Iain T Posted March 4, 2022 Report Share Posted March 4, 2022 Another must have to calm my fears. Its a Sealey kit but as you can see the gauge needle is way off zero! The supplier is sending another for delivery tomorrow, they don't want this kit returned. Just another example of poor quality equipment. To be honest I plugged it in without noticing the problem and wondered why the pressure from the Huco electric pump was reading 0.5psi. It may be the pressure is low but I can't trust this kit! Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 4, 2022 Report Share Posted March 4, 2022 as the dont want it back can you get at the needle to reset the zero ?? if the replacement is better you can compare the readings to get some faith in what is calibration is like I have a similar looking but Gunsons brand and there is no external zero adjustment which would make it easier Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted March 4, 2022 Report Share Posted March 4, 2022 Maybe that's atmospheric pressure? I'll get me coat.... Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 4, 2022 Report Share Posted March 4, 2022 if it is were in a Vacuum , does that go with depression which seems the latest Oh dear problem Pete Link to comment Share on other sites More sharing options...
Iain T Posted March 4, 2022 Author Report Share Posted March 4, 2022 1 hour ago, Pete Lewis said: the dont want it back can you get at the needle to reset the zero ?? if the replacement is better you can compare the readings to get some faith in what is calibration is like Good idea I like twidlin an fiddlin. 1 hour ago, Colin Lindsay said: Maybe that's atmospheric pressure? I'm feeling under pressure, mainly due to trying to get the top rear corner of the flippin driver's door glass to move 10mm inboard! Spacers in the glass channel just ain't moving it🤬 48 minutes ago, Pete Lewis said: does that go with depression which seems the latest Oh dear problem Pete Yes my wife calls me Marvin (the paranoid Android) To top it all were barely able to get in the front door today. Found out the builders had installed a too short door handle split centre bar and the grub screw had unclamped! Ordered one 20mm longer, idiots had used an internal door bar when the front door is much thicker. I give in....... Iain Link to comment Share on other sites More sharing options...
Wagger Posted March 4, 2022 Report Share Posted March 4, 2022 I received that kit last week. The needle is on zero. It agrees with two other gauges at 4psi. Good enough for me right now. The vacuum side will be good for manifold checks, I hope. As others have suggested, just set the needle yourself and check it with the next one. 1 Link to comment Share on other sites More sharing options...
johny Posted March 4, 2022 Report Share Posted March 4, 2022 This has set me to wondering about the reliability of using one gauge to measure positive and negative pressures... Link to comment Share on other sites More sharing options...
Iain T Posted March 4, 2022 Author Report Share Posted March 4, 2022 Haven't used it to measure the inlet vacuum. Are there any specs or charts available? Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 4, 2022 Report Share Posted March 4, 2022 in general idle 18-21inhg full throttle zero cruise 25 decelerating 28 -32 ins hg Pete Link to comment Share on other sites More sharing options...
NonMember Posted March 4, 2022 Report Share Posted March 4, 2022 8 minutes ago, Pete Lewis said: decelerating 28 -32 ins hg That's rather extreme deceleration, when you consider that atmospheric pressure is 29.9"Hg, so half that range is more vacuum than outer space! Link to comment Share on other sites More sharing options...
Iain T Posted March 5, 2022 Author Report Share Posted March 5, 2022 That's better, I bought from Folkestone Fixings excellent service. Now to do some fiddlin Link to comment Share on other sites More sharing options...
Iain T Posted March 5, 2022 Author Report Share Posted March 5, 2022 22 hours ago, Pete Lewis said: the dont want it back can you get at the needle to reset the zero ?? Yes! Took the casing off and rotated the copper half tube and zero'd the needle. Compared results with the replacement and they are the same. Result....but I don't need two kits! Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 5, 2022 Report Share Posted March 5, 2022 you cant have too many so rig it up and give us the readings you often need a squeezed up pipe to damp induction vibrations shaking the needle so you cant see it Pete Link to comment Share on other sites More sharing options...
Iain T Posted March 5, 2022 Author Report Share Posted March 5, 2022 The fuel pressure is fine at 2psi, I'm waiting until it gets a bit warmer to check the vacuum🥶 Link to comment Share on other sites More sharing options...
Iain T Posted March 6, 2022 Author Report Share Posted March 6, 2022 Time to try the vacuum test and which hose to use, I'm thinking the snake like curly hose from the manifold to the pcv? I think one of the adaptors that came with the kit might push on at the manifold but failing that on the hose at the pcv end. Another option might be the dizzy vacuum hose connector on the carb? I want the engine to run evenly at idle to get a steady reading. Iain Link to comment Share on other sites More sharing options...
