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-   -   Another build thread (http://www.haynes.co.uk/forums/showthread.php?t=5830)

flyerncle 7th February 2014 07:05 PM
How hard can it be ? :eek: Rotor in a petrol turns at 120,000 revs or there abouts and exhaust turbine temp is hot enough to melt glass and there is the added problem of passing oil through the bearing,ask me how I know,just rebuilt an engine and after carefull check on the bench of turbo that looked ok and oil pressure from new pump blew it.

If you placed an intercooler on the pressure side it will not pass bits into the engine.;)

K4KEV 12th February 2014 11:09 AM
Dont know if this will be any good to you but it is mx5 1.6

http://www.driftworks.com/forum/part...-manifold.html

skov 12th February 2014 12:59 PM
Quote:
Originally Posted by K4KEV (Post 95773)
Dont know if this will be any good to you but it is mx5 1.6

http://www.driftworks.com/forum/part...-manifold.html
Thanks Kev - that is the sort of thing I need.
In fact it looks very similar to (but much shinier than) the monstrosity I've been knocking up with a scrap manifold and tubing :D

skov 15th February 2014 10:56 AM
Mostly for Chris, who I know is interested in my engine management plans :)

Here's a sneak peek into my current scheme:

CTWV50 16th February 2014 07:15 PM
Quote:
Originally Posted by skov (Post 95800)
Mostly for Chris, who I know is interested in my engine management plans :)

Here's a sneak peek into my current scheme:
Haha! You making your own engine management then! Smart Ass!:D

I'm impressed!:)

skov 17th February 2014 09:03 AM
Quote:
Originally Posted by CTWV50 (Post 95817)
Haha! You making your own engine management then! Smart Ass!:D

I'm impressed!:)
I wouldn't be too impressed just yet, I've still got a long way before it's finished and working!

It's not quite my own engine management. I did start designing my own ECU from scratch, but then decided to cheat a bit...
The idea is that this board replaces the processor in the Mazda ECU, so I can run my own engine management software on it and make it fully tunable :D

james3004 17th February 2014 01:23 PM
Have you got the engine rebuilt and in yet?;)

skov 17th February 2014 01:41 PM
Quote:
Originally Posted by james3004 (Post 95831)
Have you got the engine rebuilt and in yet?;)
If only! Still waiting for the ****** piston rings.
Can't do much until they turn up :rolleyes:

Do you need your crane back yet?

james3004 17th February 2014 03:13 PM
That's not so good! Will need it in a couple of weeks if I can borrow it back for a bit;)

Stot 17th February 2014 06:53 PM
Quote:
Originally Posted by skov (Post 95827)
The idea is that this board replaces the processor in the Mazda ECU, so I can run my own engine management software on it and make it fully tunable :D
Thats what it looked like to me, the B6 Brain Surgery bit gives it away... Is it ARM based? Will you be selling these if you manage it or going open source? ;)

Cheers
Stot

skov 17th February 2014 07:28 PM
Quote:
Originally Posted by james3004 (Post 95833)
That's not so good! Will need it in a couple of weeks if I can borrow it back for a bit;)
No worries, just give me a shout when you need it.
Don't think my engine's going to be back in any time soon at this rate though :rolleyes:


Quote:
Originally Posted by Stot (Post 95834)
Thats what it looked like to me, the B6 Brain Surgery bit gives it away... Is it ARM based? Will you be selling these if you manage it or going open source?

Cheers
Stot
No it's an S12X. I did debate whether to use an ARM or not, but I'm far more familiar with this particular chip and decided it was going to be quicker and easier for me to get it up and running with it.

Have to admit it did cross my mind to sell a few if there's any demand :)
I might well be looking for beta testers at somepoint if you're interested ;)

Stot 17th February 2014 08:20 PM
That sounds cool, I can alpha/beta test when you get to that point and maybe even help with coding it if you need it. I'm a programmer, mainly web, Java, Objective C etc but I have dabbled in ARM development and written some PIC stuff here and there so pick most things up quickly.

