what coil for 2 5s 1975

[David Withers]

I agree with Charles on this.  If the oil is changed at the proper intervals there should be no oil starvation to the rocker shaft.  The external feed kit is a flawed answer to a problem that shouldn\'t exist!

[sent38]

&nbsp;Hi charles & Dizzy took your veiws, and put an oil gauge on to see what the diff would be, and there is not a lot in it. It did not make that much diff with the feed on or off, so I left it on at the moment, becouse on start up I get no knocking at all. Every one say\'s that it dose sound good, so it makes me feel the cost was worth it, it sounds good inside to, on full boar sweet.&nbsp; <IMG>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Pete

[Alec]

Hello all, <br><br>the only way the external feed would starve the crank bearings is if the oil pump were pumping all its oil to the engine prior to fitting the extra feed to the cylinder head, i.e., if the relief valve remained closed. In practice with a sound engine the relief valve diverts some of the oil pump\'s flow directly back to the sump so there is normally suficient oil to spare.<br><br>I did have this extra feed for some time. (I don\'t remember who\'s suggestion it was) The draw back was it sent too much oil to the valves and I would get oil burning at idle. I have since removed it, but only because of that problem.<br><br>Alec<br>

[Alan Chatterton]

Plus too much oil a the top end will make the rocker cover leak like a sod.
The oil feed to the rockers is meant to be a \"splash\" effect, not a river.
Take the external feed kit off..........it\'ll bugger up the bottom end.
&nbsp;

[triumphman]

An external rocker shaft oil feed can be useful, especially if the rear camshaft bearing is worn. (The normal rocker shaft oil feed is metered by the rear cam bearing.) There is (should be!) a restrictor in the head so you don't get too much oil up to the top. It seems to be a bit hit and miss whether you get sufficient oil to the top end or not. My advice is to leave it fitted unless the rocker area is flooded with oil to the extent that it is getting into the engine past the valve stems, which as standard don't have seals fitted. We raced our 2000 for eight and a half years with one fitted - we didn't wear out the rockers or rocker shaft, and we didn't leave a smoke screen!

Just to clarify how the ignition system should be set up (there are conflicting posts earlier) the 2500S has a ballast resistor wire inside the wiring loom, so the coil should be a 6v one. To aid starting, there is a wire that supplies 12v directly to the coil (and therefore shorts out the ballast resistor) when the starter is being operated.