----- Original Message -----
From: "T.R. Scratchings" <wob@dandrade.freeserve.co.uk>
To: "Chris Kantarjiev" <cak@dimebank.com>
Sent: Thursday, May 01, 2003 10:38 AM
Subject: Re: external oil feed tidbits
> Oil down inlet guides will pollute the inlet charge & reduce effective
> octane, aside from the enormous consumption suffered when using roller
> rockers with low back pressure. The best solution is to use valve guides
> incorporating a seal on the inlet, then allow oil to splosh everywhere
with
> abandon. Keeps the valve springs cool and longer lived. You'll still get a
> puff of smoke at start-up from oil that's run down the exhaust guides
whilst
> at rest, but none in running. The 4A also benefits from retro- fitting the
> open crankcase breather from TR 2/3/4. BTW the main restriction to flow is
> already there in the shape of the vertical feed hole to the rocker post.
> ----- Original Message -----
> From: "Chris Kantarjiev" <cak@dimebank.com>
> To: <fot@autox.team.net>
> Sent: Thursday, May 01, 2003 5:30 AM
> Subject: external oil feed tidbits
>
>
> > I've run an external oil feed on my Triumphs for a while; when I got my
> > TR4A, one of the first jobs I did was replace the rocker bushes because
> > they were so worn I couldn't get oil pressure. I vowed never to have
> > that happen again.
> >
> > But lately I've been getting a bunch of oil in the exhaust, especially
> > just off idle. Watching the rockers through the oil filler, I saw big
> > squirts of oil coming out of the rocker feed holes. My working theory
> > is that this is too much oil, leading to oil vapor that's getting
> > sucked through the PCV.
> >
> > I had heard, some time back, that one really wants to run less oil
> > than is supplied as stock - and that to do this, you get a banjo bolt
> > that has a smaller feed hole. I was pretty sure I had done this,
> > but I wrote to Moss Europe/TriumphTune to confirm. They told me I need
> >
> > Restricted UNC Banjo Bolt for R/Feed
> > Part Number TT1026D
> > Cost # 5.24
> >
> > I tried to get them to tell me the critical dimensions of this part, so
I
> > could check whether I had it in place ... but the line went dead, so
> > to speak. Oh well.
> >
> > Tonight, I dug in and took the line off. My intent was to remove it
> > completely, and I did. I also found that I already had the restricted
> > feed in place - at the head.
> >
> > I put back the original screws. Hey, these aren't the same length? Parts
> > book seems to indicate that the short one goes in the head, which makes
> > a certain amount of sense.
> >
> > Start up - no visible oil at all. Damn, I don't want that.
> >
> > Light goes on. With the restriction at the head end, the full volume
> > is being pumped into the hose, and coming out at the head end at
> > higher pressure since it's got to move through a smaller hole.
> >
> > Put the restriction at the gallery end.
> >
> > And indeed, that seems to have worked. I'm getting a nice puddle of
> > oil on top of the visible rocker, but no squirting.
> >
> > Definitely seems better. Tomorrow I'll see if the oil smoke is reduced;
> > I sure hope so!
> >
> > chris
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