New Turbo Kit Sneak Peek(Ptuning)

[ptuning]

We did some back to back testing with our PTUNING Spec-SS GT3076R equipped FR-S shop car running only a base 6psi 93 pump gas tune vs. a bone stock FR-S. Both cars are equipped with a 6-spd manual transmission.

We tested what we believed were some common day to day driving scenarios to show the versatility of our turbo system's powerband. These times were determined through careful examination of the acceleration videos that we'll be posting tomorrow. All acceleration runs were done on the same stretch of road for consistency.

PTUNING Turbo FR-S vs. Stock FR-S
3rd gear, 2-4k rpms: 3 secs vs. 6 secs
3rd gear, 3-5k rpms: 3 secs vs. 5 secs
3rd gear, 4-6k rpms: 3 secs vs. 5 secs
4th gear, 3-5k rpms: 5 secs vs. 8 secs
4th gear, 4-6k rpms: 5 secs vs. 8 secs
5th gear, 60-80mph: 5 secs vs. 9 secs

10mph rolling start to 100mph
*Note that this will be slower than a proper launch from a stop*
13 secs vs. 21 secs

[MooKz]

This is some interesting data.. Can't wait for the videos! From what I got with questions through PM's if I was to purchase the Tomei 80r exhaust the only downfall would be that the exhaust flow would dip to 2.5" exhaust to the 3" correct? Because of the use of the exhaust adapter right

[Lawnik]

Love the turbo placement and general setup of this kit. My only concern is running it on the stock header, is this wise in the long term due to the cat?

I would think the cat is going to start to fail and material could end up in the downstream turbo, no?

A header is easily added, but why not include it in all kits?

Is there a full package? Kit, ecutek w/tune, 3" exhaust, header, cutch and fuel

[SmsAlSuwaidi]

Originally Posted by ptuning

We did some back to back testing with our PTUNING Spec-SS GT3076R equipped FR-S shop car running only a base 6psi 93 pump gas tune vs. a bone stock FR-S. Both cars are equipped with a 6-spd manual transmission.

We tested what we believed were some common day to day driving scenarios to show the versatility of our turbo system's powerband. These times were determined through careful examination of the acceleration videos that we'll be posting tomorrow. All acceleration runs were done on the same stretch of road for consistency.

PTUNING Turbo FR-S vs. Stock FR-S
3rd gear, 2-4k rpms: 3 secs vs. 6 secs
3rd gear, 3-5k rpms: 3 secs vs. 5 secs
3rd gear, 4-6k rpms: 3 secs vs. 5 secs
4th gear, 3-5k rpms: 5 secs vs. 8 secs
4th gear, 4-6k rpms: 5 secs vs. 8 secs
5th gear, 60-80mph: 5 secs vs. 9 secs

10mph rolling start to 100mph
*Note that this will be slower than a proper launch from a stop*
13 secs vs. 21 secs

Y no 0-60

[andrew20195]

Originally Posted by SmsAlSuwaidi

Y no 0-60

Originally Posted by ptuning

common day to day driving scenarios

They were specifically trying to show the flexibility in more normal driving. Drag launches on the street (required for a good 0-60) aren't normal driving. Furthermore, 0-60 times are heavily influenced by gear ratios and number of shifts, not to mention the fact that their shop car has sticky aftermarket rubber compared to a stock FR-S.

Personally I feel 0-60 times are pretty much useless. For standing acceleration, 1/4 mile times are much more revealing, and the testing Ptuning has done here is quite useful and appreciated.

[SmsAlSuwaidi]

Originally Posted by andrew20195

They were specifically trying to show the flexibility in more normal driving. Drag launches on the street (required for a good 0-60) aren't normal driving. Furthermore, 0-60 times are heavily influenced by gear ratios and number of shifts, not to mention the fact that their shop car has sticky aftermarket rubber compared to a stock FR-S.

Personally I feel 0-60 times are pretty much useless. For standing acceleration, 1/4 mile times are much more revealing, and the testing Ptuning has done here is quite useful and appreciated.

