SW headers, N/A cars - dyno tune or nah?

a_d_a_m

a_d_a_m

Four Door Ford Whore
I'm considering martyo's Black Friday deal on SW headers for the Marauder. Since I'm N/A with a Zack tune and probably will stay that way for a good while, I was going to buy the catted headers with the factory exhaust connection.

I've done some reading on the forums and I'm getting conflicting information, or maybe I'm just getting myself mixed up. Some posts indicate a possibility of a lean condition after the header install, other people say it's fine and the car simply won't be 'maximized' in terms of HP.

Also seeing folks fighting with the EGR - how bad is that?

Talk to me.
 
I don't think you need a Dyno tune, 2mercs has a SW system and he doesn't have a Dyno tune. You do need a tune as the O2 sensor is further away. Check engine will appear. 2mercs fought with cel for a bit, I think it got straightened out
 
Marty turned off my rear 02s. Think they installed the wrong ones at stainless works. If you're worried about install they offer that service at a flat rate I'm pretty sure.

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RubberCtyRauder said:
You do need a tune as the O2 sensor is further away.
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I'm not sure I understand. If the car already has O2 sensors, and they're in a different location (farther away) that would render the tune I already have obsolete?

(like I said, I'm f'n confused on this, haha)
 
Get the Headers and a new file from Marty. I deleted My EGR because the installer cracked it. Causing a rough, hot start.


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a_d_a_m said:
I'm not sure I understand. If the car already has O2 sensors, and they're in a different location (farther away) that would render the tune I already have obsolete?

(like I said, I'm f'n confused on this, haha)
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yes, pretty much..the O2 sensors are further back and changes the values/parameters. Best to send Marty a pm for better info
 
Be prepared to buy a new Xcal as I’m assuming the Zack tune is on an Xcal2.

Maybe ask Zack first as he may have already tweaked it for headers.

Plenty of WD40 on the EGR. I’ve yet to break/crack a tube.


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RubberCtyRauder said:
yes, pretty much..the O2 sensors are further back and changes the values/parameters. Best to send Marty a pm for better info
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Makes sense.

justbob said:
Be prepared to buy a new Xcal as I’m assuming the Zack tune is on an Xcal2.

Maybe ask Zack first as he may have already tweaked it for headers.
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Yeah, it's an old X2, had it since 2009. Don't think it's tweaked for headers...could be wrong.

Thanks for your input, everyone!
 
To spend the coin on LT's and not do a tune, seems counter productive to me, just my 4.6 cents. YMMV
 
Spectragod said:
To spend the coin on LT's and not do a tune, seems counter productive to me, just my 4.6 cents. YMMV
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I don't have the money to drop on headers AND a tune, especially around this time of year. It's not that it won't happen, just wouldn't happen right away. In the meantime, the sound would be a nice addition...
 
a_d_a_m said:
I don't have the money to drop on headers AND a tune, especially around this time of year. It's not that it won't happen, just wouldn't happen right away. In the meantime, the sound would be a nice addition...
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Call me tomorrow on my cell to discuss.

914-582-6262
 
Tune tune tune to take advantage of new flow characteristics. At the very least need the primary O2 sensor response time requirements increased to account slower system response due to lower gas temps. I installed "spark plug anti-foulers" (haha) for the secondary O2's to fix the catalyst efficiency CEL. Other than that, Im Eaton swapped so my $0.02 is really only worth like $0.015
 
"O2 transport delay" needs to be raised in the tune for optimal efficiency. Unless there's something wrong or you're already running on the ragged edge, it isn't mission critical. Talk to Marty, he'll steer you right! :beer:

dmjarosz said:
At the very least need the primary O2 sensor response time requirements increased to account slower system response due to lower gas temps.
Click to expand...


No, with LTs, it actually takes longer for the exhaust pulse that left the engine to get to the O2 sensor than in it's original position.. It's a distance thing. You can actually turn the O2 internal heater up if you want also.
 
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