411rwhp from stock internals

[confak]

In my experience i have found that dynos often tell lies.

I beleive that it is only used for tunung and are very inconsistant in there power figures.

I have an r33gtst with I/c, 14psi standard trbo,air filter, 3inch exh turbo back.

1st dyno run @ PET: 198RWKW(14psi)

2nd dyno run @ club Meet: 170rwkw(14psi)

With these mods described above i ran a 13.8 1/4 mile.

Then

Installed Microtech plug in at PROMAZ

Dyno run @ Promaz: 165RWKW Although the car is a lot quicker then what it was with previous dyno runs.(14psi)

Hope that info can support why i think as i do about dyno power figures.

[GTS-t VSPEC]

confak, The dyno was run in shootout mode, and has just been checked by Dyno Dynamics for consistancy with there test dyno vehicle and found to be within 1% of the power reading on a 400rwhp vehicle. It is used by virtually every SAU member in WA, and reads lower than many other dyno's here. I'm expecting to get a reading of 450rwhp with the same setup at the dyno at the Perth Autosalon. I have used this dyno for all my work, I'm not swapping dyno's to try and get a high reading.

[GTS-t VSPEC]

Here is my dyno graph for those that are interested. The top two curves are the 411.9rwhp run, and my daily drive power curves. As you can see we're starting to get a bit of plug breakdown, so I have a new set of plugs going in. We are slowly ramping the boost, just to keep the pistons intact. We're running quite rich still just to protect the pistons, about 11.5:1 AFR's. It also has very little timing in at the moment, so when I put forgies in I expect the shape of the graph to be much fatter even with the same amount of boost.

[2rismo]

Adjustable fuel pressure regulators are a bit of a "band aid" really.

I can think of a good reason for owning one Roll on tomorrow!

Adrian

[GTS-t VSPEC]

It's saved me buying new injectors:D

[RS500]

VSpec,

what exhaust housing are you using?

also, how driveable/responsive is the turbo?

Sydneykid,

how extreme do u think the 600hp GT30 (with A/R .63 exhaust housing) would be on a cossie YB 2L? ;-)

[Guest INASNT]

paul

I am shocked, i recon u should pull your injectors off and prove to us that they are the stockies, coz even tho when you get your car from an importer u never know exactly what has been done to it in japan.

If u were getting only 80% duty cycle at 411rwhp using a few physics cals u r running atleast 550cc injectors.

Will be interesting when mine finially gets done coz i got the same manifold as you and getting a 550hp garrett turbo.

Also what correction numbers were entered in shootout mode before you did the run? coz you can very easily enter in the temp as being 35 degrees humidity 80% etc when it is alot less and hence u will get a higher reading coz of the correction factor.

[GTS-t VSPEC]

RS500, The 500 and 600hp GT30's use the same size exhaust housing, just different sized wheels. It's reasonably responsive and great for the street:D

INASNT, Send me some money and I'll take them out and get them flow tested:D Not many people would change the injectors to 550's on a completly stock car, but you never know. All the shootout readings are on the bottom of the dyno printout, which is the benefit of shootout mode, you get to see exactly what conditions it was done under.

[BU5TER]

Gotta love shoot out mode for that reason hahaha

[Guest INASNT]

paul

Your car might of had a big ass turbo on there with forged piston etc, then before it got imported to aus the turbo and other external bits were put back to stock. Dont laugh u never know what other goodies you might have in there,

[Steve]

Well done Paul, what a great result. What red line are you running? Also, was that a 4th gear dyno run? Nice wide power band too, a really nice looking dyno, time to buy some nittos:D

And I reckon the reason you are getting all that power with stock cams is because you have a trust plenum - flows so much better than the stocker obviously:p Have to see how mine goes with the new plenum:D

It is pretty awesome result esp with those injectors - all those out there that say it cant be done, one possible reason (might stop your brain hurting sydneykid:D):

I have heard that the stock injectors actually flow around 10% higher than their rating, so around 407cc/min, it is quite possible that the bosch pump actually flows higher than rated as well - a couple of pounds is not excessive AND the trust plenum actually flows really well at higher cfm when under boost.

See, not so incredible now is it.

Once again congrats Paul, nice work. I think you should get those a/f ratios around 11.8-11.9 though, still pretty safe and see if you cant get a few more ponies. At least you dont have to worry about killing the ringlands as forgies are going in.

[GTS-t VSPEC]

INASNT, I know a fair bit about what to look for on Skylines these days and I'm sure it wasn't ever modified:D

Steve, Thanks buddy. Redline is 7500, and it was a 4th gear run. I love the Greddy plenum, regardless of what other people say;) I don't want to push the car until I now I have the money for the engine rebuild, until then I'm happy with the safe fuel mixtures:D

[BU5TER]

What colour are the injectors?

I've also got a greddy plenum I think they're great

[RS500]

Originally posted by GTS-t VSPEC

RS500, The 500 and 600hp GT30's use the same size exhaust housing, just different sized wheels. It's reasonably responsive and great for the street:D

GTS-t VSPEC,

i do agree about the different compressor wheels although i believe that both the 500hp & 600hp GT30 turbo's come with an option of A/R .63, .82 or 1.06 exhaust housings.

http://www.turbofast.com.au/GTseries.html

[GTS-t VSPEC]

They have a grape colour, purple/grey look to them. There are other guys in WA getting 350rwhp on stock injectors too with only 70% duty cycle. Maybe our tuner knows some secret?

[GTS-t VSPEC]

RS500, Mine is the smallest one. I chose it for the better response.

[RS500]

that's cool. thanks.

when u say it's pretty responsive, when do u get the fullboost ruch?

i'd like to know how the 600hp GT30 would go on a 2L.

Anyone had any experience with one of these on a 2L?

[GTS-t VSPEC]

RS500, Depends what full boost is:D It's on 17psi by 4000rpm.

[B-Man]

What do they put in the fuel over there ? Damn that's a great result. Nice one Paul !

Cheers,

[RS500]

Originally posted by GTS-t VSPEC

RS500, Depends what full boost is:D It's on 17psi by 4000rpm.

that's pretty good response for a trubo of that size. it will be interesting when u can wind some more boost into it and give a nice aggressive tune