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Cut out: Any one ever ask this?

This is a discussion on Cut out: Any one ever ask this? within the External Engine forums, part of the LSx Technical Help Section category; I used to have a 2001 SS. I had a cut out installed on the exhaust and loved how loud ...

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    Junior Member Tom's 99TA's Avatar
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    Cut out: Any one ever ask this?

    I used to have a 2001 SS. I had a cut out installed on the exhaust and loved how loud it was. But I guess due to the lower back pressure it used to sound funny when the automatic transmission shifted. The throttle response did not feel quite the same either. Instead of having the cut out opened all the way, has anyone fabricated a plate that goes on and covers up the opening lets say half way? If so how loud is it, how is the throttle response and what about back firing?

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    Here for entertainment 502ci's Avatar
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    Yes an electric one, you can adjust it while driving in increments.

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    Junior Member Tom's 99TA's Avatar
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    I didn't know the electric one could be partially opened. I figured it was either open or closed. What is the cost of an electric one installed?

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    Here for entertainment 502ci's Avatar
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    I installed it myself . I`m sure a million responses are on the way , it seems to be a hot topic

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    Junior Member Tom's 99TA's Avatar
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    Well I had the manual one put on my car for around $80 dollars at the time. I could modify the plate to get a happy median for all items listed earlier. The difference in cost I guess would be the only thing I am wondering now. How do you like the electric one?

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    The Herpes of LS1.com Modulistic's Avatar
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    the electric cutout replaces the plate that bolts over your cutout.

    I dont see hwo restricting exhaust flow will increase HP or TQ though.

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    Here for entertainment 502ci's Avatar
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    QTP and DMH are two brands, I have the DMH and love it , Just bought my dad a 3" one for christmas for his 87 grand national it was $189.00.

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    Junior Member Tom's 99TA's Avatar
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    Quote Originally Posted by Modulistic
    the electric cutout replaces the plate that bolts over your cutout.

    I dont see hwo restricting exhaust flow will increase HP or TQ though.

    I agree with what you are saying, I would only want to restrict it back partially due to back firing that I heard when I had it on the SS. And the loss of power it seemed at lower speeds. Unless my car was the only one that ever seen this?

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    Senior Member mrr23's Avatar
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    nope, not the only one. i used to have a QTP electric on my car pics here. did some track testing and found out some things. the low end grunt you 'seem' to be missing really isn't there. yes, on the dyno i gained 11/13 AFTER 3000 rpms. it's under 3000 rpms that you don't see on a dyno. here's my track testing results. CLIFF NOTES: lost 60ft to gain mph with no difference in ET.

    Now here's results of my exhaust endeavors. This is with 200 n2o. the stock vs cutout was same day.

    distance --- stock --- cutout --- cutout colder --- Bassani
    60ft ------- 1.987 ---- 2.074 ------ 2.020 ---------1.969
    1/8 -------- 7.902 ---- 7.912 ------ 7.990 -------- 7.739
    mph ------- 93.20 ---- 93.97 ------ 92.16 -------- 98.60
    1/4 ------- 12.102 --- 12.080 ----- 12.191 ------- 11.814
    mph ------ 117.12 --- 118.06 ----- 118.20 ------- 121.35


    NA times

    distance --- stock --- cutout --- cutout colder --- Bassani
    60ft ------- 2.033 ---- 2.073 ------- 2.031-------- 2.044
    330ft ------ 5.788 ---- 5.822 ------- 5.759 ------- 5.723
    1/8 -------- 8.808 ---- 8.833 ------- 8.729 ------- 8.656
    mph ------- 82.33 ---- 82.55 ------- 83.70 ------- 84.27
    1000ft ---- 11.404 ---- blank ------ 11.278 ------ 11.196
    1/4 ------- 13.606 --- 13.636 ----- 13.449 ------- 13.345
    mph ------ 101.66 ---- 101.58 ----- 104.05 ------ 105.15

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