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Texas speed headers

ChevyTrucks_95

By ChevyTrucks_95
in Engines & Drivetrain

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jrob56 Enthusiast

jrob56

Posted
Posted

Cold Start:

 

 

 

Sounds pretty good, try the GM Borla next so I know what it sounds like ha.

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

 

Sounds pretty good, try the GM Borla next so I know what it sounds like ha.

I would love to, but no way I'm paying retail for it :)

 

I'll keep my eye on CL.

 

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ChevyTrucks_95 Enthusiast

ChevyTrucks_95

Posted
  • Author
Posted

Cold Start:

 

 

. Are you still having issues with the clearance of the Y pipe? Also do you still have check engine lights from running no cats or did you tune them out? Overall, are you happy you got them and did you find any performance gains besides sound?
Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

. Are you still having issues with the clearance of the Y pipe? Also do you still have check engine lights from running no cats or did you tune them out? Overall, are you happy you got them and did you find any performance gains besides sound?

You pipe occasionally touches the crossmember. I put a couple hours into it, I can't get any more clearance. I'm going to notch out a small piece. Should be an easy fix, and won't threaten the strength of the crossmember.

 

CEL is gone now that I had the tune updated to tune out the rear cat readings. The CEL from no cats.

 

With that said, I haven't had the tune adjusted yet for the headers for anything else. I have an appointment on June 15th with my tuner at the Dyno.

 

I'm happy overall, worth the price I paid.

 

I'll report back on performance once I get the tune updated.

 

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  • 3 weeks later...
Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

Fixed the Y Pipe rubbing today, just cut out the corner of the transmission crossmember bracket.

 

f6623afc765fe43b73c15054feb35081.jpg

 

1c9a0aeeab19d68a2a4958ae810a5358.jpg

 

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  • 2 weeks later...
Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

Gains from Texas Speed Headers with Catless Y Pipe.

 

cc3e6199f8adc3cbc196740de736d688.jpg

 

 

 

 

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L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

Headers on a truck that you dont want to race and use for daily commuting and towing is pointless. All your gains from headers are up top 4k+ and you gain horsepower not torque. The exhaust manifolds are designed to produce low end torque for towing in truck applications, not high rpm horse power. Not to mention your truck will be loud as hell and annoy you towing on the interstate. If i had a 2wd sport truck and went to the track or the street i would run headers. A commuter and a tower? No way in hell, but to each his own. There is a video of a blue 6.2 all terrain on youtube with kooks and borla and its so loud the microphone gets distorted at idle. Check it out, sounds mean.

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

I don't know if I'd go as far as pointless, but I do see your points as the majority of the gains are above 4k.

 

However, gains are gains no matter the platform. Performance guys like gains. If there were losses of hp or tq anywhere, then yes, it'd be pointless. However, as you can see, this is not the case.

 

I can tell you that with the OEM cat back with the headers, it will not be loud.

 

Even with the OEM cat back and borla muffler (resonater still in place) with headers, my truck is not loud at all.

 

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jrob56 Enthusiast

jrob56

Posted
Posted

Yeah no losses anywhere so not pointless but has me rethinking if I'd do headers. Less gain than I expected.

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

Yeah no losses anywhere so not pointless but has me rethinking if I'd do headers. Less gain than I expected.

I wish my comparison was apples to apples, but it's not.

 

Old numbers were also based on 3" exhaust with only a Flowmaster muffler.

 

New numbers are 2.75" exhaust with Borla muffler and stock resonater.

 

Also, both of these are e85 numbers on my truck that was already tuned. One last variable was the first dyno was done in cooler temps as well.

 

So, lots of factors. I'd fully expect someone to gain 20-25 on apples to apples comparison on back to back dynos.

 

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L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

While you will gain HP all the way through, In many cases you actually will lose torque between 1500-3000(normal towing rpm range) Not sure about the Ecotec series, i recall seeing testing done somewhere, engine masters or similar. Ill see if i can track down the episode. But as i said it probably wouldnt be enough of a loss to even notice 5-10lb ft maybe.

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

No torque loss on my charts.

 

As long as you tune for the headers, I think it's a win win.

 

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Txjose Senior Enthusiast

Txjose

Posted
Posted

While you will gain HP all the way through, In many cases you actually will lose torque between 1500-3000(normal towing rpm range) Not sure about the Ecotec series, i recall seeing testing done somewhere, engine masters or similar. Ill see if i can track down the episode. But as i said it probably wouldnt be enough of a loss to even notice 5-10lb ft maybe.

Clearly no loss of tq on his chart. If anything he gained a few HP down low. This is what i have been telling people but some refuse to listen even with charts. Different engines respond differently to headers. Once you remove the stock manifolds and see how restricrive they reallllyyy are it all makes sence.

 

Hopefully i can get mine on a dyno soon. Tuner and i are aiming for 400 to the wheels all motor..... WITH 33s

 

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L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

What else have you done to the truck? Most 6.2's put down 320-340. Even bolt ons and custom tune will have a hard time getting to 400 no? Best of luck, let us know how it works out.

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