The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-17-2016, 01:56 PM   #1
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by Jeramy View Post
i put 2.5 inch pipe and thrush welded 2 chambers on mine but turned them out each side in front of the rear tires. absolutely no drone. was louder than expected until i reduced my cam lift now not really bad at all.
cool, do you have long tube headers? word on the street is long tube headers are more prone to droning than stock exhaust manifolds, I am not sure if there is any truth to that, so just checking in?
Gregski is offline   Reply With Quote
Old 08-18-2016, 12:05 AM   #2
Jeramy
Registered User
 
Jeramy's Avatar
 
Join Date: Dec 2014
Location: Mulberry, AR
Posts: 222
Re: Restoring Rusty

Quote:
Originally Posted by Gregski View Post
cool, do you have long tube headers? word on the street is long tube headers are more prone to droning than stock exhaust manifolds, I am not sure if there is any truth to that, so just checking in?
yep. long tubes, albeit small diameter, literally straight 2.5 inch pipe into the mufflers then a 90 degree bend out the side. lines up right under my front spring hanger.
you can just make out the exhaust in front of the rear tire. the plus side is the small (short) cars really love it at the stop lights...i think lol
__________________
1981 Silverado C10 LS/4l60e
My truck may be loud and ugly but I love her like bacon
Jeramy is offline   Reply With Quote
Old 08-18-2016, 03:15 AM   #3
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by Jeramy View Post
yep. long tubes, albeit small diameter, literally straight 2.5 inch pipe into the mufflers then a 90 degree bend out the side. lines up right under my front spring hanger.
you can just make out the exhaust in front of the rear tire. the plus side is the small (short) cars really love it at the stop lights...i think lol
black mirrors, black grille, black bumpers, black wheels, what's not to like? black door handles - BONUS!

um lets get those windshield wipers blacked out please - ha ha
Gregski is offline   Reply With Quote
Old 08-17-2016, 02:08 PM   #4
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Truck doing more truck things, scored a heavy duty shelf for all our camping gear

OMG Greg are you going to share pics of every time you use the truck? Well duh, yeah!!! JK, ha ha
Attached Images
 
Gregski is offline   Reply With Quote
Old 08-17-2016, 02:12 PM   #5
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

By the way the Safari web browser stinks on the iPhone for forum updates, it only uploads one pic at a time and if you try to upload multiple pics the last one wins and if later you wanna add a second pic it will just replace the first, epic fail
Attached Images
 
Gregski is offline   Reply With Quote
Old 08-18-2016, 12:12 AM   #6
Jeramy
Registered User
 
Jeramy's Avatar
 
Join Date: Dec 2014
Location: Mulberry, AR
Posts: 222
Re: Restoring Rusty

just my personal opinion that your drone is caused by dumping the exhaust under the truck. mine droned with the previous exhaust. which was stock manifolds, 2.25 pipe and cheap turbo mufflers dumped in front of the axle. didn't want to spend 150 bucks on the pipes to go over the rear axle so turned mine out the sides.
__________________
1981 Silverado C10 LS/4l60e
My truck may be loud and ugly but I love her like bacon
Jeramy is offline   Reply With Quote
Old 08-18-2016, 03:16 AM   #7
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by Jeramy View Post
just my personal opinion that your drone is caused by dumping the exhaust under the truck. mine droned with the previous exhaust. which was stock manifolds, 2.25 pipe and cheap turbo mufflers dumped in front of the axle. didn't want to spend 150 bucks on the pipes to go over the rear axle so turned mine out the sides.
hmmm, either it's the angle or yours be a long bed truck, I wonder if the extra length or room for a bit longer exhaust pipe run helps eliminate the drone in your case?
Gregski is offline   Reply With Quote
Old 08-18-2016, 07:54 AM   #8
Tiger Joe
Registered User
 
