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Jens, Great, did you beat him? What kind of Porsche? You might try and do a test before doing a new fuel pump. Try and take 6 or 8 layers of kitchen aluminum foil, crumple it a bit so you have some air space between layers and wrap either the fuel pump and/or the exhaust pipe. You might try and go one step further and take a wet red shop rag and wrap the fuel pump first then wrap in layers of foil. You can also take one or two layers of beer can cut open and wire it... MORE
The oil going into the combustion chambers will also reduce the apparent octane of the petrol which won't help matters. David "David Jacobs" 33280... MORE
"oil in combustion process...reduced octane" Most assuredly so, David. Yet another symptom we knew nothing about prior to Jen's last post. I had no idea it was blowing blue smoke. This is "wearing me out"!! :):) Cap'n. Bob '60 :{) PilotRob@... 33283... MORE
Jens....STOP!!! Your chasing yourself in circles here. The variation in cooling temps with the mixture variations, along with appearance of the plugs and most of all, detonation/ pre-ignition (with octane changes thrown in for good measure) suggest the engine is operating on the borderline of self- destruction, in short time. Saving pennies on octane is extremely penny-wise, pound foolish. With a tuned unit utilizing high rpm's a good part of the time, "economzing" on octane can shortly become extremely expensive. Your "tuned" engine is an investment. Feed it a proper and appropriate "nutritional" diet. :):) May I suggest..... ...firstly,... MORE
Jens... What color are the plugs after you pull them out after a hard run? They should be chocolate brown (insulators) with the shell tinged carbon (dry) black, assuming "correct" timing, mixture and cooling system in reasonably good shape, etc. And what compression ratio are you running, BTW? On what octane #? Cap'n. Bob '60 :{) PilotRob@... 33252... MORE
Nigel, You are too kind. Most glaring mistake was installing the throttle and choke linkages backwards. My only excuse is that I've never worked with dual carbs before. I also had to reset the float in one carb as it leaked gas out the intake. FYI-I set the mixture at 2.5 turns from flush and was pretty close to right on. The motor runs about 15-20 dgs. cooler and sounds better and is definitely more responsive. Haven't driven the car yet as I have to build a throttle cable bracket tonight or tomorrow. Then it's a road test and... MORE
Nigel, I don't remember what your car is, But FWIW... I had a similar problem with my Bugeye, My car came disassembled and the fuel tank fiting was not included. By trial and leak, I found that (USA terms) a standard tubing thread, copper compression fitting works. V.B. says that the same fits 65-74, and that the same pipe nut also fits 75-79, so I would assume that this should work in your car. I used copper tubbing from gas tank to carbs, (1 1/2" :() ), which is not stock, but is easier to bend and doesn't rust.... MORE
Hi guys I'm just getting ready to put the fuel tank back on and on inspecting the fuel feed pipe that goes into the tank itself, I noticed it was pretty corroded and on inspection (er read bending) it broke! No big deal I suspected it was corroded beyond service I just wanted it confirmed! The pipe nut on the end look to be pretty serviceable as does the nipple/flare on the end of the pipe. Question - how is that nipple/flare attached to the pipe? Is it brazed on? glued? compression fitting? Can I reuse it or do... MORE
fluid is safer than compressed air, as it is not compressible, so when the piston does pop out, the liquid doesn't expand, unlike a gas. Pressure vessels are tested for leaks this way. David "David Jacobs" 33066... MORE
Hi All. Well, we replaced the Master cylinder AND the slave cylinder, got the clutch bled and viola! ....the car ran like a well oiled top:) I had so much fun running around in it for 2 days...right up until I met with the local British Automotive club for a run...and it died on me in a parking lot. Damn! The fuel pump went out. We bought a new fuel pump today and I'll be up and running again in no time. The GOOD news, is that pretty soon I'll have replaced every part in the car and it... MORE
Yes, Robert.... Mike Moore recently stated that we have become a nation of idiots. Well...he oughta know considering his most recent movie is (proven to be) about 1% truth laced with 99% BS, though it's touted as a "documentary"? (And there are those who believe it IS!!!!) But, he's got a point. Imagine "intelligent" ("situationally aware" with respect to their own survival, let alone the survival of others around them) adults driving in traffic while holding a cellphone to their ear or otherwise dividing their time between focusing on the task at hand while holding a conversation? Nation of... MORE
It is simple, just stay on the gas and shift at red line..no problem. Cheers Bob in San Diego "Robert D. Gardner" 32950... MORE
