Wedge conversion to quad su carbs
Discussion
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Ok, id like to pick someones brain on my issue, ive changed the efi system to quad su carbs but i cant seem to get a spark, i have a new coil pack and before the change i had a spark, any ideas as ive gone brain dead, the distributor resistor has the 3 wires going to it but the one from the efi resistor has naturally been taken off, also to keep the high pressure pump ive installed a fuel pressure regulator FPR014 injection to carburettor but this seems to build up pressure in the system before it pulses and releases fuel into the bypass, any ideas on this one
If you take the king lead off at the coil and put a grounded screwdriver into the top of the coil do you get a spark there?
If you do then check the king lead, the rotor arm, under the dizzy cap etc.
If you don't then re-check the coil primary circuit, do you get battery voltage with the ignition on?
If you do then check the king lead, the rotor arm, under the dizzy cap etc.
If you don't then re-check the coil primary circuit, do you get battery voltage with the ignition on?
adam quantrill said:
If you take the king lead off at the coil and put a grounded screwdriver into the top of the coil do you get a spark there?
If you do then check the king lead, the rotor arm, under the dizzy cap etc.
If you don't then re-check the coil primary circuit, do you get battery voltage with the ignition on?
Battery voltage meter not working, got power going to coil when ignition on via multimeter but no earth If you do then check the king lead, the rotor arm, under the dizzy cap etc.
If you don't then re-check the coil primary circuit, do you get battery voltage with the ignition on?
Be interesting to see just how hard it is to set up once you've got it running.
I've got a Boxer Engineering Quad carb setup sat in the garage & never fitted because i'm daunted at the thought of trying to get 4 su's balanced and set up!
They are supposed to be pretty good for power though, it looks like a long tunnel ram kinda design so i'm inclined to believe it.
As for the spark, check the centre electrode hasn't dropped out of the dizzy cap then Check the spark at each stage, i.e top of coil, then tother end of the king lead, centre electrode, etc
I've got a Boxer Engineering Quad carb setup sat in the garage & never fitted because i'm daunted at the thought of trying to get 4 su's balanced and set up!
They are supposed to be pretty good for power though, it looks like a long tunnel ram kinda design so i'm inclined to believe it.
As for the spark, check the centre electrode hasn't dropped out of the dizzy cap then Check the spark at each stage, i.e top of coil, then tother end of the king lead, centre electrode, etc
Edited by SuperApeInGoodShape on Tuesday 3rd July 19:20
As Adam Q says, it is just a matter of being logical in the fault finding.
As John says, this appears to be a backward step. The EFI system is not perfect, but it is simple and easy to fault find and should be fundamentally reliable. However, each to his own, and if you can set up those four carbs well then it should be great. Good luck.
As John says, this appears to be a backward step. The EFI system is not perfect, but it is simple and easy to fault find and should be fundamentally reliable. However, each to his own, and if you can set up those four carbs well then it should be great. Good luck.
Yeah I used (twin) SU's for many years (Rover V8's mostly) and they work against atmospheric pressure. Keeping those oil chambers topped up is a job in itself....
Got any further with the spark? If you have a multimeter check the king lead resistance should be around 3000 to 4500 ohms.
Got any further with the spark? If you have a multimeter check the king lead resistance should be around 3000 to 4500 ohms.
SuperApeInGoodShape said:
Be interesting to see just how hard it is to set up once you've got it running.
I've got a Boxer Engineering Quad carb setup sat in the garage & never fitted because i'm daunted at the thought of trying to get 4 su's balanced and set up!
They are supposed to be pretty good for power though, it looks like a long tunnel ram kinda design so i'm inclined to believe it.
As for the spark, check the centre electrode hasn't dropped out of the dizzy cap then Check the spark at each stage, i.e top of coil, then tother end of the king lead, centre electrode, etc
Got spark ‘yay’ but now got fuel blockage in dam carb so now dismantlingI've got a Boxer Engineering Quad carb setup sat in the garage & never fitted because i'm daunted at the thought of trying to get 4 su's balanced and set up!
They are supposed to be pretty good for power though, it looks like a long tunnel ram kinda design so i'm inclined to believe it.
As for the spark, check the centre electrode hasn't dropped out of the dizzy cap then Check the spark at each stage, i.e top of coil, then tother end of the king lead, centre electrode, etc
Edited by SuperApeInGoodShape on Tuesday 3rd July 19:20
( im so looking forward to setting carbs up also I have a retired V8 specialist who’s dying to set them up for me, Then the supercharging will begin in winter BIG DUNC said:
As Adam Q says, it is just a matter of being logical in the fault finding.
As John says, this appears to be a backward step. The EFI system is not perfect, but it is simple and easy to fault find and should be fundamentally reliable. However, each to his own, and if you can set up those four carbs well then it should be great. Good luck.
Cheers I’m going to have fun I know but love a challenge lol As John says, this appears to be a backward step. The EFI system is not perfect, but it is simple and easy to fault find and should be fundamentally reliable. However, each to his own, and if you can set up those four carbs well then it should be great. Good luck.
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