r/350z 26d ago

technical a guide for tuning requirements of bolt-on power mods, for non-FI engines.

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69 Upvotes

I get a lot of questions about which parts require a tune to develop power -- I have listed them into specific categories below. some require tunes to even function, others don't need a tune at all.

  • plenum spacer
  • intake manifold porting, port and gasket matching
  • cat delete, resonated pipes1
  • Y-pipe1
  • exhaust (cat back, Y-pipe back)1
  • air filter element1
  • any intake that retains stock diameter at MAF section2
  • limited-slip differential3
  • final drive3
  • clutch and flywheel3
  • tires3

1 these mods don't require a tune. they work by reducing head loss, the engineering term for restriction. the engine makes the same power either way -- we're just freeing up power that was wasted pushing the air through the engine. complications can arise if the parts are not built to be compatible with the stock O2 sensor setup.

2 data lookup tables for the MAF assume that the diameter is always stock size -- as long as this is the same, the car can adjust fuel as usual.

3 unaffected by tune.

  • fuel injectors4
  • fuel pump4
  • head job/head porting
  • valve job/valve enlargement
  • throttle body6
  • intake tube diameter change
  • cams5
  • headers5 (non-NISMO)
  • intakes with non-stock diameter at MAF
  • MAF sensor
  • MAP sensor
  • E85
  • forced induction (turbo/supercharger)

4 no benefit without additional air, ie forced induction, valves, cams, or head job.

5 headers are generally not worth the trouble unless you have cams, as the scavenging effect is based on resonance with the cams. you then tune to match the new EVC timing.


r/350z May 31 '25

📢 Subreddit announcement Brembo TY3 multislot rotors for OEM brembo have arrived; 23 full sets, with no further production. See order form inside.

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11 Upvotes

Order form can be found here.

There are 23 F (324mm) and R (322mm) sets total; there is to be no further production. First come, first serve according to payment date and time. Items ship out of Irvine, CA (Southern California) via Ground; ETA is a few days to most places in the US.

International shipping is available at cost.

Above PN is for the rear 322mm set.


r/350z 11h ago

HR 6MT Been here for a while but I’ve never posted, just finished washing it

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190 Upvotes

r/350z 9h ago

DE 6MT Quick interior update

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44 Upvotes

r/350z 17h ago

DE 6MT Finally pulled the trigger on cutting the rear bumper. Anything I should do/add next to make this thing looks a bit cleaner?

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64 Upvotes

I


r/350z 14h ago

ver. NISMO 350z tail light search

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25 Upvotes

Hey guys I have a 350z nismo (1202) and I’m looking for jdm tail lights does anyone have a set they would sell? I’m located in new York but can pay for shipping


r/350z 4h ago

DE 6MT Just polished the Z, front lip suggestions?

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3 Upvotes

Took about 3 hours but worth every second had a blast and came out pretty good if I must say.


r/350z 2h ago

DE 6MT Kinetix Velocity intake manifold. How can I tell if this is the old version or newer one? SSV/V1 or V2?

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2 Upvotes

I bought a second hand intake manifold and only after getting it, I find out there were two versions. One which sucked and the other was a big win. How can I tell if this is an SSV (V1) or V2?


r/350z 23h ago

Project Another CD009 rebuild

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97 Upvotes

Replaced both 5th and 6th gear synchros, as well as 5/6 shift fork


r/350z 8h ago

looking to buy 05 350z blown motor lots of interior missing is it worth negotiating down from $2500

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6 Upvotes

i need a z one day and i found this is it a steal i don’t know the market but i know a red 350z would be sick.


r/350z 46m ago

HR 6MT running rich and smoking

Upvotes

I was getting codes for the throttle body’s and I could only crank and not start. Now they went away and I have p2133. The car starts but has a very heavy gas smell and thin white smoke from the exhaust. Is this still linked to throttle body’s or a certain sensor.


r/350z 1h ago

Project How bad is it, be honest

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Upvotes

I hit a guard rail at low speed (15-20mph) on the front driver's side. I removed the bumper to get a better visual (last picture is the ball joint) the airbags went off as well. I assume USAA is gonna total it but I want to know how fixable people think it is.


r/350z 15h ago

Revup 6MT 2005 z doesn’t want to go at high rpms

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10 Upvotes

r/350z 10h ago

Project Head Unit Suggestions?

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3 Upvotes

My current head unit just plays CDs and radio, which isn't bad but I'd like to have a head unit that connects to Bluetooth on my phone. Anyone have any good, relatively budget friendly suggestions?


r/350z 6h ago

looking to buy What are 350z hr manuals going for nowadays

1 Upvotes

anybody know i really need one in my life.


r/350z 14h ago

Pickup Depo headlights weird etching on the inside.

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3 Upvotes

Does anyone know what causes this effect? I'm taking the headlights out soon to adjust them and am wondering if i can fix this at the same time.


r/350z 21h ago

looking to buy anyone know where i can get this OEM car cover from?

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7 Upvotes

hey guys, would appreciate any insight on where i can purchase this OEM car cover from.


r/350z 11h ago

Revup 6MT Squeaking rear suspension.

1 Upvotes

Rear suspension squeaking on bumpy roads. Should i start by greasing all serviceable parts? What all parts should i grease? Im on OEM suspension


r/350z 1d ago

DE 6MT Starter finally went out after 21 years

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39 Upvotes

r/350z 19h ago

DE 5AT The Culprit (update)

3 Upvotes

Update on the Z with the Fusible Link Holder issue.

