Vq35De And M35 Axis Help

[jasevr4]

Remap for power and economy. Most tunes will end up giving better fuel economy and more power. From there it depends on how you drive it as what the figures will be.

[iamhe77]

^What he said

Also, high flow cats make a noticeable difference for both power and economy.

Any way you can remove/minimise restrictions will net you a slight increase in power and economy.

Pm35 power is good enough for normal commuting but does not have the torque that the nm35 has.

Also, the 3.5 doesn't really do much below 3000rpm. It is better than the VQ25det down there, but is much more enjoyable between 3500-6000.

As an ex-nm35 owner and current pnm35 owner, there is no chance I would go back... even though I do miss the torque from the turbo.

[iamhe77]

Also, Alex mentioned the screen issue. Here is a simple "fix" for it... unless you want to replace the entire unit.

[PN-Mad]

you will never re-map it for more fuel economy. It runs wideband o2 connection as scotty said. Unless you want the tuner to lean tune it and loose torque to gain economy, it just wont work. Removing the fuel out the top end will give economy, because it runs <10.5:1 AFR in the top end, but if your that concerned about econ, you wont be flogging it.

anyway, its just not economical. So youll need to get over that if you want one, or buy a diesel.

[iamhe77]

ECU dictates the target AFR, not whether the car has wideband o2 sensors or not.

Remap for a leaner AFR would mean better economy. Nobody said that the tune has to target 14.7:1, especially if you manage a way to get a more complete and efficient combustion process...

[chef_stagea]

What exhaust options are there?

Not super keen on bashing cats out lol

[PN-Mad]

front wise, anything from 350z/V35 to the end of the Y pipe, rear of that, anything from a V35/G35 sedan

[chef_stagea]

Makes things fairly easy?

[PN-Mad]

As easy or as hard as you want them to be

Depends what your after.

[scotty nm35]

ECU dictates the target AFR, not whether the car has wideband o2 sensors or not.

Remap for a leaner AFR would mean better economy. Nobody said that the tune has to target 14.7:1, especially if you manage a way to get a more complete and efficient combustion process...

As Alex mentioned, leaning out the mixture drops the energy available to combust and usually means you need to put your foot down more, just to get the torque required to cruise. I must admit I haven't played around with petrol mixtures a lot, as leaning out 98 is a bad idea generally, but running a huge range of ethanol tunes from 10:1 through to over 20:1 on cruise I now realise near stoich is where it's at. Leaning it out to 15's is going to barely make a difference to the wallet unfortunately. Foot control of the pedal has more chance of fuel savings.

Seriously, they are never going to be lean running cars, they are simply too heavy to compete with modern buzz boxes with their skinny tyres and sub 1 ton weight. Thinking a quick retune will gain noticeable savings... Perhaps if you plan to do massive k's to cover the tune costs. Limiting the throttle to 20% would be a better idea.

[Hertz Donut]

[minor threadjack]

front wise, anything from 350z/V35 to the end of the Y pipe, rear of that, anything from a V35/G35 sedan

Does this hold true for PNM35s as well or does the AWD get in the way? I've been trying to find something for mine and while I've found the Zee's ones on YAJ they'd cost over $2K landed here in NZ and I'm pretty sure I could get a reasonable custom one built for that price.

[/minor threadjack]

Edited July 23, 2013 by Hertz Donut

[M35woah]

iamhe77 has used a v36 y-pipe and dual mufflers, I believe he has a video somewhere.

Edited July 23, 2013 by M35woah

[ironpaw]

All this economy talk...just covert it to LPG and be done with it....

and hope your installer doesn't drill a hole through your firewall and forget to waterproof it

[scotty nm35]

lol.

I agree, after feeling the power in your liquid gas setup mate, I am impressed. Just needs bigger injectors.

[PN-Mad]

[minor threadjack]

Does this hold true for PNM35s as well or does the AWD get in the way? I've been trying to find something for mine and while I've found the Zee's ones on YAJ they'd cost over $2K landed here in NZ and I'm pretty sure I could get a reasonable custom one built for that price.

[/minor threadjack]

The Y pipe 350z v PNM35 is very different, to get around the transfer case. Thats one difference. The other potential difference is the front shaft with HFCs or test pipes. I just don't know if they will fit or not. Some have massive seperate chambers etc, but the normal single HFC ones should fit ok.

[joshm35]

Didnt the rear underbody canister near attessa system have to be moved or modified to fit the twins.

[PN-Mad]

tilted I think I heard Cam say, but we dont have an ATTESA system, like nm35s do.

[scotty nm35]

Yeh, the carbon canister needed to be moved, and the right muffler 'massaged'.

[iamhe77]

Carbon canister is still there, it just sits horizontally and without the bracket.

V36 exhaust has massive rear mufflers and yes, the driver side one has to be "persuaded" to clear the spare wheel well lol.

Also, Scott had to weld up two additional exhaust mounts to hang the driver side on.

No problem with HFC's from the US. My PNM35 has G35 Berk cats which bolt straight up to the standard exhaust... they also bolt up to my V36 exhaust.

NM35 cat-back exhausts will also bolt up to a series 2 Y-pipe, regardless of whether it is 2WD or AWD.

As Alex said, the only thing that won't fit is the 350z/G35/V35 2WD y-pipe, so if you are looking at a US exhaust make sure it will fit on a 2003-2004 G35x.

Also, forget any coupe exhaust due to the spare wheel well.

If you are looking at headers, be warned that some of the 350z headers will foul on a PNM35 bodywork. You can fit them, but some will be sitting on the bodywork which is not so good considering how much the engine can move...

Zees exhausts cost heaps but seem to be very good quality from everything I have read (sound good too). Probably cheaper to get someone to fabricate up some exhaust mounts to fit a V36 exhaust and purchase a V36 (or G37x compatible) exhaust if you want dual mufflers though

[NicPM35]

Reviving an old thread here. (trying to find info on using different model cat back exhausts)

I've got a pm35 stagea, wondering if other models like M35 or NM35 aftermarket cat backs will bolt up?

For example:
https://www.rhdjapan.com/fujitsubo-legalis-r-exhaust-muffler-nm35.html

 

Cheers