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Thread: replace stock muffler or?

  1. #21
    Opeler
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    Quote Originally Posted by terrylewisac View Post
    that's darn nice to.
    What does one give for a German shipment for all new exhaust? Just curios
    Can look it up here. OPGTS is out of stock right now at $899.00:
    https://opelgtsource.com/search/3284/details
    https://splendidparts.de/kaufhaus_2/index.php

    Gee, OPGTS located approx. 500 miles from San Diego.
    Would have to arrange an appointment with them to pickup if shipping is too high.
    Maybe schedule a camping trip up North in warmer weather?

    Think that Opels Unlimited might have them, also.
    Perris, CA is only 80 miles away with an easy Saturday drive.
    soybean and dpre like this.

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  3. #22
    2000 Post Club soybean's Avatar
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    Quote Originally Posted by Lindsay View Post
    Can look it up here. OPGTS is out of stock right now at $899.00:
    https://opelgtsource.com/search/3284/details
    https://splendidparts.de/kaufhaus_2/index.php

    Gee, OPGTS located approx. 500 miles from San Diego.
    Would have to arrange an appointment with them to pickup if shipping is too high.
    Maybe schedule a camping trip up North in warmer weather?

    Think that Opels Unlimited might have them, also.
    Perris, CA is only 80 miles away with an easy Saturday drive.
    Have you or anyone ordered from splendidparts? They offer several types of Exhausts here https://www.splendidparts.de/kaufhaus_2/Opel-GT/Auspuff. Which one would be the best of the 3 that are available? And what difference is the Comet 6A small flange and the Comet 6A large flange other than the obvious difference between flanges. Thanks, Jarrell
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  4. #23
    Senior Contributor Site Supporter opellane's Avatar
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    Quote Originally Posted by terrylewisac View Post
    that's darn nice to.
    What does one give for a German shipment for all new exhaust? Just curios
    Terry, I believe it is this one : https://www.splendidparts.de/kaufhau...amp;referid=67

    There out of stock right now... excludes the VAT tax... I think it was around $640 with Delivery ..
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  6. #24
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    Start at Page 3:
    https://www.opelgt.com/forums/genera...did-parts.html
    In 2014, ordered 3-row radiator. Shipping at that time was $90.00 to San Diego, CA.
    Used PayPal with my Checking / No Charge Cards Accepted.

    Quote Originally Posted by Lindsay View Post
    My Splendid parts ordered arrived Wednesday (2014) in San Diego.
    Excellent packaging with no crushed box and no damage to any parts.
    I had a question on the order and emailed Splendid/ Udo.
    Udo responded within two days to answer my question.

    (2014) Order required one week to process (after their vacation shutdown),
    and less than four weeks to arrive in California.
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  7. #25
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    Another German Supplier does not have the exhaust systems until Spring:
    https://www.pro-gt.de/de/?cat=c3_Aus...f.html&cPath=3
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    2000 Post Club soybean's Avatar
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    Quote Originally Posted by Lindsay View Post
    Another German Supplier does not have the exhaust systems until Spring:
    https://www.pro-gt.de/de/?cat=c3_Aus...f.html&cPath=3
    It and splendid parts are about the same in price. Stainless Steel is a good selling point too. I've got 285,000 miles on My Saab SPG and never had a problem with the exhaust. It too was/is stainless. Just ran out of other parts for it. Darn shame, that little 4cyl would run, esp with the turbo on it. Now she's parked. Jarrell
    You lose your dreams, you lose your mind. (The Rolling Stones)

  9. #27
    2000 Post Club soybean's Avatar
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    Quote Originally Posted by terrylewisac View Post
    Interesting guys Thank you,
    I put a glass pac on my v6 dakota and adjusted the carb to sound more like a v8.
    Seemed to work well in that application
    But a 4 cyl stock 1.9 opel
    First thing I told my son was no obnoxious rice burners in my garage
    If were to do something that's not stock it will need to be appropriate and ad to the harmonics
    Not just make it loud and ridicules
    If there's one thing I can't stand it's something loud and sounds like there may be something under the hood just to see it pull away so slow it can't get out of it's own way
    I stuck a "Glasspack" on mine a long time ago, but it doesn't have that "sound'' My Manta did. My sons 350 Z has the "sound" Really awesome ride to drive. I haven't got a ticket. Yet. Only a matter of time. Jarrell
    You lose your dreams, you lose your mind. (The Rolling Stones)

