are there any other measurements besides 1 3/4 that are considered long tube. and what do i need to make sure is included in the header package for proper installation?

 

theres 1 7/8

 

I did a little research on Long and Mid length Headers, still haven't found a definitive definition on the two but here's the general gains of both (cut and pasted from various sources);

The LONGER primaries of the LG's & Dynatech tend to LOSE their scavageing effect above 3500 rpms.. They are GREAT for LOW END TORQUE at LOWER RPMS. Perfect for street driving & road racers..

However for DRAG racing, the brands with shorter primaries KOOKS, AR, TPIS, will OUT PERFORM from 4000-7000 rpms, exactly where the powerband is @ WOT....

The dyno results may only offer minimal if any gains, but on the dragstrip, a .05-.1 quicker ET can be had.

Dyno tests with headers having primary lengths adjustable in three-inch increments show that lengths between 24 and 36 inches have only a minor effect on the power curve of V-8s that you and I can typically afford, although the longer pipes do marginally favor the low end.

PRIMARY PIPE LENGTH
"The overall length of the primary header pipe is governed almost exclusively by the target engine's rpm range, which is dependent upon wave tuning. Typically, a lower engine rpm range likes a longer primary pipe, while a high rpm engine prefers a shorter primary."

PRIMARY PIPE LENGTH
The length of the primary pipes also affects torque. Where diameter affects the torque peak relative to rpm, the length affects the shape of the torque curve. Longer primaries provide more torque below the peak and reduce it past the peak. Shorter primaries provide more torque above the peak at the expense of below-peak torque. More torque in the low- to mid-rpm range is important to drivers who want that feeling of seat-of-your-pants performance on the street. Longer primaries also reduce the chance of escaping exhaust's being drawn back up another pipe.

In order to keep the torque curve the same for all eight cylinders, it is important that primary pipes be equal in length. Exactly how equal they have to be is more critical on uncorked race cars than for the vast majority of mild-engined street cars running through mufflers. In most applications, pipe length deviation of 2 to 3 inches on a set of full-length headers is not a problem.

As far as what parts you'll need to finish the install... That really depends on what you are buying, with or wihtout an X Pipe or CATs, where the front O2 bungs are located, are you running rear O2s... ect.

 

Tim,

GREAT research ...... someone could write a book on exhaust tuning .... but you have pointed out some important issues .... that any header system has pluses and minuses .... .and that the buyer should do the research to figure out which system is best for their particular application.

With cars ... bigger is not neccesarily better .....

 

Yeah Im Wanting A More Simple Answer Hahaha! Are There Any Other Sizes Besides 1 3/4 That Are Considered Longtube Headers

 

Like it was said above..you can typically get long tube headers in 1 3/4 & 1 7/8.

 

You keep asking about length but keep referring to diameter (1 3/4). One has nothing to do with the other.

 

I SAID SIZE......................size can be a anything not just length ok Johnny boy.

thanks to every 1 that posted

 

Unless you have increased the displacement of your engine, buy a 1 3/4 inch system. 1 7/8 is only appropriate for larger displacement engines.

If you buy a long tube system from American Racing Headers, LG Pros , Kooks, or Dynatech, yo will get the headers, the x-pipe the high flow cats, the gaskets and the clamps.

If you are doing a self install buy American Racing.
They do not require you losening motor mounts and shifting the engine.

 

what about BBK longtubes CNC series?

 

There are 1 3/4 inch "shorty" headers .... the DIAMETER of the pipe has nothing to do with the LENGTH of the pipe .....

Long tubes are called that because the "collector" is much further away from the engine then the stock manifold collector. The difference between "short" and "long" tubes is usually determined by a manufacturer who may offer both ..... I've never seen a "rule" that defines a minimum LENGTH to be called a "long" tube.

OK Johnny boy ????

 

thats y i said size can be anything

 

Hi luckyirishguy -

You have recieved some excellent feedback here.

The DIAMETER of the pipes used in the construction of a header is not what makes it a long-tube design - it is the length of the pipes that run from the head to the collector.

The diameter use should favor the output and cubic inches - a stock 348 favors a 1 3/4, and a larger cube engine favors the larger diameter 1 7/8 longtubes.

Generally speaking, if you have to replace your factory h-pipe to install a given header, you have long tubes.

If you can simply replace your exhaust manifolds with the new headers and re-use the stock h-pipe, you likely have short tubes.

I have LG pros on my 02 Z, but when I go to a larger forged engine, I will go with larger tubes.

best regards-

mqqn

 

any1 know about BBK longtubes?