NonMember Posted March 6, 2022 Report Share Posted March 6, 2022 The carb/dizzy advance pipe doesn't really tell you manifold pressure - it's too close to the throttle plate. If you have a servo tapping, that would be a good place to use, otherwise the S-shaped PCV hose would work. Link to comment Share on other sites More sharing options...
Iain T Posted March 6, 2022 Author Report Share Posted March 6, 2022 3 minutes ago, NonMember said: otherwise the S-shaped PCV hose would work. Thanks, is it better to try and use a Tee or is it OK to leave the pcv outlet open to atmosphere? I don't have a servo tapping. Link to comment Share on other sites More sharing options...
daverclasper Posted March 6, 2022 Report Share Posted March 6, 2022 51 minutes ago, Iain T said: Thanks, is it better to try and use a Tee or is it OK to leave the pcv outlet open to atmosphere? I don't have a servo tapping. Was wondering that myself?. Link to comment Share on other sites More sharing options...
NonMember Posted March 6, 2022 Report Share Posted March 6, 2022 No problem leaving the PCV open to atmosphere. Without any manifold vacuum it will remain fully open and give a clear breather to the rocker cover. Link to comment Share on other sites More sharing options...
Iain T Posted March 6, 2022 Author Report Share Posted March 6, 2022 10 minutes ago, NonMember said: No problem leaving the PCV open to atmospher Great, I thought it would be OK as my TR3A just vented the crank to atmosphere. I'll try it out tomorrow. Thanks for your help Iain Link to comment Share on other sites More sharing options...
Wagger Posted March 7, 2022 Report Share Posted March 7, 2022 On 05/03/2022 at 12:45, Iain T said: Yes! Took the casing off and rotated the copper half tube and zero'd the needle. Compared results with the replacement and they are the same. Result....but I don't need two kits! Iain If you go to 'Meets' or put it in the Courier at a modest price, a fellow member may make you an offer. Link to comment Share on other sites More sharing options...
Iain T Posted March 7, 2022 Author Report Share Posted March 7, 2022 Just now, Wagger said: you go to 'Meets' or put it in the Courier at a modest price, a fellow member may make you an offer. I've given it to my friend who has helped me with bits on the Vitesse. He has a crazy Daimler special, an mgc and is currently building a Sebring mgb v8. One good turn deserves another. Link to comment Share on other sites More sharing options...
Wagger Posted March 7, 2022 Report Share Posted March 7, 2022 1 minute ago, Iain T said: I've given it to my friend who has helped me with bits on the Vitesse. He has a crazy Daimler special, an mgc and is currently building a Sebring mgb v8. One good turn deserves another. Good favour. I borrow and lend the 'Odd' spanner with the other three petrol heads in my close. Our skills overlap. brilliant set up. Moved into it last April and cannot believe my luck. The 'In between' neighbours are friendly too, but see us as total 'Nutters'. Link to comment Share on other sites More sharing options...
Iain T Posted March 7, 2022 Author Report Share Posted March 7, 2022 So todays fiddlin. I warmed up the engine and hooked up the gauge on the manifold vacuum hose (pcv end). It showed a low vacuum at 15-16 which on the gauge says late timing. I fitted a strobe and according to the indicators timing is 13 degrees. I advanced the timing and the revs increased until the gauge read 22. However the timing was probably 25 degrees....on the indicator! The engine is fully reconditioned with gas flowed head and only done 5-600 miles. I'm wondering if the timing marks are if fact correct? I've heard stories about the pulley moving. Camshaft out a cog? Any other suggestions? Check the tappet clearances? Iain Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 7, 2022 Report Share Posted March 7, 2022 a timing chain does get longer as the links and pivots wear , yes tooth timing is adjustable to 1/4 of th tooth but you time the dizzy so they can all be miles out but thespark can be set to the marks and show as correct its all in the life of wear and tear but at a few hundred miles most unlikely to be the problem a check of tappets is always worthwhile tight clearacnes affect the idle speed yes the outer damper ring on the crank pulley can degrade the rubber bond breaks down and the timming ring rotates about the main pulley the only way to check that is really make a piston stop from an old and extended spark plug , fit it to no1 turn crank carefully in both directions to meet the stop mark the damper ring at each point TDC is half way between the two marks ...does it tie up with the ring marks ??? 22hg is a bit too high i would drop it nearer 18 at 22 i would expect over advanced and pinking to occur . lots of oter things can affect manifold depression even the air filters on the vitesse you should not have temperature compensators which can reduce the vac if they are open keep the idle as slow as 600 at 800 you will get too high readings just some waffling Pete Link to comment Share on other sites More sharing options...
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