Soooooo..... My build has just taken a sideways step.

Just bought a forged and sleeved 2zz engine, needs high comp pistons swapping out for 8:8.1's.

But selling my rods and pistons, plus the forged 12:1's in the 2zz should way more than recover the cost.

2zz turbo here we come!!

What was it @shnazzle was saying about members chasing power. Guilty as charged. 😂

Good luck to you.
Plenty of power.
Now where did all my torque go?

Quote from: 1979scotte on September  9, 2020, 19:43Good luck to you.
Plenty of power.
Now where did all my torque go?

Haha all the torque went in trying to save the gearbox.

If it goes anything like the turbo'd 2zz elise did last time I was at Blyton I'll be a happy bunny!

It will go well I am sure.

So back from my 6 hour round trip to pick up the forged and sleeved 2zz block.

It was a bit of a gamble as the engine was in bits and couldn't hear it running or anything.

Back home, head inspected there was some small witness marks from where it had a spark plug barb come off.

This was also evident on the piston on the same cylinder, no doubt would run again but there coming out anyway.

Now onto the block cranks over smoothly, a check of the bores all within factory specs and all within 0.01mm of each other.

So the main thing, I wanted the block for is OK! Few!

Valves have all been cleaned up, looked like it had ran mega lean on two cylinders as the exhaust valves where heavily chalked up. All ground away with the dremel on a small wire wheel.

Leak test done on valves, all good after 2 hours.

Next step, engine stand and crank and rods out to check for stretch and tolerance.

Then old pistons up for sale and new lower ratio ones to go in.

Phew sounds like you got lucky there that block is ok, ive come to conclusion that 99% of engine stuff thats for sale these days has issues!

Oh and what you doing with those rods you had for 1zz ?   i might need some as DPD looks to of lost the pistons and rods i sent for modification

Rods and pistons will be coming up for sale as soon as I've got some pictures sorted.

Engine also came with stage 2 cams which I will probably end up putting on some lotus forums to move on.

Luckily my turbo manifold is 1zz and 2zz compatible.

I'll get it running using the 1zz pfc then have a trip down to RRR engineering for an ecu master black for a hi and lo boost setting.

I'll be looking for 400hp pkusnon hi boost, I've got an auris 2.2d gearbox winging it's way over too to see hwo it mounts up.

New oil squirters order, I plan to space them out after reading a few forums on standard sqyiterwvs wiseco pistons!

Some more research on the engine I bought, original owner suspected a spun bearing.

So I'll take the cr ak out and check tolerance to double check.

Hmmmm


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Crank actually turned smoothly by hand....

Cylinder 3 and 4 both had scored skirts on one side, which has ever so slightly scored the Bores low down.

Luckily its sleeved so nothing a re-bore and hone can't sort. And luckily I hadn't ordered standard size pistons!

Thats nasty hope you didnt pay much for it!   what were the cams and caps like ?

Quote from: thetyrant on September 19, 2020, 10:43Thats nasty hope you didnt pay much for it!   what were the cams and caps like ?

Cams and caps are fine, rods still look like new.

Crank is also fine.

Stipped down the oil pump and also looks like new.

I paid less that what it was going to cost me to sleeve my 1zz, took a gamble and worst case it was just the block that would be good.

So paid off, luckily!

Some more parts ordered.

To ensure the block has pistons for when it goes off to the machine shop for the light scoring taking out.

I've aired on the side of caution and gone with 82.5mm wiseco pistons from MWR.

These will give me the ability to go 0.5mm overbore, should my dial bore gauge and micrometer not be as accuroas the shops.

Knowing my luck I'd have bought std 82mm and it would have needed a rebore!

So thought for another $100 and a couple of £100 for a rebore it was worth it to play it safe.

Just been notified that my pistons are in the country.

Machine shop booked for two weeks time.

Engine spec so far is looking like:

Darton Sleeved 2zz Block bored to 82.5mm
MWR Rods
Wiseco 8.8:1 82.5mm pistons
MWR valves
MWR Valve Springs
Seven Motor Sport Stage 2 Cams
Circuitworx Oil Pump
ARP fasteners head and block.

