Guest ntc Posted January 16, 2014 Report Share Posted January 16, 2014 I must have been fitting the Ractorations tank wrong then for the last 20 years,never had to empty one just an annual wipe out Quote Link to post Share on other sites
Badfrog Posted January 16, 2014 Report Share Posted January 16, 2014 Neil's last post makes me rest my case . Paul, the word on the catch tank is a volume equal to the engine displacement, sez Kas Kastner. Then, 2L for a TR2/3/4. Badfrog Quote Link to post Share on other sites
Guest ntc Posted January 16, 2014 Report Share Posted January 16, 2014 JF you got it Quote Link to post Share on other sites
Paul Harvey Posted January 16, 2014 Report Share Posted January 16, 2014 At least we agree on that then As we know, most of the aftermarket catch tanks are too small which is why the specialists supply larger ones made specially to fit the room available in a TR. I would be interested to hear more support for Badfrog's technical arguments about the inherent blow back from the fuel pump orifice. This is the new element in the debate. Quote Link to post Share on other sites
Guest ntc Posted January 16, 2014 Report Share Posted January 16, 2014 Paul The fitting of the pipework is vital as Stuart knows how I do it , if I can get the scanner to talk to the computer I will do a drawing Quote Link to post Share on other sites
monty Posted January 16, 2014 Report Share Posted January 16, 2014 Paul The fitting of the pipework is vital as Stuart knows how I do it , if I can get the scanner to talk to the computer I will do a drawing Well I fitted mine exactly as Darryl instructed & agree that my tank has not really needed much cleaning in 3000 miles. Quote Link to post Share on other sites
Badfrog Posted January 16, 2014 Report Share Posted January 16, 2014 (edited) Good gracious me, Lark, Lark ... And me advocating respect of the origin in the first place. Really thought it was gonna be the end of it. Nevermind. Badfrog ... Pipe work ... Now the Campbells are coming ... Edited January 16, 2014 by Badfrog Quote Link to post Share on other sites
tonycharente Posted June 7, 2016 Report Share Posted June 7, 2016 (edited) Hello to all, TR4A PVC BREATHER SYSTEM I came across this excellent topic as I am contemplating fitting the same PVC breather system as on my TR4A to the Jaguar XK150 FHC I treated myself to last year (with my cashed in pension money !!!). Being a 50's car, the crankcase breather on the XK150 just vents down onto the ground. My TR4A has a brake servo, whose source of "vacuum" (well, negative pressure really) comes from being connected to the same inlet manifold "port" as the tube coming from the PVC, via a "T" piece, which I think is the normal way of doing it on a TR4A fitted with a brake servo. Having studied my TR4A there are three things I don't understand, and I'm hoping that someone will be able to explain them to me, please. The first is that given that on the TR4A the PVC breather system is connecting the inlet manifold downstream of the carbs [whereas on many (most?) other cars it's connected upstream of the carbs], doesn't that impact the mixture at that end of the inlet manifold since the engine is able to suck in air from the crank-case? The second is that given that the brake servo is also connected to the air in the crank-case, doesn't this arrangement reduce the "vacuum" available to the brake servo? Finally, what does the PVC valve actually do? Is it to stop positive pressure heading towards the carbs? Hoping you can help! Many thanks Cheers Tony Edited June 7, 2016 by tonycharente Quote Link to post Share on other sites
RogerH Posted June 7, 2016 Report Share Posted June 7, 2016 Hi Tony, look at post #28 (page 2) it explains how the PCV works. Basically the high tick-over vacuum cuts off the PCV thus not affecting the mixture. At high revs the PCV works. The ratio of clean air and crank case air is such that there is very little problem. Roger Quote Link to post Share on other sites
stuart Posted June 8, 2016 Report Share Posted June 8, 2016 I would be inclined to drill a separate take off for the servo. Stuart. Quote Link to post Share on other sites
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