Brakes, Fuel / accelerating, Suspension (new info not ur smae boring old post)

[Wu1x]

Hey

I don't post much, but I am having what seems to be random j30 problems,

Before I start I should note that I have injectors from a KA24DE, ngk dual platnum plugs, cold air intake (i can make more if neone wants), 18's, x-drilled n slotted rotors.

I have problems accelerating when my gas is near and ore below 1/4 tank the problem was easily fixed with a aftermarket walbro 255lph fuel pump and a after OE rebuild kit, you cna also recycle your origonal parts off ur sending unit if u wanna clean them I did it to my friends b4 I did mine...

this fixed my inabulity to accelerate.

Today i went to rebuild my calipers and nocied they suck, has anyone tried to fit 300zx 4piston calipers on their J30 yet? I don't wanna do it on my own, and my friend is too chicken to try new things.

I know the suspension thing has been flying around for a long time, though i have not yet installed it we have measured it at my local Infiniti dealershipand compared 1 to one on a 1994 300zx 94 j30 (non hicas) two seater the rear shocks though they are .75 inches shorter use the same mount and have the same angle as the rear in the j30, in the front is' almost 1 inch shorter but it is the exact same shock. My selected parts are kyb gr2 shocks, and tien h-tech springs, they limit the ammount of drop to 1.75 in the front and 2 inches in the rear and I hope if anyone is gutsy enough to try this before to let me know!

[email protected] is my msn

[windowlikker]

bravo.. I have 300zx Pillow ball tension rods in front on my 93 J30, and they work great. I have the same z32/r33 brake mod questions as you..

Can you tell me more details on the 300zx suspension measurements?Is the whole front strut assembly the same mounting points on both?

Something has to work.. No more of this "only OEM" bs. Let's find something that works..

[krin2000]

i would like to know too!!! if you send me free parts i will try it out lol my j30T in already dropped 3inch and i want a better suspension otherwise im going to air bag my J

[windowlikker]

How did you drop your J? Did you just cut the stock springs?

[krin2000]

How did you drop your J? Did you just cut the stock springs?

cutting springs makes your car feel like a tin can ridei burnt mine. meaning i took a measuring tape and measured from the top of my wheel wel to the center of the rim then i torched the spring to softin the spring. u heet the spring and you lower the car.

but i found bag kits that i can use but im trying to find out if it can be done with a HICAS suspension

[windowlikker]

Just picked up some Skyline R33GTS brakes on ebay. Should be bitchin.. Same as the Z32 300ZX calipers, only with 296mm rotors instead of 280. I have 17" g35 wheels, so clearance is no problem. I'll get to sell my stock setup to a 240sx guy! ha ha (Nissan cross platform compatibility is awesome!)can't wait to install..

[Wu1x]

The measurements on the struts were made while they were installed on the vehicles the Z's were shorter and the mounts were the same in size and orientation. I chose the kyb's cuz there the longest shocks, and the h-techs because they drop the car the least and maintain a better feel, also i have 18's on my car and don't want them to rub.

If u also get the shop manual.u will notice that the rear and front suspensions are the same little ****ty picture.

[Wu1x]

Heres my car

[windowlikker]

here's some of mine.. still need to install those wheel spacers.. BTW, what did you use for a Cold air intake? I'd love some pix and details.
Modified by windowlikker at 6:03 PM 4/3/2007

[Wu1x]

3inch pipe, 2.75 pipe couplers reducers maf adaptor, 90degree 3" mandred hole saw and a welder and aem dryflow filter 6"x3"

I can make more and ship out in stainless steel (alot cheaper) or aluminum.

i took the heat sheild out that works as a brace because I was working on the engine recently and it got dark and i got lazy.

also I don't have wheel spacers wheel spacers are bad!!!!!!

[gr8scott72]

I like the idea of a CAI but don't know if I want to get rid of the equal length pipes going from the MAF to the throttle bodies.

What kind of price are you talking about?

(And get the engine bay cleaned up )

[Wu1x]

Equal length pipes are not overly important, on a n/a vehicle. I gain alot more kick and throttle responce and a much needed sound. I street dragged vs. a black j30 same year and i whomped him something good.

