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Discussion Starter · #1 ·
So earlier today I went down the Southampton to go see a Marina blue mk1, it's secured as mine and I'll be picking it up sometime in the next 10 days


I can't wait as driving around in a loaned Fiat 500 1.2 Pop is actually soul destroying...

For those who don't know I started out with a 1.8 mk1 that I spent alot of time on last year, but it's rustier than I could have ever expected so it'll be being broken soon
check out the build thread for it here:
http://www.mx5nutz.com/forum/index.php?showtopic=91635&st=100#entry1333772

The plan with this one is to move over some of the nice bits from the 1.8 black car onto this new one, use it as my daily for the time being and get round to fitting the 2.5 KLV6 I've got sat under a bench here at work to it...

I'll update this thread with pictures when I collect it and hopefully 2013 will be a very good year!

Daniel
 

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I know which blue one your getting.... did you see the grey one by any chance ?

I reckon your going to have so much more fun with swapping the bits over and enjoying
the blue mariner driving.

Look forward to the new build thread
 

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from what ive seen, im not sure its quite as easy as just fitting those KL engines, but yeah its been done.

get some pics up mate.
Dan knows what he is doing and has some excellent facilities at his disposal....
 

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Discussion Starter · #6 ·
I've completely forgotten about this thread... nothing has changed with the car tbh other than fitting of the Ali rad and the aircon delete pipework under the dashboard...

I do however have a pile of parts that keeps getting bigger and BIGGER... I think a weekend of tech needs to be done along with some serious photo updates!

Dan
 

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Discussion Starter · #7 ·
Right, well not the hugest photographic update but...

Since I've had the car it's been in need of brakes, the previous owner has at some point removed the dust boots from all 4 brake calipers which has resulted in the pistons being shagged. I've got a contact at HiSpec and being in the trade thought that I could develop a kit with them but they can't get competitive enough on price and they don't seem interested in working with anyone to any kind of timeframe so thats gone out the window! Probably looking at fitting a complete 1.8 setup with some M1144 pads to see how it all feels - I can always upgrade to a Wilwood kit at the front come a later date.

Engine wise I've only just managed to get the old engine from my old shell out, along with the all important gearbox. So again not a lot has happened on that front! Hopefully I'll get them split and the V6 mounted up to the gearbox at some point later this month.

I have however been de-powering a rack for it, which is stripped and welded (by a local company who specialise in welding) and ready to put back together which will hopefully bring some more feel to the front end.

I do however have an ECU on the way, working on developing a UK manufactured plug and play kit for the MX5 that will include all the VTPS and IAT gubbins - it's looking promising currently so can't wait to get one on the car!

I've also built up a lightweight loom for it, which has the wiring removed for the pop up lamps (don't need them with the below mentioned items...) and secured some particularly nice toggle switches etc from the ex-typhoon and harrier campaigns - along with the new loom and ECU on the way I'll hopefully be able to save some KG's from the standard electrical system.

Besides those little bits I've been buying a few odds and sods - a pair of smaller/lighter mirrors for starters, a pair of TRS tow straps, a steering wheel, toggle switches...

The current spec is:

MK1 1.6 Eunos Roadster
Mariner Blue
VLSD (locks when it likes)
Stripped interior
1 x Sparco Rev seat
330mm Personal Grinta steering wheel [suede+yellow stitching]

Parts waiting to be fitted:
Lightweight loom
Sparco Rev seat
TRS tow straps
Depowered rack - the proper welded way
Lightweight mirrors
KLv6 engine along with some bellhousing bits from clairtoo on here
MK1 1.8 Torsen, driveshafts and prop

Along side this lot I managed to buy on my birthday probably the rarest JDM item I've ever owned.. A Garage Vary Type 3 complete front bumper and light set, which is in very good condition really - in need of some TLC around where the lights mount but this is only due to bad design and no doubt a few different owners! I'm really chuffed tbh!

So my plan of attack really is to sort the brakes, whilst it's up in the air I'll also raise the ride height and track the car up as there is HUGE amounts of camber at the back. I'll also take the opportunity to fit the Torsen diff. That's a long enough day for one person so I might drag my brother into help for that one!
The smaller detail bits like the wing mirrors and tow straps will be fitted in around my work load - I'm manic at the minute building wiring looms for all the single seater chaps who want to get out testing late Feb/early March...

The ECU is a faster occuring item with some time in the diary already to get stuck into the development mapping etc.

The custom loom however has kind of reached it's point because I need the GV front end fitted before I delve too much deeper into that!

I'll give the car a wash over the next few days and get some better pictures up - but for now here goes!

Steering pinion


Switches


Rear


Front
 

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Discussion Starter · #8 ·
well a little update... I've been a busy boy with work!

