Had my cutout redone, super sexy metal work inside....

4

4DRHTRD

New member
This is a Sound and Performance boost activated cutout seen here:
http://www.spracingonline.com/store/SP_Exhaust_Cutout_3%5C___Boost_Activated_/3673

When over 6psi the cutout opens up - here's my video on it working on my stock downpipes with a bad H pipe install and on 91 octane tune at around 12psi. I haven't had a chance to test it yet with the new 23 psi tune. Previously this cutout picked up .2 and 2 MPH for me in the 1/4 mile in back to back testing. I like this versus a loud exhaust so I can have a quiet exhaust 99% of the time and loud when I want it.

http://www.youtube.com/watch?v=XT_zwVaXHwg

I had the work redone, it goes between the midpipe and the stock resonator, it replaces the 3rd cat. I had a vacuum solenoid installed so that when I don't want it to open the solenoid interrupts the vacuum/boost line to the cutout and stops it from opening.


0











 
Sexy for sure...... both visually, and audibly.  :hump:

Excuse me while I fap to it.  :smoke:

Bwahahahaha totally gross, but hey, wth.  :smiley-faces-75:
 
I had a Varex muffler on my STi which is a cut out but inside the muffler. I was really enjoying it. That might be the next best thing for my SHO...
 
Why boost controlled?

It seems to me like you'd be better off just having actuator to fully open or close it when needed.
 
I don't think you would need it unless you are boosting.  Otherwise it's quieter.
 
geswek said:
Why boost controlled?

It seems to me like you'd be better off just having actuator to fully open or close it when needed.
Click to expand...
Because under boost you want more power, I've set it up so that only when I need the power I have the power and I don't have to hold a button to open an electric cutout while I'm trying race. If you watch the video it shows all that fun happening. :)
Sound Performance Boost Activated Exhaust Cutout Results!!!
 
48whp just from an exhaust cut out?

I'm sorry, but I call straight bull cow pie on that one.

You should dyno before and after. I want to see this LOL.
 
geswek said:
48whp just from an exhaust cut out?

I'm sorry, but I call straight bull cow pie on that one.

You should dyno before and after. I want to see this LOL.
Click to expand...
I've done back to back testing at the track with my 91 octane tune on stock turbos, .2 and 2mph difference that's 20HP on nearly stock HP, the more boost, the more power you'll pick up. On my old Impala SS with electric cutouts I picked up 40HP open vs closed on my 175 shot of nitrous. I have extensive background with cutouts, and the power they pick up, it's no joke and you get to keep a mostly quiet car 99% of the time. But hey, what do I know, right? :)
 
4DRHTRD said:
geswek said:
48whp just from an exhaust cut out?

I'm sorry, but I call straight bull cow pie on that one.

You should dyno before and after. I want to see this LOL.
Click to expand...
I've done back to back testing at the track with my 91 octane tune on stock turbos, .2 and 2mph difference that's 20HP on nearly stock HP, the more boost, the more power you'll pick up. On my old Impala SS with electric cutouts I picked up 40HP open vs closed on my 175 shot of nitrous. I have extensive background with cutouts, and the power they pick up, it's no joke and you get to keep a mostly quiet car 99% of the time. But hey, what do I know, right? :)
Click to expand...

I'll vouch for this...I saw it in person...

Besides, the track times are where the real numbers are proven.  Dynos are a tuning tool and a **** measuring devise...that is all.  They can be a good base for proving parts, but there are WAY too many variables that can play into dyno numbers.  Could that 48 be inflated, sure. But if they couldn't load the dyno right, it may be low, who knows...turbo vehicles are especially problematic on dynos.

And PS, those are sexy!  I'd never put them on my car though, I hang them on the man cave wall!  :biggrin:
 
4DRHTRD said:
geswek said:
48whp just from an exhaust cut out?

I'm sorry, but I call straight bull cow pie on that one.

You should dyno before and after. I want to see this LOL.
Click to expand...
I've done back to back testing at the track with my 91 octane tune on stock turbos, .2 and 2mph difference that's 20HP on nearly stock HP, the more boost, the more power you'll pick up. On my old Impala SS with electric cutouts I picked up 40HP open vs closed on my 175 shot of nitrous. I have extensive background with cutouts, and the power they pick up, it's no joke and you get to keep a mostly quiet car 99% of the time. But hey, what do I know, right? :)
Click to expand...

Hmm, you know nothing -- we know this. ;)

I'll have to check that out.
 
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