M35 x tuning please help

[Supamon]

first let me say im just learning of the vast possibilities in tuning a vehicle. Mainly due to a slight disappointment in my 06 m35x.... Car is cool and i love how it looks and I just love the infiniti/Nissan brand right now....

but

im coming out of a 04 Maxima SE.... and even though that car got me into trouble. Im missing the low end torque with this new car... ohh and gas is a biotch.....

so anyway strangely enough there is not much out there for the M line and varying opinions as to what will work or not. However im learning that the M35 is more tunable (i dont even know if thats a term) then the M 45 because it shares at least the same engine as the Z and G series...

so now im trying to find out 1) is this true and has anyone had success tuning their M 35 and 2) whats the best route.. Mind you.... im not Vin Diesel or Bow Wow.... I just want to be able to come onto a freeway via exit and quickly accelerate onto merging traffic without seeing My RPM's fly off the roof and car feel like im in a high speed chase..

I heard varying opinions from this board in the M forum but in not sure if they are referring to the 45 or the 35.

I heard some intake installations don't work because of the way the engine compartment is built..... your actually sucking in hotter air. Ive heard that those oil intake system actually hurt nissan engines because the wider filters are vulnerable to debris getting in and while the stock intake is sufficient... Ive also heard that some intakes have worked fine but an intake and exhaust actually hurt the car without an ECU flash. Im not even sure if ECU flash is available for this car or if im even using the correct term.. lol

long story short i want an intake and an ECU flash, but i dont want to waste my money, while only making my car nosier....

Please Help

[joe603]

You may want to try the M forum...

As far as tuning G's, you really only get decent results if you have FI.

[Supamon]

FI?

the M guys sent me over here... lol

[pfarmer]

FI?

the M guys sent me over here... lol

I often wondered about the real differences, if they are partly just specifications that are listed, etc.

Maybe a tech here can come on board and tell you what really is the difference between a 'G' engine and that in a 'M'. To me the higher luxury car should have at least the same performance out of the engine, not less. One could expect lower performance from the car itself with the same exact setup if the weight dictates it.

Perry

[kmckis1029]

+1

i was thinking weight too... bigger car same engine... slower car...

[Sentientbydesign]

Your M has a few things going against it.

First is the AWD system which adds weight and requires more power to move.

2nd is weight which is amplified by the fact that you have the AWD version.

As for mods, I'd assume that most of the G mods can be modified to fit the M. Again, the AWD system is going to rear it's ugly head here though. IIRC, the G35X has limited exhaust options because of the AWD system.

I'd consider shedding a little weight in the form of lightweight rims and tires (the same size tire from different manufacturers can have significant weight differences).

A plenum spacer might be a really good place to start. I don't usually recommend it as a first mod, but seeing how you have the same VQ35DE that is in the G, it should fit without issue (assuming there's hood clearance).

[pfarmer]

+1

i was thinking weight too... bigger car same engine... slower car...

Well see this is not exactly what I said. The car itself is a little heavier (I would guess it is without looking it up). But at least on a newer M35 versus a G35 the hp and torque ratings are not the same for the same engine size within the same year.

The 'M' is rated (2008) at 275 horsepower and 268 pound-feet of torque.The 'G' on the other hand is rated at 306 horsepower and 268 pound-feet of torque (at least for 08 and I think 07). Assuming the numbers are correct then there is also a difference other than weight that will affect performance. I think weight wise for the same AWD model that the 'M' was a little less than 200 lbs difference. About the same as putting two wifes or a wife or a half of wife into a 'G' (take your pick).

Perry

[Sentientbydesign]

Well see this is not exactly what I said. The car itself is a little heavier (I would guess it is without looking it up). But at least on a newer M35 versus a G35 the hp and torque ratings are not the same for the same engine size within the same year.

The 'M' is rated (2008) at 275 horsepower and 268 pound-feet of torque.The 'G' on the other hand is rated at 306 horsepower and 268 pound-feet of torque (at least for 08 and I think 07). Assuming the numbers are correct then there is also a difference other than weight that will affect performance. I think weight wise for the same AWD model that the 'M' was a little less than 200 lbs difference. About the same as putting two wifes or a wife or a half of wife into a 'G' (take your pick).

Perry

The HP differences are due to the G and M having two different engines for 07/08. The G35 Sedan received the VQ35HR in 07 and was bumped to the VQ37VHR (I don't remember the engine code exactly) for 09.

The M on the other hand, has had the VQ35DE since it came out. So the M35X is comparable to the G35X between 03-06.

[pfarmer]

The HP differences are due to the G and M having two different engines for 07/08. The G35 Sedan received the VQ35HR in 07 and was bumped to the VQ37VHR (I don't remember the engine code exactly) for 09.

The M on the other hand, has had the VQ35DE since it came out. So the M35X is comparable to the G35X between 03-06.

Note I stated 'engine size' in my post. I believe the Altima for 08 also had the same engine which is one reason (besides awd) that I went to look at Infiniti.

If the 09 'M' has the same engine as the 08 G35 it still is rated slightly different at 303 instead of 306. Not much and if I had liked the interior of the 'M' x i may well have leaned in that direction since I do like the exterior of the 'M' especially if dressed up a little bit better than the 'G' mostly in how the rear side windows are treated.

Perry

[Sentientbydesign]

Note I stated 'engine size' in my post. I believe the Altima for 08 also had the same engine which is one reason (besides awd) that I went to look at Infiniti.

Perry

Doesn't matter as the two engines are EXTREMELY different. Displacement is just that. Displacement.

[pfarmer]

Doesn't matter as the two engines are EXTREMELY different. Displacement is just that. Displacement.

Again which is what I stated 'same size'. In the case of the 09 'M' however is it the same engine as the 08 'G'?

Perry

[USAF_G35_Guy]

I'm assuming it's an auto Supamon, as I've never even heard of a MT M35 or 45.

in that case, I've also heard that grounding kits are a significant improvement on autos. Makes them rev/accelerate faster, shift quicker, respond better etc...something to look into. good bang for the buck.