DC sport, A'PEXi WS catback - dyno #s inside
Thread Starter
Junior Member
Joined: Nov 2002
Posts: 29
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From: Baton Rouge, LA
DC sport, A'PEXi WS catback - dyno #s inside
I just installed a DC sport cermamic coated header, A'PEXi WS catback, and gutted the factory cat this weekend. I went from a complete factory exhaust to this setup in a matter of 2hours. I really like the way the car sounds now. It is not much louder than stock driving around and it's very quiet at WOT. This is how an import should sound. 
I pulled the car off the lift and strapped it to the dyno to see what I picked up. Here were the results:
http://members.cox.net/kcr19/accord_exhaust.jpg
I picked up 13hp in some spots in the midrange! You can definitely feel the difference on the street.
I then sprayed a 65 shot to see how it liked the new exhaust. I previously dynoed 154/188 with the stock exh/65shot. With just the exhaust changes, it pulled 172/205! Nitrous loves a free-flowing exhaust. 
I'll post that graph tomorrow. The car was running pig rich on the spray, which is safe, but not conducive for making the most power. So, I swapped in the 75n20 jet, and left the fuel jet alone. Peak #s didn't change much, but I picked up 10hp/tq in the midrange. Final#s were 172/210. Here is the dyno graph:
http://members.cox.net/kcr19/accord_n20_exhaust.jpg
All in all, I'm very pleased! I'm through modding the F22A (except for larger doses of nitrous) An H22A motor will be here in about a month, so I'll give the old F22A hell until then. 160k miles and still going strong.....
Jason
I pulled the car off the lift and strapped it to the dyno to see what I picked up. Here were the results:
http://members.cox.net/kcr19/accord_exhaust.jpg
I picked up 13hp in some spots in the midrange! You can definitely feel the difference on the street.
I then sprayed a 65 shot to see how it liked the new exhaust. I previously dynoed 154/188 with the stock exh/65shot. With just the exhaust changes, it pulled 172/205!
Nitrous loves a free-flowing exhaust. I'll post that graph tomorrow. The car was running pig rich on the spray, which is safe, but not conducive for making the most power. So, I swapped in the 75n20 jet, and left the fuel jet alone. Peak #s didn't change much, but I picked up 10hp/tq in the midrange. Final#s were 172/210. Here is the dyno graph:http://members.cox.net/kcr19/accord_n20_exhaust.jpg
All in all, I'm very pleased! I'm through modding the F22A (except for larger doses of nitrous)
An H22A motor will be here in about a month, so I'll give the old F22A hell until then. 160k miles and still going strong.....Jason
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Joined: Aug 2002
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Um, if you're doing a H22 swap in about a month, why did you install these parts? Were they on a loan or are you selling them after a month? It kind of seems illogical to do a swap after a month for spending $500+ in mods for your current engine.
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Originally posted by showgunz
Um, if you're doing a H22 swap in about a month, why did you install these parts? Were they on a loan or are you selling them after a month? It kind of seems illogical to do a swap after a month for spending $500+ in mods for your current engine.
Um, if you're doing a H22 swap in about a month, why did you install these parts? Were they on a loan or are you selling them after a month? It kind of seems illogical to do a swap after a month for spending $500+ in mods for your current engine.
Thread Starter
Junior Member
Joined: Nov 2002
Posts: 29
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From: Baton Rouge, LA
The catback will work fine with the H22A swap. I will upgrade to the Prelude DC sport header when I install the motor. (I heard the pipe diameter on the header was slightly larger; if it isn't, I'll stick with my current header). It's only money. 
Plus, I wanted to see what the F22 would do with a complete exhaust system, header to catback. As I said, I was pleased with the results.
Jason
Plus, I wanted to see what the F22 would do with a complete exhaust system, header to catback. As I said, I was pleased with the results.Jason
Former H22 Accord Owner
Joined: Mar 2002
Posts: 1,839
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From: NH
Originally posted by TheBlurr
The catback will work fine with the H22A swap. I will upgrade to the Prelude DC sport header when I install the motor. (I heard the pipe diameter on the header was slightly larger; if it isn't, I'll stick with my current header). It's only money. Plus, I wanted to see what the F22 would do with a complete exhaust system, header to catback. As I said, I was pleased with the results.
Jason
The catback will work fine with the H22A swap. I will upgrade to the Prelude DC sport header when I install the motor. (I heard the pipe diameter on the header was slightly larger; if it isn't, I'll stick with my current header). It's only money.
Plus, I wanted to see what the F22 would do with a complete exhaust system, header to catback. As I said, I was pleased with the results.Jason
Former H22 Accord Owner
Joined: Mar 2002
Posts: 1,839
Likes: 0
From: NH
Originally posted by BustedLX
I don't know if the F22's header will bolt to an H22 but it will to an H23. The H23's aftermarket headers have a slightly larger collector which helps the engine operate better at higher RPM's.
I don't know if the F22's header will bolt to an H22 but it will to an H23. The H23's aftermarket headers have a slightly larger collector which helps the engine operate better at higher RPM's.
if the h23/h22 header was interchangeable then the greddy 92-96 lude VTEC header would be listed to fit the h23, but it's not.
