Hello U.K. Z owners,

 

I would like to introduce myself. I am an owner of a 1991 300zx TT over here in the U.S. I love the Z car and am amazed at the toughness and quality that Nissan put into our cars. The performance that we can get out of the stock components that are now in my case 21 years old is amazing. Here is a list of my upgrades,

 

JWT ECU

JWT intake

Profec B Spec II

Dupree SS Downpipes

Cat Deleted 3 inch exhaust

Z-1 Larger intercoolers

60HP(44KW) NOS wet system

Mechanical Fan Delete--Electric Fan installed

One Piece Z-1 Drive Shaft

Clutch Master Stage 4

NGK Copper Plugs

Larger Oil Cooler

 

I am still running the original stock size 370cc injectors, turbos, and engine all with 120K miles.

 

Each year at the local dyno in our community we have a fund raising event for the Cancer Society. At the bottom I have provided a link of the video the organizer of the event posted of the two pulls from my Z last Sunday. First pull cleaned out the intake and exhaust with a nice puff of black soot at the start of the pull. Car is now idling and running smoother than ever, 22 psi and a 60 shot(44KW) of N2O is better than a treatment of sea foam any day...LOL.

 

The pulls spiked to 22 PSI and leveled out at 18-19 on my little stock turbos.

 

Peak HP 524(385KW) and 584 Torque foot pounds(unsure of correct metric conversion) with the nitrous which in the case of turbo cars added more than the rated 60HP(44KW).

 

This is with the original sized stock 370cc injectors, turbos, and engine all with 120K miles.

 

Nissan sure knows how to build them.

 

I would also like to add that you have a great board over here. It is a lot of fun reading forums from around the world that share a similar passion for the 300zx. Thanks for letting me join your forum.

 

Video of Dyno 524HP 584TQ

[ http://www.youtube.com/watch?v=mbEq-KMehAY ]

Welcome to the fourm ziggy and thats a powerfull 300 you have mate:thumbup1: have you any pics of that pearl white zed you have?

Welcome to the fourm ziggy and thats a powerfull 300 you have mate:thumbup1: have you any pics of that pear white zed you have?

I have a few. I will try and post a few up later. They are not the greatest.

welcome Ziggy.

 

Nice Z you have there! That certainly cleaned out the cobwebs lol.

 

Were not allowed Nos Here in the UK. I forget what US BHP converts to in British BHP. I think you use mechanical BHP vs Our imperial BHP. Not much difference, but intersting to see what your pushing on stock internals.

welcome :) and nice z btw not a lot of them pearl white in uk

welcome Ziggy.

 

Nice Z you have there! That certainly cleaned out the cobwebs lol.

 

Were not allowed Nos Here in the UK. I forget what US BHP converts to in British BHP. I think you use mechanical BHP vs Our imperial BHP. Not much difference, but intersting to see what your pushing on stock internals.

 

Yes that first pull certainly did clean out the cobwebs....LOL. It is now running and idling smoother than is has in a long time.

Welcome to the fourm ziggy and thats a powerfull 300 you have mate:thumbup1: have you any pics of that pearl white zed you have?

 

Here are a few pictures of the Z. I need to get a few better pictures done. These are pretty bad. The second one you can see the nitrous lines on top of the intake plenum with the braided hoses covered with black insulation to help it blend in with the rest of the engine bay. Kind of going for that stealth look...lol. In the third picture is my nitrous pressure gauge and purge button I installed in the ash tray bin.

 

 

 

 

Thats some good figures for some stock parts well done. Couple of things have caught my eye though is the JWT ecu a replacement chip or full ecu? I plan on using their filter kit on my build as i think they do some great kit.

 

Also i was under the impression that with stock tubs and stock injectors anything over 16 psi is getting dangerous as you will start detting due to the the injectors not being able to supply the fuel.

 

As well i didnt think Nos was illegal in the UK Ryan just hardly anyone uses it due to increase in insurance and not warranting it. If it is illegal then i better hide the bottles in my boot install :D

i was going to say i been using it for 3 years now ...

and insurance is fine with it :)

and I'm gonna report my dentist for using it too! :lol:

Thats some good figures for some stock parts well done. Couple of things have caught my eye though is the JWT ecu a replacement chip or full ecu? I plan on using their filter kit on my build as i think they do some great kit.

