K&N Air Filter HP Gain 86 300ZX

[Dime10C]

Hello there, I own a 1986 300ZX 2+2 Model Automatic, and am looking into a K&N Cold Air Intake. I was wondering if anyone hear has put this on their Z and had a noticeable HP gain. Thank you in advance.

[evildky]

Welcome to Nico!

a drop in air filter is not noticible at all, and wuld ield only 1-2 hp, a cone air filter will sound more powerful but only yeiled around 5hp

the n/a's aren't as receptive of bolt on mods, the most powerful n/a I've heard of gaines around 30 whp, tats with intake, exhaust, cams, cam gears,ecu, lighweight clutch, underdrive pulley's etc

I know it's not what you want to hear but if you want a fast car, get a 2 seat turbo, it's lighter and more powerful and mroe receptive to mods, a turbo will gain you nearly 100 whp with an intercooler and basic mods

[BadQ45t]

The drop in replacements work well, I have one in my 84' for about 15 years now. They pretty much last forever but you need to service them with this oil stuff, overall not that big of a difference but just a tad more. The cones will make more difference.

The 2+2 was pretty heavy, mine is an NA and I have resolved myself the fact that it will never be fast. I have made it handle nice with Eibach springs, KYB Strut/shocks (not too stiff), thicker sway bars and good tires (YR Rater, not made in the 15" size anymore).

A nice exhaust makes it breath easier, I added an aftermarket all stainless one years ago. It is loud but added probably 5 HP. I would work to make sure the car is tuned up as best it can be, advance the timing a few degrees adds a little power (you need to retard to pass smog). Just getting it running like new and that is probably a good start. If you want to go fast go find a Z32 90-96 Twin Turbo.

[evildky]

If you want to go fast go find a Z32 90-96 Twin Turbo.

sorry chief, I've got more money in the mods for my Z32 with sport 500's etc than I have in cost plus mods of my Z31 and my Z31 is way faster in a straight line or around turns

the Z31 is underappresicated and the Z32 is over appreciated, mostly by people who have never owned a previous model of Z

[TAcroc]

If you are wanting to get some power out of your na z31 U should check out z31performance.com. You can get some insane power out of them and for cheap. I did a turbo swap, manual swap, installed an hx35w turbo, 460cc injectors, z32 maff, walbro fuel pump, an lc-1 wideband bought a Nistune ecu and porsche intercooler. All was pretty cheap. But I have lose intrest in the car and just want an na z32 manual for now...

[BadQ45t]

But the DOHC engine has alot more potential stock or if you got it back into shape so that you get the stock performance with 300 hp the Z32 offers out of the factory than the 200 or 205 that the Z31 gave you out of the factory.

I was not ever a big fan of the Z32 as lots of people were and are, I have a Z31 and love it for the last 25 years...it was the last of the line, wasn't saying you couldn't make it faster, but at car shows and Z events I have seen some 600-700hp monsters, the most HP out of a Z31 I have seen is around 450hp.

I wasn't saying that it isn't possible to make a Z31 faster, but for this guy, if he's going to start over (cause we all know a 2+3 Z31 is never going to be fast) I'd start with the Z32..way easier to find one in reasonable shape too.

[evildky]

But the DOHC engine has alot more potential stock or if you got it back into shape so that you get the stock performance with 300 hp the Z32 offers out of the factory than the 200 or 205 that the Z31 gave you out of the factory.

I was not ever a big fan of the Z32 as lots of people were and are, I have a Z31 and love it for the last 25 years...it was the last of the line, wasn't saying you couldn't make it faster, but at car shows and Z events I have seen some 600-700hp monsters, the most HP out of a Z31 I have seen is around 450hp.

I wasn't saying that it isn't possible to make a Z31 faster, but for this guy, if he's going to start over (cause we all know a 2+3 Z31 is never going to be fast) I'd start with the Z32..way easier to find one in reasonable shape too.

ummm, the DOHC version fo the VG has a large headstart out fo the box, about 60 hp, and short of a custom engine build the best z32 n/a I'm awaye fo makes around 210 hp, there is a guy with a Z31 n/a putting down 220 at the wheel, the dual cam has the advantage of higer compression and a much better intake, and more valves, otherwise not much better than the earlier sungle camand if you don't think a 2+2 can be fast you have a bit to learn, sure it's a bit heavier and therefore a bit slower, so you add a bit more power

[Racinjitter]

Funny. I know of many Z31's making well over 600whp. Hell here is a link to the "fastest 5 speed stock drivetrain z31" http://www.youtube.com/watch?v=6N1w6prXius

Then there is this website, for some of the high hp vg30e(t) engines. http://www.vg30et.com/members.html. SATAN should be making close to 1000 hp this summer though.

Can't forget the guys at WWR though. http://www.youtube.com/watch?v=qub2DpDpvQY http://www.youtube.com/watch?v=4zYabTiOIAE http://www.youtube.com/watch?v=4zYabTiOIAE

Back in the day there were a few z31's in the 7's. I can't seem to find any videos of them though.

[evildky]

someone missed the N/A part fo the discussion......

[Bleach]

Hello there, I own a 1986 300ZX 2+2 Model Automatic, and am looking into a K&N Cold Air Intake. I was wondering if anyone hear has put this on their Z and had a noticeable HP gain. Thank you in advance.

Switching to a 5-speed manual and a 3.9 R200 rear gear would give you a noticeable gain.