304 efi t700

[Dr Terry]

What you can also do instead of an Anderson Plug, is to put an insulated bolt somewhere in the engine bay and run it to your starter motor's battery supply. (Some BMW's have this and it is hidden with a black cover over it.)

VE/VF Commodores have the same set-up, except they have a red plastic cover over the +ve lug.

If you're going to relocate the battery, just bring a main cable from the battery up to meet the existing VR battery cable & mount your booster lug at that point.

To keep it both simple & reliable use as much from the factory Commodore wiring as you can.

Dr Terry

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Don't you remove the charcoal canister with the EFI setup? Thought it would be a closed system with a return line running to the tank.

Not correct. The carbon canister is to collect fuel vapours from the fuel tank in hot weather.

All cars in Australia from 1975 to current have a canister, or a similar set-up to collect those vapours for emission purposes.

When converting to EFI, the tank venting & canister etc. is no different.

Dr Terry

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also I've heard conflicting stories regarding the cross member. Any truth that the standard Holden T350/400 one will work for the T700?

The TH350 cross-member is very different to the TH400 item.

The TH350 is the only one to use. It just needs to be mounted slightly further back to allow for the fact that the 4L60E auto trans is a bit longer than the TH350, but the height is spot on.

Dr Terry

[Dr Terry]

Scored a VS SS Delco ECU with Memcal for $40 and a complete EFI auto wiring loom for $50 so i seem to have a mostly complete drive train.

Be careful of the compatibility of the Mem-cal to the 4L60E transmission.

The VR & VS V8 auto computers are the same, but the mem-cal is different depending on the trans you have.

The transmissions are identified by the serial number. This appears in 2 places. One is a sticker on the bell-housing, & the other is a stamping on the main case near the pan gasket.

The important number is the first digit. If your trans is a VR then this will be either a 4 or 5 (relating to the 1994 or 1995 model year).

The function of the 4 is different to the 5 (& the 6 ) & so on.

Post your serial number & I can help with the mem-cal.

Dr Terry

[damienengland]

Thanks Dr Terry, great advice and happy to hear about the TH350 cross member, looks like i can scratch a line off my running spreadsheet. I grabbed a pic of the 4L60E transmission serial number tonight (took a fair bit of brake cleaner to cut through the muck) and it seems to be a 4 at the front of the number. Would love to hear more about the Mem-cal options. Cheers

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[playwme]

Not correct. The carbon canister is to collect fuel vapours from the fuel tank in hot weather.

All cars in Australia from 1975 to current have a canister, or a similar set-up to collect those vapours for emission purposes.

wen convert to EFI, the tank venting & canister etc. is no different.

Dr Terry

Good to know. I was having trouble visualising a late model engine bay and where the canister might be.

Wouldn't it make more sense to have the canister at the back, somewhere near the fuel tank? I assume the tank is where most of the vapours come from?

Personally, I like to be able to access my battery easily. Probably mostly cause I'm always pulling the buggers out to charge or swapping them over to another car.

[Dr Terry]

Thanks Dr Terry, great advice and happy to hear about the TH350 cross member, looks like i can scratch a line off my running spreadsheet. I grabbed a pic of the 4L60E transmission serial number tonight (took a fair bit of brake cleaner to cut through the muck) and it seems to be a 4 at the front of the number. Would love to hear more about the Mem-cal options. Cheers

20160817_221852.jpg

OK, the 4HBD trans is the very first type of 4L60E, it has one less solenoid than the later units.

If you use the VS mem-cal it will throw continuous fault codes because it does not match the trans.

I can re-program your mem-cal to suit the 4HBD trans. & remove the VATS (immobiliser security) at the same time.

Dr Terry

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Good to know. I was having trouble visualising a late model engine bay and where the canister might be.

Wouldn't it make more sense to have the canister at the back, somewhere near the fuel tank? I assume the tank is where most of the vapours come from?

Personally, I like to be able to access my battery easily. Probably mostly cause I'm always pulling the buggers out to charge or swapping them over to another car.

The later Commodores do have their canisters under the rear of the car, instead of the engine bay.

The reason for this, is in a carby car the bowl of the carby needs to be vented to the canister also. In an EFI car, it is only the fuel tank that is vented thru the canister, so it can be mounted anywhere in the car between the tank & the engine.

Dr Terry

[damienengland]

Thanks Dr Terry, I would have walked straight into that one. Also great news about the charcoal canister, i will definitely look to move it under the tray during the conversion. Glad playwme asked about it. I will throw a PM at you about the Mem-cal, but have you got any other gems of info for doing a 304 EFI upgrade on a HQ - WB? From my growing knowledge, it seems like a great idea for a car that has to do daily driving.

[wbute]

Yeah I reckon they are the obvious choice. They went unreal and more or less bolt straight in. If they had of pursued the over head cam idea no one would even know what a LS1 engine was.

[Dr Terry]

you got any other gems of info for doing a 304 EFI upgrade on a HQ - WB? From my growing knowledge, it seems like a great idea for a car that has to do daily driving.

Yes, the 5-litre EFI Holden V8 is the perfect choice for the HQ-WB Holden.

The only other advice I would pass on is for the fuel system. Again, copy the factory set-up, they work well.

Instead of mucking around with pick-up pumps, external pumps & surge tanks etc., just fit a factory VT fuel pump MRA assembly. MRA is the acronym for 'Modular Reservoir Assembly'. Basically it is the pump, strainer, surge tank & fuel gauge sender all in one. They are quiet, simple, cheap & reliable, they tick all the boxes.

If you are using the existing Holden ute/van/tonner fuel tank, cut & hole in the top & weld in an adaptor ring. These you can purchase aftermarket & it allows the VT pump unit to drop straight in. They even have the extra fitting for you return line to attach to.

Dr Terry

[damienengland]

Nice weekend in Melbourne, so i thought i'd tinker with pulling an engine apart. I love my 1 Tonner work bench, its so handy for shed tinkering

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[sandasharpe]

The Maywebb engine also had 3 valve heads. Named after Leigh Maguire and Mike Webb, the engineers predominantly responsible for the design. Got overtaken by the LS1 which was more cost effective .