1 5/8 vs 1 3/4 primarys

[84sbcregal23deg]

i think that was a wise decision going with the smaller primary tube. an 1 3/4 would be a bit on the large side. not that it wouldnt work, but it wouldn't make the low end torque, or probably anymore peak horsepower than the 1 5/8.

 

[moose]

So...I recieved the Shoenfeld's and one thing they don't mention on their web site is that they won't work with some kicked out oil pans (it is, however printed in the parts catalog that comes with the headers :? ) Well they don't fit around my pan and had to send them back. I resorted to my last option and called Hooker to make sure their Super Comps will work with my pan. (I've been avoiding them because they're expensive, but I have vortecs and my options are kinda limited) I was told that with D-ports I have to use 1 3/4 or I won't get a good seal. I held my breath and ordered them.

On a side note; I scored a dual setup off a Monte, collectors to tips with mufflers that look generic. Looking at it closer, I realized that the pipes are 2.25 from collector to muffler and 2.5 out to the tips.

So i'll have 1.75" primarys into a 3" collector, into a 2.25" pipe to the muffler and exit with 2.5"
What kind of bad things can I expect from this ridiculous setup? I want an H-pipe to help with noise levels and am going to replace the mufflers with either Aero Turbines or Hooker Aeros. Should I just have the smaller 2.25 pipes replaced with 2.5 while I have the car at the muffler shop?

 

[custom442]

get the big headers if this is a 383. Youll have more room for top end mods over time that way. 2.5" exhaust. yes magnaflows do deteriorate over time but nothing like a flowmaster. I don't know why because flows aren't packed but they loose power and sound awful after 1-3 years. I have hooker aerochambers on mine right now and it sounds mean not flowmaster fake, love em

crossovers, h pipe, x pipe they're all b.s. adds weight and doesn't do anything for power. They got popular and I'm sure exhaust companies and welding shops alike ran with it because its more $$ in their pocket. I had x pipes on my car and then went to duals (15lbs extra for x and pipes). No difference in performance or sound. Possibly with a smoother cammed engine a crossover pipe will help resonate and give it a deeper sound, ford tends to use them on their tiny v8s and they do sound good.

 

[larryo454]

So...I recieved the Shoenfeld's and one thing they don't mention on their web site is that they won't work with some kicked out oil pans (it is, however printed in the parts catalog that comes with the headers :? ) Well they don't fit around my pan and had to send them back. I resorted to my last option and called Hooker to make sure their Super Comps will work with my pan. (I've been avoiding them because they're expensive, but I have vortecs and my options are kinda limited) I was told that with D-ports I have to use 1 3/4 or I won't get a good seal. I held my breath and ordered them.

On a side note; I scored a dual setup off a Monte, collectors to tips with mufflers that look generic. Looking at it closer, I realized that the pipes are 2.25 from collector to muffler and 2.5 out to the tips.

So i'll have 1.75" primarys into a 3" collector, into a 2.25" pipe to the muffler and exit with 2.5"
What kind of bad things can I expect from this ridiculous setup? I want an H-pipe to help with noise levels and am going to replace the mufflers with either Aero Turbines or Hooker Aeros. Should I just have the smaller 2.25 pipes replaced with 2.5 while I have the car at the muffler shop?

Hi what pan do u have that the headers don't fit? The kick out pan that i put on the 389 got lots of room you can see it in my album, you must have a circle track pan?

 

[DoubleV]

crossovers, h pipe, x pipe they're all b.s. adds weight and doesn't do anything for power. They got popular and I'm sure exhaust companies and welding shops alike ran with it because its more $$ in their pocket. I had x pipes on my car and then went to duals (15lbs extra for x and pipes). No difference in performance or sound. Possibly with a smoother cammed engine a crossover pipe will help resonate and give it a deeper sound, ford tends to use them on their tiny v8s and they do sound good.

Seriously? How do you explain the crap tons of people who DO make more PROVEN power with a crossover of some sort? Do you really believe just because 'part A' doesn't do much for a particular application that that means it would be equally useless on a totally different application?

Also note that some X-pipes are better than others.

In regards to the OP's question, I'd probably go with the 1 5/8, but the engine seems to be near the borderline, so I don't think the larger headers would be a horrible choice. Just pick where you want to emphisize your power, and pick the header size to match that.

 

[custom442]

crossovers, h pipe, x pipe they're all b.s. adds weight and doesn't do anything for power. They got popular and I'm sure exhaust companies and welding shops alike ran with it because its more $$ in their pocket. I had x pipes on my car and then went to duals (15lbs extra for x and pipes). No difference in performance or sound. Possibly with a smoother cammed engine a crossover pipe will help resonate and give it a deeper sound, ford tends to use them on their tiny v8s and they do sound good.

