Nismo Sentra???

[Coreykrhn]

I am thinking about getting nismo cam shafts, nismo cold air intake, nismo exhaust, and nismo header with the cat. is that a good idea and if so how much of a power gain would i get

[RED_DET]

25-30whp.

[D3stro]

The Nismo header with pre-cat is a wrong idea. It's way too much expensive. Just get the Nismo header without pre-cat, you'll still have a cat on the mid-pipe. Seriously, did anyone actually heard someone who bought the Nismo header with cat?

[nametakennow]

The NISMO header, exhaust, and intake are all overpriced considering they make the same gains as any other part.

The precat-equipped one will mean no fiddling to pass emissions, but that's really not hard anyway.

[Coreykrhn]

what would be the best header to get for teh spec-v

[nametakennow]

Best is relative.

OBX, SSAutochrome offer the best bang for your buck.

NISMO means Nissan won't gripe as much if you come in to the dealer with a problem, but you pay for it.

Power wise they're all in the same range.

[VMPhil]

Best is relative.

OBX, SSAutochrome offer the best bang for your buck.

NISMO means Nissan won't gripe as much if you come in to the dealer with a problem, but you pay for it.

Power wise they're all in the same range.

Co-signed. The Nismo offers no power gains over other brands. Infact the Nismo WITH the precat can still be detrimental to the engine and offers less power with the congestive precat in place.

Nismo cam shafts 8-10hp (depending on other mods)Header w/o cat about 7 with id say about 5Nismo cai rouchly 3-4Nismo exhaust about 5.so your set up the best you could see is roughly 24 (depending on sea level ambient temp. etc.)

[D3stro]

And maybe in final after all the mod VMphil wrote, get an Apexi SAFC NEO and get it tuned. You should get some decent horsepower with the mod you'll have by now and by correcting the A/F ratio of B15 SpecV 2002-03 which are way too lean at low rpm and too rich at high.

[nametakennow]

If it was "too lean" at low RPM the car could sputter and, in extreme cases, might even stall.

At low RPM and low throttle, A/F ratio can be quite lean, depending on the engine and what mods it has on it. From the factory most cars are tuned to be this way to reduce fuel consumption.

At high RPM and high throttle manufacturers build in a fairly large "safe zone" of richness to avoid any detonation.

What people don't get is that a comparably (to stock at high throttle) "lean" mixture is a good thing in terms of power AND fuel efficiency because it leads to more complete combustion in the chamber. A mixture that's too rich means that you waste fuel and make less power, too lean you get detonation and destroy your engine. Manufacturers put in the safe zone to provide for the longevity of the vehicle, which in their business makes sense.

That said, an SAFC tune would pull a few more ponies out of the engine by allowing you to lean out the upper RPM fuel mixture, just avoid detonation. My guess is 5-10whp or so, I know someone's tested this and I don't remember their results off the top of my head. However, tuning doesn't provide the same benefits across the board. Engines with few or no mods will only see a couple hp with tuning. This has to do with the mods themselves changing the ECU's adjustments to the data from the sensors.

In basic terms - When you tune, you undo some of the adjusting the ECU has made for change in intake/fuel characteristics and take advantage of more of what the mods do. This is especially true of more involved mods like cams. Even I/H/E isn't cause for dropping $200+ on an SAFC, as the gains from it aren't much because the mods have changed very little about how efficient the engine can be.

[Coreykrhn]

Which do you prefer the 4-2-1 dc header 2 piece http://www.360tuners.com/index...=3737

or the single piece http://www.erzperformance.com/...=DC59

[nametakennow]

2 piece is going to be easier to install, it'll also be easier to "adjust" the fitment. Power loss from having the extra piece is probably so miniscule that you won't even notice. If you can jack the car high enough to put the header in from the bottom, then the install is essentially the same, though you'll need to have someone go back up top to tighten it in. I suppose if you took out the radiator fans you might manage to squeeze it in from the top, but that's more trouble than it's worth, IMO.

The ground clearance factor mentioned on the site shouldn't be an issue. You'll tear off your bumper before you smash your midpipe. Heck, you'll destroy your lower oil pan by then too, so the header/midpipe is the least of your worries.

I'm not a fan of ceramic-coated header styles. They're prone to having the coating crack and allowing the mild steel underneath to rust. Stainless steel, if you can find it, is the better material.

[Murdered_T]

Nismo's parts are made from other companies. Nismo just stamps their name on them.