i remember reading a post where Injuneer was explaining how baxter dyno'd his car for every mod or something, and the longtubes were not shining over the ASMs until 800+ rwhp or so, something in that area.

 

This might be true but I will say it again, "YOU CAN'T DENY THE RWHP THAT WAS MADE WITH THE AS&M MIDS" so long tubes aren't an absolute neccessity at the hp levels that most heads/cam/stroker guys on this board are going to build. And for those with ground clearance & emissions issues I wanted them to know that they can still reach there target hp levels with the right mids lengths. If people here want long tubes then that's fine, go for it but everyone may not want long tubes.

 

That's fine but look at the original title of the post, the question wasn't which one makes the most hp, the question is does anyone have a dyno comparison of lt's vs mids.

I'm not disputing you're gains with long tubes but maybe you should read thru my entire posts instead of just the first line, there are people who have emissions and gorund clearance concerns who want to know what there options are. NOT EVERYONE WANTS LONG TUBES ok.

 

I'm sure he wants a comparison to find out "which one makes the most hp", then compare it to whether or not it's worth the hassle/issues. I personally have not lowered my car, so i have no input on that, and I have no emission checks. I was just stating my input on what i experienced going from shorties to LT's(I know, their not mids and it's not a dyno graph, but too much info is better than too little ).

I did read through your entire post. YOU posted nothing about emissions and gc till after i posted...I read through them again.

 

I read all the posts, and thanks. I've also read a whole lot of threads on this topic in the past. One thing that's clear is that deciding which header will work best in what RPM range and on what engine is not so frieking easy. From everything I've read, the general conclusion is that LTs will be better for most LT1s. But what is even harder to come to any consensus on is how much better they are in general. I think the gains for most people would probably not be enough to warrant all the extra trouble that goes with LTs. But I do have a cam and ported heads so I was hoping that some kind of dyno might be out there to demonstrate if LTs would be worth it to me. I'm more interested in 1K-4K than I am in 4K+ since my car is driven daily.
That Car Craft article someone referred to...
That confounds me since from almost everything I've seen before, LTs are better from about 1-5 K and then shorties are better from 5K+. But it is a fact that for low end power one should have NARROW, LONG primaries. And for high end power one should have WIDE, SHORT primaries.

Here are some of the best threads and articles I've read on headers:
http://web.camaross.com/forums/showt...hreadid=223012
http://www.carcraft.com/techarticles...st/index1.html
http://www.sandersonheaders.com/letsgettech3.htm
http://web.camaross.com/forums/showt...header+article
http://web.camaross.com/forums/showt...essure+exhaust

 

i had a set of edelbrock mids on my car and i liked them, except for plug access. a while back i switched to hooker lt's and there is a pretty big difference between the two. i love the lt's. i did lose some midrange tourqe but my car sounds soooo much better. however, now i have clearance issues with the y pipe. i have the sportline lowering kit on my car and it is a pain in the ***. Lt's are most definitely worth it in my opinion. Lt's will make more power but they have clearance issues if you are lowered and they dont have a place for cats. IMO go longtubes and you will be alot more pleased. FWIW i had no issues with installation on my long tubes.

 

Im also pretty interested in finding dyno data, but for a different reason.

Seeing which header makes the most power is certainly interesting. However, I was more interested in how the different styles of headers affected the whole powerband. All im looking for are before and after dyno charts super-imposed over eacher.

 

If you look at the torque curve characteristic of the LT1... looks like the longtube header is the best candidate. At the real high HP levels, I don't doubt some gains could be found in specific rpm ranges using a shorter header and perhaps a special collector. Lots of tuning needed to determine that though.

-Mindgame

 

I am going into this headers debate in my mind currently.

I am trying to decide between hooker long tubes, or SLP shorties.

They both have their strong points.

With the shorties i think they will fit up with my current SLP y pipe, i will still pass emissions, will cost me less money. Also i have a loudmouth so the loudness of my exhaust is already a concern i belive with long tubes it will be alot worse without the cat.

With the long tubes, you just get more power.

I am not sure the power difference between the two since the SLP's have nice 1 3/4 primaries....arrrr.