CAli-Spec Engine
12-12-2001 | 10:07 PM
#1
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CAli-Spec Engine
I was wondering if since I have a Ca-Spec engine if there are any parts in general that are holding back any power. Such as the muffler. I was told that the muffler on the CA-Spec Max robs a bit more power than the fed- spec ones do. Is there any truth to this? Or is there anywhere else that replacing parts with aftermarket or fed spec ones will give me more power?
SuDZ
SuDZ
12-13-2001 | 12:20 AM
#3
Hey Sudz, did you purchase your car in Massachusetts? Cuz I think I have a CA spec Maxima also, and it was bought at Quirk Nissan in Braintree.. I'm just wondering why the hell they were selling those in the northeast... hmm... but I live in Cali now so I guess it all works out..
12-13-2001 | 01:07 AM
#4
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Posts: 2,835
Actually, there has been some confusion regarding a "CA spec" 4th gen.
Apparently the 99 Maximas have the four O2 sensors and the additional precat which requires a different Y-pipe. As far as I know the 95-98's all have similar exhaust arrangements, and on Cattman's site, it says that ALL 95-98's use the YG-4 Y-pipe, whereas the 99 (with the two extra plugs in front of the engine) needs a special pipe.
I purchased my 97 Maxima in California, and it does not have the two extra O2 sensors. I am also unaware of any precat differences between a 97 CA and non CA 97 Maxima. I think that the main difference may be the evaporative emissions system in the CA spec models from 95-98. There may be a difference in type of O2 sensor as well, but not number of sensors. Courtesyparts.com lists a different part number for rear O2 sensors for 95-96 vs 97+ Maxima 4th gens.
Apparently the 99 Maximas have the four O2 sensors and the additional precat which requires a different Y-pipe. As far as I know the 95-98's all have similar exhaust arrangements, and on Cattman's site, it says that ALL 95-98's use the YG-4 Y-pipe, whereas the 99 (with the two extra plugs in front of the engine) needs a special pipe.
I purchased my 97 Maxima in California, and it does not have the two extra O2 sensors. I am also unaware of any precat differences between a 97 CA and non CA 97 Maxima. I think that the main difference may be the evaporative emissions system in the CA spec models from 95-98. There may be a difference in type of O2 sensor as well, but not number of sensors. Courtesyparts.com lists a different part number for rear O2 sensors for 95-96 vs 97+ Maxima 4th gens.
12-13-2001 | 06:23 AM
#5
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Originally posted by spiff56747
Hey Sudz, did you purchase your car in Massachusetts? Cuz I think I have a CA spec Maxima also, and it was bought at Quirk Nissan in Braintree.. I'm just wondering why the hell they were selling those in the northeast... hmm... but I live in Cali now so I guess it all works out..
Hey Sudz, did you purchase your car in Massachusetts? Cuz I think I have a CA spec Maxima also, and it was bought at Quirk Nissan in Braintree.. I'm just wondering why the hell they were selling those in the northeast... hmm... but I live in Cali now so I guess it all works out..
SuDZ
12-13-2001 | 08:08 AM
#6
differences with cali spec are.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
12-13-2001 | 08:38 AM
#7
Joined: Aug 2000
Posts: 6,345
You must have a check engine light on most of the time.
Originally posted by TILLEYS99
differences with cali spec are.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
differences with cali spec are.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
12-13-2001 | 01:48 PM
#10
Senior Member
Joined: Aug 2000
Posts: 2,835
Originally posted by TILLEYS99
differences with cali spec are.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
differences with cali spec are.
1. Lower intake manifold has throttle body like baffles that open and close I guess for emissions.
2. If you get an aftermarket Y pipe you can use a fed. spec. if you change the front manifold and add 2 O2 sensor fittings, otherwise youll still have that heap of crap they call a precat, even if you get the cali spec Y pipe it doesnt eliminate the front precat.
you can change both of these if you can find the parts. Ive changed the lower intake manifold and front exhaust manifold and Im using a fed spec Y pipe with 2 additional O2 fitings on my 99.
I believe that the 99 has different emissions equipment than 95-98. So, we have more than just "CA spec" and "Fed spec" going on here. Like I wrote before, the 99 has two additional O2 sensors that the 95-98 do not have, regardless of whether you purchased in CA or not.
12-13-2001 | 10:29 PM
#11
Originally posted by SuDZ
Oh see I would rather do it if the Check engine light wasnt gonna come on on me. I hate seeing stuff like that. Did you feel much of a difference after you did this though?
SuDZ
Oh see I would rather do it if the Check engine light wasnt gonna come on on me. I hate seeing stuff like that. Did you feel much of a difference after you did this though?
SuDZ
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