Thread: BRC IMPCO Install on 96 GEMS P38

I did a second hand Impco BRC install to a '97 GEMS last year and he's having trouble with the TB heater circuit. I will be doing the tees when I see him next. I'm pretty sure I mounted the gas ECU to the back of the battery box and the converter nearby. The injectors were mounted in two banks, DS just over the rocker cover and the PS angled in from the front, using a tee piece in the delivery hose.

I don't remember taking any pics of that one but if I get a chance I'll take some and post them up.

Hi Jilden,

Thanks for that; That area seems to be the best spot since the shock turret is a good place to mount the convertor.

I have an electrical distribution panel mounted on the back of the box ATM so it might be easier to move that than find another spot for the LPG ECU

Also my rail is a single piece but it's joined in the middle so it could be made into two easily.

Looks like T-Pieces off the heater hoses are the go rather than the throttle body hoses.

Thanks mate
Steve

On closer examination I found a couple of other bits, which I assume are a part of the system, one of which appears to be broken. Pics attached.

The hoses have definitely been plumbed into the heater hoses via a T-Piece so that's relatively easy. I think I will put new hoses on when this is done.

The switch is a bit of a battleship maybe I can get something a little smaller!

Thanks again
Steve

1. The spare bits don't look like LPG bits to me at all, unless you find where they were plugged in I'd chuck 'em.

2. Water tee pieces should be made of brass in any case. I assemble my own tees using 19x19x16 tees with 10mm nipples threaded into the 16mm part. That allows better flow to the heater and better sealing into the existing hoses.

3. The switch simply pushes out of its housing and can be mounted in a flat panel. I can't remember exactly where I put it but it may have been mounted into the front lip of the plastic panel under the steering column. There is just enough space in one spot, you may have to trim some plastic behind the drop panel.

Thanks mate

I'll double check about those bits with the installer, but I think they are stray bits from the wreckers

The t-pieces on this are made of brass

I think I have a spot for the switch once it's out of that housing

Regards
Steve

Done a few P38's, wouldn't rate the BRC system though, if nothing else (when I was doing em) there wasn't facility to configure the gas ECU to the car.

I usually put the ECU in the battery box next to the engine one, injector rails sat on top of the rocker covers (THOR engines had a better trick for getting the pipes in) whilst the vapouriser usually ended up on the N/S/F inner wing next to the suspension compressor. Theres a few threaded studs down there you can attatch a bracket to which helps some, plus a lot more space over that side than trying to wedge it in on the drivers side.

T the water pipes into the heater circuit, and make sure (if youre putting the vapouriser on the passenger side) that your pipework sits low enough as you can get into the coil packs or changing leads becomes more of a **** of a job.
I wouldn't use the throttle body heater hoses to warm the vapouriser over here (in the UK) as I doubt there would be enough flow to prevent the vapouriser freezing up in some of the cold we get, but as it's generally a lot warmer over there you could probably get away with it?
Either way, into the heater circuit is a better way.

On a slightly different note, in Mario's thread he said

"LPG fitters take the intake plenum off to drill and fit the injector nozzles."

My question is;

Do they really leave the inlet manifold in place to drill and tap it, or are they putting the injector pipes into the plenum or trumpet base?

Steve

I found this thread which answered my question!

Considering LPG on my 4.6 GEMS

I have a spare manifold so I will give that to the Installer and he can modify it. Then I will fit it with my new carbon fibre intake trumpets and Gen III injectors and make sure the motor is running nicely on petrol

Then off to the installer for the rest of the work

Steve