Bidding has ended on this item.

Posts to:
Posts to:

Details about  Mazda MX5 Mk1 1.6 GReddy Turbo + Megasquirt ECU complete kit!

See original listing
Mazda MX5 Mk1 1.6 GReddy Turbo + Megasquirt ECU complete kit!
Item Ended
Item condition:
09 Mar, 2014 17:00:23 GMT
Winning bid:
8 bids ]
May not post to United States - Read item description or contact seller for postage options. | See details
Item location:
Northwich, United Kingdom


eBay item number:
Seller assumes all responsibility for this listing.

Item specifics

Condition: Used Part Manufacturer: GReddy
This is a rare chance to purchase a complete tuneable turbo kit for a Mk1 Mazda MX5 (1.6) / Eunos Roadster. This kit is sufficient to boost your engine's output to over 200bhp turning the MX5 into a monster.

I spent about 5 years building this kit up and tuning it on my MX5 but I've now broken the car for spares and I'm selling this as a complete bolt on kit.

The kit is based on the popular GReddy turbo kit for the 1.6, however most of the standard kit parts have been upgraded, all that remains of the original kit is the turbo and the manifold. I also added an intercooler (Saab) which is not included in the original kit. Included with the turbo is:

  • Mitsubishi TD04 turbo charger (I ran this at 11psi). Minimal play in the compressor and all blades in good condition (see photo). Always ran on fully synthetic engine oil and allowed to cool down via a turbo timer.
  • Oil inlet line to connect to factory oil outlet on NA6CE engine block
  • GReddy exhaust manifold - this was supplied new with relief cuts and has no cracks.
  • Upgraded custom made 'Turbo Tony' downpipe - provides hugely better flow than the standard GReddy item and cost a fortune to import from the States. (Search the MiataTurbo forum for more on this downpipe).
  • Saab intercooler
  • Custom intercooler pipework (some in stainless steel, some painted mild steel)
  • Silicone hoses to connect intercooler pipework
  • Bailey dump valve
  • HKS mushroom air filter
  • GM air temperature sensor
The kit also allows you to remove your airflow meter and have an air filter connected directly to the turbo.

Also included is a ready built Megasquirt 1 ECU which is a replacement ECU for your car; you unplug your standard ECU and plug this in, then connect your laptop and you have everything you need to tune every aspect of your engine. The ECU includes a plug and play connector for your standard MX5 wiring harness, all you need to do is splice into one wire for the fuel pump (I've labelled this to make it clear).

I purchased this ECU as a kit from DIYAutotune in the US and built it up myself - see the photo of the interior of the ECU to see the quality of the build. It has ran flawlessly for me for the past few years and transforms the car, unlocking the potential of the turbo. The ECU is running the MSnSE ('Megasquirt n spark extra') firmware which allows you to control both the fuelling and the ignition timing. Timing is where you gain the power so this is important!

Megasquirt is an incredibly flexible ECU with a thriving DIY community. As a base it lets you do the basics of engine management, but is flexible enough to be extended to do things such as water injection and launch control if you desire.

You will need a copy of the TunerStudio software ( but I will supply a copy of the map loaded onto the ECU on a DVD. Please note - this map should be viewed as an example only! You will need to tune it for your car and I accept no responsibility for you blowing your engine up if you don't!

To monitor the performance of the engine an Innovate Motorsports LC-1 wideband controller (inc Bosch sensor) and DB guage are included - this integrates with the Megasquirt ECU to monitor your fuelling and the DB guage gives you a readout of the lamba on the dashboard. This unit alone cost over £250.

Included are 4x RX7 460cc fuel injectors and a modified MX5 wiring harness to allow the RX7 fuel injectors to plug straight into the MX5. I purchased the fuel injectors from a forum member in the States and whilst I never had a problem with them you should probably budget to have them cleaned just as a matter of good practice. You will also need new o rings (<£10) as the old ones were hard when I removed the injectors.

