MY JBA exhaust setup, questions left, lessons
Posted: Sat Sep 28, 2019 1:19 am
Thought process:
HP>quiet/loud>cost
I bought JBA SS headers and catted conn pipes. Told the shop i wanted an H pipe and later cutouts.
Solo said a full setup: kooks headers, solo catted conn pipes, balanced (or shorty) was 2205.
JBA headers, catted conn pipes were 1185.
Weld in 2.25 cutouts were on sale for 133, 267 for 2.
Install price was 540, good place to start why
•1st lesson/headers:
They spent a few days getting the headers on. I was going to ask if the kooks install was easier. They ruined the oil dip tube getting it off and with GM on strike... they had to get an after market pce, so i missed 2 races. Not that i care now, but id ask if Kooks are easier to get on.
•My visit / catted conn pipe:
I opted for catts b.c of back pressure, hp.
They had the headers on when i dropped the cutouts off. Fit REALLY good! They held the catted conn pipes up to the headers and it stopped just before the resonator. Im running DoD for as long as i can, so i skipped the H pipe and asked them to leave it. Later a friend in automotive engineering said the resonator was basically an H pipe and i wouldnt gain much by having it replaced for an H pipe, so it made the decision permanent to keep it.
•Mufflers
I gave them the cutouts:
The mufflers are split! Looked like the kooks mid pipe bolts to our mufflers, so that was questioning. The facebook group seemed split on if these mufflers rob power too. 1 guys said, "could gain 2, could gain 20" by eliminating them Solo mufflers are like 480 and 2 cutouts are like 320 so it made it easy.
I told them i thought that 1 guy (Zeos from youtube) had cutouts in the ANGLE before it bends for the muffler flange. It seemed like the best spot, still get back pressure from cats, resonator acting like an h pipe, and had most room. B.c they were downward facing, clearance was a concern clarence, and he said it was a bad idea. So he gave the car back
If you read thru this wall of text and are using a cutout, reply with where and what please and thank you!!
•Mid pipe:
I read Camaro5 guys dont gain by swapping mid pipes. Theirs are also 2.25. Other guys have said that dont think by just going to 2.5 is going to gain hp on here too. So i dont think the 2.25 / 2.50 matters.
• Initial sound
Holy crap it was quiet!! I could hear the exhaust in the resonator in 8 & 4cyl mode was modes, but the windows down at 25, lol i could hear rocks under the tires! I swear it was quieter than when i bought it. 55 was tbe same. No highway test b.c my car runs wierd in 4cyl mode with my cai. It didnt sound good, or like a v8 till 5k. I work at night and most my drive is at night, so it was perfect for me then.
•No mufflers
I race tomorrow and have no interest in losing 2 or 20 hp thru the mufflers after having headers on it! Soo, i took the mufflers off lol sounds tough, not straight pipe 350 like thank god!!!! I can hear some drone in both cyl modes though. Its quiet enough to here i could roll with it, but i dont want it this way permanenty.
Ill post ET gains here and on my general info thread of my gains
HP>quiet/loud>cost
I bought JBA SS headers and catted conn pipes. Told the shop i wanted an H pipe and later cutouts.
Solo said a full setup: kooks headers, solo catted conn pipes, balanced (or shorty) was 2205.
JBA headers, catted conn pipes were 1185.
Weld in 2.25 cutouts were on sale for 133, 267 for 2.
Install price was 540, good place to start why
•1st lesson/headers:
They spent a few days getting the headers on. I was going to ask if the kooks install was easier. They ruined the oil dip tube getting it off and with GM on strike... they had to get an after market pce, so i missed 2 races. Not that i care now, but id ask if Kooks are easier to get on.
•My visit / catted conn pipe:
I opted for catts b.c of back pressure, hp.
They had the headers on when i dropped the cutouts off. Fit REALLY good! They held the catted conn pipes up to the headers and it stopped just before the resonator. Im running DoD for as long as i can, so i skipped the H pipe and asked them to leave it. Later a friend in automotive engineering said the resonator was basically an H pipe and i wouldnt gain much by having it replaced for an H pipe, so it made the decision permanent to keep it.
•Mufflers
I gave them the cutouts:
The mufflers are split! Looked like the kooks mid pipe bolts to our mufflers, so that was questioning. The facebook group seemed split on if these mufflers rob power too. 1 guys said, "could gain 2, could gain 20" by eliminating them Solo mufflers are like 480 and 2 cutouts are like 320 so it made it easy.
I told them i thought that 1 guy (Zeos from youtube) had cutouts in the ANGLE before it bends for the muffler flange. It seemed like the best spot, still get back pressure from cats, resonator acting like an h pipe, and had most room. B.c they were downward facing, clearance was a concern clarence, and he said it was a bad idea. So he gave the car back
If you read thru this wall of text and are using a cutout, reply with where and what please and thank you!!
•Mid pipe:
I read Camaro5 guys dont gain by swapping mid pipes. Theirs are also 2.25. Other guys have said that dont think by just going to 2.5 is going to gain hp on here too. So i dont think the 2.25 / 2.50 matters.
• Initial sound
Holy crap it was quiet!! I could hear the exhaust in the resonator in 8 & 4cyl mode was modes, but the windows down at 25, lol i could hear rocks under the tires! I swear it was quieter than when i bought it. 55 was tbe same. No highway test b.c my car runs wierd in 4cyl mode with my cai. It didnt sound good, or like a v8 till 5k. I work at night and most my drive is at night, so it was perfect for me then.
•No mufflers
I race tomorrow and have no interest in losing 2 or 20 hp thru the mufflers after having headers on it! Soo, i took the mufflers off lol sounds tough, not straight pipe 350 like thank god!!!! I can hear some drone in both cyl modes though. Its quiet enough to here i could roll with it, but i dont want it this way permanenty.
Ill post ET gains here and on my general info thread of my gains