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Hello, I'm French, and I'm here because I don't find enough answer in my country... I have a 1.1L engine GG code (same as HB engine) fitted on a Golf mk1. Nobody in Golf want to tune a "small black", Polo guys know very well ! I want to put twin DHLA or DCOE carbs, but I have few questions... - I don't find many 1.1L fitted with twin carb, but a lot of 1.3L. I want to keep my original engine, so is it possible to have good results ? - The head is a mechnical, and I don't know if a "performance" camshaft exists for this type of head ? - The head has holes for heating the original carb, so I have to close them ? Because the manifold for twin car I find don't close them. - For the fuel pump, the original with a filter king is enough ? Or I need to put an electric pump ? Thanks for your help, and sorry for my bad English...
Pretty happy how the engine is running now on the twin DHLA40s, especially now the accelerator pedal can open the throttle plates fully Running 30mm chokes with 119 main jet and 200 air corrector. It's all good until about 6100rpm when it becomes a bit sluggish. It's not leaning out, I've played with smaller air correctors and 130 main jet and holey .10 emulsion tube and race tubes both .5 and .7 and I can vary the mixture from 13.2:1 to 12.3:1 at 5500rpm. It's not over rich, a 116 main jet gives 12.8:1 and behaves much the same at high end, but starts a bit late, so midrange is weakened, and I'm not extending idle jet or messing with progression holes to counteract. Once I reach 6000rpm there's some hesitation. I know engine will hit 6800rpm with the Pierburg or a twin choke Weber DMTL on the GK manifold. I'm using trumpets with Ramair foam socks. They are a bit close to the firewall, but I think I can see ram effect pressure (from -8psi cruise vacuum to +0.3psi). Three ideas 30mm chokes are too small foam filters are compressing into the trumpets to not let air through the Aldon Amethyst rev limiter is very subtle (set for 7000rpm, original Dignition limiter is 6800rpm and sudden) So, realising the dello's have been on for 2 years I have given the foam filters a good clean with the raidHP/ramair cleaner and I'll re-impregnate them with the correct polymer snake oil. Might have a short blast without the filters. Or try again with a Sorg inlet plenum but that makes jet changes annoyingly hard.