quote Originally posted by unboundmo: Question---------- SLANT angle cut (this picture above). ----- or ------ STRAIGHT cut (like the drawing that I did in perspective)

I think slant like the pic above fits the car lines better.

quote Originally posted by 2.5: I think slant like the pic above fits the car lines better.

Agreed. Since the tips are angled up, I think the slant cut makes the ends more or less parallel with the rear of the car.

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Past:
1988 base coupe sold
1984 base coupe rust
Present:
1986 SE 2m6

quote Originally posted by unboundmo: Question---------- SLANT angle cut (this picture above). ----- or ------ STRAIGHT cut (like the drawing that I did in perspective) I'm leaning toward straight cut myself.. More race than show What would you all do?

IMO, the slant cut looks better. Makes for a larger, oval opening.

Slant

That picture's angle looks good huh?....

Yeah, I think if I were to angle cut the new tips I'll be making, it'll be the angle of these old ones shown in the picture above.....


-------- I don't know though.... That in-your-face raw look, straight cut still looks good to me.

Question-- and definitely debatable..


Is there a sound difference?

Theoretically, a sound wave travels through the opening perpendicular to the pipe..? Right?.. ( I'm just thinking the shape is like a gas bubble the diameter of the pipe--- blub-blub-blob-blab-bllub.. Like water bubbles merging to the surface?) The wave exiting will distort on a slant cut?.. Does this change the sound? Versus the sound wave exiting symmetrically perfect.

A soft lappy rumble versus a sharp lappy tone...?




----- one thing I think is cool is that my tone will be a little less hollow megaphoneish using the 3" versus the 3 1/2" pipe.. A TIGHTER hollow sound!--

Even though I haven't driven the car yet, I was figuring that I might have a constant droning low sound all the time. But My Fiero is a manual transmission so it won't be a fart can (making the sound effects when an automatic shifts and the car has a loud exhaust)-gutless sound.. Don't you hate that?..

[This message has been edited by unboundmo (edited 12-10-2016).]

Welcome Back! -----

..... A chance to get back at it, was all I needed... Therapy ---

-------edit to say that these tips didn't take 11 months to make... Just been super busy with other things

I have some updates... for those who remember the plans. The exhaust TIPS are now finished!... so let us continue with the thread

For starters, I made a template plate to stand the pipes in... (2) 3" circles spread 1/2" from each other on an aluminum plate.. I wanted to be sure that I always would come back to exactly where I was throughout the cutting / re-fitting phases.. You'll notice the plate in this first picture. Honestly, several fitting phases and 1 start over was not really in the plans.. but it's okay..









A WISE MAN ONCE SAID ------ ALWAYS! -- Polish your pipes before you tack.... so glad I listened





The ride home from The TIG welder... Sadly, I still don't have one..... yet 😏...




BLUbUBlUBlUBbLUB....





The NEW look





I'll post a couple videos soon... I went with the straight cut as you can see instead of slant (if you've been following from the start of the build)...There's just something about that raw cut pipe look.... sticking out at your face!

Cheers!

[This message has been edited by unboundmo (edited 11-27-2017).]

Purdy.
What model muffler is that too?

Hi 2.5.... here's the info. below

[QUOTE]Originally posted by unboundmo:

I chose a universal -- https://www.borla.com/produ...er_part__40842s.html

It measures 10" x 5" and 2.5" in/out dia

[This message has been edited by unboundmo (edited 11-21-2017).]

Cool, have a sound vid?

2.5..... Yes!... 😐 Just a couple of posts ago?...I have new exhaust tips too, in case you missed it..? Start from almost the top of page 3.. I added a bunch of pictures prior to the closure post..and if you would let me know if the links work.. That'd be cool. I don't know the [] [] bracket codes to embed them --- edit ---- (I re-read this thread again and saw to post the vids on YouTube in order to embed)

quote Originally posted by unboundmo: ... I don't know how to embed a video on Pennocks.. Sorry ---- please do so if you want.. know how to These are the links to the videos.. I have 2 for you.. HEADPHONES A MUST! https://www.flickr.com/phot...566@N04/36588316813/ https://www.flickr.com/phot...566@N04/37349236144/

[This message has been edited by unboundmo (edited 11-22-2017).]

A happy Thanksgiving to everyone!.....