They cost about $650 made with a basic air filter add about 80bux for a aem dryflow there still expensive.

Thats made in stainless steel straight and mandrel bend.

aluminum is like $900 cuz i have to pay someone outsource to weld it...

I'll clean my engine bay when i get a nissan 3000 engine cover and a chrome plenum. and finish building my new heads. but i'm runing on a stock bottom end cuz I'm out of money for uber parts.

[windowlikker]

$$$ ouch! $650-$900 for a CAI? Um, Good luck with that..

Why are wheel spacers bad? I see them used on Road racing cars all the time with no problems.. (Vipers, Porsches, Mini's, etc) Maybe the quality of the spacer makes the difference??

[Wu1x]

Wheel spacers are bad for nissans they have short studs to begin with. most people don't properl;y use wheel spacers but u can put 18x7 on the j30 without needing a spacer, if u want spinners just get a deeper offset rim.

I use wheel spacers on many cars but I still recomend just buying a rim that will fit your car and limit the stress on your hub and studs.

a j30 isn't a viper nor does it have 1.75inch long studs.

but either way...

When u mass produce CIA's i'm sure u can lower the price but the man hours required and mandrel bend steel or aluminum is not cheap.

[windowlikker]

Of course I'm putting longer studs in.. I thought you meant in general wheel spacers were bad.. Maybe if the installer doesn't know what he's doing. haBTW, I race a Porsche 996 in a Viper club (don't ask!) so I do know a little somethin somethin...

I ended up with the G35 wheels, so offset wasn't a choice.., just need to be spaced out a little bit..

Thanks to Nicoclub forums, I was able to fix my sunroof, interior lights, Bose head unit, tension rods by myself, armed only with a pair of pliers and a soldering iron. Thanks everyone!

[Jakw]

Woah woah woah...hang on. So did those first posts say that we can just buy shocks and springs that fit a 300zx, and it'll fit?

Also, to the dude that made the intake - $600?! What did the one you have now cost you?

[swimshark]

$650 for an intake? i could use pvc pipe and hoses for about $40 and get the same effect. already have a 4" cold air intake leading up to the maf. spent maybe $40 on it.



did you use a 3" hose also to connect the pipe to the throttle bodies? it seems smaller to me than 3".here is my J30 with its set of G35 wheels:

$450 with tires. hehe friend had them already painted too. what u need spacers for? my G35 wheels are 8.5" in the rear and i still could fill the wheel well with maybe a 9"-9.5" wheel to make it flush. rides fine and alot smoother.

[StevieRaySTL]

-- Swimshark, whats up with the second pic? Is the air filter disconnected, or really close to the ground? Window, nice rims it's cool to see a couple Js with the same G35 wheels, I paid 50 a piece for mine, tires were kinda pricey but I really like them. Sprayed the rotors and calipers black, but I'd really like to do a G35 brake conversion. Very interested to see what everyone comes up with on the suspension issue, please keep me posted. I'd like to drop my J in a few years when I aquire a newer dd. What kind of exhaust setup you got, wu1x? Pix of my J.....I've cleaned under her bonnet since last time I posted pics, thought I'd show it off.

[swimshark]

nope its connected. 4" piping. cut a 4.5" hole below where the stock box sits and put a 4" dryer duct pipe through it. sounds cheap but it works. took the metal bracket off the stock box and put it on the dryer duct piping to connect it to the maf securely.air filter sits right behind the drivers side blinker. the reason i took the grill i got from a junkyard and cut it to fit in place of the stock blinkers. mounted the signal after putting some plastic wrap around it to keep water out and mounted it on the inside towards the outside corner of the grill i made. they allow the air to flow straight in and hit the air filter. works great and looks neat. im thinking of trying the straight 3" pipe across but im gonna make it out of pvc. can get materials from home depot or lowes for under $50 easily. should have the same effect since it is a NA.

btw, do u have the 245s on the back of your J there stevieray? i have 225/50s (soon to be 45s when i need new tires) on the front (goodyear eagles) and 245/45s on the rear (kumho ecsta ast). i want to lower my J also but im thinking of saving money to my twinturbo project coming up when i get the money and a new DD.

