12 replies to this topic

[Minigman]

So if you were building the ultimate track day engine which was well mannered enough to be driven on the road too, what would you build. Budget around £10-12k.

5,7 or 8 port?
Stroked?
Turbo’d or supercharged?
Straight cut box and drops?
4 or 5 speed?
Cam?
Carb or injection?

Opinions please.

[KTS]

I'd be looking at injected 16valve options, standard stroke, but nicely worked crank/con rods etc., no straight cuts for me unless it's purely a track car, but definitely the S/GT gear set.

[Maccmike8]

8 port, throttle bodies, 5 speed. Yum.

[Quinlan minor]

Save a little more and get a supercharged Vetechbusa motor.

[timmy850]

If you're not building it to a particular track class, and with that budget I'd almost go with a full engine swap like a Honda B series. A near standard engine will give you plenty of power, reliability and road manners...

[bpirie1000]

16v either k100 or kad. 1330 block. (1380 to far to be reliable....)
Throttle bodies inj or carbs from bike.

Gears 4 is sufficient.

Old school cage italian job style down centre window...

Simple humble man canna have all the fancy stuff.....

[IronmanG]

Rotrex

[nicklouse]

What every you go for it has to have injection and electronic ignition. Both fully mappable.

[Minigman]

If you're not building it to a particular track class, and with that budget I'd almost go with a full engine swap like a Honda B series. A near standard engine will give you plenty of power, reliability and road manners...

Oh dear Timmy - not much A series excitement there mate.

I’d never fit a Honda engine in a mini, I’d buy a Honda.

A near standard engine is like a snail. My 1330 97bhp engine is fine on the roads but dull on track.

I’m looking to really push the boundaries here. I’m nearly 50 so still have some get up and go before I retire into an old 998 :)

Edited by Minigman, 10 June 2021 - 08:09 PM.

[Dusky]

Guessing an 8 port 1600cc with fully mapable ignition and i kevtion would be the ultimate of the ultimate. Imho, not worth it.

[Tupers]

A BMW K head engine would be awesome but they start are £12600 Specialist Components and an injected 8 port will cost you over £5000 in parts alone.

If I had that sort of budget and was building it myself I would be looking at
£3800 MED multiwed crankshaft kit
£2022 Specialist Componets 5 port injection
£1100 A really nice head
£210 Russell Engineering RE13PP
£360 Forged 1.4:1 rockers
£720 Mini Spares heavy duty helical gear set
£750 Quaife ATB

£8962 total leaves room for machining + bearings but might be a bit tight depending on if you can carry your current clutch and flywheel over but it’s what I’d go with.

[Turbo Phil]

You could build a fairly mild turbo A-series making 130hp and a similar amount of torque for far less than anything suggested above. It would be completely street useable and make more torque than any NA A-series.
No fancy cranks, rods or heads needed. A decent ignition only ECU and a single HIF44 would keep it simple, easy to tune and reliable.

Phil.

[timmy850]

If you're not building it to a particular track class, and with that budget I'd almost go with a full engine swap like a Honda B series. A near standard engine will give you plenty of power, reliability and road manners...

Oh dear Timmy - not much A series excitement there mate.

I’d never fit a Honda engine in a mini, I’d buy a Honda.

A near standard engine is like a snail. My 1330 97bhp engine is fine on the roads but dull on track.

I’m looking to really push the boundaries here. I’m nearly 50 so still have some get up and go before I retire into an old 998 :)

Well to be fair you’d left your criteria a bit loose!

Are you going to be using the engine in a round nose body? Are you happy to cut holes to fit turbos/intercoolers/twin cap heads/throttle bodies/carbs? That will limit your choice too