more exhaust ?'s...
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
more exhaust ?'s...
The worst part is with my FMX, the stupid factory cooler arrangement puts these lines down around the bottom of the block and there is NO room for headers.....so I need to put the stick in it first
.
Now, it it would quit rain for more than 6 hrs....maybe I could get it done.
Larry
.Now, it it would quit rain for more than 6 hrs....maybe I could get it done.
Larry
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Elder User
Joined: Mar 2003
Posts: 541
Likes: 1
From: Phoenix Az, by way of Fre
more exhaust ?'s...
Friend of mine just gave me a 200 mile old stainless steel muffler and tail pipe off his 2003 Silverado.
I know I know, schivy parts, but it's 3" in and out and stainless and ought to be quiet.
I'll be laying on the ground tonight to see if it'll fit. I will at least be using the muffler.
Anyone know where I could buy a 'Y' pipe for our trucks?
I know I know, schivy parts, but it's 3" in and out and stainless and ought to be quiet.
I'll be laying on the ground tonight to see if it'll fit. I will at least be using the muffler.
Anyone know where I could buy a 'Y' pipe for our trucks?
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
more exhaust ?'s...
I doubt you can purchase a new y-pipe for these trucks. I may be wrong, but you'll probably have to get someone to make some down-pipes.
I just removed the headers from my stock 352 and replaced with stock manifolds and have not noticed a performance difference.
I just removed the headers from my stock 352 and replaced with stock manifolds and have not noticed a performance difference.
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Elder User
Joined: Mar 2003
Posts: 541
Likes: 1
From: Phoenix Az, by way of Fre
Well.
The Silverado exhaust was not going to fit no way no how.
I had 2-1/4" tubes run from the stock manifolds, they 'Y' into a 3" pipe that is run all the way out the back. I put a DynoMax MagnaFlo muffler on it, and the exhaust exits behind the rear passengers side wheel.
It is still not a quiet truck by any means, but it is much more quiet than the old glass packs were, and the tone is very mello.
Idle is about the same noise level as with the duals and glasspacks, but at a stready cruise or durring acceleration there is no comparisson. I can drive at 60-70mph and talk to passengers without yelling... at 50mph I don't even have to raise my voise.
I like it, I like it a lot.
The Silverado exhaust was not going to fit no way no how.
I had 2-1/4" tubes run from the stock manifolds, they 'Y' into a 3" pipe that is run all the way out the back. I put a DynoMax MagnaFlo muffler on it, and the exhaust exits behind the rear passengers side wheel.
It is still not a quiet truck by any means, but it is much more quiet than the old glass packs were, and the tone is very mello.
Idle is about the same noise level as with the duals and glasspacks, but at a stready cruise or durring acceleration there is no comparisson. I can drive at 60-70mph and talk to passengers without yelling... at 50mph I don't even have to raise my voise.
I like it, I like it a lot.
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
I just got my new issue of CarCraft and it has some good articles about headers. One is on a coating that you can get from VHT. Then there is an article on a dyno test they did on a stock 350 chevy ( of course ) one run with stock manifolds and another pull with headers, with no other changes. They gained 34 horsepower an 53 lb-ft of torque. I put headers on a bone stock 74 highboy 360 once and I couldn't believe how much it woke up. With stock exhaust it topped out at 85 and with headres it had no problem burying the peg. I also gained 1 1/2 - 2 mpg. Maybe you guys that can't notice the difference are just too lightfooted to notice any difference.
A word of caution tho, you get what you pay for and cheap headers often fit poorly and can be expected to have the life expectancy of a cheap tailpipe in your area.
A word of caution tho, you get what you pay for and cheap headers often fit poorly and can be expected to have the life expectancy of a cheap tailpipe in your area.
Posting Guru
Joined: Mar 2003
Posts: 1,622
Likes: 0
From: nevada
header rust
You guys need to move to the desert! I've had the same set of Hedman's on my old 390 for 10 yrs and now on my rebuilt 390 for almost 2. Big diff in perf from the old manifolds and unloaded about 40 lbs from front of truck. Same story with that 80lb intake manifold.
Senior User
Joined: Aug 2001
Posts: 212
Likes: 0
From: Wimberley, TX
I put the Hedman's on my 360/C6. I'm not sure what the ball/socket you are talking about. Mine have a 3 pt flange for the exhast pipes. The muffler shop I used charged me $220 for instaling the plumbing from the headers back. I supplied the Flowmasters which were a gift from a friend and I had the exhaust run to just in front of the rear tires. It would have cost more for him to bend the pipes to take it to the rear. I thought it would look better by the tire, and it does, and same myself some money. The sound is great but it is a little much in the cab even with the windows up.
Senior User
Joined: Jun 2003
Posts: 281
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From: Bearspaw (near Calgary)
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Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
$220 sounds a bit steep for a system that ends at the axle with your mufflers. We have a shop here that put full duals all the way back with glasspacks for $160 on my 62 Galaxy convert. I didn't like the glass packs much though, too crackly.
Senior User
Joined: Jun 2003
Posts: 281
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From: Bearspaw (near Calgary)
8NRay, I moved my mufflers from under the cab to under the bed. Only cost a few $$ as all the pipe was already there, all I had to do was cut and splice. It made a huge difference to the sound in the cab but from the outside it still sounded good.
Senior User
Joined: Jun 2003
Posts: 152
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In my neck of the woods my favorite shop will do pretty much any full dual exhaust for $180, you supply the mufflers and H pipe if you want one.
If you put your mufflers under your bed instead of the cab it will reduce your interior noise a good bit. I personally hate exhausts that don't exit out the back, there is too much noise in the cab or interior.
I have done several replacement exhausts but for a custom exhaust it gets taken somewhere, they do ten times better of a job than I could. Some exhaust kits I have seen are of pretty poor quality, it depends who makes them, though.
If you put your mufflers under your bed instead of the cab it will reduce your interior noise a good bit. I personally hate exhausts that don't exit out the back, there is too much noise in the cab or interior.
I have done several replacement exhausts but for a custom exhaust it gets taken somewhere, they do ten times better of a job than I could. Some exhaust kits I have seen are of pretty poor quality, it depends who makes them, though.
Elder User
Joined: Oct 2003
Posts: 702
Likes: 0
From: kingman az
exhaust info
hey clean lx a guy i know has a ford powered motorhome he tried headers didnt work very well used stock manifolds then used 3 inch pipes into a single muffler improved his mpg and power
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Installing headers allows your engine to breath easier which could change the fuel delivery requirements. If an engine ran better and more efficient with cast iron mahifolds then it could have needed rejetted. This usually isn't a problem for a Ford because Ford likes to calibrate their engines on the fat side from the factory.
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Elder User
Joined: Mar 2003
Posts: 541
Likes: 1
From: Phoenix Az, by way of Fre
Re: exhaust info
Originally posted by lrd56
hey clean lx a guy i know has a ford powered motorhome he tried headers didnt work very well used stock manifolds then used 3 inch pipes into a single muffler improved his mpg and power
hey clean lx a guy i know has a ford powered motorhome he tried headers didnt work very well used stock manifolds then used 3 inch pipes into a single muffler improved his mpg and power
I will have headers someday... and 4bbl... someday...
I thought my truck 'felt' better in the power department after the switch, but I have no proof... It just didn't seem to work as hard.
It used to be that I had to fill up every Monday morning on my way to work(every 7 days)... I now go 8 (can streth to 9) days between filling up driving the exact same route... but it's gotten cooler here too, so, I don't know if it's the exhaust alone, or the more on account of the more power friendly cooler air.