Cheers
Stot

CTWV50 17th February 2014 08:46 PM
Quote:
Originally Posted by skov (Post 95836)
Have to admit it did cross my mind to sell a few if there's any demand :)
I might well be looking for beta testers at somepoint if you're interested ;)
I'd be up for that, I might learn something!:)

skov 17th February 2014 11:47 PM
Quote:
Originally Posted by Stot (Post 95837)
That sounds cool, I can alpha/beta test when you get to that point and maybe even help with coding it if you need it. I'm a programmer, mainly web, Java, Objective C etc but I have dabbled in ARM development and written some PIC stuff here and there so pick most things up quickly.

Cheers
Stot
Excellent, I'll give you a shout when I get a bit futher along.
I know what I'm doing on the embedded side, but a bit of help might be useful on the user interface :)

Quote:
Originally Posted by CTWV50 (Post 95838)
I'd be up for that, I might learn something!
Ha ha, I thought you might be :D
Do you know which ECU you've got? It should have a label on it saying something like B64F or B63H.
I think they changed the ECU on the 1.6 around 1994 and I don't know if this will work on the later ones.

CTWV50 18th February 2014 12:35 PM
Quote:
Originally Posted by skov (Post 95842)
Excellent, I'll give you a shout when I get a bit futher along.
I know what I'm doing on the embedded side, but a bit of help might be useful on the user interface :)



Ha ha, I thought you might be :D
Do you know which ECU you've got? It should have a label on it saying something like B64F or B63H.
I think they changed the ECU on the 1.6 around 1994 and I don't know if this will work on the later ones.
Oh, I have a B6GP! :(

skov 18th February 2014 01:16 PM
Quote:
Originally Posted by CTWV50 (Post 95845)
Oh, I have a B6GP! :(
Bugger :(
There is a possibility you could switch to one of the earlier ECUs.
I've heard it's possible with a few small changes to the wiring loom ;)

CTWV50 18th February 2014 01:19 PM
I've got the mazda wiring diagrams, I'll have a look tonight, it may just be different pinouts on the ecu?

skov 18th February 2014 01:45 PM
The pinouts are almost identical between the early and later 1.6 ECUs:

CTWV50 18th February 2014 01:53 PM
No mine is a B6 (115bhp) not the later (BP 90bhp). :confused:

Only real difference there is later cars had sequential for emissions, not batch. I think mine will be the same as yours. Pretty much.

skov 18th February 2014 02:04 PM
Quote:
Originally Posted by CTWV50 (Post 95849)
No mine is a B6 (115bhp) not the later (BP 90bhp). :confused:

Only real difference there is later cars had sequential for emissions, not batch. I think mine will be the same as yours. Pretty much.
I'm confused too - I thought the B6GP was the ECU for the 90bhp version :confused:

Is there any chance you could pop the lid off your ECU and take a photo of it's innards?

CTWV50 18th February 2014 02:08 PM
Quote:
Originally Posted by skov (Post 95850)
I'm confused too - I thought the B6GP was the ECU for the 90bhp version :confused:

Is there any chance you could pop the lid off your ECU and take a photo of it's innards?
Yeah sure, do it tonight. It's definitely not the 90bhp engine or the engine code would start BP and I did sort out the loom using the B6 wiring diagrams. I think this is a case of incorrect internet forum posts. I thought my car was BP when I bought it because it was a '95 car so probably other people have too and assumed the B6GP was for the later 90bhp engine.

CTWV50 18th February 2014 02:11 PM
HA! There you go!

https://www.mx5oc.co.uk/forum/yaf_po...questions.aspx

CTWV50 18th February 2014 02:12 PM
OK I'm doubting myself now! :confused:

edit: This is what I typed 3 years ago on my build thread...

