Quadrajet Carby

[MKPatrolGuy]

How do I unbolt my Quadrajet from my inlet manifold. I can't see any bolts at the front holding it on, just at the back.

Also what is the easiest way to hook up the fuel return line to this carby?

Thanks,

[planb]

there should be 4 bolts on top

[V8Patrol]

There's 2 bolts at the back that are 30mm long and only go through the base plate of the carby...there easy to see...

The other 2 are at the front and go from the top of the carby .... I'll get a pic 4 ya .... be right back !




Back !!! ..... my grotty fingers are pointing to the 2 front bolts !

[MKPatrolGuy]

Thanks guys the carby will soon be off

So, what about the return line?

[V8Patrol]

eerrrr ..... what rerturn line ?????..... I asume you mean one of the 2 fuel lines that join in that funny shaped "tee" piece that was originally bolted to the front of the 6cyl motor. If thats the one you mean, tis easy... get a fuel filter and fit it to the return line ( its the smaller of the 2 lines), leave the other end open... hey presto ....... a fueltank breather !!!
Another solution is to simply setup the tee piece the way it was and forget !.... this way you have a duel fuel line.
Rochesters and Holleys dont need a returnline, they can handle the fuel pressure whereas jap carbys generally dont.

[MKPatrolGuy]

Yeah that's the one I am talkong about In my manual it actually calls it a return line. I'll whack a filter on the end of it, easy

[V8Patrol]

If it dont work... ( it does on mine but that dont mean it will on urs....being typical nissan ! ), then take to the tee piece wid da hacksaw and trim it down so that the inlets/outlet are about an inch long..... then just hook up the 2 feed lines as they were and run the single outlet to the fuelpump...works the same and ya dont have to get a filter.

If ya running electric fuel pumps as per the petrol MQ you wont need a mechanicle pump, so as in the below pic the outlet goes straight to the carby.

As for the tee its self... I bolted it to the brake booster and bent the bracket around 180 degrees to fit nicely, joined up the 2 fuel lines and ran the other to the carby.

[MKPatrolGuy]

thanks for that, another little job to do

[Webbie]

hey V8patrol OR ANYONE ELSE Why does my quady either bog down or stave for fuel under load at about 2000-2500 revs but not in nuetral any ideas , i thought it could b a vacum line someware.
BTW this motor was run in on a dyno and didnt show any of these probs.I Know because i ran it in.

[Fieldsy]

Sort of off topic but how does the Quadrajet handle 4wding eg side aingles and up's and down's. I ask because I just got a 308 that has one on it.

[MKPatrolGuy]

Sort of off topic but how does the Quadrajet handle 4wding eg side aingles and up's and down's. I ask because I just got a 308 that has one on it.

I haven't had any probs

[Rainbow Warrior]

Sort of off topic but how does the Quadrajet handle 4wding eg side aingles and up's and down's. I ask because I just got a 308 that has one on it.

IMO Quadra jet is the best non factory/aftermarket carby around for offroad usage. A mate had one in a 308 Patrol with double lockers and it never missed a beat.

[Fieldsy]

Cool looks like i auctley got luky this time at least it should do the job untill i go lpg

thanks

[V8Patrol]

hey V8patrol OR ANYONE ELSE Why does my quady either bog down or stave for fuel under load at about 2000-2500 revs but not in nuetral any ideas , i thought it could b a vacum line someware.
BTW this motor was run in on a dyno and didnt show any of these probs.I Know because i ran it in.

not enough information....

does it only do it offroad?
is it an old unit?
what have u checked?
what size motor?



Kingy

[Webbie]

MORE info got it as a reco job outta sydney speed supp ,only just go my truck going ,still has no glass or much interior so ive just been giving it a squirt up and down the road.(ILLEGAL I KNOW )
Its on a mild 308 and set up on gas but the gas is disconected ATM just got the sprint type gas hat on the carb, but is hooked up to vacum so go with that lot i suppose.