Performance differences between Federal and Califoria specs?
#1
Performance differences between Federal and Califoria specs?
Does anyone know of any documented performance differences between the '49 state' Maximas versus the NLEV/California emmission spec cars?
#2
the two main differences I know of are the exhaust and the intake manifold. The front exhaust manifold has a pre-cat built right into it rather than in the y-pipe. Also, the intake manfold has some sort of a swirl control valve or something that is not present on the fed-spec maximas. There are most likely some ECU differences because of this also. In terms of performance, I think someone dyno'd a fed spec and cali spec maxima side by side.... can't recall the results though
#6
..
Originally posted by medicsonic
Don't the 2001+ cars ALL have Cali spec now?
Don't the 2001+ cars ALL have Cali spec now?
So far a couple FED specs have shown around 10ft/lbs. MORE torque than a Cali spec.
The ECUs are also different between the FED/CALI and even the AE.
#7
Re: ..
Originally posted by IceY2K1
Yes.
So far a couple FED specs have shown around 10ft/lbs. MORE torque than a Cali spec.
The ECUs are also different between the FED/CALI and even the AE.
Yes.
So far a couple FED specs have shown around 10ft/lbs. MORE torque than a Cali spec.
The ECUs are also different between the FED/CALI and even the AE.
#8
Re: Re: ..
Originally posted by woosh
I couldn't find the picture but I know I saw it somewhere here before. Someone please correct me if I'm wrong but the visual way to tell if you have cali spec is there are 4 connector plugs at the front of block just behind and a little below the radiator instead of 3? Right?
I couldn't find the picture but I know I saw it somewhere here before. Someone please correct me if I'm wrong but the visual way to tell if you have cali spec is there are 4 connector plugs at the front of block just behind and a little below the radiator instead of 3? Right?
#9
Originally posted by punkdork
I've got one of the last great ones. It's an automagic to be feared. I can even beat kev! Should I start listing "fed-spec" as a performance mod?
I've got one of the last great ones. It's an automagic to be feared. I can even beat kev! Should I start listing "fed-spec" as a performance mod?
#10
Now I take it when I go to get my emissions test done, they are going to take the numbers for a CALI SPEC and not just a wheather i pass the Fed Spec.
Cause if it is just FedSpec numbers they look at, then hell, I am removing some crap.
Cause if it is just FedSpec numbers they look at, then hell, I am removing some crap.
#11
Originally posted by BigDogJonx
Now I take it when I go to get my emissions test done, they are going to take the numbers for a CALI SPEC and not just a wheather i pass the Fed Spec.
Cause if it is just FedSpec numbers they look at, then hell, I am removing some crap.
Now I take it when I go to get my emissions test done, they are going to take the numbers for a CALI SPEC and not just a wheather i pass the Fed Spec.
Cause if it is just FedSpec numbers they look at, then hell, I am removing some crap.
#12
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Re: Performance differences between Federal and Califoria specs?
Originally posted by Galo
Does anyone know of any documented performance differences between the '49 state' Maximas versus the NLEV/California emmission spec cars?
Does anyone know of any documented performance differences between the '49 state' Maximas versus the NLEV/California emmission spec cars?
#13
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Re: ..
Oh? How can you say by my dyno results?
184hp and 193TQ? Thats what I thought
No difference in performance.
184hp and 193TQ? Thats what I thought
No difference in performance.
Originally posted by IceY2K1
Yes.
So far a couple FED specs have shown around 10ft/lbs. MORE torque than a Cali spec.
The ECUs are also different between the FED/CALI and even the AE.
Yes.
So far a couple FED specs have shown around 10ft/lbs. MORE torque than a Cali spec.
The ECUs are also different between the FED/CALI and even the AE.
#14
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Posts: n/a
Re: Re: Re: ..
Originally posted by Max_Gator
Instead of 2.
Instead of 2.
Calif spec, see the 4 connectors?
#15
Re: Re: ..
Originally posted by RussMaxManiac
Oh? How can you say by my dyno results?
184hp and 193TQ? Thats what I thought
No difference in performance.
Oh? How can you say by my dyno results?
184hp and 193TQ? Thats what I thought
No difference in performance.
Several dynos show FED models typically have 10ft/lbs more torque, but not all. It doesn't mean it's a guarantee, since all cars are not created equal.
Yes, there is a difference in performance, but nothing that you'll be able to tell EXCEPT on a dyno.
#16
We dyno tested a 2k5spd Cali spec w/ SI and Y, vs. two stock fed sped 2k 5spd. The Cali with mods dyno'd out at about the same as the two stock fed specs. However, the Cali had more miles AND aftermarket heavier wheels. When re-dyno'd later with lighter wheels, it improved significantly. I'll see if I can find the plot somewhere - but I don't have the re-dyno.
Short of it is that the difference is not that significant and hard to test on a dyno because you can't account for differences between individual cars. I'd think the only way to truly know the difference would be to do a large sample.
If as Russ says he dyno'd at 184/193, that compared to my dyno is 9 hp off stock but 4 above in torque (see my dyno link below).
Short of it is that the difference is not that significant and hard to test on a dyno because you can't account for differences between individual cars. I'd think the only way to truly know the difference would be to do a large sample.
If as Russ says he dyno'd at 184/193, that compared to my dyno is 9 hp off stock but 4 above in torque (see my dyno link below).
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