[k-huevo]

For anyone the most worthwhile upgrade is in driver education, most of us use only a fraction of the MINI’s potential.

Well executed head work is a great upgrade for beneath the bonnet. Gains can be realized at most rpm and load states, not just when the bypass valve closes. After that is when a header with larger flange ports and no pre-cat can work its best. Some improvement can be had since you’ve upped the boost but the cost/benefit ratio won’t be the same. If you decide to add a header, be sure to address the transition to the cat back so you don’t end up with a power robbing restriction. We’re getting off topic here (sorry MAFFA) but a less expensive alternative to an aftermarket header would be to remove the pre-cat on the OEM and if you get a ported head, the flange ports can be enlarged to match; that is unless the head’s exhaust ports are a mile wide.

[MAFFA]

k-huevo - Don't worry about going off topic as it's all good information to digest I'm loving getting back into the modifying again & a lot of the modifications are similar to the Impreza (if you ignore the SC/Turbo difference) as they are both forced induction.

Not sure i'll go full decat this time as I always hated getting the MOT done at my "friendly" garage about 50 miles away . Was a right pain. I'm thinking cat-back & then eventually sports cat just for the convenience.

Would a 15% reduction require the use of larger injectors then? Would a remap push them too far to keep up with the additional air. Would rather be safe than sorry & don't really want my injectors running at 95% when there is no need. Funnily enough i've a set of 380's in the shed but they're from my old Impreza so i'm sure they won't fit

MAFFA

[k-huevo]

You won’t know for sure if you need more fuel until AFR is recorded up to redline. If you decide to install 380s to ensure headroom, the ECU program should be modified accordingly.

[MINI-Morgan]

Yep the fuel maps need to matched to any injector size or the fuel pressure modified similarly.

[MAFFA]

Yeah I understand that. Still got a FPR & gauge lying around somewhere so could be the way forward. Might just go with 380's anyway to be safe.

I suppose the question then is whether I would need a custom "live" map or whether there are Bluefin maps etc... to take into account bigger injectors?

By the way guys thanks a lot for all this. Loving all the info.

MAFFA

[Snowie]

Do not go down the Bluefin generic map route. Custom map is the only sensible way to go.

However having said that I am still running the standard GP map at 260 BHP - 440 CC injectors and AFPR set up accordingly giving safe AFR at all revs

[MINI-Morgan]

agree... custom map all the way. How does Superchips know how strong your fuel pump is and how your MINI supplies fuel. They blow more engines then they probably get more performance from.

[MAFFA]

Anyone know of anyone trying one of these?

Jon Speed Racing - Premier Mini Specialists - Online Mini Spares Shop & Garage Facilities

Price seems a little too good to be true but then they have been in the business a while so maybe it isn't?

MAFFA