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The H&R use a bilstein front shocks with the same 70N/mm springs. The bilsteins have better rear shocks. So with H&R you get less for more.

If they've just got a thicker crown to raise the compression ratio you could skim them.

Why not go one step further and fit 423? Yes they lose out a bit below 4000rpm but not a great deal. I've seen a graph for the 422. It was a bit better (125lbft) than 423 below 4k but not as good as 421. It will always be the case I think, the more race spec the cam the more you lose out low...

Correct. Correct, power and torque will be dropping off before then so there's no point at all. The point at which the valves will be a benefit will be when you have cams that will need 8000+ to make the power and at that point I'd be wanting to go for a dry sump system, longer rods, finger...

The 423 make power up to about 7800. Will 422 it will be a bit less. I don't know why you want 8000rpm?! Again, why the bigger valves? Apart from saying you've got bigger valves there's nothing to gain. If you've got money to burn it would be quicker and less hassle just to actually burn the money.

The standard valve size is good for more power than 421 give. They won't be in choke so it's pointless. I'd say even with 423 they would still be a pointless upgrade

Great result Oli!

Cam snob! Nothing wrong with reprofiled cams whatsoever. You won't notice any difference in performance or cam life between reprofiled and blanks, all it does is save you money.

You'll need forged pistons or some other way of gaining valve clearance for anything bigger than 421. Piper now do a BP285 cam which is similar to 421s. Its £300ish for them to be reprofiled. I've got the one below that (BP270) which makes 207bhp on mine with ITBs so with the 285 you should...

Losing the 5k kick means you gain more low down torque.

I would send it back for a refund, buy a second hand rs tuner and put the spare £200+ towards something else.

But det can be caused by the spart plug.

I completely agree

Never had anything but issues with NGK plugs on various cars. Some people swear by them, I swear they're s**t. I always use the appropriate temperature Denso plugs. Yours is tuned so I'd go one step colder. IK20 is for the normal Cooper s and IK22 is for the works (197-214bhp), so would get...

180 is length in mm, 50 is N/mm so your conversion to lb/in is correct.

The 3 closest tracks to me are Anglesey, Oulton and Donny. I can't see me going much further afield tbh.

Indeed, they are a thing of composite beauty! Although I have considered making my own to suit the ph1 specifically and take air from the ph1 front grill. I need to have a proper think about it.

Not long then! Much excite! Getting there, taking longer than I had hoped tbh but everything will come together I'm sure. I'll definitely be able to fit in a couple of races by the end of next year.

When is final mapping taking place Oli?

It gives you a lot more length than straight extensions because the angle (see Nick's engine bay) pushes the inlet into the bonnet. Changing the angle and moving it towards the front of the car gives you much more space. For example my total inlet tract length is 380mm whereas the maximum with...

I echo the above. No way you would have 5 mates going to the ring in identical Meganes breaking 8 minutes. Maybe with 5 pro/semi-pro drivers and specced up factory cars though.

I found the system pretty quiet with the cat still in place and the centre silencer. I replaced the centre silencer with a smaller one and fitted a decat, it's louder but still not that loud. I also found that a proper tail pipe is quieter in the car than a stealth system.

@Adeyspec The runner extensions are the standard jenvey SF type extensions, you can get straight and curved ones. I have an alternative method of doing it which would gain you more than 50mm. I also have some plates so you can keep the grill in place but remove the slam panel and bonnet catch.

Mintex ceratec or something similar.

In that case I'd look at the scorpion rs192 a bit more then. Have you listened to any videos on YouTube?

There's other options. Scorpion, pure motorsport, piper and supersprint. All of which get good reviews

it depends which ones you get. We have various ones around the house dependant on the room and the ambience desired. You can get various temperatures and either clear or opaque lenses which can soften the light. LED bulbs are better by far imo

@AlexW Is this the one for the bits I posted today?

It's not when you consider the track is 1436mm on a cup so that gives you 4.5" each side from the ball joint to the outside of the wheel which shouldn't be far off.

@goran You need to angle them. I run 130mm http://www.cliosport.net/threads/itbd-road-track-ph1-titanium-172.682060/page-6