Rustyv8 Posted January 26, 2022 Share Posted January 26, 2022 Hi folks I have a carbed V8 (from a early 80's RRC) in my 90 and redoing the fuel lines as part of this never ending project 🙂. (There were no fuel lines on it, so i'm starting blind hence my questions...) This has the external chassis mounted pump and filter near the rear wheel. Tank to pump and tank to carb seems straight forward. However the line that runs from the filter bowl up to the carburetor is an 8mm fitting on the filter end, and a very small 5mm fitting (or 6mm?) going into the carburetor. So it seems I need to use a 8mm-5mm reducer somewhere along that run. a) Does this sound correct or am I missing something somewhere (perhaps on the carb end?) b) Where would be the best point in the line to fit the reducer? Closer to the filter or closer the Carburetor itself or does it matter? Thanks in advance guys Alan Quote Link to comment Share on other sites More sharing options...
steve b Posted January 26, 2022 Share Posted January 26, 2022 Feed is 8mm all the way to RH carb ( RHD , not sure if it changes for LHD) then through an 8mm cross feed to LH carb then 6mm back to tank . Did that part number work for the choke cable bracket ? Steve Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 26, 2022 Author Share Posted January 26, 2022 Hi Steve. Interesting. I agree it’s up to the RHD carb (as I look into engine bay) but the only termination is what’s in the pic attached so that’s 6mm nipple max. I do have an 8mm connector on the left carb. So Of course it’s possible whoever rebuilt the engine mixed up the connectors. I’ll take a pic of the configuration tomorrow eland post here and get your feedback if that’s ok. As for the other part number - thanks, I had missed your reply. I replied in the other thread as I can’t seem to get any hit on that. Quote Link to comment Share on other sites More sharing options...
steve b Posted January 26, 2022 Share Posted January 26, 2022 Yes , the connectors are on the wrong carbs . The 6mm male stub to 8mm compression olive are at the tank on the RRC , RHS upper front side to forward end . Steve Quote Link to comment Share on other sites More sharing options...
steve b Posted January 26, 2022 Share Posted January 26, 2022 you probably need cross feed 612505 too? Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 26, 2022 Author Share Posted January 26, 2022 Aha! Ok. So that would seem to be part of the issue then. Thanks! Although if it’s also 8mm to 6mm on the Left side, then I guess I have part of the same question - do in use a reducer, and If so where’s best? I should point out that I have none of the original fuel lines so I’m using all new braided fuel lines. Either way I’ll have to get those swapped around. Unless im wrong, I have the crossover pipe already (as I think that 6mm male stub screws onto that IIRC) either way will get a photo tomorrow Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 27, 2022 Author Share Posted January 27, 2022 Steve (and anyone else that wants to help) - Attached a few snaps of whats there at the moment... As you said, the connectors are probably the wrong way around. The left carb is connecting back into the tank overflow - but via the large 8mm pipe connection you see in the picture. On the right side the 6mm male fitting is missing from the picture, but I have it. So presumably I need to now swap these around. I have the 2 different cross feed pipes (or at least the fittings) however the original fuel lines were so brittle I had no choice but to remove them and fit 6m braided line. Does this setup look ok? (as per your other post, happy to also take the cross feed pipe if you can find one) All feedback and advise appreciated.... Quote Link to comment Share on other sites More sharing options...
steve b Posted January 27, 2022 Share Posted January 27, 2022 I've had a rummage in the "stores" and found a manifold with most of everything on it . In the original RRC install the 8mm feed goes left carb and the return from the right carb in 6mm , my mistake . I've taken pic's on my rather historic old mobile so if it talks to the laptop .... Choke outer anchor bracket is there too . Where are your crankcase breathers routed to ? Otherwise looks nearly ready ? Steve Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 27, 2022 Author Share Posted January 27, 2022 Thanks for taking the time to rummage Steve 🙂 The pic attached is basically the setup I have (this is taken from the Def. 90 parts book not RRC specific). I in interpreted it that the feed IN was to the right carb and the overflow from the left back to tank. But what you said above is that the feed in is going to the left and the overflow from the right? Which is the opposite of the diagram. Could the IN feed really be to the small 6mm male stub? As for the breathers - its been so long since I looked at them I cant remember where I connected them! 🙂 But I do remember the hose was too wide for the point I connected it to - as if there was something missing (like another reducer hose or adaptor or something) Quote Link to comment Share on other sites More sharing options...
steve b Posted January 27, 2022 Share Posted January 27, 2022 you're right my carb/manifold package I found is RRC . I do have a Factory V8 110 engine to check fitting sizes on but the rule is 8mm infeed and 6mm return . Side to side does not matter from an operational point of view . Do you also want the correct choke cross feed pipe and fittings ? Pic's tomorrow Steve Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 28, 2022 Author Share Posted January 28, 2022 Steve - yes, if you have those available happy to take them off your hands also 🙂 Quote Link to comment Share on other sites More sharing options...
steve b Posted January 28, 2022 Share Posted January 28, 2022 Here you go , some pictures of the parts , suitably barn fresh If they look ok for you drop me a pm and we can work out the details Steve Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted January 29, 2022 Author Share Posted January 29, 2022 Barn fresh! Just the way I like them 😂PM sent now 👍 Quote Link to comment Share on other sites More sharing options...
steve b Posted February 1, 2022 Share Posted February 1, 2022 This layout would go with your air filter set up . The difference in pipe stub diameters is matched by the moulded breather pipes to and from the trap cans Steve Quote Link to comment Share on other sites More sharing options...
Rustyv8 Posted February 2, 2022 Author Share Posted February 2, 2022 Thanks Steve - ill check that out and see if it works. Hopefully those tubes/pipes are all still available to buy 🙂 Quote Link to comment Share on other sites More sharing options...
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