M35 Boost Level

[scotty nm35]

Just fitted a boost gauge to my M35 as the dash mounted one doesn't work. I found the boost sitting on 16 psi from just over 3000 revs, then dropping to 13 up high (probably due to the compliance cats, all 4 of them.) is this normal? I thought these cars had 2 stage boost. I cant see any mods to the solenoids or piping?

[zei20l]

there is a solanoid that controls boost, its just under the engine cover on the right....

as for boost dropping off, its because of a few reasons, yes the exhaust is restrictive, and im guessing that the turbo is out of its efficiency range that high up in the revs.

your car is an RS? you have an aero kit with fog lights. maybe the fogs were optional with aero?

[iamhe77]

probably due to the compliance cats, all 4 of them.

Get rid of that exhaust ASAP Scott.

It will help kill your turbo (as it did mine) and set you back a couple of grand.

your car is an RS? you have an aero kit with fog lights. maybe the fogs were optional with aero?

Yes they were

[scotty nm35]

Yep, an RS four. I havent done the fast check yet as the version I found was only up to 01, but the options seem to be hardcoat, aero with lower and lowbeam fogs, factory hids working and factory tint?

I would like to know if it has LSD also.

If anyone gets the chance to plug it in, its : NM35-304741

Also, I was surprised to find the aluminium bonnet. Very nice.

[iamhe77]

Yep, an RS four. I havent done the fast check yet as the version I found was only up to 01, but the options seem to be hardcoat, aero with lower and lowbeam fogs, factory hids working and factory tint?

I would like to know if it has LSD also.

If anyone gets the chance to plug it in, its : NM35-304741

Also, I was surprised to find the aluminium bonnet. Very nice.

Tint is standard across all models.

For some reason, FAST is not displaying any factory options.

I can tell you that you car does not have HICAS though.

[scotty nm35]

Aero kit could have been put on after I guess?

Car came with what seem to be Nismo 17x9.5 inch rims, rear wing too.(part of the kit?)

Are all m35 lowbeams adjustable from inside? neat addition.

[iamhe77]

Aero kit could have been put on after I guess?

Car came with what seem to be Nismo 17x9.5 inch rims, rear wing too.(part of the kit?)

Are all m35 lowbeams adjustable from inside? neat addition.

Could have.

So you have LMGT4's on that thing? What colour (Black would be ace)?

Rear wing will probably be from the Nismo body kit as the Aero kit did not have one as far as I know.

Yep, all headlights are adjustable from inside in 4 (?) stages (0, 1, 2 and 3 - the higher the number, the higher the beam)

Edited June 20, 2009 by iamhe77

[scotty nm35]

Photos links in my sig. I just set them up.

Black rims... looks great. Nearly as good as r34 gtr rims?

[iamhe77]

Can't see the Nismo logo on them, but if they are genuine Nismo's they certainly are LM GT4's... and worth much more than R34 rims.

Look great back as well.

Edited June 20, 2009 by iamhe77

[Jetwreck]

nice ride mate.....black rims look awesome...good contrast.....have you figured out what suspension you have because it does not look standard. As for the boost mine used to start off at 16PSI and bleed back to 12PSI even after the exhaust was done.

[scotty nm35]

Ok, it seems there is no 2 stage (unless you switch to snow), with masses of pull from 3000. 16psi seems high for standard, do these factory turbos have a ceramic ex. wheel?

It seems like the throttle has a soft action at launch, there is no way to spin the tires even on dirt it seems, It just pulls away like its got traction. Do they all drive like this? If so, bring back the good old cable I say.

[scotty nm35]

nice ride mate.....black rims look awesome...good contrast.....have you figured out what suspension you have because it does not look standard. As for the boost mine used to start off at 16PSI and bleed back to 12PSI even after the exhaust was done.

Springs: Standard rears? King front.

Shocks: Stuffed

I'm getting a turbo back 3inch stainless system fitted on Wednesday and as soon as my tax is done I will probably import a set of HKS LS+ coilovers. That should get all the issues sorted.

[iamhe77]

I'm getting a turbo back 3inch stainless system fitted on Wednesday

Custom or JDM?

If custom, where from?

[mxfly]

Your RS Four will put torque to the front wheels at a slight sense of traction loss from the rears. And 16psi is about on the mark. I dynoed my car and it peaked at about 15.5, then dropped off.

[scotty nm35]

Where I bought the car, Kamikaze in Nunawading are doing a custom full system as part of the purchase.

[mxfly]

Adn your car looks nice with the black rims but I can tell you they're not LMGT4's. They're a Chinese made rim called Drift Teks.

[scotty nm35]

Your RS Four will put torque to the front wheels at a slight sense of traction loss from the rears. And 16psi is about on the mark. I dynoed my car and it peaked at about 15.5, then dropped off.

Feels soggy (a ramped feeling)taking off untill 3000 then madness. If I back off after a boot, the gearbox seems to hold its gear too. The auto probably needs a service.

[[[d a n n y]]]

they look like koya driftek or URAS NS-01's

[Bis-e Bee]

Get rid of that exhaust ASAP Scott.

It will help kill your turbo (as it did mine) and set you back a couple of grand.

But it does give you the extra push to go the whole hog and get a high-flow

Aero kit could have been put on after I guess?

From what I've seen, the Aero is NOT put on FAST, my car has the factory aero kit and FAST does not mention it, I don't think

Iain's (ziel20l) had anything on FAST in regards to his kit either.

Feels soggy (a ramped feeling)taking off untill 3000 then madness. If I back off after a boot, the gearbox seems to hold its gear too. The auto probably needs a service.

You driving in Automatic mode I assume? Try manual shifting, it's must more fun

[pixel8r]

Your RS Four will put torque to the front wheels at a slight sense of traction loss from the rears. And 16psi is about on the mark. I dynoed my car and it peaked at about 15.5, then dropped off.

Are you SURE?

My M35 RS4 is 100% stock, haven't touched the car mechanically except servicing and I changed the stereo. According to the factory guage its maxxing out at ~0.8bar which is under 12psi. That sounds more likely. I've never heard of any Nissan coming out of the factory with more than 12psi except for the new gtr. and even the aussie version of that runs 12psi.

You may have a modified exhaust/turbo or intake?? Maybe pressure is being leaked somewhere, causing the wastegate to stay closed longer?

It is a ceramic turbo - so it seems very unlikely Nissan would design the car running higher boost than the turbo can handle. And we all know that ~14psi is the physical limit of the ceramic turbo.