What's the power difference of F.I cbe with/without f.i hfc?

Originally Posted by Majestik

Hi guys,

Advice pls. I've got fi bits on order but am considering cancelling my hfc-pipes because of what I've read about the drone/hiss issues.

I quite enjoy the car's dual personality where the sound is 'unintrusive' during normal driving with an increase in noise when drivin agressively, and I hope to retain a bareable interior volume.

My question is how much rwkw/rwhp will I actually lose with ONLY the cbe and also what's your opinion on whether the power difference would noticeable.

I was told by my tune-shop that my mate's (Bezzita) FI cbe and berk hfc dyno only showed a difference of 4rwkw between having a hfc and not.

I was under the impression that there would be a bigger difference.

Basically - Is the power gain from the hfc-pipes worth the drone/hiss/EPA issues for my daily driven car.

I'm 11 people away from completion (#137) and require your expert advice asap so I can advise Tony of changes or find a local buyer of the hfc-pipes I've ordered.

Thanks!