Quote:
Originally Posted by CTWV50 (Post 56292)
Yeah FWD VWs and audis, I've had a fair few, not great at getting off the line and not as reliable as people would have you think. Anyway back to the MX5, I can't believe they fitted an aluminium sump and a stainless steel exhaust manifold as standard, such a bonus, engine should be nice and lightweight, bye bye production car understeer!:D

I'm reading a book about the design/development of the MX5, weight was a massive deal, people were threatened if weight wasn't kept to a minimum. They even lightened the crank and flywheel compared to the 323 transverse engine it was based on allowing to rev to 7200rpm.

The Donor is a 1.6 1995 model but it isn't the later tweaked 90 bhp engine that was not available to buy till Nov 1995 and had a steel sump. Mines a May 1995 and has a B6 engine code. So if anyones looking to buy a 1995 mx5 check the engine code is the correct for the one your after and seeing as the emission test was tightened up for cars after August 1995 you may want to play safe with the earlier engine. The 90bhp engine code starts with BP. Had another nose under the engine bay today just before dark, the rad fan is only half the size of the radiator and looks like it will be suitable for the roadster if it can be made to attach to the polo radiator.

Signed up to mx5oc forum to get a seller thread going when I'm ready to break the car down.

Need to get the garage sorted first and get some welding practice in before building the build table. Took some measurement and if I keep the garage clear I should be able to keep the whole car in the garage when finished along with other essential garage belongings. I may need to sort a shed at some point though for the gardening tools. I digress...:rolleyes:

That is all goodnight.

skov 18th February 2014 02:30 PM
Quote:
Originally Posted by CTWV50 (Post 95851)
Yeah sure, do it tonight. It's definitely not the 90bhp engine or the engine code would start BP and I did sort out the loom using the B6 wiring diagrams. I think this is a case of incorrect internet forum posts. I thought my car was BP when I bought it because it was a '95 car so probably other people have too and assumed the B6GP was for the later 90bhp engine.
Ummm, I thought only the 1.8's were BP engines, and the 1.6 was a B6 regardless of whether it was a 115 or 90bhp unit :confused:

CTWV50 18th February 2014 02:51 PM
Quote:
Originally Posted by skov (Post 95854)
Ummm, I thought only the 1.8's were BP engines, and the 1.6 was a B6 regardless of whether it was a 115 or 90bhp unit :confused:
You know what! I think your right it's a 90bhp! I'll check the wiring diagrams I used for injector outputs but I have a feeling it's sequential! Good job I've got that 1.8 engine sat there! :rolleyes:

CTWV50 18th February 2014 05:50 PM
It's a 90bhp. I believe you can turn it into a 115bhp as you say by batching the injectors but needs cam change to make it work correctly I think although my engine is 9:1 not 9.5:1 like the earlier engines. Hmmm!

skov 18th February 2014 06:53 PM
As far as know you need to change the cams, pistons, and ECU to convert it to 115bhp spec.
A heavy head skim might have the same affect as changing to the higher compression pistons.

I do belive the 90bhp version is the engine of choice for turbo applications though ;)

CTWV50 18th February 2014 07:04 PM
Quote:
Originally Posted by skov (Post 95858)
As far as know you need to change the cams, pistons, and ECU to convert it to 115bhp spec.
A heavy head skim might have the same affect as changing to the higher compression pistons.

I do belive the 90bhp version is the engine of choice for turbo applications though ;)
Oh really! :D

PorkChop 18th February 2014 10:48 PM
The 115bhp 1.6 was dropped by 1994 when Mazda introduced the 1.8 BP engine. AFAIK only the European market had a 1.6 offering (the 88/90bhp) from 1994 on. The BP engines are all 1.8, all the 1.6 Mazda B engines have the code B6.

