doobreydog

Active Member

• Jul 13, 2013

• #1

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???

 

Spunka

New Member

• Jul 13, 2013

• #2

you can use a fuel preasure regulator

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

 

doobreydog

Active Member

• Jul 13, 2013

• #3

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

 

jamesmartin

Well-Known Member

• Jul 13, 2013

• #4

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

 

3.5 efi

Well-Known Member

• Jul 13, 2013

• #5

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

 

doobreydog

Active Member

• Jul 14, 2013

• #6

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

 

tacr2man

Well-Known Member

• Jul 14, 2013

• #7

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 .

 

Spunka

New Member

• Jul 14, 2013

• #8

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

 

doobreydog

Active Member

• Jul 14, 2013

• #9

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