Replacing Elims with Mufflers?? For speed...?
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 8,107
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From: California
St. Jude Donor '05-'06-'07-'08
Replacing Elims with Mufflers?? For speed...?
OK, I really dig the sound that I am getting with elims, but I am worried about lost horspower/torque. Would it be worth it to switch to some mufflers? If so, what is best for performance? I care more about speed than sound...but I want a good "Chevy Small Block Sound..." Any Thoughts? Thanks in advance.
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Re: Replacing Elims with Mufflers?? For speed...? (Knight Ryder)
I had elims... found the reasonance to be killer... :U
I installed a Corsa catback system... picked up some power, too. 10-15hp over the elims.
they are fantastic. sound great a WOT... and idles sweet... but nice and quiet at speed.
great great product. :cheers: :cheers: :cheers: :cheers:
I installed a Corsa catback system... picked up some power, too. 10-15hp over the elims.
they are fantastic. sound great a WOT... and idles sweet... but nice and quiet at speed.
great great product. :cheers: :cheers: :cheers: :cheers:
Elite Torch Red Member
Joined: Sep 1999
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: Replacing Elims with Mufflers?? For speed...? (Knight Ryder)
I went thru the same thing, with the stock mufflers, I was running 107-108 at the track.
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
Le Mans Master
Joined: Feb 1999
Posts: 5,381
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From: Pineville, Louisiana
Re: Replacing Elims with Mufflers?? For speed...? (Mr Mojo)
I went thru the same thing, with the stock mufflers, I was running 107-108 at the track.
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: Replacing Elims with Mufflers?? For speed...? (CowboyNVette)
I went thru the same thing, with the stock mufflers, I was running 107-108 at the track.
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
But MrMojo we all know your car is not normal ;) :lol:
Did the muff elim gig and could never get a trap speed above 106.
Put the Corsa Cat back and I'm back in the 107 range again.
But MrMojo we all know your car is not normal ;) :lol:
Burning Brakes
Joined: Nov 2000
Posts: 1,117
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From: DFW TX
Re: Replacing Elims with Mufflers?? For speed...? (Knight Ryder)
Me too. I had elims on the 92 and loved the sound, but missed the power.
I found a set of almost new stock mufflers off a 96 LT4 to put back on.
Immediate pick up in power over the elims.
I love the power more than the sound definetly.
I found a set of almost new stock mufflers off a 96 LT4 to put back on.
Immediate pick up in power over the elims.
I love the power more than the sound definetly.
Melting Slicks
Joined: Mar 2000
Posts: 2,225
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From: Georgia
Cruise-In I Veteran
Re: Replacing Elims with Mufflers?? For speed...? (Knight Ryder)
Loved the sound of the Elims but my co-pilot didn't. Installed Corsas ... perfect choice. No resonance, quiet when cruising w/the wife, and really alive at WOT. I think Mojo is right about loss of torque w/the elims but unless you dyno before & after or compare time slips, I'm not sure you can really tell the difference.
btw, if you decide to go with Corsas, the quality and fitment are excellent. I did my own install and it wasn't a difficult job at all.
btw, if you decide to go with Corsas, the quality and fitment are excellent. I did my own install and it wasn't a difficult job at all.
Le Mans Master
Joined: Jan 1999
Posts: 5,135
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From: Long Island NY
Re: Replacing Elims with Mufflers?? For speed...? (tuband)
I did the elims, didn't notice any loss. Picked up 2/10th's at the track, from 13.35 to a 13.15.
The resonance is a little annoying after the past several years. If it's too loud after my new set of mods :D are finished, I'm going to install the corsa.
My new exhaust might be too loud: TPIS Headers, 3" Random Tech Cats, X Pipe, Eliminators...
The resonance is a little annoying after the past several years. If it's too loud after my new set of mods :D are finished, I'm going to install the corsa.
My new exhaust might be too loud: TPIS Headers, 3" Random Tech Cats, X Pipe, Eliminators...
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Re: Replacing Elims with Mufflers?? For speed...? (Knight Ryder)
I'm running the muffler eliminator pipes on my '85, my car seems to run better with them. I don't understand how they're making some of the cars lose performance. The losses you guys are describing, are they on cars with mods or totally stock? I thought replacing restrictive mufflers would enhance performance. Fill me in guys! Am I missing something? :chevy
[Modified by H P Bushrod, 7:12 PM 11/16/2002]
[Modified by H P Bushrod, 7:12 PM 11/16/2002]
Instructor
Joined: May 2001
Posts: 238
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From: Conifer CO
Re: Replacing Elims with Mufflers?? For speed...? (92corvette)
Have nothing more to go on than an experienced seat of the pants, but I did not notice any change when I put the elims on my '95. Don't forget you are also shedding a lot of weight, and the stock cats and resonator should provide more than enough back pressure. I sure see a lot of drag racers that use straight pipes..... :confused:
Pro
Joined: May 2002
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From: Hockessin DE
Re: Replacing Elims with Mufflers?? For speed...? (Colorado Chuck)
When I had stock exhaust, from a stop light, on the street, I could hook with no problem. Now that I installed muffler elims, I can't get traction! I haven't had a chance to hit the track and get any gains, because I broke an exhaust bolt tying to install the front Y-pipe!
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Here's the deal on eliminators. The stock mufflers with teh short piece of pipe you cut off with them weigh 17 lbs each. That's 34 lbs, but the pipes you replace them with weigh in around 20 lbs. So that's only a net loss of 14 lbs.
After talking with several LT1 guru's at the track, it was stated that teh cams in our car were designed to work with some back pressure or something like that. By removing the mufflers and doing nothing else, the combination is no longer optimized.
The little HP you do lose can't be felt just as any small gains from cutting open the airbox can't be felt. It's in your head.
I have hundreds of runs to back up my car.
It's right there in black and white. On a completely stock car, you will lose a little HP.
Now my et's improved to the tune of .10. My best with the full exhaust was 13.07 and my best without was 12.97.
The sound is well worth any small loss.
I may put the Corsa on my '93 and go back to eliminators for my '95.
After talking with several LT1 guru's at the track, it was stated that teh cams in our car were designed to work with some back pressure or something like that. By removing the mufflers and doing nothing else, the combination is no longer optimized.
The little HP you do lose can't be felt just as any small gains from cutting open the airbox can't be felt. It's in your head.
I have hundreds of runs to back up my car.
It's right there in black and white. On a completely stock car, you will lose a little HP.
Now my et's improved to the tune of .10. My best with the full exhaust was 13.07 and my best without was 12.97.
The sound is well worth any small loss.
I may put the Corsa on my '93 and go back to eliminators for my '95.