Just dynoed my car @ 387rwhp

[GTS-t VSPEC]

I expect the cams may make the biggest difference, what size are you going for?

[Sydneykid]

Hi guys, comparing maximum power at one single rpm point is a waste of time. Tell me the average power over the useable rpm range, now that's something meaningful.

Let's compare this R33 GTST..................

At 7,000 rpm it has 310 rwkw

At 6,000 rpm it has 250 rwkw

At 5,000 rpm it has 195 rwkw

At 4,000 rpm it has 93 rwkw

That's an average of 212 rwkw.

With this R32 GTST..........

At 7,000 rpm it has 280 rwkw

At 6,000 rpm it has 250 rwkw

At 5,000 rpm it has 200 rwkw

At 4,000 rpm it has 160 rwkw

That's an average of 223 rwkw.

Ignore the weight difference for a moment, which car is going to be faster? The R32 gives away 30 rwkw (11%) max power but I know it's faster (times prove it) and that's because it's average power is higher.

Hope that adds to the discusion

[GTS-t VSPEC]

Sydneykid, I totally agree with what your saying, maximum power is irrelevant, hence the reason I get mine tuned for a nice fat power curve and not top-end power. We reduced the top-end power in mine and gained substantially in the mid-range, and that's the type of car I'd much rather drive:D

[RS500]

tune definitely plays the biggest part when coming to producing power & torque.

this is where the secret is to extracting power from the engine.

[GTS-t VSPEC]

RNS11Z, Is it worth considering a retune with someone else?

[RNS11Z]

It sure is. I am thinking about it though my mechanic has been really great with the work they have provided me and the prices they give to. I dont want to break that friendship barrier we have though i am sort of looking else were for a dyno tune.

[GTS-t VSPEC]

You don't have to tell them your going elsewhere;)

[RS500]

Originally posted by RNS11Z

Well considering i dont have cams and cam gears, once i get the bigger injectors and bigger fuel pump 440rwhp will be easyly made. The reason why i had to use such high boost to get the power levels its at now is because of my fuel problem. If i were a mechanic.. hey id solve the problem myself and tell you the reason why its not making so much power.. but im not so thats just the way the cookies crumbles.

RNS11Z,

the above doesn't make sense to me in that u had to run more boost b/c of your fuel problem.

i hope your tuner didn't tune your engine by retarding the ignition timing and winding the boost up as to get power without detonation.

If so, you are definitely not allowing the engine to run efficiently and make the power it should on lower boost, so i'd look at getting the engine tuned again with more timing and lower boost as to suit the amount of fuel that your injectors/pump will flow.

[RNS11Z]

Just an update, Im putting bigger injectors in it next week and another fuel pump. Then it will go back onto the dyno. Will keep it posted once i get the figures

[GTS-t VSPEC]

Cool, hope you can make the same figure with less boost:D

[redline2003]

how much do garret gt35/40 turbos cost becoz i hear they r excellent for their price

[RNS11Z]

For those who are curious, I just found out that the injectors in my car, which i was told and believed were to be 550cc, are actually standard. Goes to show how much you can trust a reputable builder hey!!!

650cc injectors will be installed tomorrow. Will keep you posted with dyno figures.

Cheers

Harun

[DoughBoy]

That's a pretty good result. 387 Rear wheel horsepower from a six cylinder motor with 370cc injectors is a very efficient use of fuel.

[Simonster]

Hurry up and post your duno printout, I'm interested to see it

[Guest INASNT]

Originally posted by RNS11Z

For those who are curious, I just found out that the injectors in my car, which i was told and believed were to be 550cc, are actually standard. Goes to show how much you can trust a reputable builder hey!!!  

650cc injectors will be installed tomorrow. Will keep you posted with dyno figures.

Cheers

Harun

u cant be serious, 6 x 370cc injectors and 280rwkw dont add up.

u r kidding yourself if you think they are the stock ones.

[Mighty Highlights]

Just a question why are you guys making well over 300rwhp and only doing mid 13 sec 1/4's? Shouldn't you be getting mid 12's with that much power.

"13.5@104mph, 368rwhp More than Troy "

104 is a very low mph for 368 rwhp.... whats going on here? Dynos can lie, but the track doesn't.

[sidewaymambo]

Driver, traction....etc....see some got got mid 12 and high 11..see the sticked post....

Originally posted by Mighty Highlights

Just a question why are you guys making well over 300rwhp and only doing mid 13 sec 1/4's?  Shouldn't you be getting mid 12's with that much power.  

"13.5@104mph, 368rwhp More than Troy "

104 is a very low mph for 368 rwhp.... whats going on here?  Dynos can lie, but the track doesn't.

[Sydneykid]

Hi RNS11Z, if you car is making a genuine 290 rwkw on standard injectors then you better call the the Pope 'cause it's a miracle. Either that or the fuel pressure is way over the top.

Is it possible that you have a set of hi flowed standard injectors? They look the same and most people don't remove the part numbers when they hi flow them, which is very dangerous. I have seen the result when someone with a set of hi flowed injectors replaces one with one of the same part number (not hi flowed). Very large melted lump that sorta looks like a piston.

Hi sidewaymambo, weight is important too and tyres are the most important, not to mention driver skill. Comparing 1/4 times to judge a cars horsepower is almost as useless as comparing different dynos.

Fun thread this one

[Steve]

I think you will find that the 1/4 time posted by GTSt VSPEC and the rwhp that is quoted is seperated by a fair break in time. Since that 1/4 the turbo was upgraded, thus the apparent inconsistancy.

[RNS11Z]

Well i was very shocked to find out it was standard. We did back to back testing with another set of standard GTST injectors from a vehicle which was producing 340rwhp and they flowed exactly the same. This guy is also on the forums (the person who i was going to sell my injectors too), he too can vouch for em.

I will post a copy of dyno figures once i get the new injectors in the car and tuned which will be very shortly.

1/4 mile times, well i will be out racing at jamboree so, we'll see how good i can drive and how good my tyres are.