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> BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time...
Cairo94507
post Aug 14 2023, 07:45 AM
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I just am a huge fan of Chris' work. He must lay awake at night thinking of how to make stuff better; he does it and videos it so we can all learn. (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Aug 21 2023, 06:12 PM
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After unboxing the Ferrari shifter, the LS car seems a bit mundane. But...
Today was starting in on the new intake set up. As soon as I got it in place, I hated it and called to get return paperwork. It's a hard pass for me.
Yes, I could probably come up with an airbox that hides most of the boring horribleness, but I'm not even going to try.

But fear not! I have an even stupider idea for an intake that is far more costly and time consuming! (IMG:style_emoticons/default/av-943.gif)

Yes, I'm serious. Parts were ordered today.


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Cairo94507
post Aug 22 2023, 07:41 AM
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Looking forward to the next option; I completely agree on the hard pass on that one. (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Aug 25 2023, 11:05 AM
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Can't mess with the intake without messing with the exhaust. I've wanted to do a symmetrical exhaust so figured now was as good a time as any.
This is an inital mock up with some mufflers I had from an earlier version exhaust that just happen to bolt to the existing muffler bracket in a different orientation. I may use them, I may not.
In the end, I want the trans to be visible.


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tygaboy
post Aug 28 2023, 05:40 PM
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Coming along. The goal is to have this exhaust wrapped up in time for this Saturday's EASY meet. I'm waiting on the new mufflers and a couple mandrel bends. FedEx shows they arrive tommorrow. Fingers crossed...


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Maltese Falcon
post Aug 28 2023, 06:54 PM
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Chris, have you looked into any alum sheet metal style intake manifolds (plenums)? Wilson has a decent product for most of the late v8 Detroit engines.
This Wilson "Flying mailbox" is 1 of 12 made for LBP Cayenne race engines. Wilson aftermarket units do have lower profiles for the LS, Coyote, Mopar engines , so you can still see out your back window !
See you at 000 in September (IMG:style_emoticons/default/smile.gif)
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tygaboy
post Aug 29 2023, 06:51 PM
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Martin and I made a day of progress on the exhaust. This part was the trickiest as it's a complicated set of joints where everything has to end up in EXACTLY the right place. It's a sorta X-pipe/merge/crossover that happens on a sloped AND tilted radius.
Of course it does because: Style Points! (IMG:style_emoticons/default/wacko.gif)


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tygaboy
post Aug 29 2023, 06:54 PM
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Credit to Martin for coming up with the all the fixturing that helped simplify getting everything fit. There's the simple part: a flat plate bolted to the transmission mount. It served as the floor to set the height of the assembly, and it sports the centerline.
Then there's that wacky piece of scrap that we magneted in place and marked to give us targets for the piece as it was being cut and test fit.


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tygaboy
post Aug 29 2023, 06:56 PM
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You know you have a good fit when the piece just sits there with no support and no tacks. No, I'm not kidding.


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tygaboy
post Aug 29 2023, 06:58 PM
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Credit again to Martin for the fit he got on the "kiss", as we came to call it. This is the bottom - the side we couldn't see when it was being cut and fit. He's a remarkable fabricator... (IMG:style_emoticons/default/pray.gif)


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tygaboy
post Aug 29 2023, 06:59 PM
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And we finished the day with a rough cut of the ends. This is where the tubes get the other 1/2 of an S-bend and start heading straight back to the muffler inlets.
In all, a very productive day and I couldn't be happier with how this is turning out.


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East coaster
post Aug 29 2023, 08:01 PM
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Very nice……I can appreciate how difficult this was to get that fine of a fit!
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Cairo94507
post Aug 30 2023, 05:15 AM
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Amazing work. (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Aug 30 2023, 01:21 PM
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Necessity is a mother, all right! One for the tool whores.
Getting accurate mid-radius cuts really makes a big difference to how tidy the finished product looks. So we ended up making a couple different "scribe exactly to the center line" tools. Both are just a plate with two pins.
The big one (pins on the outside of the raduis) works on pretty much any size tube. Pins contact the tube and you mark in the slot. Note the pins can be moved to different locations to better fit various radii tubes.
The little one works from the inside of the radius. Pins contact and you mark for the cut on the outside edge. They work a treat.


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tygaboy
post Aug 31 2023, 09:40 PM
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First one side...


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tygaboy
post Aug 31 2023, 09:41 PM
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...then the other.
Yes, I know. I should just call it done and run them like this! (IMG:style_emoticons/default/aktion035.gif)


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tygaboy
post Aug 31 2023, 09:43 PM
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All that work and with the reverse-open trunk lid, you can't see it from this angle.
Now for the mufflers.


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Shivers
post Aug 31 2023, 10:42 PM
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QUOTE(tygaboy @ Aug 31 2023, 08:43 PM) *

All that work and with the reverse-open trunk lid, you can't see it from this angle.
Now for the mufflers.


Loud pipes save lives. (IMG:style_emoticons/default/biggrin.gif) looks sick
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Morph914
post Aug 31 2023, 11:45 PM
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Exhaust porn! (IMG:style_emoticons/default/popcorn[1].gif)
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twistedstang
post Sep 1 2023, 03:26 AM
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Beautiful work!
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