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4.0 Uprated pistons.
Posted: Thu Feb 07, 2008 3:32 pm
by TVRleigh
Are there any uprated 4.0 pistons with cutouts. that are not going to cost the earth.
Or should I just get the stand ones cut.
Thanks
Leigh
Posted: Thu Feb 07, 2008 5:04 pm
by CastleMGBV8
Leigh
You probably don't need to have valve cutouts, what cam are you thinking of using and which gaskets, tin would increase the compression by approx .5/1 and if you are not going for too much lift you should be ok.
Worth checking the piston to deck height when doing a test build and if they are up to 30thou down the bores could be beneficial to have the decks machined to bring the pistons 5-10thou below the decks and then check the valve to piston clearance to determine whether you need to put cutouts in the pistons.
Kevin.