I voted 2.5 only for better fitment but i'd take either as long as it could bolt to MAC headers.

 

see i"d say I could go with the 2.5, but I seriously question wether a 400+ ci motor with over 12 to 1 compression that will see over 7000 would be choked with it..... nevermind when I eventually add some nitrous

 

sounds like sarcasm to me...


whatever happens with this, if the system has an X-pipe, count me out the LS1 makes most of its power up top. i don't need to lose more low end, not to mention the loss in sound depth. why no one uses an H-pipe is beyond me. i think it would be smarter since no one offers an H-pipe TD setup for f-bodies. also, an H-pipe should be able to be tucked up even higher for better ground clearance. better ground clearance, better sound, more low end power while still gaining significant amounts up top...sounds like a winner to me

 

??? using a x-pipe makes you lose low end? where did i lose low end when i put the bassani sytem on with x-pipe over the borla 3" adjustable system?



and here comparing to stock exhaust

 

you'll lose low end in comparison to an H-pipe i meant. sorry i didn't explain it better. also, i've heard complaints of people "feeling" like they lost low end going from an aftermarket catback to X-pipe true duals.

 

You have to forgive chocotaco, he's a previous v6 owner and really doesnt know a whole lot about the ls1's yet. He did do a nice write up however on seafoaming.

As far as the h and x its all been researched and proven you just need to dig in here for the data. I'm not going to search for it and present it.
As far as space and tucking up; the Y pipe conjoins and fits from the factory, I think an x pipe will clear as well. Its all about money and time, which is money.

 

Some people confuse free flowing with loss of power. Its just not so. Anyone wants to sponsor me the money I'll do a complete comparision and write up as well as come up with a kit. Send your money to me Al Frankin.

 

Free flowing = moving the torque curve up. That means your torque peak and HP peak are moved up, which may feel like losing low end. Youll gain going to open headers, if all you want to do is go fast. However I do believe a full size 3" duals setup would slow down velovity and scavenging as the gasses cool and become heavy in the end of the pipes. I think 3" would do more for sound than it would for performance, atleast for all but the biggest motors. Im a big fan of staggered exhaust ( 3" to 2.5" )

 

I'd agree with you if I didnt see a cam only car come very close to my h/c numbers. Its why I chose my headers with 2.5 inch collectors as well. Scavenging.

His cam was bigger but his exaust was 3 inch. His torque wasnt as good but it was a different cam. 395hp and 366tq cam only on a mustang dyno. His exaust was 3inch from the header back and he was using a hooker for a catback. Cam was a t2

 

ignorance is bliss.

https://ls1tech.com/forums/showthrea...t=pipe+mustang

feel free to see a dyno graph an H-pipe **** all over an X-pipe nearly the entire rpm range. while not every setup will perform exactly the same, i've researched this topic enough to know what generally performs better and where. what's your excuse? or is your attitude usually just cocky and condescending? and please, explain to me what owning a V6 has to do with knowledge of exhaust gas flow? i'm pretty sure V6's have exhaust pipes also and the LS1 isn't the only engine out there that does.

 

Because over 2 years ago I researched this very same subject on this very same website, as well as others. I compared apples to apples and the h pipe was not preffered or better. Go ahead and think what you want I dont really care. Your posts about the 160 therm is another example of you not really knowing about the ls1 yet. You also had another post that was so ridiculous that you made my ignore list. I'm, not saying you dont have experience and dont know how to read I'm saying you dont know about ls1's yet. There is a reason for the x pipe and why its a better option. You dont want to believe it because you saw one graph from a mustang?!?!
Oh ya all v8's are the same right? Just like v6's but with two more cylinders right?

Pull a graph out comparing apples to apples. Thats your first step. Looking at what a mustang did is not proof that an h pipe is ideal in an fbody. DO they have the same engine? Your approaching ignore again.

ok maybe it was ls1.com before it went **** up that had all the info. Hard to search this site so I'll give you credit for not being able to find good info.

 

Ya I'm a dick sometimes. Low tolerance and lack of patience sometimes gets the better of me.

 

yes i'm aware that the graph is from a mustang. but what exactly does the graph show? it shows that the h-pipe will deliver more power under the curve until about ~5,300 rpm's. now, this principle should be generally true for most V8 engines. assuming this generalization, the h-pipe should also suit the LS1 better for under the curve power until ~5,000-5,500 rpm's - somewhere in between there. this would make an h-pipe a better choice for bolt-on cars with stock limiters since we see under ~5,300 rpm's much more frequently than over.

now, for H/C cars seeing a 7,000 rpm rev limiter paired with a 4400 stall, obviously an x-pipe will suit them better since they will see over ~5,300 rpm's more than under. unfortunately, this is a very small percentage of f-bodies out there since most f-bodies are stock or mild bolt-on cars.

if i go the route of TD's, i will persue the h-pipe, not just for the better sound, but for the better under the curve power boost since i don't think i've taken my car over 4,000 rpm's all this week. the reported less drone with an h-pipe is also an added plus. apparently x-pipes drone more according to the above link i posted. granted, the man used 40-series flowmaster mufflers, but i plan to go the route of 10-series flowmasters so i will likely see the same outcome.

and i fail to see where i said a V6 is exactly the same as a V8 just with 2 more cylinders. the majority of the things you said in your post never even so much as crossed my mind and i'm not sure where you got them from, but if you simply feel the need to vent, i can take it just fine.

 

Its kind of like saying that 1 5/8 headers will make more power and be better suited to all V8s because they work well on a mustang.

A mixing X-pipe, ala magnaflow style is cheaper to manufacture, but produces less HP, and has a different tone than say a Dr. Gas style X pipe. You cant compare the 2. Lane, who posted in that other thread is one of the most well respected when it comes to True Duals. We did much testing with him and his used-to-be fabricator, Mike (V6 Bird on here) And the X pipe always came out on top over the H pipe.

Proper merge angles, crosssectional area and exit angles play more of a role than anyone thinks. Thats why all Xs are not created equal, and why what one setup may work for a mustang may not work for a LSx powered car.

Chacotaco- My beef is that you have no hard data other than one mustang graph, and a bunch of people who you "heard" liked the H better, and the sound was better according to your "buddy."

I will be glad to waste my time on an X and H test this winter. Back to back, same car, same day, same dyno.


Louis

 

why does this keep popping up as a new post, yet there is never a new post?

 

doing 13.60s you should give advice.

 

id jsut like to see a 3inch to 2.5 system with the x pipe and an optional h-pipe for those who do want it. that would make both sides happy. but i gotta agree with the other folks. ive been going through all this stuff for like 2 years now and the LSx motors do very well with an x pipe. the h isnt bad but the x just uotperforms it, and balances out the exhaust gases better with less distance to travel and less bends

 

whats the point of this thread when its never going to happen?

 

Hey Louis,

What happened to the LG Headers that were supposed to come out by now? Did the headers not make any more power than Kooks/QTP, so LG decided not to produce them?

 

Nope, they are well on their way, just wrapping everything up We pushed their release date back a bit due to other things that had to get finished first.