KennethG37S

iTrader: (7)

I feel like losing lots of power after installing HFCs.. any comments?

__________________________________________________ __________________________________________________ _______________'08 G37 Coupe 5AT l SPRT l PREM l NAV l Injen CAI l Falken FK 452's l 15% l Tanabe Coilovers l HKS Hi-Power exhaust l Berk HFC l Betty's grounding kits l New wheels coming soon.

hispeed-lowdrag

iTrader: (7)

That doesn't sound right...I wouldn't say I felt a huge power gain, but the butt dyne felt like a slight rise. In the very least it was the same as before...

Maybe there is a leak or something not on completely?

Lou@Amplified

iTrader: (26)

you will lose a little because less back pressure on the low end. Do you still have the MXP?

KennethG37S

iTrader: (7)

now I have HKS. shoud I go back to stock? lol

Loi

iTrader: (12)

That sucks if you are actually losing power.

Harley'sG

iTrader: (7)

^^Really? I thought no power was lost with the HFC's only with test pipes?

VossenG37S

iTrader: (16)

Wow no way .

NeverBoneStock

iTrader: (25)

you need a tune .. It will come back .

KennethG37S

iTrader: (7)

what kind of tune are you talking about? engine tune u mean?

NeverBoneStock

iTrader: (25)

Yep ....

GraphiteG37S

iTrader: (29)

After all your bolt ons your car with feel sluggish. Your air/fuel ratio is going to be way off. Now it's time for you to dyno tune to unleash the true power of your bolt ons. And fix your a/f ratio.

KennethG37S

iTrader: (7)

Thanks for the tip

GraphiteG37S

iTrader: (29)

Look into uprev, Cobb, hypertech. There should be a bunch of threads on the forum and that helped me make my decision.

KennethG37S

iTrader: (7)

I hear ya another concern for my HFCs would be the Shhhhh sound when I release the pedal, there must be leaking problem? I've never had any problems before modding my car but after I started modding, bunch of defects coming out lol

GraphiteG37S

iTrader: (29)

No defects. It's completely normal. Hfc let out a hiss sound. I'm about the only person who likes it. Lol Don't feel you have defects, cause you bought quality parts. You'll be happy with everything once you get tuned. Made a huge difference for my car.

At the moment your car can't compensate for the added flow. Once you tune the car will be happy. If you're going to HB Saturday I'll be able to talk to you more about it there and answer any questions you might have.