It Has Begun.........

[MBS206]

This car will also maul your stock turbo gtst on a circuit. At a 50hp shot you have 200+ seconds of full throttle power in a single 10lb bottle, thats quite a number of laps around most tracks in Australia. For a fairly stock street car that is as much as anyone really gets in a public session. The motor has a massive torque advantage for the same power. But, it's a moot point if the regulations of the track prohibit nitrous use.

Gotta come back to this.

Cara has found, she gets 5 dyno runs, and a few purges, and she's out.

But you claim 200seconds she should be getting, so lets say she got 8 dyno runs without purging, 25 seconds on the dyno seems aVERY long time, especially seeing how she was activating it at basically the halfway point of the RPM, so 40-50odd seconds for a dyno run...

One of you isn't adding up.

Adding to the full throttle power, that's the problem, Cara may make 170RWKW, but it's only capable of making it at flat stick, back off a bit, nitrous cuts out, she drops "50hp"

Back off in a Turbo R33, and you might drop 5-10KW.

The turbo is just WAY more useable on the circuit in its power delivery.

The turbo would be way more driveable, with no massive "kick" as you go from from nearly full throttle, to full throttle, a turbo can feed the power on alot nicer then what will occur. So basically, Cara can only pick up full throttle on the track once in a straight line, or fear spinning off with a sudden 50HP jump in power.

The whole problem with you basis of Cara's car being able to "maul" a stock R33 on a circuit (And we'll see what times she manages at the drags before commenting further) is that she has good linear power change, between part throttle, and full throttle.

Most race tracks are driven at part throttle, with full throttle really only being used on straight aways, which on most Aust tracks is just the main straight (Yes, small straights between corners, but even those you have to balance on the throttle alot)

Cara, also, so far, how much has the Nitrous kit cost you (Rough price), and how much does it cost each time you need to refill?

[Eug]

i do believe cara's bottle wasn't completely full.

[MBS206]

i do believe cara's bottle wasn't completely full.

From what I read, it was a full bottle, and had just been sitting for a year...

[MissR34]

okies lets clear up a few things here!!!!

when the nos was first used on the dyno (on the friday before extreme horsepower) the bottle was probably about 1/2 full and had been sitting around for a year, so i got 153kW i think it was.

then on the saturday of extreme horsepower, that morning i went and got the bottle filled, cost me $114 cos there was still some nos in the bottle left over, however i was told that the ratio of nos to air, was more air than nos, hence giving me a low kW reading on friday.

to fill the 10 pound bottle is $120. not too expensive, i think it is about $11.50 per pound or something like that.

on the cost of the kit itself, well ill keep that to myself!

but normally in total (including install) should cost near on $2500

[MBS206]

okies lets clear up a few things here!!!!

when the nos was first used on the dyno (on the friday before extreme horsepower) the bottle was probably about 1/2 full and had been sitting around for a year, so i got 153kW i think it was.

then on the saturday of extreme horsepower, that morning i went and got the bottle filled, cost me $114 cos there was still some nos in the bottle left over, however i was told that the ratio of nos to air, was more air than nos, hence giving me a low kW reading on friday.

to fill the 10 pound bottle is $120. not too expensive, i think it is about $11.50 per pound or something like that.

on the cost of the kit itself, well ill keep that to myself!

but normally in total (including install) should cost near on $2500

Thanks for the response Cara.

So, one last question, how long does a bottle last you of just doing runs (No purging)?

Have you tested this yet?

The other thing is, I'm struggling with the concept of having an issue of a bottle sitting around for a year.

Nitrous Oxide is rather stable, and it takes extreme heat and pressure to break down, so, there shouldn't be an issue, in a completely sealed gas bottle, sitting around for a year.

If it were not filled correctly, then I could understand.

Edit: Isn't the bottle ONLY filled with Nitrous Oxide as well, otherwise different mixtures from different places (Air to nitrous oxide) could cause you grief with mixtures changing etc.

Edited January 11, 2008 by MBS206

[MissR34]

i didnt have the bottle sitting around for a year, a friend did, i got the from them lol (now you know!)

so what conditions the bottle was in before i got it, i dont know.

I havent tested how many runs i get without purging as of yet. I will do that later down the track tho, when i get the 75 hp jets put in.

not sure how the air got in the bottle itself, but like i said i dont know what conditions the bottle was in before i got it. But the guys that re filled it for me just told me there was more air then NOS when they went to re-fill it for me.

[MBS206]

i didnt have the bottle sitting around for a year, a friend did, i got the from them lol (now you know!)

so what conditions the bottle was in before i got it, i dont know.

I havent tested how many runs i get without purging as of yet. I will do that later down the track tho, when i get the 75 hp jets put in.

not sure how the air got in the bottle itself, but like i said i dont know what conditions the bottle was in before i got it. But the guys that re filled it for me just told me there was more air then NOS when they went to re-fill it for me.

