Hello all, Is anyone running the PI Motorsport mufflers? If so, can you tell me how you like them. I am looking for a setup that is best for low end response. Also, I don't want to wake the dead, just the comatose.
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Which ones are you looking at. They have two, the "Big Throat" and the "Power-Pak"
I have the "Power-Pak" and they have a great sound. They are the largest case muffler I have seen on a Pantera, and control sound much better than the "bullet" style.
I have the "Power-Pak" and they have a great sound. They are the largest case muffler I have seen on a Pantera, and control sound much better than the "bullet" style.
Joe A,
I am running the "Big Throat" mufflers with my 460-powered car. The sound is definitely aggressive, but not crazy obnoxious. I have heavily insulated the cars interior and do not have a radio. I can carry on a conversation with the passenger in an elevated voice. Outside the car you can hear it several blocks away with subdued driving. It sounds about what you would expect from a 550hp engine with large diameter exhaust and minimalist mufflers.
Something to be aware of: The tips do stick out further than stock. I tucked the exhaust as far forward as I could with 2.5" diameter, mandrel bent stainless tube exhaust, routed conventionally. I am not running bumpers, which probably makes them appear to protrude even further out. See the picture, below.
Matt
I am running the "Big Throat" mufflers with my 460-powered car. The sound is definitely aggressive, but not crazy obnoxious. I have heavily insulated the cars interior and do not have a radio. I can carry on a conversation with the passenger in an elevated voice. Outside the car you can hear it several blocks away with subdued driving. It sounds about what you would expect from a 550hp engine with large diameter exhaust and minimalist mufflers.
Something to be aware of: The tips do stick out further than stock. I tucked the exhaust as far forward as I could with 2.5" diameter, mandrel bent stainless tube exhaust, routed conventionally. I am not running bumpers, which probably makes them appear to protrude even further out. See the picture, below.
Matt
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Here is a side view.
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Big Block, Those PI pipes look sweet! Your car looks like mine in your pictures. down to the BFG's But mine is a '73 with the rear bumper. The amount of protrusion out the rear seems like it would be very close to stock. I am running the S. Wilkerson GTS clone exhaust system and I have had some issues with the mufflers. That is why I am looking at other options. Do you know how the PI pipes sound compared to the Hall Big bore? Thanks so much for your help!
Dave, I don't think PI sells the power pack anymore. Just the twin pipe style Big Block has.
Joe A,
PM sent.
John
PM sent.
John
I've heard the PI Motorsport twin glass-pack style mufflers on Jerry's Pantera as he cruised the parking lot at PI Motorsports. The volume was reasonable, I was impressed by the low volume and the nice tone (rumble) the exhaust made. I've not had an opportunity to hear the system when under acceleration.
Its hard to make a comparison to the Hall Big Bore or Mind Train exhaust systems, because those systems are quiet when new, but get louder as time goes on. The glass pack mufflers pack with carbon & oil and become less effective at deadening sound. Its impossible to know if the Big Bore system you're familiar with was a "quiet" one or an older "loud" one. The big bore systems can become pretty darn loud with age.
Its hard to make a comparison to the Hall Big Bore or Mind Train exhaust systems, because those systems are quiet when new, but get louder as time goes on. The glass pack mufflers pack with carbon & oil and become less effective at deadening sound. Its impossible to know if the Big Bore system you're familiar with was a "quiet" one or an older "loud" one. The big bore systems can become pretty darn loud with age.
I also have the PI bullet style pipes. Although my car is a Windsor, you can hear them by going to the Forza Friday youtube video. That might help give you an idea of noise level at idle and with a mild rev.
Don't be put off by pipes that stick out a little more- that may be a GOOD thing! There have been a couple of incidences of melted tail light lenses with upturned pipes and long hard runs at very high speeds. Putting the tips further out or lower down may inject the hot exhaust further out in the rear swirl. Those GTS lenses aren't getting cheaper!
quote:Originally posted by Joe A:
Dave, I don't think PI sells the power pack anymore. Just the twin pipe style Big Block has.
Well the you can Google up: Ractive MT645. That is the muffler that PI sold. Might still be available elsewhere.