RRFPR question

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peter88

Member +
Is there a difference between an fpr and a rrfpr or are they the same thing, for example does a starlet have a standard fpr and when tuning a car u need to upgrade to rrfpr? Also does an rrfpr off a gt go straight on a glanza?

Thanks
 
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cheadder.ep82

Member +
i jus put a sard rrfpr on to my starlet ep82 and my mate has a ep91 and the same rrfpr fits his!! as for standerd ones think there the same on ep82 as ep91!! dont think there is a diff between rrfpr or a fpr!!!
 
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damussi

Member +
i think the difference is the rrfpr raises the fuel pressure with the increase of boost thats y it's named rising rate fuel regulator whereas the fpr jus sends a constant pressure that u set it too and will not pass that mostly suitable for n/a engines, now since we are using turbo's we need the extra compensation just incase we might get a boost spike and also will not lean out ur mapping
 
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