What are some of the best ways to get substancial HP. (excludes motor conversions)
e.g I've heard of the BMW motorbike head and the 7 port head.
What are the options and your opinions.

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Morgs

Forced Induction!!

If you want big HP numbers... turbos the way to go!

I have a penchant for a supercharger on the ol' A-series tho

Thats the way I'm headed

My 2 cents is SUPERCHARGER not turbo that way u don't have to wait for the power/boost

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Respect mine and I'll respect yours.

spent squillions on your engine and wack a super/turbocharger on it

What is your aim?

You must have an aim.

HP? And big HP at that?

stroke it, or boost it.

Buy a Honda

damoke is on damoney

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Bore it, stroke it, add NOS....

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I'm more talking about the bolt on side of things instead of boring etc.
What about all the heads they make 5 ports and so forth, worth it or
too expensive.

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Morgs

who makes?
expensive versus what?

Big Heads you would go for, and have many options. Spend say $1500 on a Head opened up by one of the proes that suits your Engine (850/998/1098/1275) You can also go as you have mention 7 Port heads/ Alloy or even the BMW head.

But If you are going to the extent of Getting big numbers, You will want to do as a SC or Turbo Also as below. If you don't the next weakest link will brake then you will have to rebuild the motor later anyway.

You will won't Your Box checked and anything weak or sus. With this you should also do you Crank Bearings, the bores and pistons rings and rod's. Not to forget you will want a nice Cam

These have all been coverd in many threads which should be easy to find. Supercharges and turbo's are also bolt on and will cost you just much more again

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Stop Licking the Dog...I Don't Care Who Started It

"What about all the heads they make 5 ports and so forth"

Ahhh them new fangled 5 port heads

I've just tried waking up the 7 port head thread, but no takers yet....

If "The Fast and The Furious" is anything to go by, your Mini will descimate all with overnight parts from Japan.

Other than that, first thing to do is to reach deep into your pockets and see what you come out with, make your decisions from there

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-Wasabi
1972 Clubman - Daily Driver
1962 850 - EW1 Powered