PTUNING: 501WHP 377WTQ 20psi Stock Motor PTUNING Spec-SS GTX3076R Turbo System

[DriftEightSix]

Originally Posted by ptuning

So we finally got around to dyno tuning our PTUNING FR-S with some corn juice. Although, we would have definitely made more power with E85, the numbers we achieved with E67 were pretty fantastic. Trying to find true E85 in the DMV area this time of year is nearly impossible.

Please note that, as always, all the dyno numbers that we post are uncorrected Dyno Dynamics dyno numbers. A Dyno Dynamics Dyno reads roughly 10-12 percent lower than that of a typical Dynojet.

With that said, here is what we tested:

Ecutek ProEcu RaceROM w/Flex Fuel enabled
PTUNING Spec-SS Turbo System with GTX3076R upgrade
PTUNING FR-S/BRZ Fueling Package (FIC 770cc)
PTUNING DS-333 Modular Polished T304SS 3" V-Band Turbo-back Exhaust System, 4" Tips (Dual Mufflers)
PTUNING Spec-RS 4-to-1 Equal-Length Race Header - Polished T304SS, Double-slip Racing Merge Collectors - (Prototype, In-development)
PTUNING Spec-RS Flex Fuel Return-Style Fuel System w/Racing Swirl Pot & Walbro 485LPH fuel pump - (Prototype, In-development)

Things to note:

- We always dyno our cars through the supplied air filter/intake and out the exhaust tips. No filter-less turbos, cutouts, dropped exhausts, etc.
- We also retained our standard included recirculated WG dump tube set-up. We'd expect our dump to atmosphere WG option to gain another 10-15whp at this power level.
- Our analog DD Dyno uses a standard 4:3 screen vs some newer 16:9 monitors. Keep this in mind when commenting on the shape of the power curve compared to dyno printouts that are landscape view.

180+wtq by 2.5k rpms
215+wtq by 3k rpms
260+wtq by 4.5k rpms
Usable power up to 8k rpms

Other dyno numbers we achieved during our dyno tuning session:

355whp 254wtq at 10.5psi on 93 pump gas
384whp 291wtq at 10.5psi on E67

We'll post our dyno videos on Monday and hopefully a street vid sometime next week, weather permitting.

- Toan

Can we see the polts for the 93 tune?

Do you know what rpm you reached full boost?

[cdrazic93]

Originally Posted by JuniorAWD

Nice, can you post the graph showing the CF on it?


Basically you are saying this GTX30r is making 400whp on a dynojet on 10.5 psi and 93 and 560ish on 20psi e85?

20 psi on E67. Or is there much of a difference in hp numbers between E67 & E85?

[Blown_xa]

Originally Posted by JuniorAWD

Nice, can you post the graph showing the CF on it?


Basically you are saying this GTX30r is making 400whp on a dynojet on 10.5 psi and 93 and 560ish on 20psi e85?

Ill let the tuner chime in, but the 355 was a small typo. I believe it was 335whp, still rather impressive . Previously the pump gas tune netted around 320whp, but the addition of the PTUNING header bumped up the efficiency and even allowed for more timing. As far as correction factors, PTUNING will never implement a correction factor.

[slicktop]

Good work guys. Advancing the platform is really coming along fast. I think daily 400whp is easily sustainable for the long haul (5+ years) IMO.

[xwd]

I don't suppose you have an actual log of boost pressure?

These dyno plots with the "double hump" effect are interesting. At first glance it looks like a really laggy turbo but you are still making quite a bit more torque than stock even at lower RPMs.

[kidgogeta]

Originally Posted by Blown_xa

Ill let the tuner chime in, but the 355 was a small typo. I believe it was 335whp, still rather impressive . Previously the pump gas tune netted around 320whp, but the addition of the PTUNING header bumped up the efficiency and even allowed for more timing. As far as correction factors, PTUNING will never implement a correction factor.

they said their dyno reads 10-12% lower too, so does this means it'll be close to 375 at the wheels on a dynojet? That's the highest number I've seen on pump gas on 10ish psi

[jamesm]

Originally Posted by kidgogeta

they said their dyno reads 10-12% lower too, so does this means it'll be close to 375 at the wheels on a dynojet? That's the highest number I've seen on pump gas on 10ish psi

if it's not a dynojet, you can't make that assumption. they're calibrated by the end user, so they can read whatever they want just like a mustang. i think what they mean is that in the default configuration they can be expected to read about that low and that theirs is configured in that manner. but comparing numbers across dynos (or really even comparing numbers to begin with) doesn't buy you much. there are just too many variables to gain any useful insight from doing so. dynojets are the only dynos that can't be configured to read wildly differently (without a correction factor printed on the readout), which is exactly why they're the yardstick of the industry.

in any case it's damn impressive, and that's really all that matters.