Everything that's included in the auction:
  • Mitsubishi TD04 turbocharger
  • GReddy MX5 1.6 Mk1 turbo exhaust manifold
  • Braided turbo oil inlet pipe
  • Turbotony exhaust downpipe, including flexipipe
  • Saab intercooler and associated custom made pipework / silicone hoses
  • Bailey dump valve
  • GM air temperature sensor
  • HKS mushroom air filter
  • 4 Mazda RX7 460cc fuel injectors
  • RX7 -> MX5 fuel injection wiring harness
  • Megasquirt ECU - (Exact model: Megasquirt 1 DIY, PCB v3) loaded with MSnSE firmware
  • Megasquirt -> MX5 wiring harness with Boomslang ECU connector
  • Innovate Motorsport LC-1 wideband lambda controller
  • Bosch wideband lambda sensor
  • Innovate motorsports DB wideband air/fuel ratio guage 
  • Savage boost gauge
  • 1 DIN guage mounting panel (fits below radio). Also has LC-1 status LED and reset button attached.
  • DVD containing current ECU map / firmware
  • Serial cable and Serial->USB adapter for connecting ECU to computer

Additional things you will need that aren't included to fit this:
  • A length of oil hose to connect the turbo oil drain to the engine. You can either connect this to the factory oil drain inlet (below the inlet manifold) or tap a barb into the sump
  • New o rings for the fuel injectors
  • Some means of boost control, for example a manual boost controller. You can control it off the wastegate but you will get much more stable performance by fitting one of these (<£20). I need the one that was fitted to my MX5 so it's not included.
  • A computer / laptop running ~TunerStudio or MegaTune to tune the car.
  • Silicone vacuum hose to connect things up (e.g. the ECU to the inlet manifold)
  • It would be advisable to make sure your fuel pump is up to the job of supplying the injectors, I would recommend fitting a high output Walbro fuel pump.

This kit will transform a standard NA MX5 into a fire spitting monster, it can be dialled down to a 'daily driver' level or wound up to a race level with minimum fuss. With this stuff fitted to my MX5 it was significantly faster accelerating than my 'drift tuned' Nissan S13 - the light weight of the MX5 means 200bhp feels very, very fast indeed.

Fitting the turbo kit is a weekends job for an amateur and whilst there is a learning curve in tuning the ECU the forum is amazingly helpful and I went from a fuel injector novice to understanding how to tune my car to make it perform really well in a few months.

The kit is located in Northwich, Cheshire and I would prefer collection if possible as the turbo and manifold and quite heavy. However I will happily courier it at your cost.

Thanks for looking I will be happy to answer any questions.

Questions and answers about this item

No questions or answers have been posted about this item.

Submit bid

Time left:
Current bid:
(Approximately ##1##)
Import charges:
Your maximum bid:
Your maximum bid:
Please read the full listing. By clicking Confirm bid you commit to buy this item from the seller if you are the winning bidder. You will enter a binding contract.
By clicking Confirm bid, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Resume bidding, if the page does not update immediately.
Submit bid
Review and confirm your bid
Bid confirmation
Free P&P
See item description
(Approximately ##1##)
(Enter ##1## or more)
(Enter more than ##1##)
Your maximum bid:
Increase maximum bid
Submit bid
Confirm bid
Increase maximum bid
Change bid
, you've been outbid. Don't let it get away - bid again.
, you're the highest bidder on this item. Hope you win it.
, you're the first bidder. Hope you win.
, you're currently the high bidder, but you're close to getting outbid.
, this auction is almost over and you're currently the high bidder.
, you're the high bidder, but the reserve price hasn't been met.
Please enter your bid again.
Please enter a valid number as the bid price.
Enter an amount that is equal or greater than the minimum bid required. This can be found under the bid entry box.
Maximum bids can't be lowered once they're submitted.
This seller requires the buyer to have a PayPal account to purchase this item. Get a PayPal account here .
Your bid is greater than or equal to the Buy it now price. We recommend you purchase this item via Buy it now. If you still wish to bid, you may do so below.
Time left:
Current bid:
(approximately ##1##)
Your maximum bid:
(approximately ##1##)
Increase your maximum bid:
By clicking 1 Click Bid, you are agreeing to buy this item from the seller if you're the winning bidder. Learn moreabout 1-click bid - opens in a new window or tab
(approximately ##1##)
Winning bid:
Starting bid:
Congratulations The auction has ended and you're the winner.
The auction has ended, but the reserve price was not met.
Sorry, the auction has ended and you were outbid.
Good news, you're the highest bidder.
Sorry, you've been outbid.
You're the highest bidder, but the reserve price has not been met.
Please enter a higher amount than the current bid.
Maximum bids cannot be lowered once submitted.
Please enter a valid number.