Enlargeing inlet ports
Turbo Mini Forums

Ive noticed that my ports on my head are larger then the ports on my inlet manifold, would there be any advantage to inlarging the bore of the inlet?

It should improve the airflow but im not sure if it will cause any problems with setting the carb up etc?

If it is possible is there an optimum size to go to?

Cheers Matt

Edited by matty on 22nd Sep, 2006.

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1/4mile in 13.2sec @ 111 terminal on 15psi

would it make that much difference when you have 12psi shoving the mix through?

I guess any flowing or increasing of port size can be good.

I tickled the edges of both my manifolds out to payen gasketsize,which are the same as my grp A head

Metro turbo weekend driver,Mini turbo in the making again!

be very carefull in touching the turbo inlet manifold as .....
British Leyland have done there home work on this one and have it just ...Spot On!

if you play around with the port sizes on the head & manifold inlets too much!

you will run into port velocity which will make your motor untractable at low speeds, a compramise is the goal for you here matty

i am only scratching the surface here but please take my advice

the mods we taked about are the best in terms the above