2.4T and megaphones

[Rico]

can anyone with experience in this exhaust combo
comment. will the 2.4T with mfi motor lose power if i change
from the dansk 2 in 1 out muffler to the megaphones?

[Rico]

Since no one has responded to this thread, I guess since 1972,
megaphones have never been installed on MFI 2.4!

[rick2]

Hey Rico, I have them on a 2.4S with carbs. I have heard that you really need the back pressure for the MFI. But I have no experience. Trying to go from a carb guy to a MFI guy!

[Mr9146]

I had a 2.4S with MFI and a sport muffler. I put megaphones on and it ran like doo doo at part throttle but went like a bat out of hell with the throttle whacked all the way open.

The muffler creates back pressure - something MFI cars seem to need/love.

The megaphones will adversely affect the way the car runs unless you retune the MFI to the megaphones. My advice (which isn't worth a damn) is to leave things the way you've got 'em.

A special side note: my car actually ran BETTER when I ditched the sport muffler in favor of a stocker. Again, more backpressure.

Good luck.

[RickS]

When my 2.7 RS spec with MFI was being built, I had the same conversation with my mechanic - he has 30 years working on 911s. He stated what the others have said, you do need backpressure or your performance will suffer. You could probably get by with a dual-out but his recommendation - which I went with was a single-out Danske sport. I have no regrets, but it certainly does not have either the look or sound of megaphones.

[Rico]

Thanks for the response guys.
It really helps make my decision.