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Mar 13, 2016 12:07 am
Mar 13, 2016 12:07 am
Subject: Re: Tappet clearances - why the variation?
I run my 2 litre with 50 degrees overlap IVO at 20 BTDC, EVC at 30 ATDC With .004 tappets I get 265 deg opening on both cams. This means that IVC at 65 ABDC and, yes, I do get a modicum of "reverse pumping" at revs up to 2300 BUT once over these revs the full effect of the cross flow head becomes apparent and it "sings" You pays yer money and you takes yer choice !
I run my 2 litre with 50 degrees overlap IVO at 20 BTDC, EVC at 30 ATDC With .004 tappets I get 265 deg opening on both cams. This means that IVC at 65 ABDC and, yes, I do get a modicum of "reverse pumping" at revs up to 2300 BUT once over these revs the full effect of the cross flow head becomes apparent and it "sings" You pays yer money and you takes yer choice !