530 replies to this topic

[minilee94]

Spi cooper block offset bored to 1380
Omega pistons
Arp bolts
Acl bearings bottom end
Piper 285 cam
Alloy vernier timing gear
Chilled iron followers
3 piece alloy push rods
Center main strap
37,29 valves 12g940 head (stamped 12g938)
Polished ported
11stud head ,double valve springs
Big valves
Weber 45 carb
Straight 6 inch manifold
Stainless polished manifold
Brand new x drilled nitrided , balanced crank
Med stage 2 clutch and flywheel ap bonded and riveted clutch
Straight cut gearbox , x pin diff , 3.44 final drive
11.1 compression ratio
Roller rockers
Hi torque starter
Aldon yellow distributor
Lucas gold coil
Med alloy crank damper
Turbo oil pump
Thermex alloy rad
Hi cap water pump
Electric fuel pump
Sytec fuel reg


All I can think of might of missed some out

Edited by minilee94, 27 January 2015 - 10:38 PM.

[The Matt]

Yeah. Pretty similar to my last 1380. I had the leaded head with bigger exhaust valves and Megajolt was the only real difference.

Never got mine on a rolling road though.

[minilee94]

Yeah I can't have a unleaded head due to my valves but I use millers lead additive

[Alex_B]

How much did you spend on your crank? and where did you get it from? I am currently pricing up my big engine build and I need a crank thats capable of about a 9k redline (going bmw 16valver) and I think my current crank needs replacing due to the old flywheel ruining the tail. Thanks! 

[Midas Mk1]

It is possible to have unleaded inserts, by 37,31 head has them :) 

[minilee94]

All the company's swiftune , med etc have all said you can fit them but run the risk of them overlapping there selves or something and can fall out that's why none of the company's sell head with unleaded inserts in head with bigger valves like mine

And all engineering firms I spoke to about getting them fitted all refused to do it

And my crank I got cheap off a mate as he was building a turbo and didn't finish it and he then bought a med crank for his 7 port build
But new when I spoke to minispeed would of cost him about £500

And if your going to be redlining like that fit the med crank , nitrided x drilled , wedged crank about £495

[Alex_B]

Excellent, I will look into that, thanks! 

[minilee94]

No worries they fit that crank in all there race engines

[MJWarren]

Excellent, I will look into that, thanks! 

Revs kill the crank, especially 9k on a 3 bearing crank. I'd suggest steel crank and rods and some nice light Pistons. Which would be a lot more than £495

[summs116]

i had a med crank and its good for 7.5k then it start to flex and touching valves on close tolerance engines.steel cranks the only option really. my sc3 swifty one been ok so far in my miglia 

[minilee94]

If it don't spend it's life at 9k though should be okay surely

[Alex_B]

If it don't spend it's life at 9k though should be okay surely

If the pistons are touching valves at high RPM then no, any contact is bad. Once valves start touching the valve stems are gunna be stressed and that's just asking for shrapnel in the cylinder! 

[minilee94]

Oh yeah I know that isn't good but I'm saying cranks surely can just instantly be f,d once they have hit 7.5k

Edited by minilee94, 27 February 2015 - 11:01 PM.

[minilee94]

Finally got some proper miglias cheap aswell :)

[minilee94]

Drove the mini ain't the otherday with abit of clear road and does it go ---- yes it flys really didn't think it was going to be that quick