: (6)

In my opinion as a piston and rotary engine builder, a 3,000 rpm cold startup would be more of an issue with a piston engine in regards to engine longevity and dry startup due to the extra friction from all of the additional moving parts, especially piston rings and cam lobes. A rotary engine not only has fewer moving parts but the rotors also hold quite a bit of oil from the previous shutdown virtually eliminating dry startups. As arghx said, Mazda's intention was to get the rpms up quickly to get the cats up to a working temperature earlier for improved cold engine emissions. With that said, it's pretty much a redundant feature if you don't have cats installed. I don't have AWS on any of my 2nd gens, just the thermowax for cold fast idle. I have mine set to around 1800 rpm on a cold engine. Anything higher than that, to me, is not as much of a stress issue as it is a waste of fuel.