Cats
Thread Starter
Joined: Mar 2011
Posts: 5
From: Louisiana
I'm not talking about the strip. I'm just saying that in daily driving most people just do it for sound. Not to mention the OP doesn't sound like the sharpest tool in the shed saying he drives his car "all out" on the streets. I'm sorry, but I'd rather not have people driving like they are at a track around me. You get out all alone on a country road, you go for it, but when other people are around...that's just stupid.
3rd Gear Member
Joined: Jul 2006
Posts: 880
From:
Very nice find indeed Mishri!
found a dynosheet:
it's a power gain throughout the entire RPM range, no loss. the header test was from JPC's 2,000 headers... i wont be getting those anytime soon, but seems to be a bigger gain than others reported.
edit: actually, its powerloss vs a catback (rarely done on these cars) up to 6300rpm, but a gain over intake+tune only. what i find very surprising is the axleback showed around a 5whp gain, didn't think you'd get any out of that (muffler only)
and teh guy said he wants to do this for drag strip racing.. so yes, he should see about a .2 gain off of throwing an off-road midpipe on there.
it's a power gain throughout the entire RPM range, no loss. the header test was from JPC's 2,000 headers... i wont be getting those anytime soon, but seems to be a bigger gain than others reported.
edit: actually, its powerloss vs a catback (rarely done on these cars) up to 6300rpm, but a gain over intake+tune only. what i find very surprising is the axleback showed around a 5whp gain, didn't think you'd get any out of that (muffler only)
and teh guy said he wants to do this for drag strip racing.. so yes, he should see about a .2 gain off of throwing an off-road midpipe on there.
5th Gear Member
Joined: Oct 2007
Posts: 2,217
From: NC
Is is an interesting dyno sheet.
As far as that little explosion up there...I'm not even going to respond to that. It's funny to me that people question the younger generations and how they are ever going to fare in society when there are people like this (41 years old?) in current adult stature. We'll be just fine. Lack of intelligence isn't limited by age or any other classification, that's for sure.
And shark tales, if you want, click on the "Carolina MF'er" banner in my profile, and add your information in the members list thread. It's basically a regional forum that will help you learn about events and other members on the forum in NC/SC.
As far as that little explosion up there...I'm not even going to respond to that. It's funny to me that people question the younger generations and how they are ever going to fare in society when there are people like this (41 years old?) in current adult stature. We'll be just fine. Lack of intelligence isn't limited by age or any other classification, that's for sure.
And shark tales, if you want, click on the "Carolina MF'er" banner in my profile, and add your information in the members list thread. It's basically a regional forum that will help you learn about events and other members on the forum in NC/SC.
4th Gear Member
Joined: Dec 2007
Posts: 1,599
From:
You don't need back pressure to make torque. Back pressure is the enemy of power. The only time people lose torque is if they change runner lengths. Longer runner lengths are most efficient at scavenging at higher rpms, and therefore the HP increase. However, if you make the runners too long, you may see a torque decrease as well. If you only take the cats off and don't change any other part of the exhaust system, you will gain HP and torque. Please don't keep spreading the false information about back pressure being required to make torque. If you understand physics or any part of engineering, you would understand that back pressure only reduces efficiency and a reduction in efficiency is a reduction in torque which then calculates to horsepower at a given engine speed.
Thread Starter
Joined: Mar 2011
Posts: 5
From: Louisiana
You don't need back pressure to make torque. Back pressure is the enemy of power. The only time people lose torque is if they change runner lengths. Longer runner lengths are most efficient at scavenging at higher rpms, and therefore the HP increase. However, if you make the runners too long, you may see a torque decrease as well. If you only take the cats off and don't change any other part of the exhaust system, you will gain HP and torque. Please don't keep spreading the false information about back pressure being required to make torque. If you understand physics or any part of engineering, you would understand that back pressure only reduces efficiency and a reduction in efficiency is a reduction in torque which then calculates to horsepower at a given engine speed.
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