Iwan

As per title, stock GT35R, 1.06ex housing, 1.1bar boost (17PSI)....

Best REgards,
Iwan

Liborek

People around here aren't that comfortable with back calculated crank horsepower figures. Drivetrain losses during pull are entirely different than those during deceleration.

Power measured at wheels appears to be around 350 WHP and its hard to believe, well impossible, that drivetrain losses are worth of 150 HP

Nevertheless, give us more details about engine, fuel system etc.

dznutzuk

iTrader: (1)

We squeezed out 417 at 1.1bar to the rear wheels on a reputable mustang dynometer(w/out meth).

Knockers

check out my dyno sheet...

silverfdturbo6port

iTrader: (26)

dynos seem to be all over the place these days. lol

killahrx7

you guys are the funniest, first laugh of the day, thanks

G's 3rd Gen

iTrader: (11)

17 psi? aint gonna happen. 21-22 psi? Maybe. I will let you know soon. G

abc

Must be a very, very special 35R to produce that number.........

Jobro

iTrader: (2)

weigh bridge and terminal speed or get the **** out

that goes for ANYONE posting dyno numbers on this (or any) forum.

Jobro

iTrader: (2)

524BHP
435RWHP
326RWKW

Feasibly the peak mass through that system will be around 62lb/min choked by the turbine of the turbo regardless of what compressor wheel you use (GTX or GT).

Power should not increase much past about 20psi but torque will.

Iwan

Guys,

I was just about to share my figures with you, nothing else. The Dyno used is the one used by German car makers like BMW, Benz, Porsche, etc..... The Dyno maker is very famous over here, so the fugures you see, are the one you might see in a catalog of a new BMW M5. Same dyno- maker, same software and correction. To all the haters and non believers Fu*** you and learn to build engines and tune cars.

For the fuel.... 4x 850cc injectors at 3.5BAR base pressure were used. However, the injectors were running 100% which is not what I would recommend to anyone. The injectors were just back from cleaning and therm were flow tested at 920cc/min at 3BAR.

I would love to have you over here to get to the same dyno to compare as I seldom have seen figures on this forum related to the real RWHP. Many high HP figures I have seen here were SAE corrected so please be more polite to other sharing there numbers.

Thanks and REgards.

mannykiller

iTrader: (93)

sorry those figures are just wayyyy out there for me to believe anyways. especially on a 35R. Those may be the actual numbers you were given...but there's no way your car is making them. Never even seen a P/P turbo motor make those numbers at 17 psi.

Iwan

That is OK, and this is your opinion which is fine!
just one thing to think about... If someone is claiming to hit 500 with A-Spec kit, they are ppl. to believe. So become a believer or not, this is up to you, anyway.


Best REgards,

seandizzie

iTrader: (1)

1st- Are you trying to claim BHP or RWHP?

2nd- 372.5 kw= 499.5 hp.

3rd- Your curve looks horrible. Whats with the huge dip @ 7000rpm then jumps back up. I think you need to work on your tune.

Iwan

1st: nor the one nor the other! It says horse power using DIN70020.

2nd: not sure how you calculate, you need to multiply by 1.36 and you will get straight to 506.6

3rd: thanks for that, It has been corrected

madbouncy

DIN 70020 is just a correction method, the bhp or whp question is just him asking if the number is rated at your flywheel or your drive wheels. Since you said that the numbers are the same as manufacturers that would imply flywheel. Also, what brand dyno were you using and was it a chassis or engine dyno?

PS is metric horsepower which is a slight bit higher than imperical hp, hence the 506 vs 500

seandizzie

iTrader: (1)

1. So fly wheel guessing then...

2. As pointed out above. 506ps=499.5hp. You stated hp, not ps.

3. Glad you smoothed it out. Too muc fuel in the Injection map?

MOBEONER

iTrader: (18)

506HP, 356lb-ft on GT35R - 4x 850cc injectors @17psi?

I have a 66mm turbo 1000/2000 injectors so that mean i should be making around 800HP at 18psi in germany? cool i need to move!!

Iwan

Is that the American way? To have a huge turbo and plenty of fuel will take to NOWHERE without having other components to suit it. Getting power of an engine is a balance of many factors not just turbo and fuel...

For the Dyno, it is a MAHA dyno. MAHA Maschinenbau Haldenwang GmbH & Co KG - LPS 3000

Best REgards,

sk8world

iTrader: (5)

As long a you are happy with how your car drive is all that matters. If you want to show you are making a record amount then it will take more than a print out. If your car can trap 10.6 at 134mph then you have proof of a 500rwhp 2800lb manual car!

Liborek

I was skeptical but fuel consumption seems to match back-calculated power figure.

You should clarify that 506 HP figure is sum of wheel power and measured losses, with applied correction factor and represents flywheel power. What was actual measured power before correction?
Reason why I ask is that I did a bit of research on MAHA dynos, and 2wd vehicles of similar power level had drivetrain loss worth of 75 HP, your approaches 130 HP at 8k rpms.

Still, its very high power figure for given boost level. Is the engine ported? Give us more details and post whole dyno print out with ambient conditions, otherwise its just piece of toilet paper

darkphantom

iTrader: (2)

screw all the claims... that it to the track... then well see what numbers it produces

TougeSpirit

iTrader: (12)

Its also well known to be a Japanese "way" to run a large turbo but keep the car in the high rpm range.. but it all comes to down to purpose and preference. That's a very stereotypical comment I quoted above, and I'm not even "American". You'll find threads all over the forum of people who love the twins, a smaller turbo like the gt35r, and others running much larger turbos that are just as happy.

Second, you seem to be very "bashing" of other peoples comments although you say comments are welcome in earlier posts. When people post their hp goals and accomplishments on this forum, the common measurement is in rwhp so everyone can compare in a "standardized" way - like someone mentioned previously. They were probably just stating this as a suggestion to you to limit the amount of "flame" type replies in your thread.

And again, turbo choice, (SEE "HUGE TURBO/FUEL NEEDS @ TOP") is either A) dependent on their driving "style" or B) chosen for the purpose the car is being built whether it be modified twins for a more linear power band say for touge or a large turbo that throws down huge power in the top end that is more suitable for much more "linear" type driving. And of course, there is always option C) Where the turbo was chosen due to unknown/mislead/unsure etc reasons.. but that is a different thread.

Many many cars on this forum are built entirely from the ground up with every component from the front to the rear of the car being chosen specifically for their cars purpose, and then completely stripped down and rebuilt again after the owner finds out it didn't in fact suit their driving style or again the cars purpose - just check the build threads, some are hundreds of pages long with multiple tear downs and build ups.

You just received my first "feedback" rant on this forum, thanks

rcracer_tx

iTrader: (1)

Exactly, I'll believe those numbers when I see a trap speed to match those HP claims...

thewird

iTrader: (8)

Guys, why are you arguing? We all know the car isn't making 500 rwhp on a 35R at that boost level.

The car is making 351 rwhp according to the dyno sheet. Rad = wheel, which means rwhp. Car is slow for a 35R, end of thread.

You sir are extremely uninformed. Fuel directly relates to power. The more air your motor breaths in (via mods/setup), the more fuel its going to need which directly translates to power. More air = more fuel needed = more power (assuming tuning is equally optimal). It is impossible to make 500 rwhp on 4x850cc injectors as your only source of fuel.

I'd also venture to guess that the power spike at the end has to due with the motor leaning out up top from lack of fuel. Rebuild thread coming up shortly.

thewird