BRC IMPCO Install on 96 GEMS P38

I find hard to imagine that it is possible to drill and tap the inlet manifold in-situ without at least some swarf getting into the inlet ports in the head, something which does not appeal to me :o

Steve

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Originally Posted by TheTree

I find hard to imagine that it is possible to drill and tap the inlet manifold in-situ without at least some swarf getting into the inlet ports in the head, something which does not appeal to me :o

Steve

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I've done it plenty of times, I use a dry sharp drill bit and an industrial blower up the inlet branch or throttle body as appropriate. Then a dry 6mm tap to cut the thread before switching off the blower. I wear safety specs as the shavings fly out of the hole instead of dropping in. Last thing on a LRV8 is to blast a slug of compressed air down each port to see how clean your drilling was. The odd tiny flake of soft alloy left after that won't hurt anything. Did a D2 a couple of weeks ago that way and it didn't miss a beat after starting.

There's nothing stopping you doing it with the manifold off though, replacing an inlet manifold gasket while you're there is good practice anyway if it's getting old.

Hi Jilden

If you say that's the way to do it, then i'll ask the installer how he wants to do it and go from there.

I would rather not take the inlet manifold off since it seems to be in good shape and is about 50,000 Km old.

Thanks for all your help and suggestions

Regards
Steve

Quote:

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Originally Posted by TheTree

I find hard to imagine that it is possible to drill and tap the inlet manifold in-situ without at least some swarf getting into the inlet ports in the head, something which does not appeal to me :o

Steve

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A few little flecks of ally swarf will go through the engine and get burnt off very quickly.
Never had one give trouble in that respect.

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Originally Posted by DasLandRoverMan

A few little flecks of ally swarf will go through the engine and get burnt off very quickly.
Never had one give trouble in that respect.

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Thanks for all your help and suggestions mate :D

Steve

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Originally Posted by TheTree

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

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Hi Steve I was referring to the Thor motors in the Disco2 late P38s, different manifolds
Cheers,
Mario

Hi

Well i have finally got to the point where I booked the LPG install for the 29th

I looked at mounting the LPG ECU beside the battery as Ron B has done but there was not enough room there, so I have mounted it on the back of the battery box.

The convertor is going on the drivers side shock turret since the passengers side has the evap purge valve mounted on it.

Not sure how or where the injector rails are going to be mounted. I am open to suggestions on the positioning of them.

Looks like I am going to be able to avoid the petrol price hike which is coming next month :p

Steve

I can't remember exactly how I fitted up the BRC kit to the last GEMS I had in here but there's enough space on the passenger side in front of the throttle body to mount that side rail. The rail may even have been mounted vertically. The hoses ended up at similar lengths with a bit of a loop to the front two cylinders.

The right hand side was mounted laying back to the rocker cover with hose loops to the manifold. The rails were bracketed to suitable inlet manifold bolts.

Sorry I forgot to take pics of that install.

Thanks Jilden, this guy Alan at AV GAS Woy Woy seems pretty switched on, he has been doing conversions for over 20 years.

He has done a disco GEMS before, but not a Rangie so I am just giving him a couple of suggestions.

Regards
Steve

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Originally Posted by DasLandRoverMan

For best results you want the gas pipes as short as possible and the nozzles as close to the petrol injector position as you can manage.
Generally some disassembly is required to get access to drill the manifold, but a complete removal isn't usually necessary in my experience of doing them (or not at all on a P38).

I've seen a few conversions which had the nozzles half a mile from the petrol injectors, and pipes that were longer still. U surprisingly they didn't run particularly well.

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Sorry to butt in on your thread Steve but what sort of difference is there in having the injectors a fair distance from the original petrol injectors?


It's just that I recently helped work on a GEMS engine with the LPG injectors right near the petrol ones & now I'm helping (sort of) with Thor V8.
The guy with the Thor has fitted the LPG injectors just below the upper/lower manifold joint &, IMO, it seems to defeat the point of having sequential injection when they're so far away.