LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

15-20 RWHP with less than $200

Old Mar 22, 2006 | 08:50 AM
  #1  
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15-20 RWHP with less than $200

I ran a back to back dyno comparison of the Electric Cut Out opened and closed and i saw a difference of 15 hp everytime consistently and even in 2 different dynos. Also once so a increse of 19 rwhp. All this with a flick of a switch. All i can say is wow! It sounds awesome too, just watch out for cops. I think the simple fact that i have all those mods helped the power gain when opened then i also have a 3" cat-back allready so its on top of whatever the cat-back gave me. Maybe later on i might put the graph on. One of them you can see an increase of 34 rwhp but that was open and tunning.
Old Mar 22, 2006 | 12:42 PM
  #2  
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Re: 15-20 RWHP with less than $200

You got a cutout, an electric valve, and installation for UNDER $200?

-Chris
Old Mar 22, 2006 | 01:01 PM
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Re: 15-20 RWHP with less than $200

I ran back to back dyno's with mine, full stock exhaust and with the cutout open... The graphs kind suck because the dyno operator was shutting it down early because he didn't believe me when I told him to set the dyno to record until 162 in 3rd gear, and I only got to 5K (~140 MPH) on the first one and 5250 rpm (~150 MPH) on the next...

Full exhaust


Cutout open


*** EDIT *** changed text above to read beter...

Last edited by 1SlowFormula; Mar 22, 2006 at 01:07 PM.
Old Mar 22, 2006 | 01:10 PM
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Re: 15-20 RWHP with less than $200

Originally Posted by TransAm2k4
I ran a back to back dyno comparison of the Electric Cut Out opened and closed and i saw a difference of 15 hp everytime consistently and even in 2 different dynos. Also once so a increse of 19 rwhp. All this with a flick of a switch. All i can say is wow! It sounds awesome too, just watch out for cops. I think the simple fact that i have all those mods helped the power gain when opened then i also have a 3" cat-back allready so its on top of whatever the cat-back gave me. Maybe later on i might put the graph on. One of them you can see an increase of 34 rwhp but that was open and tunning.

I see you are running the Edelbrock Cat back just like i am your not the only one ive seen that gained 20 hp at the wheels with this cat-back using a cut-out. A guy on LS1tech said the same thing im putting mine on today after work and headed back to the Dyno to see the results
Old Mar 22, 2006 | 02:14 PM
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Re: 15-20 RWHP with less than $200

What cut out are you guys using? QTP?
Old Mar 22, 2006 | 02:22 PM
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Re: 15-20 RWHP with less than $200

also where is the cutout
before or after the cat
Old Mar 22, 2006 | 03:17 PM
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Re: 15-20 RWHP with less than $200

Mine was made at my local exhaust shop, cost me about $30 though and it's not electric, and is located right before the exhaust goes over the rear axle...
Old Mar 22, 2006 | 03:24 PM
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Re: 15-20 RWHP with less than $200

if you put it before the cat i bet you would see a few more hp
i had a fiend who had his at the end of his headers and it was a very very loud setup
Old Mar 22, 2006 | 04:52 PM
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Re: 15-20 RWHP with less than $200

19rwhp with a 200 dollar investment, not to shabby.
Old Mar 22, 2006 | 07:45 PM
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Re: 15-20 RWHP with less than $200

Awesome. I wonder what dual cutouts would yield...?
Old Mar 22, 2006 | 07:50 PM
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Re: 15-20 RWHP with less than $200

Originally Posted by Jeremy95TA
Awesome. I wonder what dual cutouts would yield...?
30rwhp. Makes sense to me!

j/k
Ryan
Old Mar 22, 2006 | 08:01 PM
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Arrow Re: 15-20 RWHP with less than $200

Originally Posted by 1SlowFormula
Mine was made at my local exhaust shop, cost me about $30 though and it's not electric, and is located right before the exhaust goes over the rear axle...
Me too. The shop that did mine didn't know what a cutout was even after I explained it, so they just cut a hole in the pipe and welded a 3" tube on that, then, welded a peice of collector flange to that. Then made some kind of strange cap for it. I have no reason to ever cap it though.
Old Mar 22, 2006 | 08:10 PM
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Re: 15-20 RWHP with less than $200

Hahah at first I thought that was his dyno the guy who started the thread with a CC306 heads and ported intake and i was like WTF is wrong with the car those numbers are like a bolt on only car ...

Then I realized the ywere from a bolt on only car lol
Old Mar 22, 2006 | 08:46 PM
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Re: 15-20 RWHP with less than $200

Originally Posted by HardcoreRM125
Hahah at first I thought that was his dyno the guy who started the thread with a CC306 heads and ported intake and i was like WTF is wrong with the car those numbers are like a bolt on only car ...

Then I realized the ywere from a bolt on only car lol
Yeah, sorry to confuse anyone, but figured I had the same experiance and had mine online already, I would back the guy up in case a bunch on nay-sayers got on this thread...
Old Mar 22, 2006 | 10:22 PM
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Re: 15-20 RWHP with less than $200

Some really nice numbers for you for what mods you have btw.

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