Sorry, I wasn't trying to find out where you got it from, LOL, I was more thinking allowed, trying to get a bit of discussion happening on it, I understand at a fairly good level how nitrous oxide works, but, I don't know the very fine details (like, how it's filled etc, air:n2o ratio etc)

I'll have to do some research on it.

One, slightly off topic question, but what is your fuel economy like in L/100KM?

[MissR34]

i get roughly about 100 kms per 1/4 of a tank so roughly 400-450 kms per tank

[rev210]

Gotta come back to this.

Cara has found, she gets 5 dyno runs, and a few purges, and she's out.

But you claim 200seconds she should be getting, so lets say she got 8 dyno runs without purging, 25 seconds on the dyno seems aVERY long time, especially seeing how she was activating it at basically the halfway point of the RPM, so 40-50odd seconds for a dyno run...

One of you isn't adding up.

Adding to the full throttle power, that's the problem, Cara may make 170RWKW, but it's only capable of making it at flat stick, back off a bit, nitrous cuts out, she drops "50hp"

Back off in a Turbo R33, and you might drop 5-10KW.

The turbo is just WAY more useable on the circuit in its power delivery.

The turbo would be way more driveable, with no massive "kick" as you go from from nearly full throttle, to full throttle, a turbo can feed the power on alot nicer then what will occur. So basically, Cara can only pick up full throttle on the track once in a straight line, or fear spinning off with a sudden 50HP jump in power.

The whole problem with you basis of Cara's car being able to "maul" a stock R33 on a circuit (And we'll see what times she manages at the drags before commenting further) is that she has good linear power change, between part throttle, and full throttle.

Most race tracks are driven at part throttle, with full throttle really only being used on straight aways, which on most Aust tracks is just the main straight (Yes, small straights between corners, but even those you have to balance on the throttle alot)

Cara, also, so far, how much has the Nitrous kit cost you (Rough price), and how much does it cost each time you need to refill?

I think you missed my humour....

170rwkw stockish skyline is a pretty nerdy circuit racer anyway you look at it, it's like comparing samples of poo for excitement value (massive appologies for any offence taken by owners of such cars)

* Question of Nitrous longevity;

100hp worth of gas in a 10lb bottle gives you about 100 seconds (50hp gives you around 200), it's not rocket science. In fact you can see this very question under FAQ I am sure for most manufacturers of nitrous kits, there are other questions you may find interesting answers to as well. Purging wastes a some gas of course but not a huge amount. I have had quite a few kits in my time and I am always suprised at how long a bottle lasts.

* Questions of racing circuit or drag;

As I mentioned the use of nitrous on tracks is not sanctioned (I didn't think people would take me seriously), as I mentioned its a moot point. However one can easily set up a kit to make it circuit friendly if it were allowed. Hidden 'Cheater' systems have been used controversially in circuit racing in the bad old days, particularly in the US. The massive torque nitrous provides means the motors spread of power gives you a large advantage.Again, I mentioned the circuit advantage only as tongue in cheek.

As for the strip, welcome to having your ass handed to you if you have the same power as a turbo setup, average power is king. Have a good hard look at why nitrous is popular in drag racing and you will see my point.

* Cost;

$100-ish for a 10lb fill lasts 100 seconds @ 100hp shot, it's by far the cheapest way to enjoy occasional street/strip fun. The setup requires very little at all by comparison to a turbo upgrade in terms of cost and suffers from no day to day normal driving compromises.

In short nitrous offers the best bang for buck street/strip upgrade, regadless of the consumable aspect.

Cara has a different approach and has mentioned the strip and show as her chosen areas of recreation, she really can't go wrong

Hope that adds to the discussion

[MissR34]

wouldnt a auto skyline beet me anyway?

[Eug]

i cant tell if your being sarcastic cara

auto will win consistency wise, yes.

[MissR34]

hehehe nah wasnt being sarcastic lol

was talkin to a mate and he has a r33 auto (has been modified) and was saying how he got his gear ratios changed

so if u can change the ratios for a auto, could u get them changed on a manual as well???

[Eug]

auto is normally preferred for drag applications.

what did he actually modify, the gear box ratios? or the diff ratios?

both are worthwhile drivetrain mods if you don't mind sacrificing in other areas. for example, if you swap to a shorter ratio you will accelerate faster but at a sacrifice for lower top speed.

useful for drag racing as you only travel 400m. for a street car it can be a pain if you wish to go on the highway, etc.

hardcore track cars normally have specialized ratios suitable for a particular circuit.

can be done for both manual and auto gearboxes. final drive ratio can also be changed, auto skylines have a shorter differential ratio to manuals, a simple mod for manuals is to throw in auto gears.

[MissR34]

not sure what he changed, just said he had it set up for drag racing.

and there is no way im changing my car back to an auto im having waaaay to much with it as a manual.