Question for guys who actually have the the Roush Kit

[Stage_3]

I have the following mods associated with the Roush P2 for 3rd Gen Coyote:

Boundary OPG & CS
Fore Lvl 2 e85 fuel system
Stainless W. LTH
Borla Switchfire
Griptech 2.8 Pulley
FI Interchiller Stage 2

My car made 803 rwhp and 760 torque.

I have no dog in this fight. (I own a stock RS3 P1 car.)
Just curious,....you have just those 6 mods and a tune and you're making over 800rwhp and 760rwtq?? Yeah, that's mighty impressive.

May I ask, who tuned your car?

 

[robvas]

I have no dog in this fight. (I own a stock RS3 P1 car.)
Just curious,....you have just those 6 mods and a tune and you're making over 800rwhp and 760rwtq?? Yeah, that's mighty impressive.

May I ask, who tuned your car?

Any blown gen 3 on ~14psi and e85 should do that

 

[engineermike]

I have no dog in this fight. (I own a stock RS3 P1 car.)
Just curious,....you have just those 6 mods and a tune and you're making over 800rwhp and 760rwtq?? Yeah, that's mighty impressive.

May I ask, who tuned your car?

I really think if he swapped the chiller for a ported blower he’d gain 80-100 hp based on similar combos. Also could have gotten by with way less fuel system.

 

[Hammerhead13579]

So....back to the topic of porting...

I read that the LT4 gains about 2psi from porting. So does the boost pressure change with the Roush 2650 after porting? Is this part of the reason why nobody seems to be doing this on stock(ish) builds?

I will give Kong & Jokerz a call tomorrow and see what they say about this blower and others for the S550.

 

[engineermike]

So....back to the topic of porting...

I read that the LT4 gains about 2psi from porting. So does the boost pressure change with the Roush 2650 after porting?

I have little data to support this but I believe so. The biggest bottleneck is where air enters the rotors so letting more air into the rotor pack should result in more boost.

And again, going by Autopart101's data, his peaked at 17 psi boost 7500 rpm and did 16 psi at 7000 rpm on the 2.7 pulley and boost is still rising with rpm. The unported blower on my F150 makes 13.5 psi flat on the 2.8 pulley, and that's with a 103 mm TB. If you want to compare these, the porting seems to be worth 1.5-2 more psi. However, as previously noted, the benefits are greater when you pulley down.

 

[The Watchman]

$3,000 interchiller is a hell of a "fix"

To have a PD blower which never overheats even in the dog days of summer?

Yes, $3k and worth every penny....imo

 

[The Watchman]

@robvas Lets do the math here. The rough cost of a Roush P2 for 3rd Gen Coyote is around $8,300 plus $3k for the FI Interchiller equals $11,300

The Gen 6 Stage 2 Whipple kit is $10k if you get the larger heat exchanger.

The Roush P2 kit plus FI Interchiller is actually a better deal because it literally NEVER heat soaks...whereas even a Whipple will pull timing under hot conditions...

Now, obviously the Whipple plus the FI Interchiller is an even better setup, but you are spending another $2k as well.

 

[Hammerhead13579]

I have little data to support this but I believe so. The biggest bottleneck is where air enters the rotors so letting more air into the rotor pack should result in more boost.

And again, going by Autopart101's data, his peaked at 17 psi boost 7500 rpm and did 16 psi at 7000 rpm on the 2.7 pulley and boost is still rising with rpm. The unported blower on my F150 makes 13.5 psi flat on the 2.8 pulley, and that's with a 103 mm TB. If you want to compare these, the porting seems to be worth 1.5-2 more psi. However, as previously noted, the benefits are greater when you pulley down.

Well on a stock car with the blower at 12psi if you went any higher you would run out of fueling, right? So then you couldn't see any benefits unless you upgraded fueling capabilities

 

[The Watchman]

I really think if he swapped the chiller for a ported blower he’d gain 80-100 hp based on similar combos. Also could have gotten by with way less fuel system.

Yes, indeed.

Nevertheless, I am in the planning stages of purchasing a forged Gen 3 Coyote short block. I have not yet purchased the block yet because I am working out the details and logistics for the install.