It's lower CR will lend itself to charging, however, I believe things like the piston squirters were removed when the 90bhp unit was introduced, which makes them less suitable. The majority of charged 1.6s I know of are 90-93 based.

skov 21st February 2014 01:49 PM
That's my weekend sorted!

james3004 21st February 2014 02:28 PM
So you'll be test driving by Saturday lunch time;)

skov 21st February 2014 03:17 PM
Quote:
Originally Posted by james3004 (Post 95891)
So you'll be test driving by Saturday lunch time;)
Yes.

But not this Saturday.

skov 8th March 2014 11:20 AM
Quote:
Originally Posted by james3004 (Post 95891)
So you'll be test driving by Saturday lunch time
Only two weeks late - just had a cheeky test drive up and down my street :D

Engine is back in and running now. Took me a while to get it started until I realised I had my spark plug leads in the wrong order :rolleyes: Once that was sorted it burst into life :D
Had it running for twenty minutes or so and got it up to temp. Haven't spotted any leaks or heard any nasty noises, so hopefully I should be back on the road shortly!

Decided to hold off on the turbo for now and wait until I've got my little engine management project up and running.
Ordered a small batch of prototype PCBs for it this week and looking forward to having a play with them :)

CTWV50 8th March 2014 06:32 PM
Quote:
Originally Posted by skov (Post 96151)
Only two weeks late - just had a cheeky test drive up and down my street

Engine is back in and running now. Took me a while to get it started until I realised I had my spark plug leads in the wrong order :rolleyes: Once that was sorted it burst into life :D
Had it running for twenty minutes or so and got it up to temp. Haven't spotted any leaks or heard any nasty noises, so hopefully I should be back on the road shortly!

Decided to hold off on the turbo for now and wait until I've got my little engine management project up and running.
Ordered a small batch of prototype PCBs for it this week and looking forward to having a play with them :)
I reached a major milestone today! I changed my gearbox and engine oil! :p Well done getting it back on the road so quick! Just in time for spring!

skov 8th March 2014 07:48 PM
Quote:
Originally Posted by CTWV50 (Post 96159)
I reached a major milestone today! I changed my gearbox and engine oil! :p Well done getting it back on the road so quick! Just in time for spring!
Cheers Chris. Would have been quicker if I didn't have to wait an eternity for the parts!
Well done on your major achievement :D

skov 24th March 2014 09:19 AM
Some goodies in the post this morning :D

CTWV50 24th March 2014 07:24 PM
Quote:
Originally Posted by skov (Post 96401)
Some goodies in the post this morning :D
Did you make them or order them? Have you got a machine at work to solder the components on?

skov 24th March 2014 10:16 PM
Quote:
Originally Posted by CTWV50 (Post 96412)
Did you make them or order them? Have you got a machine at work to solder the components on?
I got the boards from OSH Park. They took a while to arrive (from the US), but they look really good and were surprisingly cheap.

Machinary to solder the parts on? Nah, just a normal soldering iron and pair of tweezers :D

CTWV50 24th March 2014 10:20 PM
Quote:
Originally Posted by skov (Post 96416)
Machinary to solder the parts on? Nah, just a normal soldering iron and pair of tweezers :D
Wow! I'd be cross eyed doing that! I replace dc sockets on laptops as part of my job and have removed and replaced bios and 8 pin SIOC chips but no, I couldn't manage that! Hats off to you!

skov 24th March 2014 10:49 PM
Quote:
Originally Posted by CTWV50 (Post 96417)
Wow! I'd be cross eyed doing that! I replace dc sockets on laptops as part of my job and have removed and replaced bios and 8 pin SIOC chips but no, I couldn't manage that! Hats off to you!
There's nothing much harder than an SO8 on that board to be fair.
The trick is to use plenty of flux and have some solder wick handy to fix any mistakes.
For the really fine pitched devices you just need to tack down the corners, then get some solder on the end of your iron and sort of brush it along the legs of the chip. The flux makes the solder flow to where it needs to go.
I suspect wasting my youth painting warhammer figures probably helps though :D


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