The Supertrapp Project
Thread Starter
Safety Car
Joined: Nov 2009
Posts: 3,970
Likes: 340
From: Adelaide South Australia
The Supertrapp Project
Update; video in post #22.
Not to be confused with the Alan Parsons Project (only Austin Powers fans will get that joke !) After seeing the youtube video on the 87/88 Callaway twin turbo with its 4 Supertrapp mufflers I was impressed with the looks and sound of the setup,
http://www.youtube.com/watch?index=2...C800CB78858FF7 ,
Then I found a 4 x Supertrapp setup off a c4 on fleabay, so I started wondering, could these things propell my 85 to 254 mph ? probably not without the twin turbo callaway engine but it would look and sound cool
anyway after some spirited bidding I won the setup for the princely sum of $22
I had to have them freighted half way across oz so that was a bit more than the cost price but here they are
So now I have another project on my hands, do any of the other members have experience with the supertrapps and does anyone have photo's of the setup on their C4 ?
Not to be confused with the Alan Parsons Project (only Austin Powers fans will get that joke !) After seeing the youtube video on the 87/88 Callaway twin turbo with its 4 Supertrapp mufflers I was impressed with the looks and sound of the setup,
http://www.youtube.com/watch?index=2...C800CB78858FF7 ,
Then I found a 4 x Supertrapp setup off a c4 on fleabay, so I started wondering, could these things propell my 85 to 254 mph ? probably not without the twin turbo callaway engine but it would look and sound cool
anyway after some spirited bidding I won the setup for the princely sum of $22
I had to have them freighted half way across oz so that was a bit more than the cost price but here they are
So now I have another project on my hands, do any of the other members have experience with the supertrapps and does anyone have photo's of the setup on their C4 ?
Last edited by blackozvet; Dec 3, 2011 at 01:13 AM. Reason: update
Burning Brakes
Joined: Jun 2005
Posts: 1,188
Likes: 13
From: Wallingford Vermont
Wow I haven't seen 'Trapps since the '80's. Ya, I had one on the back of my '84 turbo (Callaway believe it or not) VW GTi 
That was years ago, so my experience is pretty dated I went with the Trapp because it was the only muffler that would fit on the 3" pipe and still clear the spare tire well without rubbing. My friend says it was so the inspection station couldn't put the exhaust probe in there 
Post up some pictures after the install.
That was years ago, so my experience is pretty dated
I went with the Trapp because it was the only muffler that would fit on the 3" pipe and still clear the spare tire well without rubbing. My friend says it was so the inspection station couldn't put the exhaust probe in there Post up some pictures after the install.
Thread Starter
Safety Car
Joined: Nov 2009
Posts: 3,970
Likes: 340
From: Adelaide South Australia
Hi Dan, like your avatar - that is a photo from the Targa Tasmania ?
I have started taking them apart and cleaning up everything,
cleaning up the pipes with some wet and dry below,
each pipe has 9 baffle plates in them, buffing the carbon off the plates and cleaning up the end plates,
Bought some new stainless fasteners and half way thru the clean up.
I have started taking them apart and cleaning up everything,
cleaning up the pipes with some wet and dry below,
each pipe has 9 baffle plates in them, buffing the carbon off the plates and cleaning up the end plates,
Bought some new stainless fasteners and half way thru the clean up.
Burning Brakes
Joined: Jun 2005
Posts: 1,188
Likes: 13
From: Wallingford Vermont
Funny, in the U.S. Army we had a little 1.5KW generator, powered by a Yanmar diesel with a Super Trapp spark arrester (no muffler just the baffle plates). Being on a diesel every now and then they would soot up and the engine would run like crap! First time I thought something was seriously (mechanically) wrong. Then I, finally, checked the exhaust
Never had an issue with the Trapp on the VW.
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
supertrapp were the pipes to have on the old school 4 stroke 3 wheelers...
great sound, could change the amount of discs, and helped power.
A lot of those bolts securing the discs would snap off, so I hope this did not happen to you.
Some parts can still be had through supertrapp, but I do not know if all the discs are universal.
great sound, could change the amount of discs, and helped power.
A lot of those bolts securing the discs would snap off, so I hope this did not happen to you.
Some parts can still be had through supertrapp, but I do not know if all the discs are universal.
