Whipple plus long tubes = ?

[The_Mad_Patcher]

Thanks. This is helpful. Were your Long tubes with or without cats?

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[Platinum_5.0]

This was without cats and yes it was definitely cooler temps. In the spring I'm going to be doing some back to back pulls and getting heat into the car and check the tune again so I'll see then how the numbers look.

 

[gimmie11s]

Too damn loud is my opinion lol.

But im turbo, so I digress!

 

[growler]

If nothing else they dropped boost pressure 2 psi on the gt500's everything else equal.. that's less strain on the engine for more power.....

 

[Platinum_5.0]

Too damn loud is my opinion lol.

But im turbo, so I digress!

I agree, it is ear bleeding loud...lol...I'll be adding resonators I think.

 

[PTM5.0]

2018 A10 Whippled catless LTH A10 here. You're not gonna get huge gains with headers and catless. I only did it to keep because I'm a standing half mile racer and do a lot of highway rolls. I didnt want to melt the cats down doing the long runs. If you do short runs (1/4 mile or less), the cost vs benefits of LTH isnt worth it.
I have the stock cat back and active exhaust so you can barely hear the car running in quiet mode.

 

[Platinum_5.0]

2018 A10 Whippled catless LTH A10 here. You're not gonna get huge gains with headers and catless. I only did it to keep because I'm a standing half mile racer and do a lot of highway rolls. I didnt want to melt the cats down doing the long runs. If you do short runs (1/4 mile or less), the cost vs benefits of LTH isnt worth it.
I have the stock cat back and active exhaust so you can barely hear the car running in quiet mode.

So where did I gain all my power?

 

[PTM5.0]

So where did I gain all my power?

Sorry, they just weren't worth much on my car over the factory manifolds and cats from what others have put down.

 

[Burkey]

So where did I gain all my power?

You gained some of it from the pulley swap obviously.
Outside of that, I’d be VERY suspicious of any dyno that suggests 800rwhp is possible from a Gen 3 without e85 and at least a 3.500” pulley at a minimum.

 

[Platinum_5.0]

You gained some of it from the pulley swap obviously.
Outside of that, I’d be VERY suspicious of any dyno that suggests 800rwhp is possible from a Gen 3 without e85 and at least a 3.500” pulley at a minimum.

Yeah and I kinda felt the same way but what am I supposed to think really? Same dyno, car dynoed 369whp stock. With the whipplW calibration on stage 2 and 3.75 pulley the car dynoed 681whp seeing 19.5* timing up top which I agree is agressive. I got a custom tune and made 709whp at 18* up top. Added 3.6 and longtubes and made 802whp at 19* at 8000rpm. 18.5* at 7400rpm. All same dyno.

 

[F1scamp]

Yeah and I kinda felt the same way but what am I supposed to think really? Same dyno, car dynoed 369whp stock. With the whipplW calibration on stage 2 and 3.75 pulley the car dynoed 681whp seeing 19.5* timing up top which I agree is agressive. I got a custom tune and made 709whp at 18* up top. Added 3.6 and longtubes and made 802whp at 19* at 8000rpm. 18.5* at 7400rpm. All same dyno.

Does the car trap around 140+? That's about what it should with 800whp and a stick.

 

[Platinum_5.0]

Does the car trap around 140+? That's about what it should with 800whp and a stick.

Never had it at the tack yet. I just got the longtubes and pulley on before the snow fell. In a garage now until spring.

 

[Burkey]

@Streetfighter Mustang
Given that you guys have fitted Whipple’s to MANY Aussie delivered cars, both with and without aftermarket headers, can you weigh into this with your findings?
For those playing at home, our RHD cars have even more restrictive headers fitted than your LHD cars. Eg. The gains we see in Australia will be even less for you guys.

 

[S550AC11]

Signature Speed just posted a before and after on a Whipple 18 with 3.87 upper with 20% lower. Before 865 hp 656 tq. After stainless works headers no cats was 917 hp 680 tq.

 

[moffetts]

"No cats" likely being a major contributor.

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