RASKAR

Hey guys, I have lurked around here long enough and I am about to embark on my first engine rebuild for this car so I felt its as good a time as any to start a build thread!

So full but short back story is, I used to be a BMW guy and in college I met one of my now good friends who had a mint '90 NA at the time and he took me for a ride down some back roads at night, top down and I was hooked. I ended up buying a '95 that already had basic bolt-ons but slight rust and started doing track days.
Here is my '95 and my buddy's '90:


So long story short, I sold this car and bought the car this build thread is about; my (what was a) mint and bone stock '94 M-Edition:


As nice as it was to drive a perfect stock miata, I already had the track day bug so mods started pretty quick. My first setup was Kosei K1s, Yonaka coilovers, Harddog Hardcore, and some Recaro Profi SPGs.




Poor fitment of honda offset K1s withstanding, I think sometimes this is how I should have left the car. Stock ECU, reliable, yet still fun on track. Oh well, the power bug bites eventually, but in this case the induction noise bug bit first (thanks to my friend with a AE86 and their glorious noises), and I by chance acquired a set of these bad boys and proceeded to make stock power as unreliable as possible haha



120whp never sounded more awesome. But 120whp was getting real frustrating running advanced HPDE and the street driveability with the ITBs wasn't great for the zero HP gain haha. But before I could start to accumulate boostie parts I made the fatal mistake of parking my car in one of my friends driveways and this happened:


Said friends mom backed out of garage and straight into my rear quarter. And so started the cutting up of what was a perfectly good '94 M. Replacing the whole quarter was much more that I wanted to spend on cosmetics so why not "fix" the problem but also make it a performance improvement? F L A R E S


Flares with stock wheels for the meme:


I also found a hardtop and ended up deleting the softtop because RASKAR. I got a great deal on the top because it had flown off a car on the highway and was in terrible shape. I fixed it up best I could and it has been mostly fine since.



Okay back to F L A R E S, we can't be running big wide boi flares with 15x7s so 15x10s it is:



The car looked sick but 15x10s with 245s on bolt-on HP wasn't great. So time for the boost. Acquired one of the first Kraken kits back in 2018 and went to work.



Man was it sweet to go from 120whp to 210whp. The first time I hit 10psi to redline I was just giggling my *** off haha. I threw in a Supermiata reroute, upgraded from the Yonaka coils to Powertrix, and added this sick ebay engine damper since my 3" DP kept vibrating against my steering column on right hand turns.


I entered into my first Gridlife Track Battle with it in this state and quickly realized that, A. My 210whp miata is still slow compared to the rest of street mod, and B. stock size brakes are no longer an option. This was the result of one full day of track battle on brand new pads and rotors:


Although on a "good" note, I also managed to make my car sound like an F1 car:
Not sure how to actually embed a YouTube vid but there ya go, I some how grenaded a torsen with only 210whp. I ended up swapping to a full Mazdaspeed setup which is what is in the car right now. I also got a set of Wilwood dynalites and two piece rotors which fixed my massive brake overheating issue. I also just recently got the Wilwood 1" master and am going to do brake ducts this year.

I have been doing small upgrades and the car has been reasonably reliable the last few years but the blow-by had been slowly getting worse until my last trackday last fall I got black flagged first lap, first session for how much my car was smoking haha. I asked them if they cared and they said no, so I sent it and the car ran great all day, it just looked like a steam train.

Me and a buddy having some fun at Mid-O (Pre-Wilwood master, so brakes still iffy):
Well this is where we are at, the end result of my smokey last track day, and years of making double the factory HP on an unopened BP05:



I will post more about the progress of sourcing my spare engine and where that build is at soon, but this has already been a real long post so I shall leave you for now with some pictures of how the car sits currently, when it was running last year at least haha:

Padlock

sub'd for more ruining

RASKAR

So the plan is for the engine thats in the car to get rebuilt with forged internals for future proofing. But for now I am going to just do a refresh on this BP05 shortblock that I picked up from a buddy, as that will hopefully get the car ready to rip sooner and certainly for less money (planning a wedding currently, so hard to justify too much extra money on my toys haha). Plus in the end I will have a good spare engine should something unfortunate happen again in the future. The block came out of a running car so hopefully I can just throw some rings and bearings in it and be ready to go. My buddy was in the process of refreshing it as a spare for his car so it has new crank seals and a new VVT oil pump already too, so that should save me some money which is nice. He also threw in a BP4W head for the low low price of F R E E, but I'm sure you can see why... not sure if its fixable or not.

Doesn't look too shabby.


A little dirty and such, but not too bad right?


Well this doesn't look quite right....


So yeah. Not great, but hey, it was free.

Not planning to use this head on this block so I'm in no rush with it. I am going to go pick up a nice looking BP05 head to pair with this spare block for now, and if I can get the BP4W head fixed it will go on the forged bottom end when that happens. For now the next plan is to get this block on the stand and go drive a few hours and pick up that head.

Downmented

iTrader: (1)

The valves look like someone cut them off, free is free tho! Keep up the good work

RASKAR

Thanks! And I agree that someone seems to have cut them, I'm mostly worried about the damage to the bowl. It looks like at least one of the valves got smacked into the head and there are indents in the bowl in a few spots and one of the seats is smashed and cracked. I have never repaired a head like this before so just wasn't sure if this was fixable or trashed.

Gee Emm

I had a head with far worse damage repaired. Sold before I had a chance to use it, AFAIK it is still going - at least the buyer never reported any problems (he knew of the repair job). YMMV of course.

