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Rambo wrote:Woooo. Calumny. Big word. Is that Doric for bullshit ?
dapinky wrote: Maybe the yellow cap was okay, but releasing the excess pressure at the correct value, and then the black cap held the pressure higher, causing the tank to explode.
lotusflasherman wrote:Under normal circumstances you shouldn't loose coolant from any cap ... pressure maybe, but not coolant. Coolant level should be at the halfway seam when cold so there's room for expansion - put any more in and it will be expelled when hot.
Quite simple to test a cap ... remove small hose from header tank, insert something appropriate into hose to block it and tighten clip. Get a tyre pump with gauge and a tapered 'airbed adapter' and push it into the header tank tube & 'inflate'.
Pressure will rise until the operating pressure of the cap is reached ... then you'll know if the cap works or not, and at what pressure.
Scott wrote:[ .. make a video!!!
lotusflasherman wrote:Scott wrote:[ .. make a video!!!
A "Please" would be nice .... ... or a
Does this help?....https://youtu.be/_TcjYOmVE2g
Not up to Toby's standard but think you'll get the idea. Didn't really have enough hands to hold phone and do the test and wasn't going to spend much time on it... too much else to do...
I'm using a 240V pump which is great but gauge is rubbish - it reads high when 'ON' & pumping tyres and low when 'OFF', correct reading is about the midpoint between the two so I always check tyres with a digital gauge ..
My black cap is marked as 120 kPA (17.5 psi) and seems to be working about right ... it max 'ed at 25 psi when ON & showed 10 psi when off so midpoint is 17.5 ...
Scott wrote: you are using also a BOV? is it any good at all?
lotusflasherman wrote:Scott wrote: you are using also a BOV? is it any good at all?
Yes, brilliant for me, but depends what sort of roads you drive on. Both my SE's now have Bailey DV30 recirculating type (RDV) that feed dumped air back into the air-filter drum so I can't hear any annoying 'WHOOSH" . My Subarus have had a dump valve on the intercooler as part of the turbo installation and they said it avoids the turbine stalling against a closed throttle - which isn't good for the turbine wheel and then creates a lag when throttle is reopened as the turbine speed has to build again. (Those who say "Most cars with turbos aren't built with a dump valve already inline" are talking out of their... 'exhaust pipes' ... )
First fitted one to my '91 SE in 2003 when I was driving past Bailey's twice a day and called in to have a chat about why Subaru had them and Lotus didn't. I fitted my RDV mainly to enhance the life of the turbo but it seemed to improve the performance a lot as boost was back much quicker for powering out of a corner. I live in Suffolk where B roads seem to follow the edge of ancient fields so lots of short straights and 90°bends and 2nd gear corners, then 3rd, 4th maybe (never 5th) before braking for next corner. The 2 mile run to my village from the nearest A road has 16 significant corners or bends ... just what Lotus were built for..
A few years back I bought another SE, because it was a '93 L Reg, under 43k miles and I haggled a bargain price I couldn't resist. It went very well but didn't seem to get me home from the A road as quickly as the old SE so I 'borrowed' the RDV set up from the old SE and "Boy, what a difference!". I left it on there and bought a new Elan installation kit but DV30 weren't available so started watching ebay and bought a used DV30 to go back on the other SE. Baileys are very scarce now and very expensive but there's nothing wrong with Forge or others mentioned on other threads, such as here - BOV topic
I now have an ECU with an Everest Chip, with boost to 0.9 bar, and the RDV is even more significant in keeping the turbine spinning and back on boost to power through the corner... but if you only drive straight lines on main roads it won't make much difference having one or not.
Some time I might sell the '91 SE so I've bought one of these - cheap RECIRCULATING-DUMP-BLOW-OFF-VALVE and if it works OK it can replace the DV30 which I'll keep as a spare, or sell at an extortionate price ..
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