mudnut's 'Old Trol' build thread.

[Bloodyaussie]

No dont bother..

[threedogs]

you are going up in size are you ?

[mudnut]

I just need to get a good, solid system, and I have seen, first hand, how a good set of extractors can let the engine breathe. I understand that having too big a system can actually slow the gas flow.

[lhurley]

I just need to get a good, solid system, and I have seen, first hand, how a good set of extractors can let the engine breathe. I understand that having too big a system can actually slow the gas flow.

Half right, it slows it because there isn't enough pressure to push it through at speed. Just think about it as if it were a hose, water coming out the end of the hose flows well but not with any real pressure. Put a nozzle on it and it has plenty of pressure cause the outlet is smaller

[BigRAWesty]

Slap a 2.5" system on it mate.
I'm sure we can graft extractors into the original system untill funds permit the rest.
I can mod while you fix my dash..

[mudnut]

Sounds like a plan. I will rip off a few heat shields and see exactly where the hole is.

[mudnut]

As a matter of interest, I have been reading up on fitting EFI to the Old Trol, with the end objective of fitting a turbo. I have read about Single Point EFI on early Falcons. Apparently the system with the injector situated after the butterfly is way better.

I was wondering if it would be easier to fit that, instead of having to get a new EFI head, loom, fuel pump etc. Any thoughts?

[Bloodyaussie]

I think this is right up Georges alley .... he even had or has gear I think for it?? but I have been known time and time again to be so very wrong !!!

[BigRAWesty]

Imo fit the fuel injected system with injection into cylinder.
The single point was very uneven with fuel distribution and 1 & 6 received less than 3 & 4.
The multi point is more efficient also with better power output.
But price is always an issue.

[mudnut]

The carby has the same problem. Multi point is way better, Kallen. My 4wd Corolla 4 banger had that with extractors, and it went like a cut cat.

I am also looking at ease of installation and overall cost, as well simplicity.

I recently met a young bloke who has acquired a twin turbo set up with all the required plumbing. He was going to convert his stock RB30 to EFI and leave it as a duel fuel system with the turbos.

As the vehicle was only going to be used as a weekend warrior and for towing, we convinced him to just run LPG via a Gas Research Carby as that would be way easier, and he can tune it for maximum horsepower.

I have read that the carby can starve for fuel on steep hills. I haven't experienced it yet, and don't intend to get stuck halfway up a huge sand dune with no way of getting back down.