Quadrajet for 253

[ari666]

i let you know which i prefer once i get my first EFI build running

 

[Aussie V8]

I get in the race car...

turn on the power arm the battery
turn on both the fuel pumps
turn on the fan switches
turn on the ignition
power up the instruments (by turning the key a tad)
set power to the starter motor via a big red missile switch


and push the button

Only to realise you left all those switches on overnight and you have flattened the battery :doh:

 

[vkberlina]

Sorry OP for thread hijacking but...

I like the power wire retaining clips they look very similar to power steering line retaining clips Looks good

 

[Aussie V8]

Sorry OP for thread hijacking but...

I like the power wire retaining clips they look very similar to power steering line retaining clips Looks good

And LPG high pressure line retaining clips.

 

[Smitty]

Only to realise you left all those switches on overnight and you have flattened the battery :doh:

nup...
one quick ½ turn of the BIG RED KEY thingy went you get out
and the whole thing is dead...electrically

 

[VR38]

Yes, it is vacuum operated, but the spring applies pressure to the secondary air flap (not the secondary throttle plate) and allows you to tune out the dreaded "bog" common to 253s running any carb rated too large for them. The secondary throttle plate will still open when called upon, but the amount of air available to it will be restricted....not starved as such.

Have a real hard think about what you have just said... they are VACUUM operated and as such will only open as far as engine demands.
restricting the VACUUM operated secondaries can only starve the engine.

 

[VR38]

why would it be? primary and secondary metering are completely seperate from each other. locking that flap means the secondary rods dont lift, thus no extra fuel, no extra air. youre basically running a 230CFM twin barrel.

granted, its not gonna deliver extreme power, but if over carburation becomes a problem, its the easiest fix.

Again, as my last reply, they are vacuum operated and will only open as far as engine demands... blah blah blah.

 

[the_boozer]

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

 

[Darren_L]

itll be fine to get around with. just tighten up the secondary butterfly spring real tight so it rarely opens.

by doing so you'll experience the infamous 'Quadrabog'

 

[ari666]

nah quite the opposite. the bog is from the secondarys opening too early, and trying to meter fuel when there isnt enough venturie vacuum. if they never open, its problem solved, he just wont have anywhere near as much power