hard knocking noise when going WOT

[MidN1te]

the only thing i could think of replacing right now besides the mounts.. is the wheel bearings and hubs... i'm getting a slight humming noise as the speed increases... i've this problem on my s2000 in the rear so its sounding familiar...faint..but familiar...

thats why i figured i would replace those.. i dont think there is anything wrong with other stuff... so i normally dont replace until things go wrong...

but in my years of being a mechanic.. both in the Army and out... preventative maintenance is the best maintenance...If you up keep things, less things to go wrong...

not worried about this maxima so much at all.. but on a turbo s2000, its crucial...

[Rochester]

Originally Posted by Rochester

...and the ball joints, and the tie-rod ends, and the radiator, and the brake lines, and the alternator, and the MAF...

I forgot to mention the oilpan, but only because mine is nasty.

[MidN1te]

Originally Posted by Rochester

What's the (approximate) parts & labor cost for a job like that, Ghost?

well personally i've found deals like $327 for 2 wheel bearings and 2 hubs.. go to advanced auto... rent the bearing press... do it yourself.. i do... saves alot of money and its easy.

[knight_yyz]

Originally Posted by MidN1te

i'm wondering if that maybe my next project then...I'd like to go ahead and replace the wheel bearings whether i need them or not...

but that's in due time... first i wanna make sure the mounts fix my issue...

did you by any chance dyno the headers and bolts on FIRST before you tuned? becuase i'm wondering how much more power did the tune make after the initial install of headers and stuff.

Run one is stock, run 5 is headers no tune, run 9 is headers tuned, run 12 is spacers and 06 tranny swap tuned.

[MidN1te]

So the tune didnt help so muxh with the hp but more tq. Wat spacers did u say u had? Wat kinda spacers do u have and where do they go? Are u talking bout intake manifold spacer?

[Ghost_54]

Originally Posted by Rochester

What's the (approximate) parts & labor cost for a job like that, Ghost?

I had my brakes and rotors all replaced at the same time, but it would be between 400-500, your looking at approx. 90.00 each for the bearings they will need to be pressed in so another 80.00 a couple hours shop time approx. 90.00 per hour and then another 100.00 for an alignment ... just ball park numbers Rochester but you get the idea.

[Rochester]

Originally Posted by Ghost_54

I had my brakes and rotors all replaced at the same time, but it would be between 400-500, your looking at approx. 90.00 each for the bearings they will need to be pressed in so another 80.00 a couple hours shop time approx. 90.00 per hour and then another 100.00 for an alignment ... just ball park numbers Rochester but you get the idea.

I do. Thanks for the perspective.

[Ghost_54]

Originally Posted by MidN1te

So the tune didnt help so muxh with the hp but more tq. Wat spacers did u say u had? Wat kinda spacers do u have and where do they go? Are u talking bout intake manifold spacer?

Tuning also helps in making the overall engine perform at its peak performance, improving fuel efficiency by tuning the air to gas mix, so tuning isn't always about horse power and torque.

[knight_yyz]

Originally Posted by MidN1te

So the tune didnt help so muxh with the hp but more tq. Wat spacers did u say u had? Wat kinda spacers do u have and where do they go? Are u talking bout intake manifold spacer?

Nothing I have done after the headers has improved PEAK horsepower, but look at the range between 2k and 5K and see the difference. The spacers I'm talking abut are the NWP phenolic spacers

[Rochester]

Originally Posted by MidN1te

So the tune didnt help so muxh with the hp but more tq. Wat spacers did u say u had? Wat kinda spacers do u have and where do they go? Are u talking bout intake manifold spacer?

Yes, replacing the intake manifold gaskets. Here's the seller:

http://www.nwpengineering.com/Phenol...rs.html#VQ35DE

And here's the whole, huge development thread from start to finish:

Phenolic Spacer Development for VQ35s

And here's my thread from this summer. I gave those spacers a long, hard look before pulling the trigger. Very, very happy that I did.

Seeking long term assessment on NWP Spacers

[MidN1te]

Yeah i see the graphs. Where did u get the car tuned? I dont have a dyno graph of my turbo s2k but it literally has such a straight line u could write ur name on it. But i have a full aem 1052-u stand alone. Overall does the tune make the car feel that much better and powerful? Or is it the buttdyno and psychological mind thinking its improved. Again i see the graph but its not smooth. But then again the stock run wasnt either

[knight_yyz]

it's not a flat line because of the VIAS butterfly. Dips at opening and closing.

Car was tuned in Burlington Ontario, DL motorsports. And yes it feels way more powerful through the low end and midrange. I can light up the tires in second and third.

[MidN1te]

Originally Posted by knight_yyz

it's not a flat line because of the VIAS butterfly. Dips at opening and closing.

Car was tuned in Burlington Ontario, DL motorsports. And yes it feels way more powerful through the low end and midrange. I can light up the tires in second and third.

No i meant that the squiglyness of the lines...looks like serrated edge of a knife...

I think i've heard of DL motorsports... A couple of s2000's were tuned from there and i dont remember lines looking like that...I'm assuming its just the maxima then.

I do definately see the gains though and man thats so promising. How do you like your emanage? I was debating on doing the techno square and just having it reflashed...Obviously an individual tune from a piggy back would be the most beneficial because as you would know, all cars are different.

I'm auto, and if your lighting up the tires in 2nd and 3rd, i better get the valve body mod because my tranny is gonna die lol... my first maxima did the same which was an 02 and my tranny that came with the car died...this is my 2nd tranny.. its a low mileage tranny and works like its supposed to so i think i should take the step to do the valve body mod and have it rebuilt to shift quicker...specially with gains like yours..

Do you know or remember the name of the dyno that DL motorsports uses? judging by ur numbers i'm assuming dynojet or something similar...

if its a dynodynamics, i'd be going crazy happy because that is one of the lowest reading dyno's..also known as the heart break dyno...if you can push those numbers on THAT dyno... then i will Bow gracefully to ya hahahaha..

well u are one of my inspirations and i cant wait to do this. because techincally your pushing over 300 to the crank.

so let me ask.. the intake manifold spacers... i haven't clicked on the links yet, but i'm assuming its the same method to taking it off as if your gonna change the rear spark plugs right? because i did this and it took me 20 min to do... and i can do it all at once.

[MidN1te]

hahahaha nevermind.. i just saw the instructions.. thats alot more involved than i anticipated...

[knight_yyz]

DL motorsports uses a dynojet. And there are always neons and s2000's and mr2's getting turbos slapped on their cars there. I even saw a turbo viper there pushing 900 whp when I went for my last tune.

I'm pretty sure the jaggedness of the lines is the ecu pulling timing, but maybe an all motor guru can step in to confirm that

[MidN1te]

Originally Posted by knight_yyz

DL motorsports uses a dynojet. And there are always neons and s2000's and mr2's getting turbos slapped on their cars there. I even saw a turbo viper there pushing 900 whp when I went for my last tune.

I'm pretty sure the jaggedness of the lines is the ecu pulling timing, but maybe an all motor guru can step in to confirm that

So what other mods do you have?

i'm looking at the phenolic spacers, ssim, and the block off plate as well..

just wondering if its really worth all of it..

[knight_yyz]

custom intake, cattman headers, cattman fastcat, cattman exhaust, fidanza flywheel, stage 1 clutch, spacers, and a tune. I have a custom short ram BBMAF hybrid with flow stack, larger injectors and a block off plate to install next year.

[MidN1te]

nice... i'm definately gonna be there well close to it hahaha