HPFP necessary or not?
Hi guys I have a Corksport SRI & TIP as well as a Cobb AP with the stage1 ots map runs great and I love it. But I was thinking of up grading the stock Intercooler for an aftermarket top mount and came across varied views on the need for an upgraded HPFP.
I have been having a look round the cobb site and found this…
https://cobbtuning.zendesk.com/entri...sure-Fuel-Pump
Mazda DISI High Pressure Fuel Pump
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Aaron
posted this on November 09, 2012 02:22 pm
The Mazdaspeed DISI engine has proven to be a remarkably stout and tunable platform. That being said we have found that it has one major limitation, the factory "High Pressure Fuel Pump" .
Unlike a traditional fuel injected gasoline engine that runs a relatively low fuel pressures, roughly 30-40psi. Mazda's Direct-Injection requires very high fuel pressure upwards of 1,600psi. This is accomplished with a mechanical fuel pump driven by the valve-train.
This mechanical fuel pump is unfortunately undersized for the engine. When we make more power from these engines it is not uncommon for fuel pressure to drop and the engine to run lean.
If you own a Mazdaspeed and plan to run one of our higher performance maps such as any Stage 2 map or even a Stage 1+Inter-cooler map you will need to upgrade this pump, the exception being some Mazdaspeed6/Mazda 6 MPS/Mazda Atenza MPS vehicles which has a more capable pump from the factory. It is important to monitor your fuel pressure!
So how do we work out if we here in Australia have a up rated HPFP?
I'm not keen on spending the extra coin on a pump if I don’t need it and I’m not looking to tune it massively in the future. However I don’t want to get the IC and discover that it causes issues.
Any and all input is greatly appreciated.
Pete