In that case, I am glad I have a Fore Innovations system already installed because we will probably be going with a 3.8 Whipple at that point...

 

[The Watchman]

@The Watchman

I mean no disrespect but please chill. I'm not on here trying to get advise for fully building my car and maximizing it's potential. I just wanted to know why people weren't porting their superchargers on stock tunes if they could get 45whp....
It looks like very few people are doing porting for the Roush 2650 so either they are missing out or it's not worth it and this claim is false...

No offense taken.

I guess my brain is in gear with all this information because I have researched every possible scenario for my current build to try and squeeze out more power.

So, I apologize if I am overwhelming you with information overload. Thank you for your patience with my OCD in this regard.

Good luck with your amazing car, no matter what direction you choose to go!

 

[The Watchman]

I have no dog in this fight. (I own a stock RS3 P1 car.)
Just curious,....you have just those 6 mods and a tune and you're making over 800rwhp and 760rwtq?? Yeah, that's mighty impressive.

May I ask, who tuned your car?

Juggernaut did the 93 octane tune

Ortiz did the e85 tune

 

[The Watchman]

Here’s a couple recent pics, enjoy!

 

[engineermike]

Well on a stock car with the blower at 12psi if you went any higher you would run out of fueling, right? So then you couldn't see any benefits unless you upgraded fueling capabilities

So this is an interesting subject that I've dug way too deep into.

The Roush kit uses the stock fuel pump and no BAP. Roush also leaves the stock fuel pump voltage caps at 12 volts, which is the stock values. You could very easily increase these to 15.2 volts and use the smart alternator capabilities to crank system voltage up under high fuel flow demands. The difference between 12 and 15.2 volts is the difference between 275 lph and 375 lph in the stock pump. An 18 volt BAP is worth 450 lph. We tried 22 volts on the stock pump and burnt it up, so I wouldn't recommend that.

I have an F150 Nitemare and I'm still on the factory stock F150 pump, 18v BAP, and stock Roush 47lb injectors. I'm actually running the 2.8" pulley, 103 mm TB, and E85 on this fuel system. It's pretty close to being topped out, which is part of why I haven't opted for a ported blower. Actually now that I think of it, I've figured out how to get a lot more port injector window which allows lower fuel pressure so maybe I could get away with a ported blower. Hmmm...

 

[robvas]

@robvas Lets do the math here. The rough cost of a Roush P2 for 3rd Gen Coyote is around $8,300 plus $3k for the FI Interchiller equals $11,300

The Gen 6 Stage 2 Whipple kit is $10k if you get the larger heat exchanger.

The Roush P2 kit plus FI Interchiller is actually a better deal because it literally NEVER heat soaks...whereas even a Whipple will pull timing under hot conditions...

Now, obviously the Whipple plus the FI Interchiller is an even better setup, but you are spending another $2k as well.

Well, and if you already had it it's easier than selling it and swapping blowers etc

 

[Hammerhead13579]

So this is an interesting subject that I've dug way too deep into.

The Roush kit uses the stock fuel pump and no BAP. Roush also leaves the stock fuel pump voltage caps at 12 volts, which is the stock values. You could very easily increase these to 15.2 volts and use the smart alternator capabilities to crank system voltage up under high fuel flow demands. The difference between 12 and 15.2 volts is the difference between 275 lph and 375 lph in the stock pump. An 18 volt BAP is worth 450 lph. We tried 22 volts on the stock pump and burnt it up, so I wouldn't recommend that.

I have an F150 Nitemare and I'm still on the factory stock F150 pump, 18v BAP, and stock Roush 47lb injectors. I'm actually running the 2.8" pulley, 103 mm TB, and E85 on this fuel system. It's pretty close to being topped out, which is part of why I haven't opted for a ported blower. Actually now that I think of it, I've figured out how to get a lot more port injector window which allows lower fuel pressure so maybe I could get away with a ported blower. Hmmm...

Wow, E85 without a return style fuel system? Impressive. So would you say a 2.9 pulley or 13psi is achievable and reliable with 15.2V change to the fuel pump on 93? And is this something that tuners would touch when getting more power out of these blowers? Because I got a custom tune and picked up 35whp on a mustang dyno