Engine Blocks

[tk421]

[quote="Sean
It's a common misconception that a leaner car will more easily pass emissions. in many cases less fuel (ie leaner) will HURT emissions.

Take a factory car, most run fairly rich from standard and pass the test, I'm assuming you're only required to pass the IM240 test?[/quote]

Can't comment on the rest but totally agree there. Lean increases Nitrous oxide, just as bad as HC.

You need a happy medium on AFR and a really good new CAT to get the result from what I have been told.

If your still going to run your full ecu I don't know how you would get away without a 'post' emissions test of some sort. Remember the SE will be subject to a much lower allowable HC number as well.

[Sean]

Fresh oil will help, as will a spot on ignition system, one misfire and you're done for.

[Fuzzlet]

Since the turbo, manifold and dump-pipe are off an SP (well, were bought brand new but manifold is genuine mazda), I will be using the block from my current engine, but it will be engineered as an SP engine in an SP, and an emissions test will not be required, because all emissions control equipment will be retained. The engineer I have spoked to is happy to sign off on it, provided he can inspect the engine before its put back into the car, so it wont be a problem

[Sean]

Since the turbo, manifold and dump-pipe are off an SP (well, were bought brand new but manifold is genuine mazda), I will be using the block from my current engine, but it will be engineered as an SP engine in an SP, and an emissions test will not be required, because all emissions control equipment will be retained. The engineer I have spoked to is happy to sign off on it, provided he can inspect the engine before its put back into the car, so it wont be a problem

Fair enough, ifhe signs it off it's half his problem (if it isn't right) PM me the engineer if you like and I'll let you know if you should be looking elsewhere, there are a few who the RTA is cracking down on and they require an inspection of the car even with engineer approval. I learnt the hard way and ended up in engineering/RTA limbo for a few months as a result. Sorry to sound like a constant downer, I just kjnow the frusration that comes as a result of shonky engineers...

Took me ages to get mine all approved and above board.