1102 replies to this topic

[Obey 1]

Good on you for having a go Mat, but I would be definitely looking at another carb.
Who knows what other bits of crud etc you aren't going to find ,which could block up another passage or make your needle and seat stick !!
Which isn't a pleasant experience when you are driving along. Happened to me once ,wasn't sure what was going on but the car was running horribly ,spluttering and carrying on , when I finally pulled over and opened the bonnet I had an extremely hot manifold filled with puddles of boiling fuel !! Scary to say the least.
It is good though to pull one apart, makes troubleshooting a lot easier if something else goes wrong.

Edited by Obey 1, 24 June 2017 - 04:38 PM.

[Shiney005]

It's not a bad option. More reliable than the Holley too.

[gtrboyy]

Hmm main consideration for me is will you end up buying 308 bottom end down the track..if so I'd be wanting 4bbl.

 

Vh 253 had hi-po version that was hei dissy,twin into single exhaust with aluminum 4bbl manifold/quaddie..all good gear that can be put onto 5 litre block.

 

Also think you'd probably get away with holley for rego these days as long as car is neat & presentable + pollution crap "looks" like it's hooked up

 

Tightarse/D.I.Y part of me says have a crack at that holley you already got...cant make it any worse.

[Bigfella237]

You're also looking at a different air cleaner for the stock carby.

[gtrboyy]

Quaddies are good,sold the reco'd one I had dirt cheap $200-$300 but also sold off spare ones to pay for it all...temporarily had vh blue 253/trimatic & hz 308 in the Gtr with extractors/hei/3.9 lsd

 

Quaddie was very nice carb had reco'd by purplelc(?) from here but the engines were too standard & slow for what I was used to lol.

 

Keep trying on that holley or try another Wanted To buy ad see what pops up.

[gtrboyy]

From factory 4bbl/hei/twin pipes was the power upgrade....although it's not a massive improvement unless upgrading engine internals imho.

 

Basically if staying holley just use your adaptor & 2bbl manifold.

 

If going the quaddie use 4bbl manifold as it bolts straight on...holley carb will need different adaptor unless carb has the correct base.

 

For reference the 2 metal pipes bolt to side of the quaddie,

                             vacuum tree is extra lines for pollution shite.....it unscrews,you can either change to your fitting or other holden versions.

                             accelerator bracket is commodore,cable comes from front

                            

                            The rest of the stuff is pollution crap but easy enough to hook up.

 

Them 2nd hand holleys are dirt cheap on ebay too.

 

How hard is it to get a car registered down there?  Decided on carb yet? lol

 

Most seem to be a little lenient up here just to see a neat old jalopy back on the road & it helps most can't remember what their actually meant to have from factory.

[Shiney005]

Matt, don't forget that the answers you are getting from the absolute gentlemen who have been putting their time into this, will be helping others in years to come. Because you ask the "stupid" questions, this thread will be invaluable to many other people who are willing to have a go.

[EunUCh]

#7 is just a full vac take off to run other stuff that was hooked up to pollution control stuff ?

 

#8 is what they call "fast idle" screw and is adjusted to get the idle ok when the choke is on , this screw touches on the 'steps" of the 

odd looking camy thing that it lines up with.

It is only used to get cold idle right while choke is "on" , after the choke comes off it does nothing but take up space.

 

#10 is a bowl vent and goes to canister

 

# 12 is "normal idle" adjustment , used to set "curb idle" or just plain idle once engine is at operating temp.

 

# 11 which is #14 in the other picture is idle mixture adjustment , 2 of them because it is a 2 barrel and each one is set to get

best idle.

 

#13 is accelerator pump.

 

The fuel line from fuel pump goes into the bowel on the choke thermostat side and has a special brass fitting that is the seat for the needle as well as being able to screw a flare nut with a piece of flared steel tube into it from the out side , the original fuel line from pump to carb was all steel tube , these days most people just use rubber line and use a short piece of steel tube onto the carb as can be seen in the picture showing the lectric solenoid thing.

 

Your manifold looks like the EGR port is plated does it not ? , if not then plate it and do not use EGR , EGR was obviously a problem

which is why they probably blanked it off to bypass making more pollution.

 

They are not a bad little carb , bit harder to play with than a 350 but look "factory" and work ok on a stock 253.

 

Yeah , it's hard to make a choice  at times and satisfy the rest of the rules & regs , surely someone has a serviceable WW that could be tried out ?

 

 

 

 

 

 

[gtrboyy]

Be good if you can borrow a WW or even another holley to try out & get it running.

 

Don't mind the question as you're out there having a go doing it yourself & most importantly learning