M45 hotside on 1.8 Mk1, steps onward?

[iguana]

So just the charger slapped on is in region of 170 oddbhp? whats the trodden path for more reliable trackday use power beyond that? & to what total power area without spending silly $

Guessing aftermarket management, IC, bigger injectors.

Smaller pulley a good idea, or too much stress on the sc?

M45 won't be able to match M62 power levels tho I'm assuming?

Not after big headline number powerwise but reliablity for track frollics.

Cheers.

[MX-5 Lazza]

For a track mk1 then a reliable 170-200 bhp is probably your target.
MP62 will make the power easier than an M45 but both are capable in that range.

I'd budget for at least an eManage blue and 320cc injectors just to make sure it's safe as you will be at high revs for most of the time. An M45 would probably need an ic over about 180bhp.

You can increase boost by swapping crank pulley - no need to touch the charger pulley. To get 200bhp from an M45 you will be spinning it about as fast as it will happily go. Faster is possible (I've seen people get 220bhp+ from an M45) but for a track car it probably wouldn't be a good idea. An MP62 has enough headroom to not worry about spin-speed - 300bhp+ is possible so 200bhp is no problem.

Always remember this:
Cheap - Reliable - Powerful. You can choose only 2.

[OnlyMX5ives]

Std JRSC should be around 180bhp really.

The 1.8 generally doesn't hit 6psi as std so a smaller pully makes more sense.

EMB is cost effective(ish) ONLY IF YOU CAN TUNE IT YOURSELF otherwise stick with a powercard.

With a tracked overspun M45 an IC (or water injection) as well as a knocklite is worthwhile.

However add that lot together and you're looking at around £700 for maybe 20bhp.

If you search, DIY W Inj and a small pulley could be done for £100 and give much the same result.

[iguana]

Cheers fellas.

[iguana]

Ok did the deal on a Mk1 Mazdaspeed spec B 1.8, so according to the blurb & the only bit of english in it all! is = 180 ps

Whats the management on this? is a powercard thingy needed or is the mazdaspeed package already a modded ecu? *

To take this forward same steps as above, or does it already have some bits as stock? (doesnt have an intercooler)

• - translated form Jap doesnt make it too clear!

Feature of knock control unit product To “the degree of 2~20”, retarded angle it does ignition timing automatically with the knock, protecting the engine without excessive power loss. In each every cylinder it is fine in independence control. The thing releasing where it prevents the erroneous operation with the knock when departing, starts and becomes the [zu] and others [ku].


Cheers.

Edited by iguana on Friday 22 January 21:01

[MX-5 Lazza]

That was a factory modified car so I would expect it to have everything it needs as long as it hasn't been modified. It might be worth getting it along to a dyno so they can check the fuelling and make sure there is no detonation - that should give you peace of mind (and a dyno-graph ). Shouldn't cost more than about £40.

iguana said:

Feature of knock control unit product To “the degree of 2~20”, retarded angle it does ignition timing automatically with the knock, protecting the engine without excessive power loss. In each every cylinder it is fine in independence control. The thing releasing where it prevents the erroneous operation with the knock when departing, starts and becomes the [zu] and others [ku].

That sounds like a description of a J&S Ultrasafeguard. I wonder if Mazdaspeed fitted something like that so they could maximise the timing...

[OnlyMX5ives]

The joy of old Jap cars is only god knows what they have on them as most aren't as they left the factory.

I have heard of Mazdaspeed cars having modified ECUs but all the ones I've seen have maybe 150bhp and are running lean.

Quick dyno should prove it.

Most only have a resistor or an AFPR.

I tend to fit a Bipes and a Powercard for a 100% improvement.

Edited by OnlyMX5ives on Saturday 23 January 10:55