Headers! Bypassing?
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Headers! Bypassing?
I finished taking my exhaust manifolds off yesterday. I think I found the source to my clanking around problem on my passenger side exhaust there was a thick metal piece that went in between my flange and exhaust manifolds. Well the flange bolts were not to tight. Plus the only thing that was holing my exhaust on was the two flanges in the front where they connect to my manifolds and one screw in the back. Hopefully that was my clanking.
>>My question<<
When I took off my exhaust manifolds I had to take off some metal tubes that were on it. Both sides had them. What are these, and do I need to by pass them when I put my headers on. How would I go about by passing these. I don't know if it matters but I have no cadillac converter. There is a place for my o2 sensor to go on these headers also. Basically what all do I have to change around in the simplest way?
My manifolds are off and not going back on. I have to cut my exhaust off today which should be fun. I also have to paint my headers and the top end of my block. Should I sand the headers and my block down so the paint sticks better? The headers are already painted but their crap paint so Im going to buy the high temp spray paint for engine blocks.
The question I really want answered is what do I need to bypass if you can answer the others that would be cool too.
I appreciate the help.
>>My question<<
When I took off my exhaust manifolds I had to take off some metal tubes that were on it. Both sides had them. What are these, and do I need to by pass them when I put my headers on. How would I go about by passing these. I don't know if it matters but I have no cadillac converter. There is a place for my o2 sensor to go on these headers also. Basically what all do I have to change around in the simplest way?
My manifolds are off and not going back on. I have to cut my exhaust off today which should be fun. I also have to paint my headers and the top end of my block. Should I sand the headers and my block down so the paint sticks better? The headers are already painted but their crap paint so Im going to buy the high temp spray paint for engine blocks.
The question I really want answered is what do I need to bypass if you can answer the others that would be cool too.
I appreciate the help.
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Re: Headers! Bypassing?
The tubes on the manifolds are parts of the AIR system. If your headers don't have provision for it, you might as well just remove it all.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
What does the air system do? How hard is it to remove it? (Im in this for the long haul so I can use the help =) If this is for my air conditioner can I set up an air conditioner somehow? Thanks for the reply.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
Is it needed? what will happen if I take it off?....
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From: Illinois
Car: 89 GTA
Engine: 5.7 TPI L98
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Headers! Bypassing?
You'll break several federal laws and everyone will know you hate the environment and want adorable woodland creatures to die fiery, cruel deaths.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
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From: Illinois
Car: 89 GTA
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Re: Headers! Bypassing?
"You'll break several federal laws and everyone will know you hate the environment and want adorable woodland creatures to die fiery, cruel deaths."
This definatley made me lol quite a bit!
This definatley made me lol quite a bit!
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Thread Starter
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
You'll break several federal laws and everyone will know you hate the environment and want adorable woodland creatures to die fiery, cruel deaths.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
Joined: Dec 2005
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Headers! Bypassing?
Please dont make a hillbilly exhaust system. Headers dumped out in front of the rear tires with glasspacks sounds bad on hillbilly trucks, and it will definitely sound bad on your car with a stock 305 TBI. You will have about 3-4 inches of ground clearance at most and it will sound like a log truck with no mufflers. And your car has ground fx, random dumped muffler tips hanging out under the car just dont look right with cars that have ground fx.
At the end of the day it's your car, you can do what you want, but just be aware that the half-painted Camaro + headers dumped into glasspacks hanging under the car + ridiculous volume level on a stock engine is pretty much THE stereotype these cars have these days.
Also... you cant bore a 350 out of a 305?
At the end of the day it's your car, you can do what you want, but just be aware that the half-painted Camaro + headers dumped into glasspacks hanging under the car + ridiculous volume level on a stock engine is pretty much THE stereotype these cars have these days.
Also... you cant bore a 350 out of a 305?
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
Please dont make a hillbilly exhaust system. Headers dumped out in front of the rear tires with glasspacks sounds bad on hillbilly trucks, and it will definitely sound bad on your car with a stock 305 TBI. You will have about 3-4 inches of ground clearance at most and it will sound like a log truck with no mufflers. And your car has ground fx, random dumped muffler tips hanging out under the car just dont look right with cars that have ground fx.
At the end of the day it's your car, you can do what you want, but just be aware that the half-painted Camaro + headers dumped into glasspacks hanging under the car + ridiculous volume level on a stock engine is pretty much THE stereotype these cars have these days.
Also... you cant bore a 350 out of a 305?
At the end of the day it's your car, you can do what you want, but just be aware that the half-painted Camaro + headers dumped into glasspacks hanging under the car + ridiculous volume level on a stock engine is pretty much THE stereotype these cars have these days.
Also... you cant bore a 350 out of a 305?
hahahah oh my god.... Do you think Im retarded or something (not to sound like a dick because you have been trying to help me) Im redoing this car... groudn fx screw that ill cut a hole out in it. Im not half assing this. And apparently you can bore a 350 out of a 305 because thats whats in my car a bored out 305 with 350 **** in it. I also have a newer trans in it. If you cant bore it out to a full 350 he got pretty close. My engine is not stock.. I know that for a fact. IF I was going to cut a hole out in the ground fx it would be a perfect circle and it would sit flush with my exhaust tips. They wouldn't be hanging and everything would be fine. AND if I were to run them out my side I don't think I would put glass packs on them... Thanks for the advice anyway. Like I said Im most likely going to run them straight back with glass packs...
