Leaning towards GHL Exhaust??? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

RandallNeighbour · 11-10-2008, 07:33 PM

I have a twin chamber aftermarket muffler and like the GHL and others, it has bad cabin resonance. None of the manufacturers will tell you just how much there is until it's too late.

If you want the glorious sound outside, you gotta pay the price inside with noise loud enough to give you a headache.

I think Fabspeed has a good loud muffler that is guaranteed not to have resonance or something of the sort.

Word up.

GQ IMAGE · 11-10-2008, 07:39 PM

Quote:

Originally Posted by RandallNeighbour

I have a twin chamber aftermarket muffler and like the GHL and others, it has bad cabin resonance. None of the manufacturers will tell you just how much there is until it's too late.

If you want the glorious sound outside, you gotta pay the price inside with noise loud enough to give you a headache.

I think Fabspeed has a good loud muffler that is guaranteed not to have resonance or something of the sort.

Word up.

How bad is the resonance in the Boxster? The Ferrari has some, but only under throttle, if you are crusing in the Boxster at 65pmh on the highway, is it that bad?

Cloudsurfer · 11-10-2008, 08:30 PM

The current FabSpeed system sounds great, and does not have any resonance. The GHL is pretty bad whenever you're under 3000RPM.

23109VC · 11-10-2008, 08:53 PM

the fabspeed system looks pretty pricey - and do you get ANY power?

ChrisZang · 11-10-2008, 09:08 PM

Quote:

Originally Posted by GQ IMAGE

How bad is the resonance in the Boxster? The Ferrari has some, but only under throttle, if you are crusing in the Boxster at 65pmh on the highway, is it that bad?

Between 2,000 ~ 3,200 RPM the resonance is EAR DEAFENING !!!!!
This might not be a problem on the freeway but believe me I was once stuck in a stop and go traffic jam for about an hour and by the end of it my ears where ringing (literally - as if I just walked out of a Heavy Metal concert)
I had a GHL for 1+ year and eventually sold it.
Above 3,200 RPM it sounds great - below it KILLS you!

P.S.: Some of the YouTube clips where you can hear a GHL might be from me ;-)

RandallNeighbour · 11-11-2008, 07:55 AM

65 mph in 5th on the freeway isn't bad on the cabin resonance.

However, 55-60 in 5th is horrid because the revs are in that nasty 2-3k range.

I am about to yank off my Che muffler and put my factory muffler back on with bypass pipes welded on to give it a little more growl.

With the top down on a day I am just driving around back roads tearing it up, it's a wonderful setup. The howl at 6k is glorious and ear candy.

However, I have found myself doing far too much shifting to get away from the 2-3k area where I get headaches or actually suffer some temporary hearing loss if stuck in traffic for an hour or more. The extra shifting into lower gears is not only stressful, it's hard on the motor to be kept at higher RPM's than necessary.

All this to say that quieter is more important to me, my hearing, my level and number of headaches, and sanity.

Thank God I was given the muffler for free to test it out! I would be very unhappy right now if I had shelled out $500 or more for this thing only to discover it's great for the track, but not for any other time I drive my car.

I think I will go back to a modded factory muffler and go a completely different route when my motor blows and I replace it with a Raby 3.4 that's been bored out to a 3.6. I will need a 996 customized exhaust system then.

jmatta · 11-11-2008, 08:46 AM

Find a welder to do this mod...for under $100, you can have a factory muffler that sounds great. I have Fabspeed secondary bypass pipes and a modded muffler; my car sounds incredible and NO resonance.

Cloudsurfer · 11-11-2008, 02:46 PM

There are gains to be had by swapping exhausts on these cars, but you must include the headers if you want anything remotely significant. I am running the TurboWerx headers with the FabSpeed exhaust and its a great combination.

GQ IMAGE · 11-11-2008, 06:50 PM

You guys are killing me!!! I will start looking at Fab Speed again on youtube. You make the GHL exhaust sound horrible!!! Does the Fab Speed sound as good?

chaudanova · 11-11-2008, 07:46 PM

I've got a Brand New GEMBALLA stainless steel exhaust system available if anyone wants it, PM me...

23109VC · 11-12-2008, 05:12 PM

Quote:

Originally Posted by jmatta

Find a welder to do this mod...for under $100, you can have a factory muffler that sounds great. I have Fabspeed secondary bypass pipes and a modded muffler; my car sounds incredible and NO resonance.

the bypass pipes are the ones that connect to the muffler?? I assume this means you have STOCK headers - not fabspeeds??

can you buy JUST the fabspeed bypass pipes but keep/use the stock muffler. I would think that would cut down the costs quite a bit...

Cloudsurfer · 11-12-2008, 09:39 PM

Quote:

Originally Posted by 23109VC

the bypass pipes are the ones that connect to the muffler?? I assume this means you have STOCK headers - not fabspeeds??

can you buy JUST the fabspeed bypass pipes but keep/use the stock muffler. I would think that would cut down the costs quite a bit...

Yes you can. The stock muffler is actually not that restrictive, but the factory headers are atrocious.