I just felt like asking, if they had the time to do such timing, one or 2 launches would've looked cool. Plus you don't have to drag launch a car for a 0-60, a normal start w/ flooring it would do alright, it's not a drag strip. Regarding gearing, most people have their rev limiter up'd to achieve 60 in 2nd

[Mrc@ptuning]

Originally Posted by SmsAlSuwaidi

I just felt like asking, if they had the time to do such timing, one or 2 launches would've looked cool. Plus you don't have to drag launch a car for a 0-60, a normal start w/ flooring it would do alright, it's not a drag strip. Regarding gearing, most people have their rev limiter up'd to achieve 60 in 2nd

We'll get those performance data in more detail once we setup the VBOX.

In the mean time...here's the custom PTUNING cone filter for the FRS Turbo System.



MrC

[andrew20195]

Serious question for ptuning: Turbosystems controlled purely by wastegate spring pressure often have issues with boost spikes. What kind of spikes are you seeing, if any? If so, could this cause longevity issues for the engine. If not, what have you done to eliminate this undesirable trait?

[ecko04]

Originally Posted by andrew20195

Serious question for ptuning: Turbosystems controlled purely by wastegate spring pressure often have issues with boost spikes. What kind of spikes are you seeing, if any? If so, could this cause longevity issues for the engine. If not, what have you done to eliminate this undesirable trait?

Probably a manual boost controller with overboost protection programmed into the tune.

[sw20kosh]

Originally Posted by andrew20195

Serious question for ptuning: Turbosystems controlled purely by wastegate spring pressure often have issues with boost spikes. What kind of spikes are you seeing, if any? If so, could this cause longevity issues for the engine. If not, what have you done to eliminate this undesirable trait?

He posted boost plots in an earlier post. No boost spikes.

The only wastegates that I have seen be troublesome are internal wastegates.

[ecko04]

Originally Posted by sw20kosh

He posted boost plots in an earlier post. No boost spikes.

The only wastegates that I have seen be troublesome are internal wastegates.

I think he's referring to longevity. Perhaps on a new kit there may not be any, because everything is new, but over time spikes may occur. Even external wastegates can have boost spikes. I think he wants to know how this potential problem can be solved before it happens.

[sw20kosh]

Originally Posted by ecko04

I think he's referring to longevity. Perhaps on a new kit there may not be any, because everything is new, but over time spikes may occur. Even external wastegates can have boost spikes. I think he wants to know how this potential problem can be solved before it happens.

A wastegate is a spring loaded valve. If there is no spike initially when you install it there will be no spike down the road untill/unless that wastegate is malfunctioning/worn out. At that point you would want to fix it or get a new one.

I believe he is talking about unsatisfactory boost control of certain setups. Design/dimensions of the wastegated bypass system play a role in this. The design of this system has been proven to control boost satisfactorily judging by the supplied dyno and boost graphs.

[andrew20195]

Originally Posted by sw20kosh

A wastegate is a spring loaded valve. If there is no spike initially when you install it there will be no spike down the road untill/unless that wastegate is malfunctioning/worn out. At that point you would want to fix it or get a new one.

I believe he is talking about unsatisfactory boost control of certain setups. Design/dimensions of the wastegated bypass system play a role in this. The design of this system has been proven to control boost satisfactorily judging by the supplied dyno and boost graphs.

Thanks for the answer, that makes sense. I didn't see the boost curve in the original post, but found it by looking through the thread again.

However, a dyno pull from low rpm doesn't show what the boost does on quick shifts at higher rpm, when the turbo is already well above the boost threshold, which is more where my concern lies. If ptuning or someone who has the kit can either post or PM me some datalogs of a full throttle run, I'd be really interested to see them.

[Dephective]

If you are concerned with boost spikes running off wastegate spring, spend another ~$85 and get a boost controller for piece of mind. If they were worried about spikes, I'm sure that they would have addressed this in their car, as I doubt they want to grenade it. I will be purchasing one with my kit, its not that difficult.