"We are in the process of relocating.... sporadic cell service" Ah...a "serious" matter, then. I'd go with Biff Jones idea for sure. A second distributor...all set up, spare spark plugs, spare fan belt, and a length of spare hose and ignition wire, spare fuel pump, and necessary small bag of tools. The all important flashlite of course and a portable starter/charger as well if you're really out there in the sticks. Of course... what will serve you best is a quality scheduled, preventive maintenance program (and the "right attitude" towards being "situationally aware" in terms of survival in the... MORE
Yep.... You got it big guy!!!! Of course, this assumes a reasonably healthy engine pulling decent vacuum. TWO CAVEATS.... 1) If the engine's clapped out and is pullin' lousy vacuum, the pistons will never "top out", spring tension and fully open butterflies notwithstanding and thus....it follows, that.... 2) the entire induction system has got to be "air tight" as well. You don't need a midget under the hood. You need an SU carb tool kit!!! It comes with a little jet centering tool along with "rods" you place within the piston tubes which temporarily take the place of the... MORE
I just opened my SU book and it calls it the piston and the butterfly close to the head is called the throttle valve. The piston is more of a variable venture and the butterfly is more of a valve that turns on and off the air/fuel flow. FYI, Bob "Robert D. Gardner" 32714... MORE
Rich... Your fuel pressure setting is correct. There is some falling off in pressure between pump and carb. I've been using low pressure (2.5-4.0) Facets for many moons now with stock float valves...no problems. Same with previous Vizardized Series A with 90hp to rear wheels and Weber "45" except pump was Facet 6psi or so through 2.5 pressure regulator. Stock float valves in this case also. No problems. What pressure does your pump initially put out? What "color" would appear on a NEW set of spark plugs on your car after a hard run, preferably up a reasonably sloped... MORE
I am hoping someone can help me with a problem I have obtaining a key set for my 1971 Midget. I purchased a lock set consisting of the two doors and boot lock, all with matching FS keys. I am now trying to purchase either just the lock barrel or the complete ignition switch (located in the middle of the dashboard) with the same FS key number as the doors. I have spoken to most of the suppliers such as Moss, Brown & Gammons etc. but none will sell me the ignition barrel with a specific key number. I... MORE
I thought 1.5-2 psi was optimal for the SUs and anything more would be a problem (of course every car has its own quirks). I have my regulator set around 2 psi (WAG). However by my seat of the pants I have a funny feeling that during high speed extended runs it "feels" like it stumbles just a bit. I haven't tried bumping up the pressure just yet. I am thinking fuel starvation due to slightly to pressure being a bit low. When I first installed and set the regulator it was way too low and the rear carb... MORE
Don't know if this has been mentioned yet, but older grosse jets worked quite well. However, newer ones for some reason don't stand up to their reputation.I tossed three of them from my triple-carbed big Healey when I found the "two balls" were sticking and not shutting off the fuel flow. Rick HealeyRic2@... 32607... MORE
Martyn... The SU pump pressure is pre-set (though it may be adjustable...I dunno!:) and comes "fully compatible" for SU carbs. This having been said, it's possible to get a "bad" new part....a "lemon", if you will. Test it with a fuel pressure gauge. If it's putting out more than 3.5-4.0 psi, it's got a problem. Cap'n. Bob '60 :{) PilotRob@... 32601... MORE
The fuel pump is a new SU one so I would assume that it is set for SU carbs. Is the pressure adjustable or do I have to use an external regulator?. The needles hold pressure until the engine is started and the it starts overflowing. I've order some standard jets to replace the Grose ones. Martyn meastwood1@... 32599... MORE
excessive fuel pressure maybe? Tad "Richard Rivenbark" 32597... MORE
I'm installing Grose jets into my HS2s and if I set the float to the right height per the manual I get fuel dumping from the bowl vent. What is the correct height to shim the Grose jet to? I've never had a problem with the standard jets before. Martyn "Martyn Eastwood" 32558... MORE
Shane, They are supposed to just go on the inlet valve stems. These are the only ones that the pistons are descending on when the valve is open, causing them to suck oil down the guides. On the exhaust valves this, in theory dosn't happen. However on mine it was burning too much oil until I fitted oil seals on the exhaust ones as well. Possibly because of wider tollerance using unleaded fuel valve guides, or maybe because of the cam I was using. Actually I suspect oil was being drawn down the stem and then burning directly in... MORE
Thanks to all that answered. Now for the next phase. The Autometer Phantom fuel level gauge that it looks like I am going to use is rated as 240 ohms empty & 33 ohms full. Methinks that this gauge with the stock Midget sending unit will read full before its really full and empty before its really empty. Or are the resistance values close enough that it wont make a noticeable difference? They offer a matched "universal" sending unit that hopefully I don't need. Thanks again. Tad From robert batley: "0 Ohms Probably a broken lead wire. Maybe a... MORE