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
Plus I asked what I could put on my exhaust to filter it but I think I'm misunderstanding. If I put headers and run a straight exhaust back it wont blow a whole bunch of smoke out right? Thats why I'm trying to eliminate here (if this were to happen)
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From: phillipsburg, nj
Car: 87 iroc
Engine: mostly stock 5.7
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Re: Headers! Bypassing?
You'll break several federal laws and everyone will know you hate the environment and want adorable woodland creatures to die fiery, cruel deaths.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
And your ECM will probably throw a code, but Im not sure. Other than that it's just a trick the auto manufacturers used to help clean up the exhaust gasses to make them more environmentally friendly. If you have to deal with emissions testing it needs to stay.
people in escalades and navigators hate the enviroment....all that bass pouring out with their giant "dubs" hurt the ground and the trees. the furry woodland creatures are all deaf from it and thats why they run infront of our cars....sorry off-topic
Joined: Dec 2005
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Headers! Bypassing?
And apparently you can bore a 350 out of a 305 because thats whats in my car a bored out 305 with 350 **** in it. I also have a newer trans in it. If you cant bore it out to a full 350 he got pretty close. My engine is not stock.. I know that for a fact.
Also you know you have a 305 block because it says 5.0 on the back. You also know you have regular TPI heads. 083 heads. They have a lot of potential, but unless you have a massive cam we dont know about, Im going assume your motor is pretty much a stock 305 except it's low on compression with the big 350 heads. Go run it at the track and let us know the trap speed and weight and we can get a good idea of how stock it is, or at least how well it performs.
IF I was going to cut a hole out in the ground fx it would be a perfect circle and it would sit flush with my exhaust tips. They wouldn't be hanging and everything would be fine. AND if I were to run them out my side I don't think I would put glass packs on them... Thanks for the advice anyway. Like I said Im most likely going to run them straight back with glass packs...
This is what a well done side exit exhaust looks like:
You can easily put a real muffler in the area where the catalytic converter used to be, then run a boom tube out the side.
This is one that I saw taht didnt look too bad:
Note where the floorpans sit here... you can't just go up into the ground fx... the car is in the way.
Yeah i was wrong. Some of the smog stuff getting deleted upsets the computer, some doesn't. I haven't had the old TBI in like 3 or 4 years now so it's been a while.
Last edited by InfernalVortex; Oct 7, 2011 at 10:57 PM.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
Cutting a hole in the ground fx is usually half-assing it. I've seen it done well a couple of times (see BIG_MODS' car) but normally it looks terrible. You cant cut much out of the gfx anyway before you get into structural area in the unibody. This is about as high as you can go:
You cant bore a factory chevy block more than .060 inches over before the cylinder walls get dangerously thin. On a 305 that takes your cubic inches to I think 312. I'd never run a .060 over block again, though. The 350 bore is about a quarter of an inch larger than the 305 bore... .25 inches vs .060 inches. See the difference?
Also you know you have a 305 block because it says 5.0 on the back. You also know you have regular TPI heads. 083 heads. They have a lot of potential, but unless you have a massive cam we dont know about, Im going assume your motor is pretty much a stock 305 except it's low on compression with the big 350 heads. Go run it at the track and let us know the trap speed and weight and we can get a good idea of how stock it is, or at least how well it performs.
Glass packs are hillbilly but if you're happy with that, that's fine. I have a better idea though.
This is what a well done side exit exhaust looks like:
You can easily put a real muffler in the area where the catalytic converter used to be, then run a boom tube out the side.
This is one that I saw taht didnt look too bad:
Note where the floorpans sit here... you can't just go up into the ground fx... the car is in the way.
Yeah i was wrong. Some of the smog stuff getting deleted upsets the computer, some doesn't. I haven't had the old TBI in like 3 or 4 years now so it's been a while.
You cant bore a factory chevy block more than .060 inches over before the cylinder walls get dangerously thin. On a 305 that takes your cubic inches to I think 312. I'd never run a .060 over block again, though. The 350 bore is about a quarter of an inch larger than the 305 bore... .25 inches vs .060 inches. See the difference?
Also you know you have a 305 block because it says 5.0 on the back. You also know you have regular TPI heads. 083 heads. They have a lot of potential, but unless you have a massive cam we dont know about, Im going assume your motor is pretty much a stock 305 except it's low on compression with the big 350 heads. Go run it at the track and let us know the trap speed and weight and we can get a good idea of how stock it is, or at least how well it performs.
Glass packs are hillbilly but if you're happy with that, that's fine. I have a better idea though.
This is what a well done side exit exhaust looks like:
You can easily put a real muffler in the area where the catalytic converter used to be, then run a boom tube out the side.
