MX5 Questions

[tuscan_thunder]

Delighted with the MX5 (both me and the better half -its hers really) but a few quick questions:

Its a UK 1.8 (1997) - I presume its mapped for 95octane, but it certainly seems to pull harder when running on Optimax, especially around 3500-4000rpm. Is it my imagination or do others find this to be the case? Would it be worth dropping in some Millers CVL once in a while? Would a change of plugs make much difference to the running? The plugs seem clean with no deposits.

In terms of a cat-back exhaust, is there one which is clearly the best? If not, what would be a good one to go for?

I fancy getting a a half roll cage for behind the seats - who stocks this and how much does it cost?

Can I get a strut brace (off the shelf) for the rear?

Many thanks in advance

[tuscan_thunder]

tuttle said:

Optimax or similar, certainly won't do any harm. May be worth re-setting ecu just prior to a re-fill, it may advance the timing a notch or two. With regard to Millars CVL. Possibly worth trying a flask or two, I use it on a turbo engine & mostly for spirited drives/trackdays etc when the weather is hot, tiny but noticable mid-range performance gain, but mainly use it because (esp in hot weather) I get much safer knock/pre-det readings. With the plugs, if they look healthy enough, they probably are- apply the 'if it ain't broke, don't fix it' rule of thumb,imo. Enjoy! MX5 is a great little B-roader

Thanks for all the replies guys,

Is the ECU re-set done by disconnecting the battery and leaving it for a while?

I think a roll cage bolting onto the strut tops is the way to go and maybe an exhaust will follow but an induction kit might be better (noise under acceleration but not so noisy when cruising)