RSTuning
Active Member
The G80 went under the knife during the Christmas break!
First up were some new full frame hybrid turbos from Spool Performance. As you can see in the photos the turbine housings are not modified stock so feature a slightly bigger A/R which should allow them to flow more top end compared to a traditional hybrid. They also come with new silicone intake pipes to take full advantage of the new larger compressor covers.
Next up are some NGK Racing colder plugs, we would have liked to have used a 9 heat rating but at the moment only 8 or 10 was available so we opted for the 10's given the power we are trying to achieve!
Finally we've made a modification to the Precision Raceworks AFS kit, the one we were running was using a pair of Walbro 535 pumps but as they don't have a check valve both had to be running together, this is probably fine when using on demand and activated with boost but to enable us to have any form of port injection safety we had to run them all the time, if fuel pressure dropped MHD would put the car into limp which is great but not so great if you wanted to have the pumps switching off while not needed as this would also put the car into limp. To overcome this issue we've changed one of the pumps to a Walbro 525, these have a built in check valve (one way valve). This enables us to power only the 535 and activate the 525 when demanding much more fuel I.e. when running high ethanol blends. Both pumps are controlled with the OEM ECU and Motiv Reflex via MHD+. This has made the fuel pumps much quieter which is good as it was very noticeable with both running when sat queuing in traffic! It should also keep the fuel temperature lower and not have anywhere as much load on the wiring.
Fingers crossed there's some free time to get it on the dyno tomorrow to see what it makes on pump fuel before we go onto ethanol again
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First up were some new full frame hybrid turbos from Spool Performance. As you can see in the photos the turbine housings are not modified stock so feature a slightly bigger A/R which should allow them to flow more top end compared to a traditional hybrid. They also come with new silicone intake pipes to take full advantage of the new larger compressor covers.
Next up are some NGK Racing colder plugs, we would have liked to have used a 9 heat rating but at the moment only 8 or 10 was available so we opted for the 10's given the power we are trying to achieve!
Finally we've made a modification to the Precision Raceworks AFS kit, the one we were running was using a pair of Walbro 535 pumps but as they don't have a check valve both had to be running together, this is probably fine when using on demand and activated with boost but to enable us to have any form of port injection safety we had to run them all the time, if fuel pressure dropped MHD would put the car into limp which is great but not so great if you wanted to have the pumps switching off while not needed as this would also put the car into limp. To overcome this issue we've changed one of the pumps to a Walbro 525, these have a built in check valve (one way valve). This enables us to power only the 535 and activate the 525 when demanding much more fuel I.e. when running high ethanol blends. Both pumps are controlled with the OEM ECU and Motiv Reflex via MHD+. This has made the fuel pumps much quieter which is good as it was very noticeable with both running when sat queuing in traffic! It should also keep the fuel temperature lower and not have anywhere as much load on the wiring.
Fingers crossed there's some free time to get it on the dyno tomorrow to see what it makes on pump fuel before we go onto ethanol again
(Feed generated with FetchRSS)
Continue reading...
