What boost do you run ?
What boost do you run ?
What boost do you run and what effects boost on the G40 ?
Mine runs at 0.6 bar - does anyone know what is standard ?
Mine runs at 0.6 bar - does anyone know what is standard ?
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Mine was running about 1.15bar of boost at its best, but the belts are slipping now and its down to just under 1.0bar at redline.
Plan to fit some toothed belts to eliminate slip altogether, which should bring it back up again.
Boost is essentially controlled by how fast the charger is spinning. Fitting a smaller pulley will up the boost. However, you can also have your charger rebuilt, and in the process have the inlets enlarged and/or ported/polished which will also see a gain in boost.
Jabbasport are the main company in the UK to do this work for you - though there are others...
-andy-
Plan to fit some toothed belts to eliminate slip altogether, which should bring it back up again.
Boost is essentially controlled by how fast the charger is spinning. Fitting a smaller pulley will up the boost. However, you can also have your charger rebuilt, and in the process have the inlets enlarged and/or ported/polished which will also see a gain in boost.
Jabbasport are the main company in the UK to do this work for you - though there are others...
-andy-
I was getting about 0.55 to 0.6 before my rebuild and toothed 65mm pulleys. I had my charger rebuild by Steve at www.Pitstopdevelopments.co.uk they are a bit cheaper than Jabba and do a real good job and can lend a charger while they do yours
It was given ther full blend treatment, I have now fitted a GT inlet manifold which decreses back pressure and boost and I get over 1.1bar at full pelt. The car goes like a rocket, I thought it wa quick before!
It was given ther full blend treatment, I have now fitted a GT inlet manifold which decreses back pressure and boost and I get over 1.1bar at full pelt. The car goes like a rocket, I thought it wa quick before!
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Boost can depend alot on the inlet port sizes and TB sizes etc mine has had a stage 3 head which has opened it up a huge amount and the valves have been profiled, it's also got a gt inlet manifold which has been opened up abit. the charger is full blend with 65mm toothed pulleys. It's creating 0.9 bar at full revs, which is brilliant in terms of the amount of air getting into the engine.
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no, its at about 6k andy. it gets to about 11-12 psi pretty much straight away & then slowly builds up to 13.5-14 after that, well i say slowly but its in a matter of about 1 or 2 secs.
so it builds upto almost full boost much earlier than 6k. but I'm going to start tearing my hair out soon if i dont get my bloody twin inlet collars!
so it builds upto almost full boost much earlier than 6k. but I'm going to start tearing my hair out soon if i dont get my bloody twin inlet collars!