16 replies to this topic

[Holdenbn74]

Hi team, being doing research as putting in a 304 and this site has helped immensely 😁
One thing I couldn't find info on is charcoal connections .
I have used old fuel line for return line to tank and ran a new line for supply.
As the charcoal cannister should have the vent line to tank what did everyone do with theirs?
Should I run another line to hook it up properly?

Appreciate info 👍☺️

[Shiney005]

Over east you would have to run another line back to the tank to satisfy yearly checks, or EPA tests. But over here, if it is still licenced (as a V8) you could probably get away with a short hose tucked away out of sight to vent it to the atmosphere.

[yel327]

What sort of 304 are you talking about? A VK-VL one with a carby or a VN-VS injected engine?

 

For the Carbied 304 (Quadrajet) just use an ADR27A (3 port canister) off an LX-UC or HX-WB etc using the LX brackets. Block off the port that is blocked off on a 308 and one port goes to the tank breather/condenser setup and the other to the carb's canister port.

 

For an EFI 304 (or HSV 350 stroked engine) use the canister off the donor car including the plastic lines and rubber joiners that go to the throttle body, with the line to the tank going to the port that does the same job on the donor VN-VS. On these cars the little canister is mounted to the car using a little spring clip, grab that whole setup and attach it to the side of the radiator or off the radiator support.

 

If your LH is a 1974 compliance you'll need to change the fuel tank and associated vapour recovery stuff over from a 1975 LH or LX. If it is a 1975 compliance it will already be there. The fuel cap will need to be sealed as well. 

Edited by yel327, 09 April 2015 - 02:28 PM.

[Holdenbn74]

Cool it's a vs injected motor. It's a 75 LH so has pollution.
Will grab one from a wreck.
👍
Thank you.

[yel327]

lh 75 didn't have to have pollution, as it isn't on the adr plate, nsw can almost get away with no pollution gear, not sure about wa though

 

All GMH cars complianced from 1/75 (and HJ utes, vans and cab-chassis) had a sealed fuel tank, sealed carby fuel bowl (or at least scavenged by the canister) and canister. It is illegal not to have it. All GMH passenger vehicles from sometime in 1973 onwards until ADR7A was applied had ADR27 on the compliance plate, which is the PCV valve and associated gear on the engine. The only GMH "cars" without ADR27 on the compliance plate were utes, vans and tonners up until the end of HJ unless they were trial ADR27A fitted or one of the odd later HQ commercials that had ADR27 on the compliance plate.

 

Furthermore if you are fitting an injected engine into a 1975 vehicle in NSW you have to fit AL the emissions gear from the VN-VS that the engine came from, the only "out" on these is to use an earlier block.

Edited by yel327, 09 April 2015 - 07:12 PM.

[UCgazman]

Furthermore if you are fitting an injected engine into a 1975 vehicle in NSW you have to fit AL the emissions gear from the VN-VS that the engine came from, the only "out" on these is to use an earlier block.

 

Pretty sure its the same here now...

 

Oh and you can fit the carbon canister under the guard so you don't have to look at it -

[Bigfella237]

Hmm... forgive me if I'm mistaken, but doesn't the charcoal canister need to be higher than the level of the tank so it doesn't fill up with raw fuel?

[Holdenbn74]

Good info figured I would have to use everything from donor car. I will hook up to throttle body I stead of running another line back to tank breather.

[UCgazman]

Hmm... forgive me if I'm mistaken, but doesn't the charcoal canister need to be higher than the level of the tank so it doesn't fill up with raw fuel?

 

Nope, the line runs from the top of the tank and also sits higher than the tank in the engine bay (along chassis rail) before it drops down to the canister. MAYBE if you filled the tank to the brim and jacked the back up really high it would, but I'm not wastin petrol to find out...

[yel327]

Good info figured I would have to use everything from donor car. I will hook up to throttle body I stead of running another line back to tank breather.

 

You have to hook it up to the throttle body AND to the fuel tank evaporator setup. The canister does both jobs (throttle body and tank fuel vapour condensation).

[TerrA LX]

Hmm... forgive me if I'm mistaken, but doesn't the charcoal canister need to be higher than the level of the tank so it doesn't fill up with raw fuel?

Can anyone confirm this, I was also under the impression the canister had to be mounted at least as high as the top of the tank to help prevent auto siphoning like in the event of an over filled tank on a steep driveway.

[Holdenbn74]

I think the main thing is what do the guys that run these 304's have currently? Hooked to tank as per original and position of canister as I've seen heaps moved down under the guard but haven't heard any news from that like above.
Cheers

[UCgazman]

^^Ditto, was told by heaps of people to put it under there and haven't had any drama's with it once I did.

 

Also, not sure if this is UC only, but I remember when I had the tank out there was some sort of plastic insert in that breather pipe that goes to the charcoal canister. Possibly some sort of one way valve or something   I didn't want to break it so I just left it alone.

[yel327]

so my 76 hj, it had a canister on it but i took it off as the 75 hj didnt have it and there were no difference in adr rules on the plates, the only polution gear left is the pcv valve, so effectively mine shouldnt be on the road?

 

As I said all Holden and Torana from 1/75 have a canister, BUT there is no ADR for a canister on the compliance plate- it was just added. There is additional pollution equipment to the canister associated with it which is:

 

Sealed carby fuel bowl for Quadrajet or vented to the canister for Strombergs.

Sealed fuel tank, vapour devices at the fuel tank and vapour line.

 

ADR27 which you find on HQ from 1973-ish is the PVC valve, PCV breather into the air cleaner, sealed crankcase and the carbs had a different spec as well as the numbers updated at the same time. You find from the time canisters became mandatory (1/75) there were no longer auto and manual carbies as all carbies now needed ported vacuum to purge the canister - prior to that time auto carbs didn't have a ported vacuum port.

You won't find ADR27 on HJ commercials at all, but they did have the canister and associated equipment.

 

Correct, by the letter of the law if you have a 1975 or 1976 pre ADR27A HJ or LH-LX vehicle without the sealed fuel tank, vapour line and canister with appropriate carby you could be defected by the RTA or EPA. rarely happens like most stuff. If you presented the same car to an Engineer for say fitment of a 350 SBC without the canister and associated equipment it wouldn't pass. 

[hanra]

This is how I set mine up. Obviously not an injected 304 however... May be a good reference for someone however?