well were do i start. I was using the oringinal carby but it didnt seem to be up to the job even after i bought a carter black elecy fuel pump. i then made a carby hat for my webber got it all running took it for a drive and this is what happend 1st gear rev out to about 6500-7000 rpm reasonalby smooth 2nd gear revs to about 4000 rpm dies for a couple o seconds then revs to about 5500-6000 rpm 3rd is about the same. 4th at about 140kms (cant remember tach reading) starting to surge abit put the foot down a little further and it start jerking. got home put it in the shed and checked the spark plugs even burn in all cylinders the colour of the plugs where whitish with a slight blacky brown tinge. carby is the same or simular to what the falcons had that came off a 200b unknowen jets sizes, carter black elecy fuel pump (8psi) engine is stock with no vacuum advanced hooked up boost guage reads about 3-4 psi but i have a feeling that it frigged

cheers
Harley

sounds like fuel suppy to me. Maybe put a fuel pressure guage in it just before the carby and go for a spin. What type of fuel filter are you using?

PSI isnt volume remember

it was also doing someting simular to this with the mechancle pump but a whole lot worse . im running 1/4 inch fuel line. fuel filter is a ryco 1 i think . the pump volume is 100 an sumthing gallons per hour

Do you have a rising rate fuel reg? You are runing blowthrough aye?

no fuel reg yes it is a blowthru

that might be the start of your problem

am i going to need a bigger fuel pump than ive got for the reg and do you run another line for the return. also whats the difference between the efi regs ones and the carby regs ones

carter black should be fine it meant to be able to go from 4psi to 16psi. and yes you will need to run a return line. with the regs all i know is that there is a difference how the internals work but not sure what it is. you will need a carby one

the pump iv got is a 6-8psi with 100gph is this still going to be enough flow and pressure

if its a black it will be 4-16psi.....but even if your right that would mean you can only run 4 psi boost before it runs out of pressure