the reason i dont want to spend much on mods is cause there isnt much you can do to get a big hp gain than with a forced induction engine. for the $650 wu1x spent to get a gain of 5-10 whp, the same amount could have been spent on a 300zxTT and have a 100whp gain (trust me 2 of my friends have done it for under $500). i dont see the reason to put tons of money into a NA motor just to get maybe 30-40whp. ive spent maybe $125 or so and have a 20whp gain just because i used cheap stuff. air filter: $25 from auto zone, dryer piping: $9 from home depot, under drive pulley: $20 off of eBay, new serpentine belts: $25 from advanced auto, exhaust tip: $40 off of eBay and had friend install for free, and glow gauges: $19 off some website.
Modified by swimshark at 3:58 PM 12/4/2007

[StevieRaySTL]

-- They are Kumho ASX AS, 215/50s all around, I'm very happy with them. So you're saying that the intake wasn't laying on the ground in that side shot? And you're blinker's where? The lower grille? I couldn't really tell from pics, my monitor is dark. Doesn't that make the front asymetrical, or did you move the other one too? I don't think that the dryer vent setup is right for me, but more power to you for being original. I'm thinking of maybe doing something like the stainless or aluminum piping, my mechanic does custom fab intakes and I'll bet it would be less than 650-900 bux, just not sure about the unequal length.

[swimshark]

yah it was laying on the ground cuz the piping isnt stiff. towards the corner of where the original blinkers are, i used a zip tie and attached the blinker bulb through one of the holes that one of the bolts goes through on the stock blinkers. since i did both side the same way they look symmetrical. i took the grill from the wrecked J30 i had and cut it up to put it in the hole where the original blinkers are. yah dryer duct seems weird to most but it works great. thing sounds like a beast and has great power.

[swimshark]

here is my clean engine bay

[yodawill2000]

Any issues driving in the rain ??Seem's the filter would get a bit soggy.

Nice fab job !

[swimshark]

with the other filter i did notice when i would floor it it would have a weird pulling feeling, but with the new air filter i have yet to feel that.

[MWES]

I'm new and I didn't know exactly where to post but I just got some 350Z wheels for my J30 and they bolted right on with no rubbing. 225 45 r18 in front and 245 45 r18 in the rear. My GPS shows it knocked the speedo out by a mile and a half at 65mph which I don't think is too bad.


Modified by MWES at 7:52 PM 12/5/2007

[StevieRaySTL]

-- Those look nice. I think the six spoke design works well on the J30, makes for a more aggressive stance, like the Impala SS or Mercury Marauder. Are your center caps Nissan or Infiniti?

[swimshark]

if you were running 17" you would want to have a 45 wall. since they are 18" you will want to knock it down to a 40 or 35. this will help fix your speed offset.

[Skapunk4everr]

All i am going to say about Wu1x's intake is this.Infiniti spent a long time engineering the intake system on the j30( or any car for that matter). The fluid dynamics are very important, and you think they are trying to rob the engine of power by making this intake? They are looking to find the most power while retaining reliability. If i were you, I would leave the intake alone except for maybe the filter element itself(and possibly the CIA)

[StevieRaySTL]

-- I wouldn't mess with the CIA, the FBI or the ATF. Heheh. Seriously tho, mine and Wu1x's aren't really CAIs, they are cold air filters. I agree with you to an extent, but you have to take into consideration that the J is a a luxe mobile and a good amount of engineering was probably put into noise redux as well. It's his car I guess, so to each his own. I'd like to custom fab one with equal lengths to the throttle bodies but with a greater dimension, so I agree with Wu1x to an extent as well because I believe there is potential for power and sound increase in that area.
Modified by StevieRaySTL at 10:47 AM 12/19/2007

[Skapunk4everr]

I do agree with you on that aspect, but the problem is sure it makes it sound better, but is there truly any reasonable gain out of it? If we had a dyno to run a few test on it that would be great and i bet we could figure out what actually works best. Im not trying to scare anyone out of trying it out, im just putting my opinion in.