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MG MGB Technical - Stage 3 head

As noted earlier my 1975 gt has a stage 3 head and I was unsure about the tappit clearance. I now understand from a previous owner that the engine has a standard cam; anyone know what the correct tappit setting should be?
R E Merrall

It would be ,015"standard. Sometimes a performance cam may be designed for a different clearance, but its the cam that dictates the clearance. Denis
Denis4

Thanks for that, I have been nervous of tightening it down too far and causing damage.

Rod
R E Merrall

.015" measured cold.
Paul Hunt

Anyone know why the previous owner might have wanted a stage 3 without a modified cam? Would the standard cam give enough lift to take advantage of the head?
R E Merrall

The standard cam is considered one of the better designs on the market. Hard to improve on and keep driveability also. RAY
rjm RAY

Fairly easy to change the head. Cams more involved.
How sure are you it's a stage three, that's track day kit.
c cummins

Very sure it is a stage 3; have receipt for fitting by oselli. Any disadvantage with standard cam for road use?
R E Merrall

I am delighted with the Piper HR270 cam in my car. Peter Burgess actually recommended the HR285 but I felt for road use I would go for the less aggressive one and it has kept the nice easy idle and effortless torque from 1000 rpm that we love about the B series engine and miss out on it ripping up to the redline.
Stan Best

I've been running the 285 cam for over twenty five years, along with a ported and polished head, and can attest to the performance increase and smooth idle as well. RAY
rjm RAY

x2 stan. i have 270 with Peter's Ecotune head.
FYI Peter told me to set tappets at 16 inlet and 18 outlet.
G
Graham Moore

This thread was discussed between 19/09/2015 and 04/10/2015

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