Guys,
Whats your feelings on super trapps? They are very cheap and can be replaced easily. You can save a lot of money going this route... How are the gains/noise. I assume a lot of people use them on the track, but are they street legal?

 

No opinions?

 

I have one on my '95 GSR and I like it (got it last year). I didn't know the proper ways to handle the Trapp last year and stripped the bolts which required a new core. I talked with the SuperTrapp folks and they invited me over to the factory (they are located in Cleveland, not too far from where I work). The factory was pretty cool and they hooked me up pretty nicely! Their customer service is awesome.

If you get one, there's a bunch of stuff you will want to know before you start tweaking it (all dealing with how to handle the disks). Fire off an email to me and I can go into much more detail.

The folks at SuperTrapp say the Trapp is legal in all states, but in Michigan the max number of disks you can have installed is 8 (if I remember correctly). Michigan must have some sort of sound ordinance.

The folks at SuperTrapp say for our cars, 8 disks is ideal (good balance between sound and performance). For autocross, I remove all the disks which makes it very loud, but the car seems to perform better. Depending on my schedule, I will daily drive with all the disks off - its loud, but liveable (a lot of fun to mess with your passengers when they are trying to hold a conversation).

I've kept the factory muffler so I can have it re-installed for winter. I'm not sure how well the core can handle winter. The folks at SuperTrapp said they can run in winter without any problems (although they didn't say anything about rust).

Yes, the core can be replaced rather easily (I've had it done). After a couple months of use, the core is wedged in there and so I took it to a shop to have them yank it out. Installing the new core is very easy and only 2 screws.

On a side note, you can easily hear the difference when the secondary intake runners open up.

 

Astro Thanks for responding!

Just a thought, but if they are street legal then how do they put the sniffers in the muffler when you go for emissions testing? Also, How loud is it with 8 Discs? I daily drive the car and want to be able to think. I never thought about winter, but that could be a problem. How do you have yours setup? Like do you have a cat? Do you have a straight pipe to like a 2.5" super trapp? Looking for more info! Thanks!

 

I have one on my Subaru... http://www.pbase.com/soloracer/supertrapp

Its pretty damn loud, but I run it wide open all the time. I also had one on my Type R and 6 discs was fine for street driving, but I ran it wide open at the track/autox. I dont think you can beat them for the weight and cost.

 

With no disks, the Trapp is loud.

With 8 disks, its noisey. Maybe if I put it this way: when cruising around (20-40mph) you don't really need to do anything to the radio volume. At highway speed, I find I need to bump the volume up some. With 6 disks its a bit better and even quieter at 4. Four disks would be the minimum you would want to put on and you will definately get more back pressure, but it feels like the car is working way too hard on the free way (and becomes somewhat unresponsive).

I do value my thinking time in the car and running wide open sometimes can drive me nuts if I've been running it like that for 2 weeks or more. For me, eight disks is about perfect. Eight impresses my coworkers (one is a Saab Viggen driver and I let him take my Teg out and he loves the sound of the Trapp). If I need to impress the ladies, then I bring it down to 6 (the ladies say its pretty loud, but think its cool - although they wouldn't put one on their car).

In Cleveland, all (at least newer) cars must pass emissions. So the cat. stays on and last year I just removed all the disks. Didn't have any problems or complaints the car passed just fine. I was tempted to leave the disks in there to see their reactions, but decided I wanted an easy emissions testing experience.

 

Regarding winter - I don't find it a big deal... Here's what I recommend doing (I kind of did this backwards - which was a lot more expensive)

When you get the SuperTrapp installed, ask them to remove the factory muffler, but keep the C pipe that its attached to in one piece. On the '95 GSR, it unbolts right by the right rear wheel. Ask them to unbolt it and remove it.

The next trick is to have them put new pipe in with the same collar as the one the factory one had so it bolts right up to the B pipe (if that makes sense). Then when winter comes, you can unbolt the SuperTrapp and bolt in the factory muffler.

When I went to have the SuperTrapp installed, the muffler shop just cut the C pipe just before the factory muffler and let the factory muffler drop. I didn't think I would save it and it was 6 years old. Just before winter last year, I decided to get a new factory muffler. I had Acura install it and they were nice enough to unbolt the SuperTrapp. So when spring came around, I just brought the Trapp in to a local shop and had them just bolt it up and had them carefully remove/unbolt the factory muffler. Whats nice is the SuperTrapp with connecting pipe can easily be carried with one hand. Try that with the factory muffler and you will immediately feel the weight savings.

VTECAcuraGSR: If you are ever in the Ohio area, you are more then welcome to check the SuperTrapp out on my car.


[Modified by Astro, 6:05 PM 9/22/2002]

 

Supertrapp makes an end plate with a hole in it for emissions inspection, or just remove all the plates

 

SuperTrapp is the only logical choice for any "muffler". If you find it necessary to run a muffler at all, then SuperTrapp is the only way to go. It's light and is above all tunable according to driving conditions.

For racing purposes, though, you can't beat a straight pipe out the side!

13h4

 

Do you guys use a resonator along with a super trapp or just a straight pipe and super trapp?

 

I'm using straight 2-1/4" pipe to a 17" Trapp muffler. I'm dyno'ing it tomorrow and I plan on doing at least three pulls with a different number of disks each time. I'll post results if anyone's interested.

 

Yes, post results John. I always wanted to do the same thing, but never got around to it.