CycleSi

Charles Dunn Motor Engineers in Wooburn Green are definitely worth contacting about this (01628 528338). I dropped my R500K off there only this morning.

That looks like the underside of my 6 speed box. Redline MTL 75w80 works best for me.

Another vote for Rob @ Ratrace. He built me an engine 5 years ago (1.8 K making 237bhp/163lbft) and it is still phenomenal !!!

Actually, Troy can access/unlock MBE ECU's too. He did mine and mapped it perfectly. That said, I have also used Steve G/Luke S and they are equally excellent. You're in good hands with either.

Don't go too stiff; especially on the rear !!! Simon Rogers will tell you "some roll means more grip"

I have got Nitrons on my R300 and it's a doddle to adjust both front & rear. You don't need to remove the rear wheels. You can adjust the clicker with everything in place on the ground. FYI, I run the fronts @ minus 14 from hard and the rears @ minus 18 from hard on the road and I find that spot on; stiffening them up 4 clicks for track days.

I fitted a Pace dry sump kit to my R300 with a 237 bhp 1.8K and have had no problems at all. Pace sold out to Neil Brown Engineering a while back: https://www.pacepumps.co.uk/dry-sump-kits

@Doc007 - the reason I suggested Surrey Rolling Road was because you just said you just wanted a power run and didn't mention mapping/tuning etc. I had my R500K mapped by Steve Greenald at Team Leos and they were excellent, but a power run and mapping are two very different things hence the two different recommendations. Hope this helps?

Not that close, but highly recommended: http://www.surreyrollingroad.co.uk/index.php

For those of you having trouble contacting/finding Rob @ Ratrace he has recently moved premises. He is now in Barnet EN5 2AG - this postcode will take you straight to him. He is contactable on 07956 269605.

Been out for a 100 miles or so this morning and it is definitely smoother/better left disconnected, so unless anyone tells me otherwise that is how I will leave it. Thanks for your input chaps.

It has been at this tuned level since 2018 so it is not recent.

@ David - I have now fitted a new sensor and it is noticeably better, but it still has a much smoother idle when disconnected so I'm tempted to leave it disconnected. I guess my concern is will it do the AFR any harm in terms of running lean? You said it only 'fine tuned' the map settings so I'm thinking it shouldn't have much of a detrimental effect, but please correct/educate me if I'm wrong. Many thanks, Si

Thanks Amos and David - that all makes perfect sense to me. I have ordered a new sensor and will fit that; but if it still idles better without it connected then I'll run it that way. I'll let you know my findings accordingly.

Got a 2002 1.8 R300K Superlight (but Ratrace Motorsport rebuilt and tuned to R500 232bhp spec) with Roller Barrels (balanced & optimised) and a MBE 967 ECU. The idle has always been a little erratic and less than smooth. Whilst playing around with it today I discovered if I disconnect the plug from the intake air temp sensor which is in the roller barrels back plate, the engine immediately smooths out and maintains a rock solid idle speed. Plugging it back in makes it run noticeably less smoothly. My questions are: 1) Can I leave it permanently disconnected and/or will it do any harm. 2) Should I simply replace the sensor with a new one? TIA, Si