Car appreciation... the aesthetics, the engineering, etc

And replace with a catch can?

Exhaust gas recirculation should be fine to be blanked off, if it's present - it's an emissions control measure.

Secondary air injection is there to make the cats fire off sooner, so again - the only thing that takes a hit is (initial) emissions performance.

I've considered a catch can for the oil breather instead of routing it back into the intake tract but it the tradeoff in added complexity wasn't worth the (small) performance gain for me.

The SAI system on this engine is so clearly an afterthought, as an engineer I hate it.

Can you bin it without the management system throwing a wobbly?

Looking now, if RCM make the bits I'm usually confident.

Well, there's certainly one way to find out.

Can anyone recommend a good place to get a puncture fixed (alloy wheel might need refurbishing as I can’t find any debris) in South London?

Is Mad House tyres on OKR any Good?

Fill with slime, worry about it when it comes to a tyre change.

Deffo do that. Although no idea how that works on a flat 4 - more complex I imagine. But you really don't want oil vapour in the intake. More critical on direct injection cars though.

Why not go aftermarket engine management?

I'm not going full race car on this, I just want to remove anything that I can get away with, less little vacuum pipes to fail and less oil in my intake.

I'll be fitting a Walbro 255 and a 3 port boost solenoid, already got a full turbo back exhaust / sports cat, so just need it mapped to make the most of the exhaust and up the boost a touch.

Fewer pipes, less oil.

Sorry.

you're not sorry

Sorry, English isn't my first language...

I'm Scottish.

Is it possible to increase a car's power by changing any part of the exhaust without increasing the loudness?

Basically my catback is too loud for my tastes and if I upgrade the headers or cat to aftermarket parts too things are just going to get louder right?

Put a potato in the tip....

Then it will certainly chip?

.

Less restrictions equals higher volume, typically- and things like manifolds can change the character and tone quite a lot. Is it the volume you don't like or the noise itself?

I don't know how much room you have under a MX5 but you may be able to fit additional/larger boxes to absorb some of the volume.

It's the volume I don't like, the tone is nice just a bit too loud. I did contact a local Power Flow center and they said it's always going to be loud due to the "large bore diameter", but adding a silencer could take the edge off for £180.

Being stainless swapping it for a quieter one will most likely be mild steel and cutting into my current one will make it very unattractive if I decide to sell it. There's a trolley jack and axle stand shape object under the tree so may investigate properly soon. Think I need a OE diameter exhaust but in stainless if such a thing exists.

Is that the system you have fitted in the link?
You might find a contributor to volume is the 90mm tail pipe off the back of the 57mm system. You could try fitting a smaller bore tailpipe, or putting a sleeve inside it as a test

Yes that's the one. Good point will try a bit of experimenting with the tail pipe to see if it makes a difference. Cheers

euph?

Stainless sounds different to mildsteel.

Add a silencer
https://www.demon-tweeks.co.uk/performance/universal-exhaust-silencers/custom-chrome-racing-stainless-steel-cherry-bomb-silencer