Thread Starter
Safety Car
Joined: Nov 2009
Posts: 3,970
Likes: 340
From: Adelaide South Australia
Hi Deepa,
after pulling everthing apart you can see that an exhaust system is not a good place to be if your a fastener ! Most of the stuff in these mufflers is stainless, but for some reason they thought it was a good idea to use round nuts on the long hex bolts that run thru the discs, i had to buy a pair of pointy nose grip pliers to get in there and keep hold of them to get the bolts undone
anyway I have bought all new stainless fasteners and am most of the way thru the clean up and rebuild, nearly time to book a trip to the exhaust place.
after pulling everthing apart you can see that an exhaust system is not a good place to be if your a fastener ! Most of the stuff in these mufflers is stainless, but for some reason they thought it was a good idea to use round nuts on the long hex bolts that run thru the discs, i had to buy a pair of pointy nose grip pliers to get in there and keep hold of them to get the bolts undone
anyway I have bought all new stainless fasteners and am most of the way thru the clean up and rebuild, nearly time to book a trip to the exhaust place.
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Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
I have twin supertrapps 17 baffles each.. limited design for a f body. 2-1/4 in and out. I tested on my C4 in place of the resonator.
Yours should look pretty mean.. need pics once in place... With quads I would say 9 - 10 baffles each
Yours should look pretty mean.. need pics once in place... With quads I would say 9 - 10 baffles each
Last edited by THE 383 admiral; Nov 23, 2011 at 11:22 AM.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
I have my supertrapps on.. for a sound test.. pic's would be embarrassing
It's a tight fit in the middle with two 5" rounds or re-work the muffler eliminator section to accommodate 20" of straight... pic of limited supertrapps
I will record ASAP very impressive
It's a tight fit in the middle with two 5" rounds or re-work the muffler eliminator section to accommodate 20" of straight... pic of limited supertrapps
I will record ASAP very impressive
Last edited by THE 383 admiral; Nov 23, 2011 at 07:40 PM.
Drifting
Joined: Aug 2011
Posts: 1,861
Likes: 1
From: panama panama
very good job on the exhaust.
my vette is also balck. I like what you did with the white corvette letters in the back.
what is that. paint???? did you paint that letter. what kind of paint did you use???'
my vette is also balck. I like what you did with the white corvette letters in the back.
what is that. paint???? did you paint that letter. what kind of paint did you use???'
Pro
Joined: Feb 2009
Posts: 711
Likes: 3
From: charlottesville Virginia
Sorry for my ignorance, what is the benefit of these? I've always thought you want the exhaust to flow as easily as possible, where as these seem to add an obstruction at the end of the system. I know callaway used them so Im not doubting them or saying they are no good, I just dont understand what you are trying to accomplish with them.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
The answer to your question.. unlike a muffler.. you can tune the sound on supertrapps. the more baffles you install.. let's more air flow through... 1 baffel is very restrictive
So the more you see at the end on this design... You will hear exhaust loud and clear
So the more you see at the end on this design... You will hear exhaust loud and clear
Last edited by THE 383 admiral; Dec 1, 2011 at 09:24 PM.
Melting Slicks
Joined: Jul 2008
Posts: 2,268
Likes: 142
From: Ottawa Ontario
Thread Starter
Safety Car
Joined: Nov 2009
Posts: 3,970
Likes: 340
From: Adelaide South Australia
Hitmanpty - they are the silver letters, its just the camera flash that makes them look white,
thanks for the positive comments, and the answer is;
these things sound fantastic ! i was more than pleasantly surprised, I really didnt know what to expect, I listened to the callaway car in the video and hoped it would be similiar,
after I modified the engine I had the dreaded resonance in the cabin, the supertrapps got rid of it , it now has a much more noticeable v8 rumble to it, and a smoothness to it, when you look at the pipes and see how it looks "closed off" you cant imagine it would sound right, but it does. I dont know if its my imagination but it seems to run better too.
Will have to consult with the 16 yo son and see if i can post a video to give an idea of the sound.
thanks for the positive comments, and the answer is;
these things sound fantastic ! i was more than pleasantly surprised, I really didnt know what to expect, I listened to the callaway car in the video and hoped it would be similiar,
after I modified the engine I had the dreaded resonance in the cabin, the supertrapps got rid of it , it now has a much more noticeable v8 rumble to it, and a smoothness to it, when you look at the pipes and see how it looks "closed off" you cant imagine it would sound right, but it does. I dont know if its my imagination but it seems to run better too.
Will have to consult with the 16 yo son and see if i can post a video to give an idea of the sound.