[ptuning]

Sorry guys, I finally got a chance to get to computer. I guess with so many numbers included in my original post, I fat-finger typed the pump gas whp. I guess you can say the pump gas numbers were sort of the red headed stepchild in my post. I was more focused on the E67 numbers.

I'll go through and answer some of the questions that were asked, but before that I wanted to go over dyno differences.

I know the, "our Dyno Dynamics Dyno reads 10-12 percent lower than a Dynojet" comment gets thrown around a lot and people can take it for what it's worth, but I'll give you some things to consider. You can draw your own conclusions.

We'll use three examples here, all from well known reputable tuner shops.

The examples here all use our very efficient low-mount S2000 turbo system running a GT3076R and GTX3076R turbos.

This AP2 S2000 runs our GT3076R turbo. During tuning, my best dyno pull on our Dyno Dynamics dyno was around 431whp at 13.5psi. The customer randomly showed up to a local Inline Pro dyno day a few months later and made 475whp on their Dynojet dyno, even with improperly gapped plugs that he just dropped in at the last minute.



Here is a dynograph of a GTX3076R that we tuned running Q16 and 22.5psi.



Here is a dynograph and video of a GTX3076R tuned on E85 by Full Blown running 18-19psi.



[ame="http://www.youtube.com/watch?feature=player_embedded&v=cdQ3_lidK64"]s2000 E85 570whp tune Fullblown Motorsports - YouTube[/ame]

Here is a video of a GTX3076R running 93 pump and direct port WMI tuned by Evans Tuning on their Dynopack hub dyno.

[ame="http://www.youtube.com/watch?feature=player_embedded&v=7OUIIwDQLjI"]Honda S2000 w/ PTuning Kit - 580whp / 445tq - Hondata FlashPro - Dyno Video - YouTube[/ame]

So as you can see, there is a reason why it's an accepted industry fact that Dyno Dynamics dynos read lower. Sure there may be a few shops out there that use false correction factors on Mustang, DD, Maha, Dynocomp, and Dynopack dynos to sell product. We always choose not too.

[ptuning]

Originally Posted by Zach3794

Is that still the exedy stage 1 clutch on this car?

At 400whp and 300wtq, our Exedy Stage 1 never skipped a beat, so we're still not sure what it's final holding capability are. However, we didn't want to waste time with the clutch being a potential issue so we installed the Exedy twin-plate clutch.

- Toan

[ptuning]

Originally Posted by TRD_07

Was the gtx3076 using the 0.63 or 0.86?

We use the 0.63 AR Tial V-band turbine housings on all of our FR-S/BRZ turbo systems.

- Toan

[ptuning]

Originally Posted by DriftEightSix

Can we see the polts for the 93 tune?

Do you know what rpm you reached full boost?

We'll revisit the 93 pump gas tune once we burn off all the E67. Unfortunately, I did not bother to dial in the midrange (cam timing, etc) on 93 with our race header until we made the fuel switch. Once we have an optimized 93 pump gas tune in place, I'll post the final graph along with a boost curve.

- Toan

[ptuning]

Originally Posted by dwx

I don't suppose you have an actual log of boost pressure?

These dyno plots with the "double hump" affect are interesting. At first glance it looks like a really laggy turbo but you are still making quite a bit more torque than stock even at lower RPMs.

I'll try to get together a boost log soon, but I'd prefer to do so once we have our EBCS in place of the manual boost controller. I prefer initially tuning with a MBC to speed up the dyno tuning process with our development car.

The funny thing is though that some people will get so fixated on a boost curve rather than just looking at the torque curve, which is all that really matters in the end.

- Toan

[ptuning]

[ame="https://www.youtube.com/watch?v=f6j-VF8cNIw&feature=youtube_gdata_player"]PTUNING'S FR-S 500HP dyno pull - YouTube[/ame]

[Zach3794]

Originally Posted by ptuning

At 400whp and 300wtq, our Exedy Stage 1 never skipped a beat, so we're still not sure what it's final holding capability are. However, we didn't want to waste time with the clutch being a potential issue so we installed the Exedy twin-plate clutch.

- Toan

I think it's safe to say that Exedy severely underrates their clutches' holding capacity at this point...lol