---It's funny -- I just noticed another post on page 2 of this thread right now that says the same thing - from 2016 .. Time Flyies

.... I had the chance to upload the videos to YouTube for all to see.. everything is running tip/top verses the last video that I posted in this thread.. these are mostly just idling but at the end of this first video, is a little throttle pull.. I want to add that I think the 3" dual tip config sounds slightly different than the dual 3-1/2" tips that I had on before..but obviously it would.. slightly tighter in the hollow tones... I'm still getting a feel of position though.. I think that I'll tuck them in about an inch more than what you've been seeing in the last couple post.. I love the straight pipe look!... chime in if you'd like... let me know what you think?





Edited to say that the videos are there, embedded, but I can't see them on my phone.. in preview, however, they are there but not sure if you are having an issue as well.. maybe Cliff needs to review them before it gets posted? I used [youtube]....[/youtube].. please help.. thanks.

..... maybe it's just my phone.. need to update. I see it embedded on my computer..

Anyway..

https://www.youtube.com/watch?v=0XWtD0Zh2o0

https://www.youtube.com/watch?v=sTKTgSuknQg

[This message has been edited by unboundmo (edited 11-27-2017).]

Cool, vids work, sounds good, biger tubes always sound better to me, lower, curious how loud when you get on it.
Also what are your ground effects?

quote Originally posted by 2.5: Cool, vids work, sounds good, biger tubes always sound better to me, lower, curious how loud when you get on it. Also what are your ground effects?

It's definitely louder at full throttle.. crisp low tones but you know my foot is in it!

The ground effects are my creation from fiero junkyard part cars.. old exsisting GT skirts / and front bumper-- cut, reshaped and mounted upside down to the original... I felt that this will give me the look that I want but with the look of the factory lines.. What I think Pontiac would have done-- if they did.. I definitely didn't want to take away from the Pontiac styling.

With my drop and all, I sit roughly 3-3/4" off the ground with no bags and no rubbing.. and no added camber for clearances... I'll find a couple pictures and post them a little later.. easier to do on the computer verses the phone

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I've seen the nose done on quite a few cars now, I've not seen the rockers flipped as well, looks nice.

Not to jack my own thread.....












My secrets.....





Sprayed and finished by me!.... In my homemade 2/fan with filter 6'x12' garage spray booth... Worked great!

[This message has been edited by unboundmo (edited 11-24-2017).]

Cool stuff Ingenuity.

If you get a chance to record a revving/driving vid Id be interested. Picking Mufflers is hard! Does it drone at all in the car?

[This message has been edited by 2.5 (edited 11-24-2017).]

quote Originally posted by 2.5: Cool stuff Ingenuity. If you get a chance to record a revving/driving vid Id be interested. Picking Mufflers is hard! Does it drone at all in the car?

Thanks... and I'll try to get a video for you sometime soon... All I can say is.... that if you don't like the engine exhaust sounds, don't get this one.. it's present. Mostly always but the sound has different levels of volume per how much you step on it and also cruising... just cruising is nice... you still hear it, of course, but people that I've giving a ride, they don't mind at all and they say it fits my car..same when on the freeway.. not droning..and it's not obnoxious like the kids and their new mustangs running no CATs or four banger imports with fart cans... let's just say it's the radio 😜. it's a little race car with more of a muffler. I noticed that At 4000 rpm, it has a very subtle certain difference....then changes back at 4500 continuing up to 6k with my setup.. but more when I rev slower and in shifting than if I was WOT.. just sound waves traveling at different speeds.. it's definitely not due to tuning..the car runs superb ! I like it!... it's the fun car 🚗

[This message has been edited by unboundmo (edited 11-25-2017).]

Headphones a must please.. and for the full sound... see if this works!.. this is not full out throttle... just a nice feel for you all.. and sorry, no camera mount




For those who are on their phone and don't see the embedded video... here's the link

https://www.youtube.com/watch?v=mFt1o1c_gQg

[This message has been edited by unboundmo (edited 11-27-2017).]

SWEET!......

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Hope you all have enjoyed my thread... open discussion is definitely welcome.. and so far, it's been real fun!.... thanks for all the input from all.. Pennock's forum and the helpful people RULE!...😜

[This message has been edited by unboundmo (edited 11-27-2017).]