Lost all backpressure and low end torque
07-06-2011, 06:11 PM
#31
OH yea, I remember. Increased exhaust flow can benefit any engine, however too much of an increase will result in a loss of LOW END torque as the torque curve is moved up in the rpm range. Go google any old hotrod magazine, exhaust catalog, tuning advice, How to Build a Small Block whatever, and you will get the same answer.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
and who reads tech articles on mufflers?! oh yeah trolls...
07-06-2011, 06:14 PM
#32
1st Gear Member
Thread Starter
Join Date: Jun 2011
Location: California
Posts: 86
OH yea, I remember. Increased exhaust flow can benefit any engine, however too much of an increase will result in a loss of LOW END torque as the torque curve is moved up in the rpm range. Go google any old hotrod magazine, exhaust catalog, tuning advice, How to Build a Small Block whatever, and you will get the same answer.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
BUT thanks everyone for all the help.
07-06-2011, 06:15 PM
#33
4th Gear Member
Join Date: Jun 2010
Location: TEXAS
Posts: 1,452
Very good info scotty that goes back to a lot of arguments on this forum on dif exhaustg threads even on the topic of str8 pipes and sm1 threw I'm well top fuel dragsters etc.. which is a silly argument when compairing to street cars. On a differerent forum though a lot of the points you just made were put out on a diff forum I want name but very good info reps to ya.
07-06-2011, 06:17 PM
#34
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
OH yea, I remember. Increased exhaust flow can benefit any engine, however too much of an increase will result in a loss of LOW END torque as the torque curve is moved up in the rpm range. Go google any old hotrod magazine, exhaust catalog, tuning advice, How to Build a Small Block whatever, and you will get the same answer.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
For a STREET car, too much is sometime really too much. You don't go to school or work at 6500 rpm. You need to build torque at 1500 rpm to leave a red light, unless you like tickets. Our OP here simply overshot his "Happy Place", and yes, opinions vary so your happy place might be somewhere else.
This is what I have been trying to tell people for 40 years--decide what sort of peak power band you want and then build/tune for that target. On the street I would gladly pay 25HP peak for 15HP down low where I will actually be using it.
Just because some product says "race" on it does not mean it will help, or even be desirable, on the street--in fact there is a good possibility you'll end up with a car that's a real dog unless you ALWAYS drive it like you just stole it...
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