How is a prochamber different from an h-pipe
Thread Starter
Bullitt Member
Joined: December 8, 2006
Posts: 367
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From: Tewksbury, MA
How is a prochamber different from an h-pipe
Its that time of year again, Im looking to change around my exhaust. I tried an O/R x-pipe- It was too raspy and a little too loud for my neighbors. I tried a high flow catted x-pipe- still a little raspy.
I now have a high flow catted (bassani comp cats, as used on hi-flow x-pipe) fitted with the factory h-pipe. It sounds great! Im just curious how a prochamber will sound compared to the h-pipe. What exactly is inside the prochamber? Is it basicly a longated h-pipe, or is it chambered like a muffler? How much quieter will it be over an h-pipe? How much louder will it be with no cats? I dont really want it any quieter than it is now, and I may condsider an O/R prochamber as long as its not too loud or raspy.
I now have a high flow catted (bassani comp cats, as used on hi-flow x-pipe) fitted with the factory h-pipe. It sounds great! Im just curious how a prochamber will sound compared to the h-pipe. What exactly is inside the prochamber? Is it basicly a longated h-pipe, or is it chambered like a muffler? How much quieter will it be over an h-pipe? How much louder will it be with no cats? I dont really want it any quieter than it is now, and I may condsider an O/R prochamber as long as its not too loud or raspy.
Last edited by 69_gt500; Sep 6, 2008 at 09:08 PM.
Thread Starter
Bullitt Member
Joined: December 8, 2006
Posts: 367
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From: Tewksbury, MA
So, deeper than a h-pipe would you say? I may just pull the trigger and get it just to try something different, I already tried an x-pipe and h-pipe, so might as well try all three.
Thread Starter
Bullitt Member
Joined: December 8, 2006
Posts: 367
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From: Tewksbury, MA
LM performance.com seems to have the best price. Im still kinda looking into to it, I dont know yet If im gonna pull the trigger...
SUPERCHARGED RED ROCKET ------------------Master-Moderator
Joined: May 11, 2006
Posts: 10,661
Likes: 2,528
From: Carnegie, PA
Perhaps you'll find this as helpful.
MAC’s patented PRO CHAMBER® has obsoleted the current intermediate systems. Split (one each side) manifolds
or exhaust headers on any engine need to be balanced to each other. On a V-8 motor for example, exhaust pulses enter
respective collectors at uneven intervals of 0-90-180-270 degrees of engine rotation. This process hampers the full
benefit of any exhaust header or manifold system by the long intervals between exhaust pulses, making balancing of
exhaust mandatory for optimum power. Balance tubes between exhaust, on opposite sides, help transfer exhaust
pulses from side to side to smooth out exhaust pulses and flow. This results in more power and broader torque band.
MAC’s PRO CHAMBER™ goes even further than traditional X & H-pipes to produce more torque and horsepower
by merging exhaust pulses into one area. Merging of all exhaust gasses creates higher temperatures which creates a
boost in exhaust velocity and allows exhaust gas to use both outlets.
Your exhaust will think it’s a 180 degree Tuned Header! “Big HP” more than any other intermediate systems!
Chassis Dyno figures on Pro Chamber™ as tested
March 97 issue of 5.0 Mustang magazine.
Rear Wheel Horsepower
RPM 2500 3000 3500 4000 4500 5000
Stock hp 101 125 147 166 170 166
MAC HP 118 153 179 200 212 207
23 rear wheel horsepower average thru RPM range!
MAC’s Pro Chamber™ with stock exhaust manifolds and stock tails!
MAC’s patented PRO CHAMBER® has obsoleted the current intermediate systems. Split (one each side) manifolds
or exhaust headers on any engine need to be balanced to each other. On a V-8 motor for example, exhaust pulses enter
respective collectors at uneven intervals of 0-90-180-270 degrees of engine rotation. This process hampers the full
benefit of any exhaust header or manifold system by the long intervals between exhaust pulses, making balancing of
exhaust mandatory for optimum power. Balance tubes between exhaust, on opposite sides, help transfer exhaust
pulses from side to side to smooth out exhaust pulses and flow. This results in more power and broader torque band.
MAC’s PRO CHAMBER™ goes even further than traditional X & H-pipes to produce more torque and horsepower
by merging exhaust pulses into one area. Merging of all exhaust gasses creates higher temperatures which creates a
boost in exhaust velocity and allows exhaust gas to use both outlets.
Your exhaust will think it’s a 180 degree Tuned Header! “Big HP” more than any other intermediate systems!
Chassis Dyno figures on Pro Chamber™ as tested
March 97 issue of 5.0 Mustang magazine.
Rear Wheel Horsepower
RPM 2500 3000 3500 4000 4500 5000
Stock hp 101 125 147 166 170 166
MAC HP 118 153 179 200 212 207
23 rear wheel horsepower average thru RPM range!
MAC’s Pro Chamber™ with stock exhaust manifolds and stock tails!
Legacy TMS Member
Joined: January 9, 2005
Posts: 6,982
Likes: 6
From: New Carlisle, Ohio (20 miles north of Dayton)
I ran a prochamber for several years. It will make the tone of your exhaust slightly lower and more mellow. However, don't buy into the hp numbers listed above. I had my car on the dyno several times with the prochamber and I can say it is really not worth anything. Just changes the sound of the exhaust.
Scott
Scott
Legacy TMS Member
Joined: January 9, 2007
Posts: 110
Likes: 4
Thread Starter
Bullitt Member
Joined: December 8, 2006
Posts: 367
Likes: 0
From: Tewksbury, MA
I ran a prochamber for several years. It will make the tone of your exhaust slightly lower and more mellow. However, don't buy into the hp numbers listed above. I had my car on the dyno several times with the prochamber and I can say it is really not worth anything. Just changes the sound of the exhaust.
Scott
Scott
GT Member
Joined: August 9, 2007
Posts: 102
Likes: 0