Join Date: Mar 2015
Location: South of Pittsburgh
Posts: 428
Re: Restoring Rusty

I agree if your exhaust is dumped under the bed before I swapped mufflers I be getting tailpipes and getting it to exit.

my dad has a c30 dump. had dumped exhausted ending right before the rear axle for 20+ years. was just LOUD. not even good loud just loud. I swapped a pair of cheapo summit mufflers (think they cost $30 each) and put the exits in front of the back tires. He get complements everywhere he goes now on how awesome the truck sounds.
Tiger Joe is offline   Reply With Quote
Old 08-18-2016, 09:15 AM   #9
blazer2007
Registered User
 
Join Date: Jan 2007
Location: vernon b.c.
Posts: 3,022
Re: Restoring Rusty

my sounded terrible until I went with the full exaust
blazer2007 is offline   Reply With Quote
Old 08-18-2016, 09:59 AM   #10
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by blazer2007 View Post
my sounded terrible until I went with the full exaust
what are you running? FlowMasters?
Gregski is offline   Reply With Quote
Old 08-18-2016, 06:38 PM   #11
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

thought I would share a pic of a cool cut away of a Flowmaster muffler I saw today at a Hot Rod store while picking up some 90° elbows for my side exits

the flow is right to left <==

[all together now], ahh that's how you make the drone sound LOL
Attached Images
   
Gregski is offline   Reply With Quote
Old 08-18-2016, 09:29 PM   #12
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

alright lets give the side exits a shot to see if that drowns out the drone

so the passenger side first - here it goes
Attached Images
    
Gregski is offline   Reply With Quote
Old 08-18-2016, 11:30 PM   #13
harley87ta
Registered User
 
Join Date: May 2016
Location: Sun City, CA
Posts: 34
Re: Restoring Rusty

Is that hot rod store Tognotti's?
harley87ta is offline   Reply With Quote
Old 08-19-2016, 12:17 AM   #14
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by harley87ta View Post
Is that hot rod store Tognotti's?
Si my brotha
Gregski is offline   Reply With Quote
Old 08-19-2016, 01:59 AM   #15
harley87ta
Registered User
 
Join Date: May 2016
Location: Sun City, CA
Posts: 34
Re: Restoring Rusty

I miss going there. Stuck in socal now a desert wasteland
harley87ta is offline   Reply With Quote
Old 08-19-2016, 11:26 PM   #16
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

why don't you all grab a beer and follow me to my metal shop and we can take a look at the new and improved side exhaust Flow-a-Masters

took no time at all to cut the down pipes off and weld up some of these 90° elbows

now we are able to spew Carbon Monoxide at two Priuses at the same time whilst stopped at a red light - what's not to like

So is the drone gone? No not all the way gone but believe it or not its better, technically the drone used to be at 1000 RPM and now its at around 800 RPM (this is better on cold starts since with fast idle on your head was a poundin' till the rig warmed up)

so in the pics you can't really tell but they go out to the side and are angled a little bit down
Attached Images
  
Gregski is offline   Reply With Quote
Old 08-23-2016, 02:12 PM   #17
KevinCowTown
Registered User
 
Join Date: Nov 2013
Location: Calgary, AB
Posts: 31
Re: Restoring Rusty

Quote:
Originally Posted by Gregski View Post
... take a look at the new and improved side exhaust Flow-a-Masters...

So is the drone gone? No not all the way gone but believe it or not its better, technically the drone used to be at 1000 RPM and now its at around 800 RPM (this is better on cold starts since with fast idle on your head was a poundin' till the rig warmed up)
Good call on the Flowmaster's Gregski.

I cut a Flowmaster off an '04 5.3L F-150 and put on a brand new Magnaflow... to cut the drone. Worked great too.

Then I towed my 5,700 LB (probably closer to 7K with water, groceries and beer loaded) trailer out to Banff, Alberta through the Mountains. That little 5.3 Triton was turning pretty fast getting up the big hills.

