What headers+Y-pipe should i get for my camaro? im going to be running a 400 with LT1 intake, edelbrock heads, ect. i think the 1 3/4 would be better for the engine but what would anyone suggest,the ports on the heads are around 1 1/2 on the heads so someone with info please help me out. also if theres going to be a hp difference from the 2 please let me know, i can get a set of edelbrock TES nickle/chrome 1 5/8ths headers for 345 from summit and i can get a used set of 1 3/4 with a 3in cat for 350 shipped. what would you guys suggest?

 

Well in my opinion, If you only have 1-1/2 " ports in the heads, then 1-3/4" primary tubes would almost be a waste. 1-5/8" tubes will be fine for that motor.

 

What heads are you running?

Fluid dynamics can be a funny thing. Even if the port is only 1-1/2" diameter, 1-3/4" headers may still be the better choice.

 

This is a very good point. What rpm's do you plan on running with this motor? If it is a low rpm motor than the 1 5/8" will work well. If the motor will spend a lot of time in the upper rpm's than the 1 3/4" would be better.

 

i have a set of edelbrock heads, so i figured the edelbrock TES headers probably would be a best bet scenario, and the limit on the RPM's will be about 5500. so i wont be winding it really high.

 

You may want to look at a better set of 1 5/8" headers. The edelbrocks are okay but leave a lot do be desired. I would have a good look at the hooker 2055's. They really are the best 1 5/8" header out there for our cars.

 

I'm not sure the Edelbrock->Edelbrock arguement holds water, either.

The heads are general purpose performance parts. The headers are 3rd-gen-specific emissions-legal, performance-enhancing parts. Attaching their headers to their heads was most likely not even on the table when either was designed.

With the larger cubes of the 400, I'd say the 1-3/4" primaries are probably the better bet. However, the 2055's are really good parts, and may be just fine for your application.

 

The April 2004 Chevy Hiperformance magazine has a good comparison of the primary tube sizes, long and short tubes. All done on the same motor on a dyno.

 

the 2055's come with a Y-Pipe correct? and do they have the 3 inch outlet on the y-pipe....it doesnt matter if i have smog on the car. and i think the hooker headers are for smog, i dont remember ill have to check, but does hooker make non smog camaro headers?

 

Yes they do and that y-pipe is a true 3". It is really the only header kit for our car that comes with a 3" y-pipe. I think the hedmans and SLP's are both only 2.5 or 2.75. Someone correct me if I am wrong. The Hooker 2055's are hard to beat. if they came without the air tubes and had the option of stepping up to a 1 3/4" primary they would quardroople(sp?) their sales.

 

Edelbrock's headers for the HO/TPI cars are 3in for a slip on 3 in cat. also im pretty sure slp's are 3inch as well. i went on the website for holley(hooker got bought out pretty much) and they showed long tube 1 5/8ths headers with smog. but they are special order. lol weird and i also checked on the smog and did realize they come on it and with the y pipe all for 360 in summit. maybe i get a set, but i dont know i like the nickle plated edelbrocks for 345. but i dont know how long itll stay kinda looking like that i dont care if it discolors like the bluish color but i dont want them rusting.....

 

As I understand it, though, the pipe after the two come together is 2-1/2", with a 3" collar welded on to mate to the cat.

Ceramic coating protects from rust, reduces heat transfer through the metal, and doesn't discolor. Chrome doesn't do any of those effectively long-term.

 

I would go with the slp for 350 better deal they wont rust. You could also sent them off to be coated.

 

Five7 i know what headers your talking about, it is the LG4 non HO/TPI ypipe if i remember correctly, iv seen a pic of the 3in one, and the whole thing is 3......but i highly doubt it goes to a 3in collector for the slip on 3in because if they wanted to make it for a stock converter(which they do) i think they have the headers that bolt straight to the converter. and then the "slip on 3 in" but someone must have a set on this board to know for sure. also the slp headers i can get are rusted a little.... not sure what thats about, also i really dont like the ceramic coating. but theres really not much i can do about it unless i put my own rust preventive paint that i have to bake it on in my oven.....lol since everyone thinks the 2055's are going to be myb est bet, anyone have set f/s? ill just post in the classifieds. i wont be able to purchase them for about another week. im switching jobs and i have 2 tickets to pay for and i might have to get a lawyer to get out of them or ill lose my license for a year!!!!!!!!

 

if you are using 1-5/8 tubes you need the 3" collector that hooker/heddman provide,the 1-3/4 only have a 2.5"collector and work very well on 350s but a larger c.i. motor does not benifit from these hedders as much,besides the larger the primary tube the more gear you really need,now when you step up to the longtube design the1-3/4 hooker longtubes like larger c.i. motors and appropriate gear,the 1-5/8 longtubes are great for 305-mild 383s all of this is a factor to be considered when choosing cams,heads,intakes etc..