hi have just bought myself a black tt t-top long wheelbase 300 and am wondering what steps i should tune the car up in do i get exhaust filter and boost upgrade first or is it more compplexed then that?? ie will i need fuel cut defender or shall i just get some big injectors fuel pump and fuel controller ??

Hi .. welcome

 

Before you start in a big way I think you may find this useful.

 

http://www.300zx.co.uk/forums/showthread.php?p=302131#post302131

That guide is a good start, this question keeps coming up? perhaps we can all post up and decide on the best basic mods set up to get your motor going? then FAQ that too?

 

IMHO

 

Up the boost to around 12 to be safe around 15 if you are prepared for the possibility of the consequences

 

Then get a good zorst, I would say decat although other say it doesnt help hold your seals (less back pressure)

 

Then get a good air filter, I have a Blitz, they are the best flowing, but appaling at letting dirt and rubbish through in comparison to others, you cant go much wrong with a wire one, foam is good filtration but slightly less flow and needs replacing.

 

With the car breathing better and the upped boost you will notice it will seem like it is flying compared to stock.

 

Theres other things, like brembo upgrade on the brakes, and box upgrade if its an auto etc, these are not essential mods IMHO to get your car going. But are a worth while investment later on.

 

Im using boost jets to upgrade my boost although am looking at getting a boost controller of chris v soon. I have to say, I have had no problems with spiking etc and the boost hold well with the welding tips in place.

 

These are obviously my opinions so other ppl may differ, but I would say the above little lot is a cheap and easy was of getting your car on the move a bit more.

 

Good luck and happy Zedding!!!!

p.s I forgot, a chip is essential if your going on to mod and up the boost, cause the stock ECU doesnt have fuel maps for increased boost! Most will also up the rev limit and just make the car run better as a whole (if its a goodun) So you will need to invest in this for the whole zorst, filter, boost route if you take it!

Come see me and i'll work a package out for you :)

Bit OT ill be contacting you about them controllers matey when my redundancy cash comes through the door ;)

good man ;) :)

Talking of fuel cut defenders, why is it that if I boot it when the engine is cold (not a good idea I know, but sometimes necessary) it cuts out momentarily, is it supposed to do that?

AFAIK only the Z31 has a fuel cut? FCD's dont work on the Z32.

 

If a car has got a fuel cut, its like hitting a rev limiter in an old escort or something, really throws you forward and the engine will sounds nasty (loud banging or craking noise :S)

 

Not to sure about the cut out thing :confused: does it only happen when cold / on safety boost?

Yeah, it only happens when cold. It comes as a bit of a shock especially when you're trying to pull out of a junction :eek:

Could be temp sensor, TPS, or AFM.

 

Usualy AFM if its on its way out will play up after your cars been left over night / for a few hours and the car is cold. Moisture etc gets in it and then your car will start to hesitate slightly on pull of every now and then.

 

After a while and more moisture on it it will die, then you'll be stuck at under 3k rpm all the time and it will sound like a tractor.

 

Thats my bet.

p.s try and get someone close to you whos got a Z and swap the sensor, then give it a try!

 

Have you got a splash guard under your induction? if not water will be comming up from road and all ways onto it, thats a sure way of killing it. Also your filter being HKS and foam, they can soak up a shed load of water either way which isnt good at times. Take the pannel off and check for signs of water etc (dont know what the weathers like your end but weve had a fook load of storms down here seriously heavy rain!!!)

 

Anyways, back to the thread sorry for that hijack! (although i didnt start it lol ;))

300s DO have a kind of fuel cut! However FCDs are a BAD idea as they simply tell the ECU that less air is entering the engine than actually is, hence it will run lean. So fit a fuel computer too? Nah cos that simply adjusts the voltage from the airflow meter. The two will fight each other LOL

 

HOWEVER boost cut on the Z32 is very high boost and you'll have a job hitting it before other problems appear (such as holed pistons from running lean LOL)

HOWEVER boost cut on the Z32 is very high boost and you'll have a job hitting it before other problems appear (such as holed pistons from running lean LOL)

 

I'm sure they didnt have one? But I guess that'll be why ppl never seen it then lol ;) What sort of boost we talking about andy out of curiosity?

 

The S13's FC is like at about 12psi hitting thats like hitting a brick wall lol!

How ever much air is needed for 4.08v at the MAS. There is a value stored in the ecu which tells it the limit for airflow before taking measures to protect the engine - this corresponds to 4.08v......

How ever much air is needed for 4.08v at the MAS. There is a value stored in the ecu which tells it the limit for airflow before taking measures to protect the engine - this corresponds to 4.08v......

 

Doesnt it hurt knowing all lol ;)

I guess it could be dampness on the AFM, I have a HKS air filter u c. Thanks guys, sorry for the thread hijack also:)