Piston Dilemma.
Turbo Mini Forums

It's engine rebuild time again. Having not had to remove the engine for the last three, nearly four years now has been great, but it's time to give it a rebuild. It's run a minimum of 10psi but has been running 20psi for the last two.
I've just changed jobs & am on a shit wage at the moment so money's tight.
So i need to decide whether to stretch to forged items again or whether a good cast item will do the job.
I may have to go with a cast set as i really don't know if i can afford £450 for forged ones.
I know the stock Metro Turbo ones will take 15psi, i'm guessing the cast Omegas are a similar quality ? Any suggestions, before i rape my wallet ?
I know this has probably been covered but i wanted some up to date suggestions.
Oh i'll be going 1310 +0.040".

Cheers
Phil.

WWW.TURBO-MINI.COM

i belive some of the bigger power boys are using MEGA pistons from MS with some high power figures, i belive one is in the 180's whith quite alot of boost

Edited by Paul R on 17th Jun, 2008.

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

I'd get it in bits and assess the state of whatever is in there before getting too excited about buying new pistons.

Yeah, but wasn't there a problem with them ? Did MS sort it ?

WWW.TURBO-MINI.COM

go for OMEGA cast ones phil well proven and around 270 billys

i've been using the cast AE ones 21253's for the past 3 or 4 years now and i can't fault them. been running 10psi minimum and 15psi quite often, been up to 20psi a few times with no issues either.

they're the proper budget jobbies aswell, something like £180 a set from morspeed dished out to 13cc.

what about the ausie hypatec ones ? cheap as chips
will h runs these with mass revs and boost no issues

phil as tom says have a look and see what state your bores are in.

if they are ok then just rehone , new rings and bobs your uncle.

or do a drop test on the pots they made be ok any how.

the main prob with the turbo mega range is the ring packs are crap.

the comp rings seem ok with 14-16 thou gaps but the oil control are way to big at 40 thou.

and i dont think its sorted yet to be honest.

always looking for them bigger bunches of bannanas

Im sure a lot of us would donate a pound each to see pics of your sister

Vegard and I would donate atleast £2 each

2 pounds of what nic ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

my dilemma is another
what is better , 14cc piston and a head with more cc, or 18cc head and a head with less cc?

Daniel

i was thinking the same thing the other day aswell. which way would give you better squish?

Hi,
People have been running pistons a good way down the bore, so I don't think squish is much to worry about?
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

I'd personally go with the bigger dish pistons and be able use a better chamber design in the head.

WWW.TURBO-MINI.COM

yep thats what i did phil , id run the omega cast , if i was in your situation .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM