engine build for the new year!
Turbo Mini Forums

hey up everyone, im sorta stumped as to how best to advance in the quest for power. im curently running a 1380 with a T3 and im just intrested to know how far you lot think it could be pushed before the bore size becomes a problem.?
its running standard metro t3 etc at the moment at about 9.4 - 1 CR

im going to rebuild the engine ready for the new season and the aim is to gain some at least respectable times on the drag strip, so either way its going to be a new engine only thing left to decide is weather its worth continuing with this bore size and see whats achievable, or to give up and go the 1293 route?

oh and im in for going to the T2 as well, did i remember seeing someone on here made an adaptor plate to fit the metro manifold? if so id be intrested in one.
cheers
steve.

doh! why did i start messing with it!

I would not worry too much about bore size, I'd say what you need to do is get the CR down so you can use more boost pressure. I'd also think twice about a T2 if staying 1380, I know a few of the lads who do run 1380's were finding the 0.25 exhaust housing metro T3 restrictive.

ah right i'll stay clear of the t2's then, im probibly going to have to rebuild the t3 so was just looking into alternatives.
ive got a rough budget of £2000 for the new engine (once i go rob the bank) so im just after the best i can make realy.
anyone had any experiance with the acralite? forged pistons from avonbar? i noticed they do up to 18cc in 73.5mm

doh! why did i start messing with it!

T3Tone and turbo hogster are the 1380 boys on here, I'd wait for them to see this thread........

What pistons are you using at the moment?? Definately agree with the exhaust housing, use the 0.36 one if you need a rebuild. I run a c/r of 8.3-1 and for the last couple of months of last year i was running 14psi giving me 178 bananas. Cant really say how far you can go with a 1380 and hope to never find out

-MINI CLUBMAN 1380 TURBO-

I think the bore size problems are mythical tbh!

Here here Alex. bore flex my a*se!

-MINI CLUBMAN 1380 TURBO-

i did run 10 psi on a 9.8 cr which gave 140 at the flywheel, now changing cam to a 276 ( which i had sitting on my bench doing nothing) and lowering the cr to about 9.0 to 8.8 to 1 and hopefully run 12 psi to see what happens.

but i did see a difference when using the .36 exhaust housing instaed of the smaller .25 one.

i would stick with the 1380 until she is shagged then go for a 1293.

but thats my opion.

you do find the 1380 over the 1293 is a bit more torquier down the bottom.

always looking for them bigger bunches of bannanas

lol! 178 bannanas would do me quite nicely! erm its curently running omega 11cc pistons, but they've seen a pretty hard life up to now so i dunno if id trust them to stay put at that sort of power, well the curent engine spec is this:

standard head (i have a good howely one but its in need of some valve guides), omega pistons, kent 266 cam, hardened crank, ballanced with rods etc, full u/l flywheel, grey clutch, tran x s/c drops, s/c gears and a x pin diff. running at about 9psi on standard(ish) CR

it made pretty good power dunno exactly what because i never made it to a RR but it made the n/a 1380 it was built from feel like a 998 lol.

yeah i ran a 1275 lump with a stg 3 head and about 10psi before this engine but even with a standard head on, this 1380 seems to pull a lot stronger for the same boost pressure.

right so next question is, how do i best find the extra CC's to get a lower CR, do i keep the howely head and go for a deeper 14 or 18cc piston, or will the omega's be up to the job and a turbo specific head be a better buy?
cheers
steve.

doh! why did i start messing with it!

if your really that paranoid about the pistons the only thing to do is to whip them out and check them. Check for ovality, gudeon pin movement, ring clearance and gap, severe scuffing and of course visual det damage. if they are the cast ones they'll probably be good, they tend to be very good and last a long time as well as coping with some extreme rpm and c/r. The forged ones would probably be toast if they've done mileage.

I've seen the future and tbh its Pie

yes bore flex isnt a problem on the A+ engines
as many peeps thought !

this is the route i will be going shortly
also with accralite pistons from mr avonbar.

im going for 25cc head which im working on at the moment, but you can get a bigger cc head done at most places like morspeed ect.
the 266 should be fine.

so get the head sorted strap it on plump in the intercooler, go to a decent rr get it set up then you will be away.

always looking for them bigger bunches of bannanas

I run the cast 11cc omegas with no problems so if there still in good enough shape, keep them and as hoogy says get a head chambered out. I am also changing my cam to the kent 266 this year:)

-MINI CLUBMAN 1380 TURBO-

lol sounds like a plan then, i checked my pistons over today and they seem to be alright for the time being so they can soldier on for a bit longer yet. ive found the 266 to be spot on, the car pulls very well all the way from 1500 - 6000+ and will pull from 30mph to 100+ in 4th no probs so cant complain about it realy.
steve.

doh! why did i start messing with it!

well the only real worry i have with the pistons is with the center two, last year when the engine was still running n/a the oil pump gave up and i didnt realise because the oil pressure switch either wasnt working or wasnt wired up right so anyway the crank was pretty nackered after that, the mains on 2 and 3 wore out so badly that the crank must have flexed and the pistons on 2 and 3 manages to hit the head, not badly but enough to leave a very very slight mark on the top of the pistons, the marks came off with a quick rub of some pollishing paper but i wouldnt like to trust them at much more than standard boost. if the cast omega's are up to the job i'll just get another two to replace those and save myself some money.

doh! why did i start messing with it!

you is a nutter.

lol yeah! i look forward to seeing it, hopefully i'll make it to avon this year, and the minis v beetles thing. thats my deadline to get the car back on the road anyway. its mot'd and taxed till october i think so once the engines rebuilt and the shell freshened up theres nothing stopping it!
just out of curiosity what sort of 1/4 times should i hope to see out of it if i manage to get to the 170 banana mark? its on 10's and running a 3.44 diff at the moment if that will help me atall!
steve

doh! why did i start messing with it!

sub 14 sec

lol i'll probibly manage 16 then, will have to get some practice in
steve.

doh! why did i start messing with it!