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.

 

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?

 

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

 

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

 

That sucks if you are actually losing power.

 

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

 

Wow no way .

 

you need a tune .. It will come back .

 

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

 

Yep ....

 

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.

 

Thanks for the tip

 

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

 

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

 

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.