The MX5 has had new brakes fitted (1.8 upgrade including some Rodders pads) along with HEL hoses and some ATE Superblue brake fluid - what a difference it makes to the heavily warped setup that was there!

I've also cut some weight from the back of the car - removed the bumper support and cut the rear bumper cover, removed the towing eyes and fitted the TRS tow strap. It looks more purposeful now and just that bit weight off the back has meant that I can now go into Sainsbury's car park without bottoming out! HAZZAH!

I've also fitted the TRS strap to the front and fitted my passenger seat.

I've been offered some tuning bits for the standard 1.6ltr engine and I've developed a PNP ECU through work which I'll be running soon. I've also got a set of CBR1000RR throttle bodies sat down the workshop which I'll be adapting to fit too. The KLv6 is up for grabs, realistically if I fit it I'll be instantly inside classes that I can't be competitive with come local club events - staying with the 1.6 if I carry out NA tweaks I'll happily be inside the sub1.6 classes.

I'll get some photo's up when I next give it a wash - on saturday I'm planning on removing the front bumper support in a weight saving mission along with some other un-needed bits from the engine bay... that's if I can get this F4 car finished!

Dan
 

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Discussion Starter · #9 ·
So today I began tuning the PNP ecu that I've been developing - to measure on a fair playing field I measured the car COMPLETELY standard.

This gave the following graph which shows 78BHP @ 6.6k and 68FTLB @ 4.6k all measurements were done at the wheels with the same tyres at the same pressures - trying to be fair as I can with it. I couldn't accurately judge the OEM coolant temperature on the standard gauge but all future runs were done with the ECU's temp showing between 70 and 85 degreesC.

Standard graph:



After fitting the PNP ecu and doing some quick tuning we got to here:

83BHP @ 6.3k and 76ftlb @ 5k



and the two graphs back to back....



Looking at the curves it was apparent that the top end was being strangled by the induction system - still running the MAF in these tests was showing it's weakness!

So I removed the MAF for a single run when I'd got this far and ran without an air filter - the torque was noticeably better at the bottom end (3k) and the top end was a good 8BHP up from where it was with the MAF fitted. I'm awaiting a decent air filter to arrive before I tune without a MAF - hoping to get up to 92-98BHP at the wheels hopefully.

Last year when I ran my standard MK1 1.8 on the same rollers it pulled a steady 93BHP on three separate occasions.

More tomorrow...

Dan
 

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wow awsome build so far and seems you know exactly what to do with the ecu/tuning buisness i am wright in saying its still a 1.6? if so will be keeping a good eye on this be a good base to know what to do with tuning mine.

keep up the good work
 

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Discussion Starter · #12 ·
Yeh it's a little 1.6 still - I guess it was one of the 90BHP cars based on the power she's showing.

It drives alot better at full chat now - really can hear it pickup and want to go... shame it runs out of puff!!

Got the bits ordered for the intake upgrade so will hopefully have them here for the end of the coming week and some better tune files together with that next weekend - If I can get 95 at the wheels I'll be really happy. I've got some silencers and pipework coming over from Jetex too in 2" form which is proven to be the right size for up to 150-160BHP and being an early car I can dump the cat. With everything in then I'd like to see high 90's at the wheels which would be near on 30% increase in power.
 

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Discussion Starter · #17 ·
so today I got the bits through to ditch the MAF sensor which proved to be an obstruction when tuning before, since the last dyno pulls I've also replaced the standard exhaust (which developed a blow) with a decat and rear section. I made the exhaust in house and I now only have two silencers between the engine and the tailpipe so it's free flowing and is in 2" pipework. I feel that it's a true representation of what the MX5 owner would do in the hunt for power, spending out on an exhaust to free up the mapping etc.

So...

Assumed standard 1.6 - not even taken the rocker cover off.
www.mx5pnp.co.uk ECU - developed and a quick map done for the purpose of the experiment.
Decat and free flowing exhaust system - standard manifold.
Maf removed - K&N cone filter fitted behind the bumper on the o/s/f with 3" ducting to the inlet manifold where a 90degree silicon bend reduces to 2.5"



against the same engine when COMPLETELY standard



in short - over 25% more power at peak and driving it you do feel a bit more push in your spine when it happens at 4k....

more soon!

Dan
 

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Discussion Starter · #20 ·
Thanks Rob,

The plans for the car are still up in the air really. I quite like the little 1.6 engine so quite fancy building a HC lump fully balanced for 8k motoring with some cams and ITBs, but it's another ££££? to do it properly and business is getting busier and busier. Would be really interested to see what your car makes - I spent a while with this adding and taking fuel past 3800rpm and the fuelling it has at the minute gave the best power and EGT stayed stable. Interestingly it didn't want/need as much ignition timing as I thought it would...

Dan
 
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