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Got Over 400kw Atw?

T04GTR

By T04GTR,
in Engines & Forced Induction

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colinhunt
colinhunt

Let's not turn yet another thread into a discussion about your car, please.

Lithium
Lithium
SiR_RB
SiR_RB

Posted Images

XGTRX Veteran

XGTRX

Posted
Posted

Yep, pretty hard to actually race dyno graphs.......

My tuner told me once the only figure he cares about is the one on the podium.

Because race car!

This is my point. So really dyno tuning is for tuning not rattling off numbers. Real track numbers are the only ones that matter. So why do people waste their time asking for builds based on power numbers. Every car that I have ever modified I have never really cared about anything else except how it performs when I drive it or race it. Don't know. Must be getting old.

The Dan Grand Master

The Dan

Posted
Posted

This is my point. So really dyno tuning is for tuning not rattling off numbers. Real track numbers are the only ones that matter. So why do people waste their time asking for builds based on power numbers. Every car that I have ever modified I have never really cared about anything else except how it performs when I drive it or race it. Don't know. Must be getting old.

You can still base your mods/builds on power figures, but when you are using the dyno as the comparative tool rather than the track, the reality can sometimes be skewed. If you race against someone and they are 0.1 second faster around the circuit and you make X amount of hp, you then know you've either gotta make X + 50, get better suspension or tune the suspension or just get better at driving.

You're not old, you're just wiser. We are slowly educating our customers as much as possible but it's a slow task. If they ever leave here with a low power figure on the print out, we always tell them to drive it and call back if they are disappointed.....or run it down the 1/4 and compare it to their previous result.

It's just common sense really

HYPED6 Collaborator

HYPED6

Posted
Posted

After much reading I think the only way to settle this is a "Rate my fun Car Thread"

Show how much fun your having in your skyline and then it gets rated from 1 - 10 by your peers.

Maybe we could factor in how many kilometers the car does a year to show the true useableness of said car.

I'm pretty sure the 400kw thread can be locked now.

XGTRX Veteran

XGTRX

Posted
Posted

402kw 10.81et 131.36mph. As per 2wd dyno dynamics dyno.

So is it safe to say that to run these numbers this is the power you need?

Maybe we need to start multiple threads 9 sec cars, 10 sec cars, 11sec cars so people can post their times, mods and driving style. Just a thought

Lithium Grand Master

Lithium

Posted
Posted

So why do people waste their time asking for builds based on power numbers. Every car that I have ever modified I have never really cared about anything else except how it performs when I drive it or race it. Don't know. Must be getting old.

We tend to get used to what general effect x.kw on a familiar dyno has on the way a car goes. Case in point, I have been helping out with the tuning on a mates S14 track car - he has got weight down to around 1090kg and he figured that 250-270kw @ hubs on the local hub dyno would make more than sufficient to have an awesome amount of fun with it. From there we were able to work out that sweet - a "350hp" rated turbo, a stock SR20DET and E85 should work together fairly well together to provide somewhere in that territory. Again, it wasn't to create claims to show off on forums - it was just more the knowledge that the power figure on that dyno should be able to allow for a fairly reliable but quick car.

Who cares if it would be maybe "only" 230-240kw on a Dyno Dynamics dyno or 300kw on a dyno set up to inflate figures? We know that it would be a figure that it can be competitive and reliable on the track in the type of racing he wants to do as well as be fun to drive. This all comes down to the "Dyno is a tuning too" thing, you can compare between results on that same dyno and fine tune different aspects to suit your requirements.

XGTRX Veteran

XGTRX

Posted
Posted

We tend to get used to what general effect x.kw on a familiar dyno has on the way a car goes. Case in point, I have been helping out with the tuning on a mates S14 track car - he has got weight down to around 1090kg and he figured that 250-270kw @ hubs on the local hub dyno would make more than sufficient to have an awesome amount of fun with it. From there we were able to work out that sweet - a "350hp" rated turbo, a stock SR20DET and E85 should work together fairly well together to provide somewhere in that territory. Again, it wasn't to create claims to show off on forums - it was just more the knowledge that the power figure on that dyno should be able to allow for a fairly reliable but quick car.

Who cares if it would be maybe "only" 230-240kw on a Dyno Dynamics dyno or 300kw on a dyno set up to inflate figures? We know that it would be a figure that it can be competitive and reliable on the track in the type of racing he wants to do as well as be fun to drive. This all comes down to the "Dyno is a tuning too" thing, you can compare between results on that same dyno and fine tune different aspects to suit your requirements.

Spot on. its a tuning tool and the only relavence to its figures is when it needs to be used to modify the engine management computer to optimise engine efficiency..nothing to do with comparing to another dyno down the road.

Also in a street car engine power does not necessarily relate to how quick your car is. An example is when I was active on the ls1 forums there were cars running 0.5 seconds quicker down the quarter with 50 rwkw less, why, because of hi stalls and diff gears and rear suspension setups and all streetable not radical stuff AND a good healthy tune. In other words there cars were efficient for their purpose and drivers knew how to drive. Higher dyno HP really means nothing to me.

If I had to get an engine built (which I am) I say to my mechanic I want to run low 10s in my daily. He should tell me what he is going to do and how much and when. When I get it back and after run in or whatever he tells me to do.....I want it running low 10s and I don't care if its got 300 400 or 500awkw.

I know its a rant but hopefully it helps steer the younger crew into the older ways of thinking....pipe dream maybe

R32 TT Mentor

R32 TT

Posted
Posted

Standard weight 32 or 33 GTR / GTST that runs 129-130 mph has 400rwkw

That's based on everything from 1400-1450kg (3100-3200lb)

@ 1550kg (3400lb) it needs to be about 125mph

And lets not forget.. Driver could be anywhere from 70kg through to 120kg.. Tanks of fuel or empty changes things by another possible 50kg..

(not disagreeing with you by the way - just pointing out even this has a bearing on it)

Super Drager Mentor

Super Drager

Posted
Posted (edited)

My car with 120.8rwkw on Unique autosports dyno ran 14.58 @ 95mph (97.6MPH Best). 1450kg 300zx. Injector Duty Cycle at 85% approx 270cc.

Edited by Super Drager
The Dan Grand Master

The Dan

Posted
Posted

And lets not forget.. Driver could be anywhere from 70kg through to 120kg.. Tanks of fuel or empty changes things by another possible 50kg..

(not disagreeing with you by the way - just pointing out even this has a bearing on it)

Most definitely. Half a tank of fuel changes your mph by 1. Another 25kg around the belly can cancel that out too haha.

So us fat bastards need to race on 1/4 tank to be just as fast

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