This is one that I saw taht didnt look too bad:
Note where the floorpans sit here... you can't just go up into the ground fx... the car is in the way.
Yeah i was wrong. Some of the smog stuff getting deleted upsets the computer, some doesn't. I haven't had the old TBI in like 3 or 4 years now so it's been a while.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
removing all of it did not throw a code and hasnt on my 87 5.7 tpi. and its bone stock so idn
people in escalades and navigators hate the enviroment....all that bass pouring out with their giant "dubs" hurt the ground and the trees. the furry woodland creatures are all deaf from it and thats why they run infront of our cars....sorry off-topic
people in escalades and navigators hate the enviroment....all that bass pouring out with their giant "dubs" hurt the ground and the trees. the furry woodland creatures are all deaf from it and thats why they run infront of our cars....sorry off-topic
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
I go by what other people say lol, I have once again more than one person telling me different things. But ill trust the expert, and he did say he put a new cam in it... Im def taking it to the track though because I want an understanding of it also.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
I was referring to you guys as the experts. Of course he was no expert he was a drug dealer lmfao only know because he was trying to smoke with me. The way I look at it is this is my car now the past does not matter. And my brother in law said you can bore it out 40 and thats as far as you can go so I have no idea what to believe. Thats why I said ill listen to the experts because I dont know and until I know for sure Im not going to be dead set on one thing. I want to take my top end off but no torque wrench ( Im taking it off if that clanking is still there when I put these headers on. Then I will know for a fact its in the back left side of my engine on the bottom. Lifter,piston,rocker arm, w/e it may be I am going to fix it.
I have been working non stop on this car I love it. I dug a 5 foot hole in the sand to get my exhaust off (harder than it sounds the underneath of my car looked like a tunnel system). Don't worry I didn't dig it out in a dangerous way my car still able to exert an equal amount of pressure where the tires were + I didnt get that close to my tires and I piled sand up around them. It will be a lot easier when there is new tires on it so its off the ground more.
I have been working non stop on this car I love it. I dug a 5 foot hole in the sand to get my exhaust off (harder than it sounds the underneath of my car looked like a tunnel system). Don't worry I didn't dig it out in a dangerous way my car still able to exert an equal amount of pressure where the tires were + I didnt get that close to my tires and I piled sand up around them. It will be a lot easier when there is new tires on it so its off the ground more.
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Re: Headers! Bypassing?
Dude - get yourself some jack stands and a good jack. And work on that car on stable ground. You are going to wind up hurting yourself.
Joined: Dec 2005
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Headers! Bypassing?
Lmfao thanks for the help. Ill be sure to take it to the track theres one not to far from my house. I only wanted glass packs because I thought it muffled the sound of the headers. I just don't want it to be extremely loud... well I do but you know I dont want to be too much of a disturbance. I see the car getting in the way also lol idk I haven't decided yet. When I get the money ill tell you what I am leaning towards.
Joined: Dec 2005
Posts: 6,499
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: Headers! Bypassing?
BTW:
http://www.youtube.com/watch?v=r5JXQvPV34s
This is pretty much the ghetto glasspack sound. At least it's my personal idea of crappy glasspack exhaust on a stockish engine.
http://www.youtube.com/watch?v=r5JXQvPV34s
This is pretty much the ghetto glasspack sound. At least it's my personal idea of crappy glasspack exhaust on a stockish engine.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
Common overbore increments are .010, .020, .030, .040, and .060. There are risks with going to .060 on factory blocks. So .040 is definitely a safe limit. Some blocks cant go .040. But either way they are colloquially known as "10, 20, 30, 40, and 60 over" when spoken. So when he says "40", he doesnt mean a 345cubic inch engine, he means a 305 bored .040 inches on each cylinder, which would be about a 310. ci engine I think.
Glasspacks are EXTREMELY loud. That's why I suggested you go with something else. Any regular flowmaster will quiet it down enough to make it tolerable to live with and still be loud enough for you to be happy with the sound.
Glasspacks are EXTREMELY loud. That's why I suggested you go with something else. Any regular flowmaster will quiet it down enough to make it tolerable to live with and still be loud enough for you to be happy with the sound.
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From: Florida
Car: 1988 Camaro, Holley 600 series.
Engine: 350 w/350 TPI heads
Transmission: 90+ 700R4
Axle/Gears: not sure
Re: Headers! Bypassing?
So if I put a cat on my car would it reduce the noise a lot? And since I have to remove my air system will my o2 sensor still work. I read that post and it left me wandering these things... I just like being helped directly because when I post questions on other posts I feel like im stealing it.... would I mess with my computer if I took this off? What I mean by it is would my car run more lean? How can I correct this problem?
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Headers! Bypassing?
The computer has no way of knowing if the AIR system is there or not.
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From: San Antonio TX.
Car: Currently have 3 cars and 1 truck.
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Re: Headers! Bypassing?
You dug a 5ft hole to remove your exhaust? WOW! Dude all you need is some tools and some more knowledge...then lookout! Nothing will stop a guy willing to do whatevers necessary to build a project. Good luck.
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