RASKAR

Much nicer head aquired. Honestly shouldn't require much work at all as it looks in great shape. With how nice the sealing surface looks do you guys think I should still have it skimmed or not? Going to atleast throw new valve seals in it.



Also got the block up on a stand so I can start pulling it apart. And I got sidetracked as I do and made this table so I will have a decent place to do the rebuild.


I also got tired of working with no room in the garage so the 1.6 had been relegated to the backyard for now. Makes it a bit harder when I want to drive it, but having 2 cars, 2 motorcycles, 2 bicycles, and all my tools in a 2 car garage has been a huge pain for actually getting work done.

RASKAR

Made some more progress and got the bumper off so I can start cutting up the front of the car to fit the lovely new front bar from@matrussell122. Hopefully this will be another piece to the puzzle of keeping a turbo miata cool on track. I'm also thinking I'm going to relocate the oil cooler to the passenger side wheel well like how the track dog kit is as right now I have it mounted behind the radiator.
Also has anyone else made the upper part of the core support removable? Since I'm already cutting the main part (yellow), if I also had the upper piece removable (red cuts) that would make pulling the engine super easy. Just not sure if making it bolt in/out would make the front too weak.

Also finally drained the oil which I realized I forgot to do when I went to pull the oil cooler off, and I think I found where my rings went lmao


Certainly makes me wish I had been running a magnetic plug this whole time as I only put this one in mid-last year. Next up is to get the core support actually cut and start tearing into the spare short block on my engine stand so I can get what parts I need for it ordered.

Downmented

iTrader: (1)

With regard to cutting the red area with the expectation it will make pulling the motor easier, don't forget that your radiator will be there. So unless you ALSO want to pull the radiator, it won't save you much by removing the area between the red cuts.

Stock

I've never seen someone pull a BP with the radiator in the car, is it even possible?

Downmented

iTrader: (1)

I've not pulled the radiator to pull mine out, I was unaware this was a thing folks considered necessary in order to get the motor out.

RASKAR

I also have never pulled a BP with the rad in the car, so once it comes to actually getting the engine out, nothing is bolted to that upper core support anyways. Props to you though for squeezing it out without ramming the front of your engine into the rad haha. But I have to drain the cooling system anyways to pull the engine and taking the rad out after that is just two bolts so no big deal to me for the extra room.

Stock

Interesting. My mindset is that it's not really that much additional labor to clear a fragile piece of equipment from harms way.

Downmented

iTrader: (1)

Yea, your logic is solid for sure, I just have a tendency of being a bit reckless with things I should be a bit more careful with. And sometimes my internal laziness actually ends up yielding more work. Fairly certain the only reason I was able to get it out without puling the rad was because I jacked the rear of the car way up with the front on the ground.

The lesson here is do the opposite of whatever I do, I never do things the easy way.

Stock

It's not stupid if it works.

RASKAR

Well started digging into that short-block I picked up, and have ran into a few concerns. For context, this engine build was/is intended to just be a stop gap to get the car back up and running this season and then hopefully last me a year (at least ). Once that happens I intend to build the engine that comes out of the car with all the gucci parts I can't afford to just buy all at once right now for this build. So my intentions for this engine were to just do a stock refresh, new rings, bearings, and reseal everything. This short-block already came with a new VVT oil pump on it so thats a plus. But I would like your guidance, O wise users of MT.net, on if you think I should reuse these pistons or not. This bottom end supposedly came out of a good running car, but this wear does seem a little excessive to me, but what do I know haha.


The bores seem fine to me, I can still see the crosshatching clearly.


And then on to other woes; whoever took this front crank seal off last just went to town and really gouged the **** out of the sealing surface for the front seal on the crank. Do you think if I sanded it down smooth it would keep it from leaking?


And as you can also probably somewhat see from that picture, they keyway is a bit fucked up too which was a surprise find to me on a 1.8 crank, but here we are.


So I now need to decide if these pistons are worth reusing, and same with the crank. Any advice from those of you with more miata engine building experience than I have is greatly appreciated

RASKAR

Got another set of stock pistons that look a lot better to me that the ones I pulled out of this short block. Next step is to find a local machine shop to hot tank and deck the block and head. If anyone has any recommendations of machine shops they have used in the Cleveland area let me know

RASKAR

Well I have done what all responsible miata owners do and spent money from my engine build budget and bought a 3rd miata haha. This started because I helped my buddy pick up an ITA na6 with my truck and trailer, and one thing leads to another and I bought this super clean shell he has had lying around. I don't plan to do anything to it for now as I really do want to get this car done, but it was a good deal that I didn't want to pass up on. Here is the ITA car that my buddy got a screamin' deal on:



And here is said shell that I took off his hands:



But, I didn't completely neglect the '94 in this transaction as I made a package deal with him for the shell and his 9Lives Street W A N G that he had on another one of his cars. So now at least the racecar can look sweet while it sits there broken

ehodder

I'm guessing the buddy who acquired the ITA Miata is Jacob - just met him last night, picked up a few parts to fix my car after an off-track excursion at Nelson.

That's one good looking shell you've got there - do you know its story? Also, aside from GridLife, which organizations do you run with? I moved out here last year and have mainly played with GridLife and AutoInterests.

RASKAR

Correct haha, he is a great dude. And I only know what I was told from Jacob about someone using it for body panels to fix another car that they were attached to and wanted to fix instead of just using this chassis, but thats really all I know. And same as you, I have only ran Gridlife and AutoInterest. I need to update this thread as I have the car back running again but have just been super busy with my wedding this year, which is why I didn't manage to make any track days this year at all unfortunately. But now with the car running again and winter approaching to get the car back up to snuff, I should be back out there again next year and maybe we will bump into each other at an event.