 

Also i was under the impression that with stock tubs and stock injectors anything over 16 psi is getting dangerous as you will start detting due to the the injectors not being able to supply the fuel.

 

As well i didnt think Nos was illegal in the UK Ryan just hardly anyone uses it due to increase in insurance and not warranting it. If it is illegal then i better hide the bottles in my boot install :D

 

You are right about the stock injectors and stock turbos. Without the wet N2O set up I would only be able to pull 350-375 hp on my stock turbos and 370cc injectors because I would only be able to boost around 16psi before it would lean out. This wet system also allows me to push the turbos to their max even with 370cc injectors because of the extra fuel that is delivered through the wet system. The cold nitrous negates the extra heat that usually would cause the extra PSI to be of no gain when pushing these small turbos to their max. The 11.84 fuel ratio was the leanest I have ever gotten it during a dyno pull.

 

That sounds class. but i'm new to the whole dyno thing....whats the noise just before each run finishes? is it the dyno or the car?

How hard is it to run in a nitrous kit? I imagine it to work like fast and the furious, but is that a general misconception?

That sounds class. but i'm new to the whole dyno thing....whats the noise just before each run finishes? is it the dyno or the car?

How hard is it to run in a nitrous kit? I imagine it to work like fast and the furious, but is that a general misconception?

 

generally i think its set up to run on the rev, ie once you hit x amount of revs its automatically injected if its on. gotta get it set up proeprly though as if its not melted pistons etc and decreased engine life are in the books. best left to the professionals to fit. i think bobgiene has noz?

Stunning mate, I love a zed in white, especially with a type III front lip. More pics please :bow:

You are right about the stock injectors and stock turbos. Without the wet N2O set up I would only be able to pull 350-375 hp on my stock turbos and 370cc injectors because I would only be able to boost around 16psi before it would lean out. This wet system also allows me to push the turbos to their max even with 370cc injectors because of the extra fuel that is delivered through the wet system. The cold nitrous negates the extra heat that usually would cause the extra PSI to be of no gain when pushing these small turbos to their max. The 11.84 fuel ratio was the leanest I have ever gotten it during a dyno pull.

 

 

Ah yes of course i get ya now:) How do you have the Nos system activated is it on a continuous delivery at max trottle with a micro switch or button operated? I have a maximizer control unit to be able to set it up for length and percentage of delivery and all sorts so am interested as to how you have yours set up :) Thanks for the info

 

Marty

Stunning very mate very nice and super results on a stock engine. i would change the injetors though as they would be maxed out with that presure/bhp for saftey :)

can we have a look at the dyno plot see how the power band is :)

Ah yes of course i get ya now:) How do you have the Nos system activated is it on a continuous delivery at max trottle with a micro switch or button operated? I have a maximizer control unit to be able to set it up for length and percentage of delivery and all sorts so am interested as to how you have yours set up :) Thanks for the info

 

Marty

 

It is activated by a micro switch at full throttle. Your control unit sounds like a very good system. I would love to have the ability to control percentage of delivery. This would be very useful at the track and would really help with traction off the line. Starting with 50% delivery for the first 1 to 1.5 seconds of a run would allow you to put down power more consistently.

can we have a look at the dyno plot see how the power band is :)

 

I do not have a graph I can post. I can tell you how it plots. With the nitrous the cars peak HP and TQ numbers move down on the graph compared to a pull with turbos which move up on the graph as the RPM increase. The peak for my car is around 4200 rpm for TQ (584)and 4500 rpm for Hp(524). The numbers then begin to drop and at 5500 rpm the TQ is down to 450 and HP is 425. 4000 to 5500 Rpm is the power band. In the past at the track

I have always shifted at 6500 to 7000 RPM. In the future I plan on shifting at 5500 to keep the car in its power band with the nitrous. This should improve my .25 mile times.

I will try and get the graph so I can post it up.

ok just would of like to see ... i use Nos/Meth injection on my diesel car and i have been temped to put it on the Zed ...

but i'm using a Progressive controller ... its the best way .. i have tried micro switch and found it to be a little ... unpredictable

but then i'm using 150hp SHOT :)

I think progressive controller is a great way to go it just gives alot more tuning options and tweaks. That plus ive got a system to install capable of a 250 shot so kinda need to start low on the percentage :)