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KugaWestie posted a topic in Tech TalkThis may be one of the worst kept secrets in forum history In 2013 I upgraded my MX5 1.8 engine from standard to a BLiNK flowed and tuned head, reprofiled cams and megasquirt, which netted me approx 150bhp at the fly, 120bhp at the hubs. http://forum.wscc.co.uk/forum/index.php/topic/100443-mx5-sdv-power-upgrade-project/ This got me a great road car with good performance. The inevitable happened though......I took it on track, and that got me wanting even more. So roll forward to August 2014, and I managed to get my hands on this little package A Rotrex C30-74 Supercharger
I have now had the car for 12 months, and have spent some time exploring avenues to increase the power on my car. I looked at Supercharging using an Eaton M45, as this is quite a common MX5 engine upgrade. The normal position for the M45 is on the hotside next to the head. Unfortunately fitting it on the Westfield in this position would mean a fairly large cut out in the bonnet and I did not want to do that. I think a Rotrex type charger would probably fit lower down where the power steering pump is normally housed, but they are eye wateringly expensive, so I ruled this out I also considered turbo charging. This all seemed to be extremely tight in the engine bay with potential cooling/heat issues, and frankly I did not fancy it. So the only other option is to stay NA, and try and squeeze more power out of the engine. After several discussions with Northampton Motorsport and Blink Motorsport (both traders on here) I have decided to work with Blink to see where we can get the car to. Throttle bodies were considered, but have been put to one side at present. So the plan is to do the following.............. Part One:- Drive the car up to Blink and do a power run, so we have a starting point. Whilst there, drop off a spare cylinder head that I have got complete with a spare set of camshafts. Come back home with a brand new PnP Megasquirt ECU and Innovate Wideband o2 Sensor. Part Two:- Fit the PnP Megasquirt to the car along with the wideband, and run the car for a few weeks. Whilst running the car round with the new ECU on it, Blink will "Optimize" my spare head. http://www.blinkmotorsport.com/cylinderhead.html Spare cams will be sent off to Piper for re-profiling. Part Three:- When the head is "Optimized" and the cams are ready, Blink will send these back to me. I will then fit the new head on the car, along with the new cams. Some help from Blink will be required to adjust the Megasquirt to allow for the new cams etc. I have ordered a new Westfield exhaust manifold to replace the standard Mazda manifold and S pipe, so when fitting the new head I will also fit the new manifold. Part Four:- Once the head, cams and exhaust manifold are fitted, I will then drive the car back up to Blink for final mapping. This will take a while for all the work to be done, but hopefully it will be well worth it. I know if this proves to be a successful project, Blink will be very keen to offer this up as a group deal or similar if there is enough interest. Power gains are pretty much unknown as this is an untrodden path for us with the 1.8 engine, but I am hoping to see a good increase. I will do my best to keep this thread up to date with progress as we go.