MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGF Technical - HGF Head Skimming

Is it true that after the head has been skimmed the engine will have a noticable change in BHP ?
D. Moss

Up or down??
Mike

You would need to skim an enormous amount off to make that much difference and I would imagine that if it required so much skimming the head would be knackered!

Ted
Ted Newman

skimming the head will give a slightly greater compression ratio, which could give more power with apporate fuel and mapping. Skimming for HGF does not take off this much, and there are tolerances after which rover say the head is scrap, where this may not be true, you may need to change the ECU to use it.
Will Munns

It's a far cry from the days when I skimmed 105 thou off a £10 head from the scrappy for my mini on a shaping machine at Uni,

Yeah that's over a 1/10 of an inch!

and after some serious jiggerypokery with the carb it delivered a MASSIVE increase in horsepower (from perhaps 44 to, I dunno 54... )

peformance was radically altered as was the way the engine delivered this, but at all in all it's still only 50 something horses!

I sold the car to an undertaker, and Bought an Alfa which was in a different league of performance!
Neil

But, higher compression ratio means you can get more power from higher octane fuels like optimax, but you won't be able to use normal fuels.
Will Munns

>>It's a far cry from the days when I skimmed 105 thou off a £10 head from the scrappy for my mini on a shaping machine at Uni, <<
me too ...
I then had to put 5 star in - but I doubt the car had more than about 40BHP even then ('twas only an 850) !
Steve

This thread was discussed between 23/05/2004 and 24/05/2004

MG MGF Technical index

This thread is from the archives. Join the live MG MGF Technical BBS now