Seriously? How do you explain the crap tons of people who DO make more PROVEN power with a crossover of some sort? Do you really believe just because 'part A' doesn't do much for a particular application that that means it would be equally useless on a totally different application?

Also note that some X-pipes are better than others.

yes the "crap that tons of people" with crossovers to make 'proven' power is bullshit. Maybe I should of used a different word to attract less attention. Where is all this undeniable proof, and that the vehicle in question didn't install unrestrictive duals in the first place. Adding restriction in the exhaust pipe by crossing exhaust pulses doesn't make extra power for the price. They make nice noises in certain applications as proven by manufacturers engineering exhaust for the correct tones. We all know open headers makes the most power. Exhaust cutouts would then be the only way to make 'proven' power on a street car.


When you're hitting 9000rpms in your small block and 200mph at all times then we can talk about gaining 3 hp via crossovers, until then you're kidding yourself

 

[SScamino]

crossovers, h pipe, x pipe they're all b.s. adds weight and doesn't do anything for power. They got popular and I'm sure exhaust companies and welding shops alike ran with it because its more $$ in their pocket. I had x pipes on my car and then went to duals (15lbs extra for x and pipes). No difference in performance or sound. Possibly with a smoother cammed engine a crossover pipe will help resonate and give it a deeper sound, ford tends to use them on their tiny v8s and they do sound good.

Seriously? How do you explain the crap tons of people who DO make more PROVEN power with a crossover of some sort? Do you really believe just because 'part A' doesn't do much for a particular application that that means it would be equally useless on a totally different application?

Also note that some X-pipes are better than others.

yes the "crap that tons of people" with crossovers to make 'proven' power is bullshit. Maybe I should of used a different word to attract less attention. Where is all this undeniable proof, and that the vehicle in question didn't install unrestrictive duals in the first place. Adding restriction in the exhaust pipe by crossing exhaust pulses doesn't make extra power for the price. They make nice noises in certain applications as proven by manufacturers engineering exhaust for the correct tones. We all know open headers makes the most power. Exhaust cutouts would then be the only way to make 'proven' power on a street car.


When you're hitting 9000rpms in your small block and 200mph at all times then we can talk about gaining 3 hp via crossovers, until then you're kidding yourself

I wish I could like this post..

 

[custom442]

I wish I could like this post..

Are there really that many people thinking crossover pipes make that much difference?

I'm not picking on you in particular, but it seems theres a lot of people in the car world that love to jump on the new power-bandwagons. The mentality of anything that frees an extra 5hp I'll gladly pay twice the price. I got suckered too, just trying to help some guys out so they don't do the same thing.

I'll bet if instead of xpipes this was talking about electric water pumps there wouldn't be as much traffic, which is essentially the same thing. If only for powers sake its b.s. for the miniscule power thats freed on a street car.

 

[DoubleV]

yes the "crap that tons of people" with crossovers to make 'proven' power is bullshit.

This statement proves you don't know what you're talking about. What do you base this rediculous statement on anyway?

Where is all this undeniable proof, and that the vehicle in question didn't install unrestrictive duals in the first place.

You mean besides back to back tests on countless runs at the strip and chassis dynos by tons of people in the past/present over and over and over again?

Adding restriction in the exhaust pipe by crossing exhaust pulses doesn't make extra power for the price.

So an H or X is a restriction in the exhaust? Are you kidding me? Do you even understand the principle behind a crossover like these? Just do a simple internet search, as it gets pretty darn complex ( and I certainly don't fully understand everything myself ).

We all know open headers makes the most power.

So you're comparing a full X-pipe exhaust system to open headers? Sure, maybe in that case, but even then in SOME cases an X has made equal to and in some rare cases MORE power than open headers.

Now for me, I'm talking about a car with a full dual exhaust vs the same car with nothing different other than an H or X pipe.

When you're hitting 9000rpms in your small block and 200mph at all times then we can talk about gaining 3 hp via crossovers, until then you're kidding yourself

I'm sorry, but you're just making yourself look really bad with statements like this.....

 

[SScamino]

I wish I could like this post..

Are there really that many people thinking crossover pipes make that much difference?

I'm not picking on you in particular, but it seems theres a lot of people in the car world that love to jump on the new power-bandwagons. The mentality of anything that frees an extra 5hp I'll gladly pay twice the price. I got suckered too, just trying to help some guys out so they don't do the same thing.

I'll bet if instead of xpipes this was talking about electric water pumps there wouldn't be as much traffic, which is essentially the same thing. If only for powers sake its b.s. for the miniscule power thats freed on a street car.

I don't think that at all. I was just arguing this in a post a couple weeks ago. For the power made, there's really no point unless you need everything you can get.... I'm on your side dude..