MY MK1 Supercharged MX5 (Eunos Roadster)

[HorneyMX5]

Trackday in 8 days, much to do.

The CC clutch is now bedding in nicely with loads of bite and having covered 200 miles I've started giving it some beans. Very impressed. With the lightened flywheel 1st and 2nd gear are now ballistic!

Today I change the box, diff and turret oil:

Untitled by Nicholas R Horne, on Flickr

Untitled by Nicholas R Horne, on Flickr

My to do list for next monday looks something like this:

• Fit Mocal oil cooler and Filter Sandwich plate

• Fit Oil temp take off sandwich plate with above

• Oil and Filter change

• Wheel alignment check and adjust

• Swap rear tyres left to right to even out wear

• Fit gauge pod

• Fit and wire up boost and oil temp gauges

• New plugs and leads

I also have an exhaust blow which I suspect has come from removing the echuast to change the clutch. If I get time I'll investigate this but it's pretty low down the priority list.

[HorneyMX5]

Big thanks to Javelin Trackdays for an excellent day at Castle Combe today. It was the first trackday since Skuzzle Motorsport assited with all things supercharger and fitted the Competition Clutch 6 puk and Flywheel. The car was epic, only let down but the sacks of meat behind the wheel. There's a few things now to patch up or improve and the next stop, back to Castle Combe on the 10th May for Japfest.

Anyway have a couple of fly by vids with my Dad at the wheels:

http://youtu.be/KufD0UmBHi0

http://youtu.be/NwFciDOiZLo

and some pics:







_DSC3559 by Nicholas R Horne, on Flickr

And a couple of flying laps:

http://youtu.be/q-uufOBQwSw

Edited by HorneyMX5 on Monday 28th April 23:09

[anonymous-user]

Any plans for oil pressure gauge? Is this running a standard sump?

[HorneyMX5]

Topbox said:

Any plans for oil pressure gauge? Is this running a standard sump?

Being an early import it has a fully functioning oil pressure gauge in the main clocks which is a result. Sump is standard although starting to think a baffled one might be a good idea at some point.

[anonymous-user]

Topbox said:

Any plans for oil pressure gauge? Is this running a standard sump?

I retract my last. A little research suggests that a standard sump will do the job even on track.

[HorneyMX5]

A few things to fix after the trackday.

1) Exhaust is now blowing like a trooper. It's blown the gasket out of the downpipe/decat flange. Booked in to an exhaust place on Tuesday morning. I hate trying to do exhausts myself.

2) I've got a suspension knock that's getting worse. I can't find anything wrong and it only happens under very heavy load on turn in. I suspect a worn wishbone bush somewhere, further investigation required.

3) Gearbox is sounding like a bag of spanner, not sure it's long for this world. One to keep an eye on.

4) One of the idler bearings for the charger belt is squealing. Replacements ordered as they look pretty old.

Japfest is this Saturday so decided it was time to give it a proper polish as the paint had gone really flat. Also the SPa Six Hours stickers really needed to be removed. I pulled them off and on the Satin black bonnet they left loads of marks so that got removed and rattle canned again. I also recently bought a front tow hook so that was sprayed up and fitted.

Untitled by Nicholas R Horne, on Flickr

Untitled by Nicholas R Horne, on Flickr

I've also put a roundel back on the bonnet as I had one spare form when I bought them last year.

Still a few jobs to do before next weekend like refit my yellow indicators which I've been meaning to do for ages and fit a dial cowl as I broke my old one trying to mod it for my Oil and Boost gauges.

[HorneyMX5]

Went out to get some BBQ stuff, ended up going on a thrash and grabbing some phone pics. Love summer.

Untitled by Nicholas R Horne, on Flickr

Untitled by Nicholas R Horne, on Flickr

Untitled by Nicholas R Horne, on Flickr

[HorneyMX5]

Update: It's broken.

Supercharger bearings have died and the gearbox is being replaced with a MKII 5 speed item as mine is now very hard to select 1st or reverse.

Hopefully be back on the road in July, just in time for it to fail an MOT, lol.

[HorneyMX5]

Not updated this in a while, bad Horney!

It's been a busy few months of modify, race, break, repeat. Touch wood I have got over most of the niggles and reached a place where it should be reliable. I've probably jinxed it now.

The main news is that it is now fitted with a 15% reducer supercharge pulley combined with an Intercooler and a dump valve. This has meant that that lovely chap Nick at Skuzzle Motorsport has managed to tweak the map and give me 221bhp at the Flywheel. It's quite the weapon now.

Some pictures for you all.

Old pulley removal:

Untitled by Nicholas R Horne, on Flickr

Relocation of oil cooler to just under the crank pulley:

by Nicholas R Horne, on Flickr

Intercooler test fitting and pipe run decisions:

by Nicholas R Horne, on Flickr

Pipework welding:

by Nicholas R Horne, on Flickr

Radiator dropped an inch and tilted back to allow the pipe run:

by Nicholas R Horne, on Flickr

Air Temp sensor nut welded on:

by Nicholas R Horne, on Flickr

All done:

by Nicholas R Horne, on Flickr

Some AutoSolo shots from September:

by Nicholas R Horne, on Flickr

by Nicholas R Horne, on Flickr

by Nicholas R Horne, on Flickr

And a video of some of the AutoSolo Action:

http://youtu.be/DdXGN9lL5H0

2015 plans are to add a 6 speed box and Torsen LSD from a MK2, some uprated Anti Roll bars and go Sprinting and Hill climbing. I also need to get some bigger injectors as they're currently running at 112% Duty Cycle at 6500rpm. OK on the road but not so good for holding it high in the revs at an event.

[GC8]

That'll end in tears...

[HorneyMX5]

GC8 said:

That'll end in tears...

The injectors or the sprinting?

[GC8]

The former! Do you have a Knocklink, DetAlarm or similar, or a wideband lambda sensor and an AFR gauge?

If it leans out you could hole a piston or destroy your big ends before you have realised that its going wrong.

[HorneyMX5]

GC8 said:

The former! Do you have a Knocklink, DetAlarm or similar, or a wideband lambda sensor and an AFR gauge?

If it leans out you could hole a piston or destroy your big ends before you have realised that its going wrong.

Nope, none of that. Only more gauges to worry about. It's chucking in plenty of fuel and wasn't leaning out at all on the rollers so I'm not overly worried for winter road use but it will be getting some Supra injectors or similar before the 2015 season kicks off. It's currently running RX8 yellows.

[HorneyMX5]

Joined by Nicholas R Horne, on Flickr

[Beedub]

love that intercooler, and pipe work but cutting the slam panel was lazy for the fabricator. More then enough space down low to route the pipes without needing to do that, I'm not sure if thats structural but on a old roadster id want parts potentially structural parts left un-touched. The work does look great however.

[HorneyMX5]

Beedub said:

love that intercooler, and pipe work but cutting the slam panel was lazy for the fabricator. More then enough space down low to route the pipes without needing to do that, I'm not sure if thats structural but on a old roadster id want parts potentially structural parts left un-touched. The work does look great however.

It's about as structural as a fag paper. Routing it that way and cutting the panel massively reduces the pipe run compaed to running it down and round the rad. Less pipework, less throttle lag, happy HorneyMX5. I will tidy up the whole install at some point and that includes the cut slam panel, at the moment it's all about getting it working properly.

[HorneyMX5]

Untitled by Nicholas R Horne, on Flickr

[InfamousKeiran]

This is ridiculously cool, is that a Speedhunters sunstrip I spy?

[HorneyMX5]

Cheers and yes indeed it's a Speedhunters stip on the windscreen.

[HorneyMX5]

A couple of recent photos: