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Several busa-powered buggies I know of but that came down to dirt ingress past the tank breather.
In terms of what a prematurely worn pump will do to your performance; my petrol-engined Nissan Patrol was running like shit and I suspected it was lean, so after checking compression, valve clearances, injectors, filters, etc I fitted a wide-band oxygen sensor and data logger to check just how lean the air-fuel ratio (AFR) was:
19.5:1 !!!!
Stoich is 14.7:1 and a busa likes to be around 12.5 - 13.5:1. I rechecked injectors, lines, and replaced all filters. No change. I re-checked fuel pressure before and after the regulator. Very low, far lower than the service limit. So I jury-rigged a Bosch fuel pump I had lying around, the pressure was a tad higher than Patrol spec as was the volume. Now running too rich (for a car) 12.5:1 - but it transformed the Patrol! Goes like stink. Chews fuel faster than a Busa on Nitrous.
In terms of what a prematurely worn pump will do to your performance; my petrol-engined Nissan Patrol was running like shit and I suspected it was lean, so after checking compression, valve clearances, injectors, filters, etc I fitted a wide-band oxygen sensor and data logger to check just how lean the air-fuel ratio (AFR) was:
19.5:1 !!!!
Stoich is 14.7:1 and a busa likes to be around 12.5 - 13.5:1. I rechecked injectors, lines, and replaced all filters. No change. I re-checked fuel pressure before and after the regulator. Very low, far lower than the service limit. So I jury-rigged a Bosch fuel pump I had lying around, the pressure was a tad higher than Patrol spec as was the volume. Now running too rich (for a car) 12.5:1 - but it transformed the Patrol! Goes like stink. Chews fuel faster than a Busa on Nitrous.