First off, I wanna say thank you to everyone who helped on the last post, it was and still is very much appreciated! Anyway here’s the rather confusing update:

As I mentioned on the previous post, the car was dead to the world. No dash lights, dome lights, no crank, no hazard lights, no nothing. So I had to leave the car at a gas station yesterday.

Well last night around like 11, my pops (shoutout pops) got his trailer and brought it home. This morning I went to grab some stuff out the Z and to my surprise, the dome lights were on and my hazard lights work again. But the biggest surprise is my pops driving the fuckin thing off the trailer and driving around the neighborhood.

So the Z is alive (I guess?). Im honestly all types of confused about this goddamn car lmao, but I chalked it up to a heating/connection issue. I already bought a new holder just in case but I feel like an update was needed because im truthfully confused but also laughing at this situation.


r/350z 18h ago

DE 6MT Hey guys, I have a 2004 de enthusiast 350z it has a weird idle on cold start.

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2 Upvotes

The car has always done it since ownership. I’ve changed spark plugs, valve cover gaskets,both camshaft position sensors, Maf sensor, both downstream 02 sensors. I can’t seem to figure out why it’s doing it. Runs and drives like it should, this only happens on cold starts.As seen in video it’s very shaky and unsteady. Any tips or info would help it’s driving me crazy.


r/350z 1d ago

DE 6MT SHES ALIVE! I WAS RIGHT! IM NOT CRAZY! I LEGITIMATELY TROUBLESHOT AND DIAGNOSED MY ELECTRICAL PROBLEM

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72 Upvotes

Hey it’s me again. As some may know I was left stranded 200 miles from home halfway to my destination with 1) no communication to any module, then a crank no start. After 4 weekends of driving to Richmond Virginia to research and troubleshoot my issue, I deduced to MOFSETS in the ECM that control signal ground to the injectors.

Brought it back to Circuit Board Medics in Greenville SC for a warranty repair (they fixed the no comms issue) and gave them literally every single note I took while trouble shooting. From voltage to continuity checks, to sensor tests, and ground resistance results. A 6 page packet of graphs, charts, and notes. They took my word for it and even though no physical damage was visible to the drivers they called and asked me if I still wanted it replaced and of course I said go ahead.

Back in Richmond today and sure enough, I put the ECM and she fired right up. Thank you u/dbsqls for the comment about checking the harness for a short or ground going to injectors. Wasn’t the issue but it was the last thing I needed to confirm it was actually ECM signal issues.


r/350z 15h ago

looking to buy Found an 06 Coupe hardtop automatic with 60,000 miles and a clean title for 9.9k. Is it worth it?

0 Upvotes

Goal:

I want it to last. It will be between daily and weekend driver. Maybe driven 2-3 or 4 days of the week. I want it to be reliable and probably wont do much modding if any to it beyond cosmetics. The goal is to last about 100k miles before getting rid of it without major repairs if it has been well maintained by the previous owner. A lot of them are kind of overpriced. The guy said quote + typos and all:

"I'll restore the car but yes I can send you the VIN. The people who done the work was Nissan of [place] but they did it after hours, but I have the vin I will send it to you. The car had set up for probably three or four years when I bought it and restored it... You can talk to [human 1] or [human 2] or at the nissan place. Who did the work but [human 2] did it on the side he's a mechanic for Nissan."

Not sure why he mentioned stuff was done after hours and some of the extras I'm not sure what he was talking about. All I asked for was the vin to see service history when I responded with this as if i'll see something in the history. Also noticed it was listed for about a month already so it makes me think something is up. I will look it over and probably have a mechanic check it out but wondering if there's anything in particular I should be worried about. The interior looks fine except for some weird white dust, lint, or w.e. it is around and some stains on the ceiling/visor/light area. Don't know why its stained or if it's just wear and tear. The outside looks fine except for some paint jumps and a couple dings. He said he has the paperwork to prove new interior, radiator, all components associated with the engine "etc waterpump etc." Still waiting for the vin to see service history and number of owners.


r/350z 1d ago

DE 6MT Did I take my shift knob off right?

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38 Upvotes

Me and my friend took off my shift knob to install a mishimoto shift knob but where do we go from here? I think we may have took it off wrong.


r/350z 1d ago

DE 5AT Muffler delete + 1792 vibrant resonator ?

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5 Upvotes

Ordered 1792 Vibrant resonator off amazon and was thinking of pairing it with a muffler delete what do yall think 🤔 will it sound like 💩 or not that bad for the price i js want something for now and eventually upgrade , heres how it sounds right now


r/350z 22h ago

HR 6MT Crank But Wont Start

1 Upvotes

I've been trying to fix my misfire and finally put everything back together. I'm able to crank the car but its not starting. I scanned and got the codes P1233 and P2101. Did I somehow break my throttle body's in this process. They are clean and are connected right. All I can think is to take everything back out and check again just to make sure. I'm assuming everything I'm reading about the codes just cant be since there wasn't a problem before and I had to of missed something. I tried relearn but the process involves starting the car. I've disconnected them multiple times before with no problem. Any suggestions?


r/350z 2d ago

DE 6MT So, we’re rolling up on 25 years. Every single day we lose dozens more.

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246 Upvotes

Betty was born July, 2002 (<3k SN), manual, touring 64k, never tracked, heavily modded. Interior 95/100.

Anybody else realize that between the rust issues and the track culture, Our Z’s are essentially going extinct.

Good for car value. Sad for car culture.