Remove the Discs!

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3/27/11, 01:59 PM

#101

4pipes

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Quote:

Originally Posted by s197ford

I would recommend drilling the original orifice plate hole in the butterfly valves (5/16") - that way you get factory sidepipe sound when the valves are closed (or you can drill it out a little bigger if you want it a little louder), and full sound level when the valves are wide open.

Maybe Ford Racing can incorporate that into their part since it is a Boss-specific item.

What will be the electrical source for the dump valve feature? Will it be able to be user installed or is there some nasty harness work required? I don't recall any power available near where the disks are located.

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4/16/11, 12:40 AM

#102

black_bullitt

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Don't know if this has already been mentioned or even tested yet, but I removed my discs tonight while the car was on the dyno and it was good for 4 extra rwhp. Went from bone stock cold run for 385 to 389.76 just from removing the discs! And it sounds beastly!! Best free mod ever!!

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4/16/11, 04:43 AM

#103

LQQK

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Quote:

Originally Posted by black_bullitt

Don't know if this has already been mentioned or even tested yet, but I removed my discs tonight while the car was on the dyno and it was good for 4 extra rwhp. Went from bone stock cold run for 385 to 389.76 just from removing the discs! And it sounds beastly!! Best free mod ever!!

Thanks for giving us an extra reason to go NAKED--->

Great News--->

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4/16/11, 06:37 AM

#104

MJockey

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Quote:

Originally Posted by black_bullitt

How many pulls did you do with and without the disks? It's not uncommon for the numbers to very 5 or more HP from run to run. Did you lose any bottom end torque?

Last edited by MJockey; 4/16/11 at 07:00 AM.

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4/16/11, 07:45 AM

#105

5 DOT 0

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Quote:

Originally Posted by black_bullitt

I'm not surprised by this, you're basically bypassing the mufflers taking the discs out. BTW those HP numbers are much closer to what I expected compared to the "Evolution" dyno pull.

Last edited by 5 DOT 0; 4/16/11 at 07:46 AM.

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4/16/11, 07:52 AM

#106

cloud9

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Quote:

Originally Posted by 5 DOT 0

I'm not surprised by this, you're basically bypassing the mufflers taking the discs out. BTW those HP numbers are much closer to what I expected compared to the "Evolution" dyno pull.

I had read there was backpressure with the discs in and that removing them should provide some gains. I wonder if it all flows out the sides, or if a muffler delete would produce even more gains. If it's mostly going out the sides with the discs out, then maybe a muffler delete would just put some of the noise out the back of the car without increasing overall noise.

Thanks for the info black_bullitt.

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4/16/11, 07:54 AM

#107

cloud9

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Quote:

Originally Posted by black_bullitt

Would you be able to post your dyno graphs? I'd be interested in seeing the power band for gearing on the track.

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4/16/11, 08:13 AM

#108

06GT

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POST THE GRAPHS HOLY CRAP HOW IS THIS EVEN NECESSARY TO ASK!?!?

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4/16/11, 08:14 AM

#109

5 DOT 0

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Quote:

Originally Posted by 06GT

POST THE GRAPHS HOLY CRAP HOW IS THIS EVEN NECESSARY TO ASK!?!?

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4/16/11, 08:18 AM

#110

06GT

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"I think some of us would like to view the results"

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4/16/11, 08:34 AM

#111

cloud9

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Quote:

Originally Posted by 06GT

POST THE GRAPHS HOLY CRAP HOW IS THIS EVEN NECESSARY TO ASK!?!?

Was just trying to be polite?

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4/16/11, 09:40 AM

#112

Dean#4AI

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Quote:

Originally Posted by 06GT

POST THE GRAPHS HOLY CRAP HOW IS THIS EVEN NECESSARY TO ASK!?!?

Not sure if you've had too much coffee or not enough.

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4/16/11, 01:12 PM

#113

black_bullitt

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Haha, I have the graph, I'll post as soon as I get on the computer. (posting from iPhone/iPad since last night). I also have video of the two pulls for sound comparison. We didn't hook up all the sensors though, so the graph doesn't have rpm readings or any of that, we simply pulled the car on the rollers while a buddy was swapping intakes for his dyno-tuning session and got in two quick pulls.

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4/16/11, 02:38 PM

#114

black_bullitt

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Here's the chart. Again, we didn't hook up any sensors, so unfortunately, no RPM readings. This was a pair of 5th gear pulls.

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4/16/11, 02:57 PM

#115

cloud9

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Must have done the pull in 5th gear?

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4/16/11, 03:02 PM

#116

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Do most do dyno pulls in 4th? Where's the rpm line?

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4/16/11, 03:11 PM

#117

Dean#4AI

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Quote:

Originally Posted by 5 DOT 0

Do most do dyno pulls in 4th? Where's the rpm line?

You pull from the 1:1 gear which is 5th gear on the Boss transmission.

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4/16/11, 04:32 PM

#118

cloud9

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Quote:

Originally Posted by Dean#4AI

the 1:1 gear which is 5th gear on the Boss transmission.

I keep forgetting that

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4/16/11, 04:42 PM

#119

2012YellowBoss

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Thanks Rich for posting! Can't wait to see some more of these with RPM's

So what are we realistically looking at in drive line loss for the Boss 13% 15% more/less ???