Jump to content

My Custom 2.5 Inch Down Pipe


AWeb80
 Share

Recommended Posts

Got the pipe from here

http://www.speedwaymotors.com/p/5423,417_Side-Pipe-and-Exhaust-Hook-Up-Kit.html?itemNo=side%20exhaust

 

 

I live 10 mins from the warehouse ...... :high5:

 

25pipe1.jpg

 

25pipe2.jpg

 

 

 

 

Stock 3100 DP.......BARELY 1.5" inside Diam.........that is horrible....

 

 

mini-IMG_2358.jpg

 

mini-IMG_2363.jpg

 

mini-IMG_2364.jpg

 

mini-IMG_2362.jpg

 

mini-IMG_2361.jpg

 

 

 

 

Stock Flange ready to weld.........

 

mini-IMG_2370.jpg

 

 

 

Not much room there.....~1" either side...so my measurements had to be RIGHT

 

mini-IMG_2371.jpg

 

 

 

 

 

 

Now the ugliest welds in the world...........But I don't care, nobody will see them, they work, and I have the satisfaction of doing it myself....

 

mini-IMG_2372.jpg

 

mini-IMG_2373.jpg

 

mini-IMG_2374.jpg

 

mini-IMG_2375.jpg

 

 

 

 

 

 

Didn't take any measurements.....ran out of time...was too busy fitting and such to worry about that....

 

 

 

 

Here it is drying w/ the VHT High Temp Coating.....

 

 

mini-IMG_2376.jpg

 

mini-IMG_2377.jpg

 

mini-IMG_2378.jpg

 

mini-IMG_2379.jpg

 

mini-IMG_2380.jpg

 

 

 

 

 

Here it is installed.............................PERFECT FIT............that made my day great........

 

mini-IMG_2381.jpg

 

mini-IMG_2382.jpg

 

mini-IMG_2383.jpg

 

 

 

 

 

 

 

 

 

This is one of my fav mods......it opened up the mid and HIGH range like no other........4-6K RPM is just crazy......and 1/2 throttle off the line is effortless.....

 

I will eventually do 2.5" back to the Y and then 2.25 from the Y back w/ mufflers and a rez up in the 2.5"

 

I thought it would be pointless to do the larger exhaust w/ a DP that is 1.5" in Diam.....so this will open it up a lot when I get the full exhaust on.

 

 

 

 

 

 

 

 

Here is the vid of my doing some WOT's and Down shifts..........it is soooooooooooo loud now....I LOVE IT

 

 

Link to comment
Share on other sites

  • Replies 55
  • Created
  • Last Reply

Top Posters In This Topic

  • AWeb80

    13

  • BXX

    6

  • MonteCarloDude

    5

  • 19Cutlass94

    4

Wow, your down pipe does look soooo different from mine... What the hell was GM thinking??

 

BTW, ugly ass welds, but nice that you finally got it done and on..

Link to comment
Share on other sites

those welds ain't bad and if they don't leak then their doing their job so be proud that you didn't have to pay somebody else to do it. Awesome job. The car sounds mean as hell.... I need to do this to my car to make mine even louder.

Link to comment
Share on other sites

my 89 is still louder.. custom rust and rot ftw! I gotta learn how to weld... lol

I really like it though... just another reason for me to want your car... :P

Link to comment
Share on other sites

So any tips on removing the bolts at the flange? My donught gasket is leaking and I need to remove the bolts/springs to replace it, but I havnt taken to good of a look to see the best way to do it.

 

Sounds awesome by the way.

Link to comment
Share on other sites

So any tips on removing the bolts at the flange? My donught gasket is leaking and I need to remove the bolts/springs to replace it, but I havnt taken to good of a look to see the best way to do it.

 

Sounds awesome by the way.

 

 

Long extension from underneath with a u-joint type socket and a impact if you have it.. Which I know you do..

 

I wanna step mine up, but I am gonna get a stock one from the JY first and take it to a shop to have them follow it as a template and of course, it will be done in stainless...

Link to comment
Share on other sites

i know my 96 dohc had a 2.5" dp stock. the pipe did have some press bends that prob took it down to 2.25 but it isnt bad at all... and being stainless you know it will last vs making a new one out of mild steel

Link to comment
Share on other sites

THis was deff better than spending $250 at a shop.....I love doing my own stuff.

 

The car is a lot louder at idle now....I love it.

 

I wanted to do stainless, but my dad doesn't have the right wire to weld w/.....

 

I got better as the day went on...

 

I had a tendency to blow holes through the pipe, so I had to layer it on thick just to make sure there were no leaks.....LOL

 

 

...and Bob, any pics of your stock DP?........how much different is it than mine?

 

Do you think that maybe in 96, GM just started using the 3.4 DP's for the 3100's?

Link to comment
Share on other sites

it looks bad, still seems slow but does sound good.....

 

3100 = not fast.

 

Though I'm sure he'd outrun most of the 3100s on the road at this point. Provided they dont have cams, heads, bore, etc.

Link to comment
Share on other sites

o ya, I've stayed w/ a 3100 w/ 3400 heads/intakes.....

 

it pulls pretty hard for a 3100....on a good down shift in to first, the front end gets squirrelly...

Link to comment
Share on other sites

I'm curious what will happen if/when you open up the rest of the exhaust.

My guess would be not much, The stock DP is junk on these cars, But the rest of the exhaust is ok.

it looks bad, still seems slow but does sound good.....

 

3100 = not fast.

You can say that again. :lol: Now a S/C 3100/3400 would be :drool: :fap:
Link to comment
Share on other sites

it looks bad, still seems slow but does sound good.....

 

3100 = not fast.

 

Though I'm sure he'd outrun most of the 3100s on the road at this point. Provided they dont have cams, heads, bore, etc.

 

I would love to run him.. I am pretty sure I could easily hang with him if not pull from him..

 

 

And Adam, I will try to get some pics next time my car is on the lift at work and I have a camera with me..

Link to comment
Share on other sites

OMG.. Adam your car really does make me want to cry. It's just that awesome.

 

If I didn't know for a -fact- that there was a 3100 under your hood, I would call you a liar right now... watching that accel, especially how quickly your tach is jumping ABOVE 4k...

 

Just dead sexy. I know I said it before, but DAMN.

Link to comment
Share on other sites

LOL

 

Thanks guys!

 

 

I had a guy walk up today who hasn't seen my GP in a while and he asked if I had a modded motor.....cause it sounded sweet.

 

I LOL'd and said no....mostly stock.

 

 

I love the new sound......amazing how it opened up the sound.....I went down a HUGE hill tonight and used 1st gear as an engine brake and the RPM's were hangin around 3500-4k and it was cackling and cracking all over....LOL

 

sounded sweet

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share


×
×
  • Create New...