New guy, new build

[chriswillrise]

Deep sump isn't absolutely critical, but can definitely be a lifesaver. How do you intend to use the car? Street cruise with the occasional freeway pull? Or actual passes on a drag strip? Or do you intend to make to car corner at speed?

yeah street cruiser with a pull here and there. With the car being this low i knew the lower gears would be useless and the tires would just break free. Probably wont ever be banging through all 4 gears WOT. And no cornering the car at speed, it doesnt handle too well

[Chip Birks]

You're probably fine

[chriswillrise]

hopefully, I have a big vacuum leak somewhere preventing me from starting the car so im going to be taking some stuff apart tomorrow to try and find it. the car will only start if I put a rag and my hand over the carb

[madmike]

I'm with Risk on the this,, your putting a lot of torque/power on the stuff made for 40hp

[chriswillrise]

well i checked everything and canot find a vacuum leak but the car will only start with your hand over the carb

[Piledriver]

Idle fuel jets turned out to recommended setting? Try some more?
Butterflies proper base idle position set?

[chriswillrise]

Idle fuel jets turned out to recommended setting? Try some more?
Butterflies proper base idle position set?

it is aj sims fucking carb. i cleaned it and checked everything 3 times. Pu my budys turbo prepped sidedraft and the car started right up

[sideshow]

Its a Holley carb with an aftermarket jet plate. I don't know anything specific about the plate but the carb itself is of sound design and unlike Weber still cares about its users.

All anyone needs is compressed air and carb cleaner to troubleshoot a no fuel problem.

Is the float chamber filled with enough fuel?
Do the accel pumps work?
Idle passages clear?

[turbobaja]

Does the Low Budget carb use a choke of any kind? Maybe you just need to give it a few pumps before cranking, assuming the accelerator pump is squirting fuel properly. I've heard mostly good, successful stories about AJ's draw-thru carbs. They seem to work OK for people aiming for the KISS method, not trying to achieve ultimate drivability or max power. Mostly going for the look/sound of the turbo package to add to the shock value of their dumped patina Dub.

[Clonebug]

Does the Low Budget carb use a choke of any kind? Maybe you just need to give it a few pumps before cranking, assuming the accelerator pump is squirting fuel properly. I've heard mostly good, successful stories about AJ's draw-thru carbs. They seem to work OK for people aiming for the KISS method, not trying to achieve ultimate drivability or max power. Mostly going for the look/sound of the turbo package to add to the shock value of their dumped patina Dub.

Hey Karl!!!!

Long time no see!!!!!

All is well?????? You need to update your build page........

As for the carb... give it a little shot of fuel down the carb throat and if it starts you know it needs more fuel for startup.
Most of the draw thru setups need a good dash of fuel to get down to the engine for cold start.
The turbo compressor can be a fuel well if it has a low spot lower than the outlet.

[chriswillrise]

Its a Holley carb with an aftermarket jet plate. I don't know anything specific about the plate but the carb itself is of sound design and unlike Weber still cares about its users.

All anyone needs is compressed air and carb cleaner to troubleshoot a no fuel problem.

Is the float chamber filled with enough fuel?
Do the accel pumps work?
Idle passages clear?

yes it is the one with the adjust a jet plate, ive taken it apart and cleaned it 3 separate times with no luck. The float is set perfect if I take out the bowl plug and tap the carb a little fuel comes out.

no passages are blocked, accelorator pump works, gaskets are all goodit will only start if i cover the carb with my hand or spray carb cleaner down the throat

[chriswillrise]

ok i think i may have found the problem this is a picture of the percy adjust a jet block.

The holes im pointing too line up with the holley metering block where the main jets would go. They are completely sealed so not letting fuel in from the bowl

If anyone has a adjust a jet laying around and could take a picture for me id really appreciate it

[sideshow]

Again I am not a holley person, but back trace that circuit.

One side should be low and fed unrestricted from the float bowl area.
Then (I'm guessing) goes through an adjustment passage/calibrated restriction, then exits higher in what I think is the annular booster. Or whatever is higher in the carb body and discharges into the venturi's choke point (narrow spot above the throttle plate).

But that will be the high speed circuit, you don't really need it to start and idle.

[chriswillrise]

Again I am not a holley person, but back trace that circuit.

One side should be low and fed unrestricted from the float bowl area.
Then (I'm guessing) goes through an adjustment passage/calibrated restriction, then exits higher in what I think is the annular booster. Or whatever is higher in the carb body and discharges into the venturi's choke point (narrow spot above the throttle plate).

But that will be the high speed circuit, you don't really need it to start and idle.

all the fuel has to pass through the main jets to get to the idle circuit. You kinda have to be starting at a holley metering block to understand the circuits. ive traced them all and the idle circuit is supplied through the main jets


and what im thinking is the problem is a manufacturer defect and if this is true then the fuel CANNOT make it into the carb to run through the idle or main circuits. the only thing that works on this carb is the accelerator pump which runs through a completely different circuit

[Piledriver]

I think you are correct and need to hit up lowbugdet for a replacement part.
Courtesy of a pic from Amazon via the GIMP:
Looks like they forgot to drill the holes on yours...
If they are not metering holes and merely passages use the gasket to mark for drilling the holes.

percy-adjust-a-jet-plate.jpg