  10. #28
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    I just got my new stock muffler in Thank you Bob
    woo hoo still doing it original.
    I think I'm gonna add the flex pipe and the clamp at the rear
    sure will make much easier for me to attach instead of welding it
    I really liked that idea you guys did
    Last edited by terrylewisac; 4 Weeks Ago at 06:32 PM.
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  11. #29
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    exhaust back pressure Myth or is there some truth here

    Good Morning all,
    I 'm allowing my son to play with the exhaust while were working the rear end.
    He saw Kyler's video with the straight pipe set up as well as some of the posts here where exhausts were modified and begged me to let him play with it.
    So for now let the young man play Right? why not we have plenty of time and he is a part of the fun
    I was talking with a neighbor whom is wiser than I about engines & yada yada.
    I mentioned what my son is wanting to do and he went into this long rant/conversation about exhaust back pressure?
    I couldn't make heads or tales to what the heck he was going on about but I politely let him go on
    So I made a phone call after words to a friend whom's an engineer for Mitsubishi to get his thoughts
    He chuckled and said there is no relevance to or for any back pressure specially in your case on the exhaust side and simply said let breathe and exhale with the least of resistance
    And the idea of needing back pressure to the exhaust side was a hoax.
    Is there some relevance or reason that one might think that there is or isn't a need for back pressure?
    Again I'm not the smartest by no means about this stuff but I couldn't wrap my head around the idea of any of this
    Thank you in advance for your thoughts
    If you make it through an entire day and learned nothing you weren't paying attention

  12. #30
    Project 1450 supporter... Site Supporter RallyBob's Avatar
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    Quote Originally Posted by terrylewisac View Post
    Good Morning all,
    I 'm allowing my son to play with the exhaust while were working the rear end.
    He saw Kyler's video with the straight pipe set up as well as some of the posts here where exhausts were modified and begged me to let him play with it.
    So for now let the young man play Right? why not we have plenty of time and he is a part of the fun <img src="https://www.opelgt.com/forums/images/smilies/yup.gif" border="0" alt="" title="Yup" class="inlineimg" />
    I was talking with a neighbor whom is wiser than I about engines & yada yada.
    I mentioned what my son is wanting to do and he went into this long rant/conversation about exhaust back pressure?
    I couldn't make heads or tales to what the heck he was going on about but I politely let him go on
    So I made a phone call after words to a friend whom's an engineer for Mitsubishi to get his thoughts
    He chuckled and said there is no relevance to or for any back pressure specially in your case on the exhaust side and simply said let breathe and exhale with the least of resistance
    And the idea of needing back pressure to the exhaust side was a hoax.
    Is there some relevance or reason that one might think that there is or isn't a need for back pressure?
    Again I'm not the smartest by no means about this stuff but I couldn't wrap my head around the idea of any of this
    Thank you in advance for your thoughts
    You want zero backpressure, regardless of the engine’s state of tune.

    However, what is often lost in this translation is the fact that you don’t want to lose exhaust gas velocity.

    A 100 hp engine of a given displacement/design has lower exhaust velocity (and volume) compared to say, a 200 hp engine of the same displacement and design. So they will have different needs in terms of exhaust design and diameters.

    You need to balance the ’no backpressure’ versus ’maintaining velocity’ aspects.

    So while a 2.5” exhaust (for example) might be ideal for 200 hp, the flow advantages would not come into play until very high rpm’s on a 100 hp engine. This lack of velocity at lower rpm’s on the 100 hp engine would hurt performance during 95% of real-world driving.

    A good rule of thumb I’ve observed on most street driven CIH engines is to keep the exhaust at 2” unless you are making over 135-140 hp. Even a stock engine seems to run well with this diameter.
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  13. #31
    Senior Member terrylewisac's Avatar
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    Very good
    Thank you Mr. Bob
    If you make it through an entire day and learned nothing you weren't paying attention

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