[Woody27]

you can have instances where the turbo 'boost' not only pressurises the inlet / cylinder but also bleeds through the pcv valve to pressurise the crankcase (or, on Mazda's 1.6 & 1.8L mx5 engines, the camcover) then venting to atmosphere (or wherever?) via the exhaust-side 'breather' pipe

the factory turbo engine used in the Mazda 323 had a different pcv valve to address this - all developed in ~1986...

Rich.

Just worth adding that a one way/check valve can be added in line with the PCV to prevent this and a decent metal one can be picked up cheap easily.

Just to repeat most of what's been said: With the dipstick popping you've definitely got an over pressurised crankcase, most likely piston rings (from detonation) and/or PCV allowing boost through. Pressure test as suggested will tell you about rings. You definitely want to add the check valve to the PCV regardless. I also agree and wouldn't worry about the turbo at this point.

Regarding fuelling, your RRFPR should means you could have better AFRs than you have (mid-high 12s isn't great for a car with poor cooling, a hot intake and being abused with poor airflow through the radiator aka drifting). 1.8 injectors would help move this in to the right area as a start but it's a slippery slope of sticky plasters of £50 here and there that would be better spent on an ECU and bigger injectors.

My mk1 1.6 uses a 12:1 RRFPR (same vortech but different discs) and could get in to the 11s. I also had a o2 clamp to lessen the lean tip-ins.

I now have an emanage blue piggyback on it to allow me to lengthen injection pulses alongside the 12:1 rrfpr (still on stock 1.6 injectors) and get 11.5 AFRs during boost at 0.5Bar/7psi (and more control over ignition).

Just as some guidance, I bought supra yellow injectors, spare loom, resistors etc to try to push my emanage before realising I should just bite the bullet and do it properly. I've now got a MS3 and 650cc injectors to go on which will mean I never have to worry about any of this sort of stuff again. I wish I'd done that in the first place as would've saved a lot of headaches (and 1 engine I blew up by melting piston rings) along the way! A set of Rx8 injectors and a cheap speeduino would do it for a tighter budget; I'm sure someone must have a base map that would do just as well as any other base map? (i.e. just pig rich with safe ignition).

 

[Dan_the_drifter]

You are correct in protecting your intercooler, I've seen many people end a day early smashing one off however you can definitely fab something pretty easily for the front as fitting it behind the radiator is a bit pointless, I made a bar that replaced the stock bumper bar and protects the intercooler, I will link to a video with it in.

Skip forward to 6.10 to see the bumper bar

Briefly reading through the whole post, I don't know what your budget is but messing about with it the way you are is probably not going to help your drifting especially if you are relatively new, you will be worrying about the car etc on top of trying to drift at every event. You say you are looking for 150/160hp, may as well just get a 1.8vvt lump they are nearly 150hp stock and seen a few people skid them, be miles better than your 1.6 and a lot cheaper than the turbo situation...

Don't know if you've seen my build thread but I basically bought an already turbo'd NB 1.8 for not that much more than a full turbo set up and although I've spent a lot of time tinkering on it to get it to a reasonable state to drift, it hasn't cost me a silly amount and lasted at 2 full drift days with no issues so far. What I'm trying to say is, you got 2 options really. Overlooking the oil blowby issue for a minute, once you decide if that's turbo restrictor or pcv and/or if engine is dead. You still need to either, bite the bullet and spend a grand on ecu, injectors and a proper days mapping, or, if you don't want to spend that put the car back to stock and buy a car already turbo'd and concentrate on the drifting. Or option 3 as I mentioned above, if engine is knackered just swap in a 1.8vvt lump and skid it for days! (Will still need some form of aftermarket ecu for the vvt swap too mind). Save you spending days fannying around, possibly blowing another engine up, plus not get much seat time, which to me isn't cost effective really. I live in Devon so know your pain when it comes to mapping but as @guitaristanime mentions Engine tuner will map it, don't know how good they are but either way they should get it to a safe state that you can atleast use it, rather than do 3 laps and call it a day...

That isn't supposed to come over harsh just it sounds like your main worry is the money when in hindsight you will waste more on not doing things properly and loose out on seat time, with Perran only being a 4 hr day to start with, have you been up to Smeatharpe before?

I do need to update my build thread, I've now done 2 full days drifting in it and should hopefully be doing demo's at BHP this weekend coming so they definitely will take the abuse if set up correctly.

Edit: Re-written properly as blabbered a bit.

 

[Shadowraven]

A grand for Ecu, injectors and a tune, wish it were that cheap !

 

[guitaristanime]

Good to hear from you @Dan_the_drifter nice to see the project is seeing track time
My VVT swapped NA one has gone off for a dyno print out today, long story, but it's basically finished!

 

[DudeWhatsMyCar]

hey ive only briefly read through but a lot of the issue seems to be from the trigger wheel set up you have. An imprecisely modified trigger wheel would be very inaccurate and prone to improper timing. The ecu needs the reliably know where everything is in relation to the trigger wheel. Megasquirt has a good selection of pnp ecus for the nb. Also this is a good article to check out. The EFI Tuners Guide Chapter 3 - Garbage In, Garbage Out: The Three Stages of Success its got a lot of great information about installation configuration and tuning.

 

[Slicks]

Hi Folks - bit of an update to this. Ended up swapping in a stock 1.6 and selling the Greddy kit complete as a ring had gone in the turbo experiment engine. I also chopped the MX5 up into a rough approximation of Hoonigans Shartkart at the same time. Having run a couple of days like this Im back to wanting more power. I've found a complete 1.8 turbo car that's rotten but has a MS3 and is already up and running as a complete turbo install, so will be dropping that lot in soonish. My drift MX5 was/is pretty crusty underneath, and wasnt really worth saving hence the chopping!