Mini Turbo 120BHP Rolling Road Tune- The Leafster

[Leafster1973]

@histicamente1 The Engine has a special sealed SU Carb from the Leyland MG Metro, with a dedicated plenum chamber. The turbo blows through the carb, The fuel pressure within the carb is kept 3psi above boost pressure by the aid of a fuel pressure regulator controlled by the boost.

[wickiezulu]

Fwiw, I read that the MG Metro Turbo was originally intended to have 120-130 bhp though the gearbox was not up to the task, which led to being detuned to 93 bhp.

Btw, I was thinking of dropping a 1.3 A-Plus engine into an Innocenti Mini DeTomaso shell and was wondering what would be a suitable lasting gearbox if I went down the Turbocharging route in order to reliably get the sort of figures the Metro Turbo should of been blessed with?

[Leafster1973]

@wickiezulu If your going A series Turbo, then an uprated Gearbox is a must for reliability. Centre oil pick up pipe, Cross Pin Diff, uprated Gearbox bearings. Straight cut gears are very noisy for a road car.

[Leafster1973]

Head Gasket was a quality Copper type. I was running quite a low CR as we opened up the chambers in the head, but never used go silly on the boost!

[gabylea1994]

eyup mate what make of head gasket you got in your as iv got a copper one and it dint seem to last 2 minutes!?

[Leafster1973]

@gabylea1994 This is copper gasket. Check your Compression Ratio is not too high. This engine was lowered to about 8:1. and the head and block were skimmed before assembly

[Leafster1973]

It sounds like it revving more than it actually is. The redline was set at 5500rpm and Dave the dyno operator would never take the rpm higher than the engine felt. Considering an original Morris Cooper 970S revved to over 9000rpm standard this is quite tame! So you see, the Mini was more than happy on the rollers, Intercooler, Oil Cooler and uprated rad made sure everything ran just right.

[themordamoja]

For a mini fan, it sounds like you are cruel and you are going to kill the mini.

Buy different car, thats m y advice.

[detroitbluesguy]

I'm impressed! I like blowers , but they are both good ways to pack a combustion chamber..and that's how you make real power. Also i'm making a kit to install bmw 325 seats in my mini..so far it looks like a good cheap way to have the seats mini's deserve. JC

[detroitbluesguy]

can the a engine with only 3 main bearings hold up under all that pressure?

[Alisterwolf66]

Yep, and pretty well too! They all use forged cranks and rods, from the factory - vintage racers will often get these little things spinning well over 8k rpm on otherwise stock internals (save, for forged pistons and better hardware). The castings are very stout, and thanks to the siamesed pairs of cylinders, a short crank.

I'm building a supercharged A+ 1275 myself. Quite impressive on the inside, they are!

[bikerdude96]

u can get tht power out of a 1300cc engine with no turbo i think with turbo and sum fine tuning you could be gettin 180bhp out of tht engine

[beachuk2000]

120bhp in a mini i recon is spot on for it's size and weight. top work

[Leafster1973]

@beachuk2000 Cheers!



[986879]

hi where did get ure car set up ? i live in the south east and hav a turbo'd mini want to get it setup by someone who knows wot there doin car looks good

[autograssboy]

you want to ring tommy i have my autograss mini done there its 01443740798 he does every type of car rally class 7 autograss the lot try him

[detroitbluesguy]

Do you race on grass? sounds like fun. JC

[autograssboy]

did but iam selling my little mini now shame realy but my dad has moved out and i havent got a trailer lisence to tow it :-( you intrested in buying?

[detroitbluesguy]

One mini enough..plus i live in the US..put a tow bar on it and pull it with you..i did that cross country in the US..3500 miles..i was younger and that helps.JC

[autograssboy]

oh lol. yeh maybe but if i get stoped by the police thats it no more lisence lol

[detroitbluesguy]

Can't you tow cars with another car in the UK? JC