HP racing header
April-2nd-2002 | 08:25 PM
#18
1.8L Comin atchya
Joined: Mar 2002
Posts: 192
From: Norfolk VA
well what i was saying is if the HP Racing headers elimates the primary cat (its a two piece so you could put the cat in between the two pieces, right???) i would have to move the cat. Therefore the cat would be down futher. Also, the secondary cat is inside the silencer and we don't need that right??
April-2nd-2002 | 08:58 PM
#19
Protege Enthusiast
Joined: Oct 2001
Posts: 79
Originally posted by 99proES
well what i was saying is if the HP Racing headers elimates the primary cat (its a two piece so you could put the cat in between the two pieces, right???) i would have to move the cat. Therefore the cat would be down futher. Also, the secondary cat is inside the silencer and we don't need that right??
well what i was saying is if the HP Racing headers elimates the primary cat (its a two piece so you could put the cat in between the two pieces, right???) i would have to move the cat. Therefore the cat would be down futher. Also, the secondary cat is inside the silencer and we don't need that right??
April-3rd-2002 | 01:31 PM
#20
Protege Enthusiast
Joined: Mar 2002
Posts: 453
From: Spokane WA
Any pro 2001 or newer has the california exhaust with the prmary and secondary cats. This is so they'll meet that LEV crap. I've been looking for aftermarket exhausts and they all say the same thing. That the only emissions legal replacements are the cat backs that don't eliminate the second cat. And no, you can't put the stock cat in between the 2 parts of a 2 piece header. Not without some serious fabrication.
April-3rd-2002 | 03:27 PM
#21
Protege Enthusiast
Joined: Mar 2002
Posts: 53
From: Fairfax, VA
One piece vs. two piece headers...
It seems that the two pieces are basically like a DC Sports header or any other two piece header where the first half o f the header (4 tubes) then hit a flange and go into two tubes where the 2nd piece then runs from that flange to 1 tube where it terminates to the cat. I checked out our stock header the the primary cat is incorportated into the stock header. Yeah, it seems the sensor isse would be a problem depending on if HP Racing incorporates a sensor bung in the header. With my past experiences with headers on a Honda and Miata, stainless steel was always more expensive. Yes, cermaic coated does however have more performance value, but it's not as pretty and time consuming to make.
April-3rd-2002 | 04:19 PM
#22
Protege God
Joined: Sep 2001
Posts: 1,525
From: Evanston, IL
Maybe, the 1.8L FP and 2.0L FS are almost identical other than a 9mm crank throw difference. However they use different transaxles. I've noticed that the position of the engines in the engine bay is slightly different. That's why AEM has different intakes for the two engines, BTW. It's not much more than an inch or two, but could change where the exhaust mates to the header slightly. Yes, you would need to retain both O2 sensors to prevent a constant check engine light, and one would need to be before, and one after, the catalytic convertor.
Originally posted by 99proES
first of all will the 2.0L header fit on the 1.8?
also if you get a hi-flow cat after the header, would you just cut and splice wires so that the O2 sensors reach??
first of all will the 2.0L header fit on the 1.8?
also if you get a hi-flow cat after the header, would you just cut and splice wires so that the O2 sensors reach??
April-3rd-2002 | 04:42 PM
#24
Protege God
Joined: Sep 2001
Posts: 1,525
From: Evanston, IL
No, the purpose for two piece headers is to make them easier to package and ship. The piping diameter is tuned for the application, and is the same diameter on either side of the flanges that join the two halves of the header. You would ruin the performance of the header by putting anything between the two halves. Not to mention anything the length of a cat would extend the bottom half of the header down to the ground.
Some Proteges have a secondary catalytic convertor while other have a resonator in the same area. A catalytic convertor is not contained inside a resonator (silencer), or muffler.
Some Proteges have a secondary catalytic convertor while other have a resonator in the same area. A catalytic convertor is not contained inside a resonator (silencer), or muffler.
Originally posted by 99proES
well what i was saying is if the HP Racing headers elimates the primary cat (its a two piece so you could put the cat in between the two pieces, right???) i would have to move the cat. Therefore the cat would be down futher. Also, the secondary cat is inside the silencer and we don't need that right??
well what i was saying is if the HP Racing headers elimates the primary cat (its a two piece so you could put the cat in between the two pieces, right???) i would have to move the cat. Therefore the cat would be down futher. Also, the secondary cat is inside the silencer and we don't need that right??
header
April-4th-2002 | 06:10 PM
#28
Juggalo
Joined: Jan 2002
Posts: 763
April-8th-2002 | 10:20 PM
#29
1.8L Comin atchya
Joined: Mar 2002
Posts: 192
From: Norfolk VA
Re: header
Originally posted by protege2L
nopi has a header f or $173.79 4 in to 1 design. its polished and sounds good. There is a ceramic coated one for like $230, but sounds good. just thought i would share.
nopi has a header f or $173.79 4 in to 1 design. its polished and sounds good. There is a ceramic coated one for like $230, but sounds good. just thought i would share.
