Which fuel pump...

Finally killed my 3.5 v8 auto hybrid on efi flapper (last heard rattling its tits off down M62 heads/gaskets fooked compression readings worse than my school report)

Got a 3.5 on carbs for a couple of quid off mate .... seemsnicely set up and all good


Current (knackered) set up is on LPG through Blos carb used as a toy for greenlaning only petrol only used for starting and emergency when I cant find gas....

Hate electrics and quite happy to stick with carbs but just wondering....


Current efi will have a high pressure fuel pump.... I know if you swap from carbs to efi then you need to replace Low with High but if I go other way will I need to put LP pump in or will HP do for its very limited use??????


Any other probs I might run into???

you can use a fuel preasure regulator

I presume efi has a fuel return line so get a regulator with a return

Spunka said:

you can use a fuel preasure regulator

I presume efi has a fuel return line so get a regulator with a return

Click to expand...

Cheers fella....worth a coat of thinking about.....efi got return

doobreydog said:

Cheers fella....worth a coat of thinking about.....efi got return

Click to expand...

you want low pressure pump ,34 psi is too much for carb

will spew petrol out of every orifice with high pressure pump.

Cheers fellas.... Now just trying to identfy carbs.... Look like SU to me but long time since I had anything with carbs on.... got a tag on with following

FZX 2005L

6 WK706

can do piccys later

just disconnect power to intank pump and mount a low pressure facet pump in line you will still need return line with carb set up as the V8 has a flow and return system , to help prevent vapourizing You should be able to swap your electronic dizzy into the new motor .

tacr2man said:

just disconnect power to intank pump and mount a low pressure facet pump in line you will still need return line with carb set up as the V8 has a flow and return system , to help prevent vapourizing You should be able to swap your electronic dizzy into the new motor .

Click to expand...

yes as above, a facet pump will be cheeper than a regulator man enough to rejuce that kinda preasure down , you would have to have pipe unions and braided pipe to be safe

Cheers all.... just going for a crawl round underneath now.... when I gt it it had best part of 4 full wiring looms left in place so you never know maybe a LP pump still in place