By the time I got home, the exhaust from those 5500+ RPM hills had pounded the glass baffles in the Magnaflow flat and the truck droned worse than ever.
__________________
1985 GMC K2500 Sierra Classic / 350cid / TH400 Auto
KevinCowTown is offline   Reply With Quote
Old 10-10-2018, 06:04 PM   #18
MikeB
Senior Member
 
MikeB's Avatar
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,568
Re: Restoring Rusty

Quote:
Originally Posted by Gregski View Post

Took no time at all to cut the down pipes off and weld up some of these 90° elbows.
Now we are able to spew Carbon Monoxide at two Priuses at the same time whilst stopped at a red light...
So funny.

I have no problems with hybrids -- just ugly cars like the Prius. Apparently the "look at me I'm an ugly hybrid" style makes a statement about the owner being environmentally conscious and morally superior.
__________________
Mike
1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
MikeB is offline   Reply With Quote
Old 10-27-2018, 11:12 AM   #19
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by MikeB View Post
So funny.

I have no problems with hybrids -- just ugly cars like the Prius. Apparently the "look at me I'm an ugly hybrid" style makes a statement about the owner being environmentally conscious and morally superior.
The only thing worse than a Prius in front of you on the freeway is a Prius with an Uber sticker, and the only thing worse than that is a Prius with an Uber and a Lyft sticker!

Fact: Uber and Lyft stickers (subtract 10 MPH per sticker from the vehicles speed) are the opposite of Holey and MSD (add 20 horse power each)
Gregski is offline   Reply With Quote
Old 08-20-2016, 01:02 PM   #20
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

not a huge fan of the Felpro header collector white gaskets, this one parished after only a couple hundred miles of service, now I aint sure if its by design that they are supposed to get this brittle after heating up, or cause its that they've been sitting on the O'Really's shelf since the Pilgrims brought them over on the Mayflower
Attached Images
 
Gregski is offline   Reply With Quote
Old 08-20-2016, 01:05 PM   #21
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

got my new digital vacuum gauge installed and protected with an inline 2A amp fuseloge

love seeing it go from 16" at idle to 0" at Wide Open throttle to 23" of vacuum at off throttle while cruising
Attached Images
  
Gregski is offline   Reply With Quote
Old 08-20-2016, 07:14 PM   #22
Boog
laying low
 
Boog's Avatar
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,452
Re: Restoring Rusty

Hey Greg. You know any exhaust system changes call for the obligatory sound clip right?
And I have been thinking I might like to have a a/f meter for tuning. That's the first one in cab I've seen.
__________________
Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.

I stand for the flag and kneel at the cross
Boog is offline   Reply With Quote
Old 08-21-2016, 09:51 AM   #23
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

Quote:
Originally Posted by Boog View Post
Hey Greg. You know any exhaust system changes call for the obligatory sound clip right?
ha ha, it's really nothing to write home about, as the resonators tamed the rumble / raspines, but I will see what I can do

Quote:
Originally Posted by Boog View Post
And I have been thinking I might like to have a a/f meter for tuning. That's the first one in cab I've seen.
go for it you will wonder how you ever tuned without one, and by the way these days seems like everyone is offering these gauges (even Holley), but I am very happy with the INNOVATE products especially the ease of use and quality of the actual hardware
Gregski is offline   Reply With Quote
Old 08-21-2016, 10:04 AM   #24
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty - Manual Steering Box Rebuild

the manual steering box rebuild kit arrived so it was time to git er done
Attached Images
  
Gregski is offline   Reply With Quote
Old 08-21-2016, 10:08 AM   #25
Gregski
Post Whore
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,847
Re: Restoring Rusty

I figured I can delay it some more by doing whats completely un necessary...

come on we've all been there

time to remove the casting crests (those of you who followed along the engine rebuild know I did this to the block as well) you know those SEMA judges, picky picky - ha ha
Attached Images
  
Gregski is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:21 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com