turbo engine vs na mg metro engine??
Turbo Mini Forums

hi

im just wondering how much differnce there would be in the following engines.

a turbo engine running 7psi all the time with a t3 and a 3.1 final drive, and a standerd mg metro engine but with a 3.1 final drive.

would there be alot of differnce in performance and drivability?

would they be about as reliable as each other?

i ask this because im thinking of making my na mg metro lump which im going to stick in my runaround once iv rebuilt the box, to a more or less standerd turbo engine.

what do you guys think?

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

Much more low down torque and about 20-25 more banannas from the turbo.

I think turbo's make the best road engines in a Mini, especially as they make short work of a 2.9 / 2.7 final drive!

I moderate boost, high CR turbo lump will be great to drive on a daily basis.

Every day is a school day ...........

How fast and how expensive ...... the same question...

i think i might have to live with my 998 lump for a bit longer then and collect a few basic bits to convert my mg lump to a turbo one!

should i go for a 2.9 or a 3.1 final drive then?
iv got a 3.1 fd in my sccr box waiting to go on the project mini.
iv also got a 3.1 fd in a spare box and a 3.44 in another spare box, it makes sence to me to use a 3.1 as i already have one? or would it make it much nicer to drive with a 2.95? i have 10" wheels

im going to get the cr down to standerd turbo spec and maybe just use the phase 2 cam as i have one in the shed doing nothing.

i dont want to spend to much on this build as im still building another mini as a fully blown flying machine! (thats the plan anyway lol!!)

iv done a search and the only thing i need to do to the actal engine is to get the cr down by opening up the chambers? pistons etc should be able to cope?

i know about the other bits like turbo carb, return fuel lines, bulkheadbox etc etc

sorry for all the questions but im realy liking the idea of a low blow turbo runaround mini!!

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

3.1 will be ok, 2.9 better on the motorways etc. Like so much else depends on what your going to use the car for most!

Every day is a school day ...........

How fast and how expensive ...... the same question...

Metro challenge cars only run 5psi...if thats any gauge in performance.

Shall see you at Combe Rob.

Edited by Jason G on 13th Sep, 2007.

iv decided!!

im going to do it but im not going to take any bits iv already got for the project! lol apart from the phase 2 cam.

just so i can sort out what i want my chmabers in the head to be, what size dish does a mg metro pistons have? and what cr is a standerd turbo lump? 9.4:1 isent it?

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

my thoughts are the same as rogers and roh H

the metro challange cars what that jon flan and his fellow guys run is..... 8 psi

steve i will be in touch soonish about sorting my head out and maybe a manifold or two!

ill email you when i know what im actoly doing.

what cr should i get it down to? 9.0:1 so its a bit more aceptable to slightly higher boost? and what dish does the mg pistons have (non turbo)

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

I quote from regs....The actuator setting is 5.0psi for 0.015" (0.38mm) of actuator rod movement.
Must admit, there might be more to the measurements that I'm aware of. :(

Edited by Jason G on 13th Sep, 2007.

mg pistons dont have much dish at all. got a block minus head in my hall but cant be arsed to measure. at most id say 8cc. CR was around 10:1 IIRC