[Matt M240Z]

Hey, I have an opel gt with a performance but streetable cam, large valves, large pistons, good compression, and a weber downdraft. It chops at an idle and comes on very strong at around 2.5 or 3000 rpm. Does anyone have a suggestion on a good universal muffler? I already know what tips I want to use, but i'd like to see what people recommend that sounds pretty good on a performance opel.

 

[72 Opel GT]

Magnaflow? they sound pretty good nice and low

 

[Excelsior]

I second the magnaflow!

http://www.ddz.net/excelsior/74manta_magnaflow.mp3

This was from about 10' away towards the drivers side of the car.

Of course different cam and header will make a slightly throatier sound I think.

 

[soybean (R.I.P.)]

Sounded good Excelsior. What Magnaflow muffler/resonator would you reccomend? Thanks, Jarrell

 

[Wolf Spyder]

Mine's all stock with a cherrybomb only and sounds great, especially around 3K. It's also got a nice burble on down shift.

I guess it all depends on what you want to hear, smooth anf quiet or somewhat throaty.

 

[Excelsior]

Sounded good Excelsior. What Magnaflow muffler/resonator would you reccomend? Thanks, Jarrell

Since my car is a Manta, the choice would be slightly different I think. RallyBob should speak up here.

 

[BQS4]

I did the same on my GT as I did on my Sportwagon (will also work for the Manta) the only variation is the tail section to make fit the GT. But, it's the exhaust manifold, headpipe, MIDAS turbo muffler, custom over the axle pipe, and in the GT case, a "U" pipe to match the openings in the rear w/chrome pencil tips. As for the Wagon, a ebay bought ANSA twin chrome tip, both sound REAL good!

 

[Matt M240Z]

do any of you know of a muffler that sounds more like one of the hondas? I know its kind of asking for the impossible since its completely different engineering, but i do like the way some of them sound.

 

[GoinManta]

do any of you know of a muffler that sounds more like one of the hondas? I know its kind of asking for the impossible since its completely different engineering, but i do like the way some of them sound.

Ah.. no...

 

[jerseyopel]

muffler

Yes, but its ON a honda!!

 

[Crusher]

exhaust down-pipes

I heard that by extending the two exhaust down-pipes to about the middle of the tranny, then merge them into one 2 - 2.25" improves scavenging....
Any first hand experience ?

 

[bear]

Crusher, RallyBob has done extensive dyno testing on the exhaust systems for the 1.9 and larger Opel engines. This may sound trite, and like a recording, but use the search engine. All the info is there. Almost all the folks here have asked Bob at one time or another for info regarding all aspects of getting the most power from the engines and he has done an outstanding job of letting his expertise be used/known for the good of the Opel community. There are others on this site that have extensive knowledge in other areas as well as some real die hard racers that added to the knowledge pool of this site. Not that we don't mind the questions, it's just that after so long of hearing the same ones, over and over, it's gets to be redundant.

 

[Crusher]

exhausted

I did do a search ... I finally just started searching the web and found allot of info.......I just need to learn to be more persistant in my searches.
If you say its posted here on Opelgt.com, then it must be here.
But I think I found what I was looking for.

thanx

 

[soybean (R.I.P.)]

Crusher, here's one if you haven't already seen it. http://www.opelgt.com/forums/showthread.php?t=5264 and a couple more http://www.opelgt.com/forums/showthread.php?t=5382
http://www.opelgt.com/forums/showthread.php?t=4797
Hth to get you started in the right area, Jarrell