Q:
What do you guys think of the Nismo CAT back, does it produce sound better than stock? Also, in combinaton with the JWT charger, would it really bump the HP close to 300?
A:
possibly more than that. Here are some estimates:
STAGE.....Product.................HP gain.....Total HP
Stock car...........................................287
1.............Intake.................12.............299
2.............Exhaust................20............319
3.............Under drive pulley......15...........334
4.............Headers.................10............344
5.............Flywheel & clutch......25.............369
6.............Supercharger kit.......166............508
A:
Where are you getting those numbers from? some of those numbers seem pretty high. Possibly 20hp for a full exaust system, but for a cat back only, I couldn't see an increase of more than 5 -10hp max.
A:
i don't understand how the maufacturers are standing there making their claims of 20HP for exhaust 12HP for intake... but when one of us mounts the same equipment the gains are a mere 5-10HP for exhaust or a measly 2 for intake...
i would just say the best place to start is the UR Underdrive pulleys... and lightweight flywheel... to get your engine response a little quicker... because as most of ou know and i'm not sure if this remains true fore 06 models but the fuel system has trouble with HP gains above 300HP...
am i wrong?
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Chrome Silver '03 Touring -MT-
C.F. Nismo Wing
Shorty Antenna (Stolen!!! Thanks alot!)
Kicker Solo Baric L7 1200w
I don't think, I know...
Well, I don't think you know either
A:
For sure, the numbers represent the absolute top end of what is available. I got these numbers from UltimazeZ's stage chart:
Im sure that you will probably see less than that in reality - but in the spirit of KYOZ33's post.. I would bet that an AM intake and catback would certainly exceed 300 HP at the crank.
A:
I'd look to saving weight on the exhaust, and adding 5-10 crank horsepower, maybe 5-7 at the wheels at most. The intake will be 50% of that probably.
19[TT]91
My TT beauty is gone.
2[00]2 Honda 954RR
Suzuki 1200 S; sportscar eater
19[I4]94 Integra GSR Sedan
Long live the Z...
aka SAHTT
A:
with my UR undrive pulley, nismo cai & cat back i would estimate conservatively i'm pushing 307 hp at the flywheel.
A:
theres no way those numbers are right...mods especially on the Z are not cumulative. Just because an exhaust manufacturer says youll get 20hp and an intake manufacturer says youll get 10hp does not mean your going to get 30hp. Mods work in conjunction with eachother. Not mention most manufacturers are overrated anyways. none of the intakes are going to get you much over 5hp and you'll be lucky to get 10hp from an exhaust. the Nismo exhaust and intake will probably get you right around 300, but not much more.
As far as sound for the Nismo, most people says it sounds kind of like the stock but a little deeper and louder overall. People say it gives a little bit more refined exotic sound.
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03 CS Touring
VIN #189
A:
The computers will defeat any HP increase gain by keanihg the air/fuel ratio. Only unichip + FI wiill gain HP, and maybe a blown engine.
A:
Nismo exhaust was tested by Sport Z magazine with a gain of 6.5 hp and 3+ on the torque. Those hp numbers are completely bogus from ultimatez.
Post Edited (Nov 17, 6:33pm)
A:
well SRL311, you can get hp and better track numbers NA its been proven. It isnt easy on the wallet but it can be done effectively so to say you cant gain any power NA is wrong.
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03 CS Touring
VIN #189
A:
Jim Wolf has dyno proven 8HP+ for their intake and azjimbo is right - about 7HP more for the nismo catback. So thats 15 crank HP and ideally, an intake will work better with an exhaust and vice versa. I agree DrivenZ - the UltimateZ numbers look high, but regardless. Intake + Exhaust = 300+
A:
ummm did anyone notice the 25hp gain from a clutch and flywheel???
i thought all that did was let you use your power better... not give you more. or am i on another planet?
*so spoilers really do add hp!*
'86 300zx N/A (SLOW!)
"All your base are belong to us" - God
Suck. Squeez. Bang. Blow.
A:
Thank you drivenz for the answer. And to all who participated. Thanks!
A:
Most people will say that a lighter crank pulley or flywheel won't give you any more power but it depends on how you look at it. It's less rotational weight so it frees up power going from the crank to the rear wheels. That means that doing those mods won't yeild any more power at the crank but should free up power at the rear wheels. So if for example you have 300hp at the crank and 250 at the wheels and then do those mods you would still have 300hp at the crank but your RWHP should increase to 250+. So in theory a lighter clutch and flywheel would free up some hp at the rear wheels but 25hp is a lot. I would bet it's more like 5 hp from the flywheel/clutch and maybe another 5 or less for the pulley set. As someone mentioned, once you start moving past the 300hp mark the ECU is going to start to run the engine lean at higher rpms. That means that at a point doing more mods will only slow you down UNTIL fuel is adjusted. To my knowledge no one has come out with a computer chip or redone ECU so until then fuel will still be the main bottle neck for gaining power. At least with the FI kits they have fuel kits available. I wonder if any of them could be used in a n/a application or perhaps if a lesser flowing version. I wonder how the new 06 that already has 300hp responds to mods vs the older ones with 287.
1977 280z: Intake, exhaust, high flow cat, header, euro damper, cam, MSD, adj. FPR, 3.7 lsd, F+R sway+strut bars, 2580lbs
1984 300zx: intake, exhuast, high flow cat, headers, JWT ECU, F+R sway bars, F strut bar
06 WRX TR
A:
high dollar to HP gians ratio for NA.
I fantazize about HKS True dual exhast, APS Tallbpoy penunum, Stephens Enginering Headers, but what I have read, minimal to zero HP gains are realized for thousands of dollars.
A:
310? wow! but I've heard Nismo only gains 6HP and 3.5 ft/lbs of torque, and the JWT gains only approx. 6 HP as well, don't know about torque on this one. So that's a total of 12HP and maybe around 5 ft/lbs of torque. So to get 310 HP, what brand of exhaust and intake would do that? thank you in advance
( So far, theoretically speaking with the JWT and Nismo I'd get 299 HP and
279 ft/lbs of torque. Damn! that's bot 1 HP and 1 ft/lbs shy of my target.)
Post Edited (Nov 18, 9:32pm)
A:
With the right tuning/parts there is no reason you wouldn't be able to hit 100+bhp/ltr. This may require more than intake/exhaust though. You'll see tq numbers start to have diminishing returns, but hp can still climb higher. With testpipes and the right FULL exhaust system, least restrictive intake and great tuning, I think you could gain 25bhp easy, and hopefully lose 50 or so lbs in the process, which will also help.
19[TT]91
My TT beauty is gone.
2[00]2 Honda 954RR
Suzuki 1200 S; sportscar eater
19[I4]94 Integra GSR Sedan
Long live the Z...
aka SAHTT
A:
good point, i think the combination of weight and performance is what you really need to take into account with the Z. It isnt exactly a leightweight lightweight wheels, exhaust, seats, flywheel, can be a good investment as well.
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03 CS Touring
VIN #189
A:
Author:
Date: Nov 20, 2005 2:56am
>With the right tuning/parts there is no reason you wouldn't be able to hit 100+bhp/ltr
With cams, reprogramming, etc, sure, you might be able to get it. A car tuned for regular street use isn't going to get this without some major changes. (ie. you won't get this on the 350z with just bolt-ons)
I remember hearing that the Honda S2000 is the only NA car that comes close to 100 hp/L, and it has a particularly high RPM range.