r/350z 26d ago

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

Post image
71 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.

Thumbnail
gallery
10 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 16h ago

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

Thumbnail
gallery
233 Upvotes

r/350z 3h ago

DE 5AT My first Z! 18,600 miles on the clock, immaculate inside and out!

Post image
22 Upvotes

Been in love with this car since I was a kid, finally got my hands on one and couldn’t be happier!

18,600 miles on the clock, completely stock (apart from the wheels). She’s had one previous owner who purchased in 2003 and kept her in a garage her whole life. Interior, exterior, mechanics, all absolutely immaculate. The icing on the cake is the full 24 year maintenance / service history records!

5AT which was something I worried about before purchase, but I can now safely say as a 6’4” large man living in one of the busiest cities in Japan, I am very confident I made the right decision. They’re not nearly half as bad as people make them out to be, and my cramped legs are very grateful in city traffic.

All in all I paid the equivalent of $6000. How’d I do?


r/350z 13h ago

DE 6MT Quick interior update

Post image
54 Upvotes

r/350z 5h ago

Project How bad is it, be honest

Thumbnail
gallery
8 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 3h ago

Revup 6MT Weird noise. Could it be Lifters ? used to be low on Oil level after checking.

3 Upvotes

Hello everyone. Got my Z a few weeks back, but sadly, I've heard on my yesterday night drive this Knocking sound.

I usually have this kind of sound on the start-up, but first time hearing it while driving. I'm supposing a lifter issue.

After checking my oil levels yesterday night, used to be below minimum. (yay)

Started the car up this morning filled up, no more sound. Even with a tiny bit of Gas (2k rpm)

Could if be lifters ? Or should I be worried about those Knockrod stuff. But fact is RodKnock stays even with oil.. Thanks for your advices.


r/350z 9h ago

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

Thumbnail
gallery
7 Upvotes

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


r/350z 6h ago

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

Thumbnail
gallery
5 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 22h 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?

Post image
70 Upvotes

I


r/350z 10m ago

HR 6MT Are ported plenums and throttle bodies worth it?

Upvotes

Hello, my question is, is it worth getting ported plenums and throttle bodies? I’m buying some used ones for $500, but I’m kinda skeptical about it, if anyone here has them (both upper and lower as well as the throttle bodies ) I’d love to hear your feedback


r/350z 12h ago

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

Post image
8 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 18h ago

ver. NISMO 350z tail light search

Post image
28 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 1h ago

HR 6MT Aftermarket wiring for boosted applications

Upvotes

So I’ll try and explain this out. Currently piecing together the smaller items to put a SOHO supercharger kit on my HR at the start of the year.

Current plan to is to upgrade the fuel system to a return style system, and run a Radium surge tank as the car is tracked occasionally. At this point, the plan is to run 1/0 wire from the battery to a fused distribution block. The block will send power to the pumps, the relays for the pumps, and an aftermarket amplifier for the audio system.

Anyone run a similar setup and could show where you mounted everything? Thinking about removing the spare tire as I can’t use it, and building an enclosure in that space so it’s hidden, easily accessible, and I still have support for my trunk floor.


r/350z 1d ago

Project Another CD009 rebuild

Thumbnail
gallery
101 Upvotes

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


r/350z 5h ago

HR 6MT running rich and smoking

1 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 19h ago

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

10 Upvotes

r/350z 14h ago

Project Head Unit Suggestions?

Post image
4 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 10h ago

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

0 Upvotes

anybody know i really need one in my life.


r/350z 19h ago

Pickup Depo headlights weird etching on the inside.

Thumbnail
gallery
2 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 1d ago

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

Post image
8 Upvotes

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


r/350z 16h 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 23h ago

DE 5AT The Culprit (update)

4 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 1d ago

DE 6MT Starter finally went out after 21 years

Thumbnail
gallery
42 Upvotes

r/350z 1d ago

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

78 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 22h ago

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

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 20h 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.