Fuel consumption after De-cat

[mr2turbo99]

Hi Guys

just a quick one.....does the fuel consumption typically go up or down after doing a decat? Or does it remain the same. Sounds strange but ive heard conflicting reports.

Thanks

[JM_16v]

i believe it will go up slightly

[mr2turbo99]

yer most people have said that. I was hoping that was the case.

[RobCrezz]

Depends how you drive it though, as decatting also raises the boost. If you use more boost then you use more fuel

[mr2turbo99]

tis true! Mines a daily driver so i dont rag it everywhere. Does a De-cat raise the boost in 1st and 2nd to? Because my understanding is that it is limited to around 7psi

[RobCrezz]

tis true! Mines a daily driver so i dont rag it everywhere. Does a De-cat raise the boost in 1st and 2nd to? Because my understanding is that it is limited to around 7psi

I think thats right if you still have the vsv plugged in. Otherwise you still dont tend to get full boost in first anyway, as its over too quickly.

[Dan88]

yep ive noticed that, with my vsv recently disconnected, first feels much the same, but i can normally reach just under full boost in second which is different to before, which will therefore use more fuel

[mr2turbo99]

cool. well before i start removing vsv i need to get a boost gauge and MBC so i know where im at

Thanks for the info