My turbo manifold can be used on a 1zz or 2zz.

Unsure of turbo to use, will most likely stick with my TD04 but with a 19t wheel to start.

Then will look into Holset (several close friends work in the R&D department there) possible a hx35.

Will have a 3" exhaust.

630cc injectors still, but will RRFPR with a return.

ECU will go to ECU Master EMU Black.

Coming along nicely by the sounds of it

Let me know when your selling pfc I might give it a try as not one I've tinkered with before.

Always fancied a borg Warner efr myself know nothing about holset turbos.

Good news that its all coming together

Quote from: thetyrant on September 24, 2020, 19:45Coming along nicely by the sounds of it

Let me know when your selling pfc I might give it a try as not one I've tinkered with before.

Will do! And yes finally!

Quote from: 1979scotte on September 24, 2020, 19:47Always fancied a borg Warner efr myself know nothing about holset turbos.

Good news that its all coming together

Borgs do seem to be well regarded.

Holsets and Cummins both made in Huddersfield Although most are for great big industrial diesel applications!

Quote from: Gaz2405 on September 24, 2020, 20:06

Quote from: 1979scotte on September 24, 2020, 19:47Always fancied a borg Warner efr myself know nothing about holset turbos.

Good news that its all coming together

Borgs do seem to be well regarded.

Holsets and Cummins both made in Huddersfield Although most are for great big industrial diesel applications!

Educating

I was 'allowed'some time on the car this afternoon.....

So set about having a trial fit of my Bofi Racing tyre rack.

This should enable those who track their twos to take spare wheels and tyres with them.

https://bofiracing.co.uk/skidnation-tyre-rack-mazda-mx-engineinwrongplace -na/

All in all bolted up pretty straight away.

One hole to elongate and another new hole between the two already there.


The bars that come with it are too short but nothing a bit of box section from work can't fix.

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Some video mumblings about my build.

Block, crank, rods and pistons dropped off at the machine shop this morning.

Block in for an overbore for the 82.5mm pistons.

Crank in for a a tolerance check and polish.

Rods in for tolerance check.

Potentially bad news back from the machine shops, sleeves maybe loose.

I'm popping in next week to look at solutions, they're up for custom sleeves by the sounds of it.

Oh no thats a bugger!

Sooooo been to the machine shop to pick up my block and see what the damage is.

They managed to bore out to 82.5mm ok, but whilst honing the machinist noticed there was some movement in one of the sleeves.

Upon closer inspection we found the block had cracked between cylinder 3-4.

Not good! So block is scrap!

Good news is crank is fine as are rods.

So back home, I managed to tap the other sleeves out (which to me means they either weren't fitted to tolerance to start with or the lack of material between cylinders can cause this cracking. (I've looked online and can't  find any evidence.





So all in all not ideal!

Now undecided as to which avenue to go down.

1. Look for another block, machine shop are happy to install westwood cylinder liners and a dowel block style guard as they do on their evo engines which make 1000hp plus.

Pro's: It can be a scrap high mileage block, as I've got a built head. Should give 400hp plus comfortably, but then get into transmission issues.
Con's: Transmission issues and finding another block.

2. Find a another 2zz block and go standard bore (which would mean new pistons)

Pros: Still uses built head, stock crank and forged rods.
Cons: Would mean new pistons and difficulty finding a low mileage block with a good MMC coating still.

3. Get them to sleeve by 1zz block and use my 82mm pistons I still have, (this would mean new rods, as I've just sold my others!)

Pros: I have 3 block to choose from! I can still overbore to 82mm with westwood cylinder liners. All supporting mods already done.
Cons: End power figure may be lower than the 2zz due to head restrictions. Transmission issues.


4.Just throw caution to the wind and K24 Turbo as more and more mounting kits are popping up now.

Pros: Plenty of tuning options, good unbuilt power.
Cons: Completely starting over again, looking at a good £4-5k just to get up and running minimum.

I think I need to have a think and see what's out there. It's no doubt going to be a long crappy winter.