- Fri Aug 13, 2010 1:12 am
#208737
Oh ok well i will take what both of you have said and build my motor through that. Now for exhaust should i get 2.25" or a 2.5"?
- Fri Aug 13, 2010 1:13 am
#208738
Oh ok well i will take what both of you have said and build my motor through that. Now for exhaust should i get 2.25" or a 2.5"?
- Fri Aug 13, 2010 5:01 am
#208777
at least a 2.5"
1986 Nissan 300zx
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
- Fri Aug 13, 2010 5:17 am
#208783
O ok because some guy was telling me 2.25" for torque and 2.5" for horsepower.
- Fri Aug 13, 2010 5:19 pm
#208835
hp comes from torque.
hp = (torque * RPM) / 5250
hp = (torque * RPM) / 5250
1986 Nissan 300zx
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
- Fri Aug 13, 2010 8:30 pm
#208852
Yeah that makes sense. Well he was talking about back pressure.
- Fri Aug 13, 2010 11:14 pm
#208873
The difference in back pressure between 2.25 and 2.5 is minimal. You're adding an inch in diameter to your stock tubing. Back pressure is no longer a topic of discussion.
I'm running 2.5" from the header collector back. Good times are had since ditching the stock exhaust.
I'm running 2.5" from the header collector back. Good times are had since ditching the stock exhaust.
Hi, I'm John. I'm a hacky sackin', rock climbin', scuba divin', aircraft mechanic.
- Sat Aug 14, 2010 12:51 am
#208878
Haha nice. Well why do company make a full exhaust when all it is is piping. There isn't a differnce between a 200 dollar exhaust system and a 1100 dollar Mugen exhaust is there?
- Sat Aug 14, 2010 5:07 am
#208900
R and D in the Cat backs.
The bolt on systems are usually 60mm. with is 2.36 inches. you will get some power, but a custom mandrel system for you car for your motor will make more, but it will cost more to get. a generic muffler shop fabbing up one wont make as much power.
The bolt on systems are usually 60mm. with is 2.36 inches. you will get some power, but a custom mandrel system for you car for your motor will make more, but it will cost more to get. a generic muffler shop fabbing up one wont make as much power.
1986 Nissan 300zx
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
- Sat Aug 14, 2010 6:24 am
#208911
Oh ok. Im not trying to jump off topic but how do you know all of this? Lol
- Sat Aug 14, 2010 6:14 pm
#208945
years of learning. Ive been doing this for 12+ years.
1986 Nissan 300zx
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
- Sat Aug 14, 2010 6:43 pm
#208953
Oh damn so im guessing you are a mechanic?
- Sat Aug 14, 2010 9:43 pm
#208963
Not really. I was for a bit, but Im not anymore. I like messing with cars to be my hobby, not job.
1986 Nissan 300zx
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
1980 Kawasaki KZ650
2014 Kawasaki Ninja 300
- Mon Aug 16, 2010 5:33 am
#209101
My question is why does the bolt on make more power than a exhaust fab shop? If the bolt on kit is 60mm why would that make more power than the 60mm piping the muffledr shop welded for me. Its the same thing. I mean stainless steel piping can't increase hp noticibly over regular exhaust steel, that would be like saying that my falken 195/50r15 tires make my car faster than kuhmo 195/50r15 tires