Hello, before spending the $500-$1000 for good LT headers and labor and shipping, I wondered if anyone had recently dynoed a mild bolt on car before and after a LT header install. I have heard varying opinions on this, and talk is VERY cheap. I go by dyno results only, and dislike speculation on what parts "might" produce in rwhp as many ask before bolting on.....
Thanks for the insight.

 

nope heads,strokers and solid cams dont do much either!

 

the concept for headers is simple when you look at it froma broad point of view.... the easier let your exhaust out, the easier it is for you motor push it out. when it is easier you make more power.... anyone who says LTs arnt benificial is an idiot... they simply make it easier for exhaust gas to come up which frees up power... im sure someone will have a chart

 

smartass remark!! lotta air no flare.....

 

Everybody wants to be a smart butt. But not answer your question.

Yes, long tubes make real power on any LS1. Usually 20 rwhp or more.

 

I got about 25hp from my SLP LT's. The LS1's make power easily, and respond well to upgrades.

h3ll....a lid will net ya about 10hp! Inproving the exh flow is one of the best things you can do. Equal lenth headers provide equal bacpressure for each cyl and give it it's own port to flow through. Instead of it fighting w/ three other cylinders.


Like was said above, The more mods you do, the more the headers free up HP from those mods.

 

I use a liquid cam.

 

Definetly. Especially if you're going with long tubes.

 

Who cares about dyno #'s? Headers will make you faster!!!

 

Amen to that. I need to top off my fluid cam.

 

i dont have Dyno numbers of after my headers but i did gain .5 tenths and 4mph with just an LT install

Edit: thats without a tune to , soo i dont know how much power it takes to gain that much but im impressed

 

Even a set of mid-length headers (like the MACs) will give a good bump in power. Long-tube headers are one of the most documented modifications going for the LSx engines and well worth the money.

 

FWIW my dynoed 287 and 317 before headers. After header install (and on same dyno) I put down 294 and 307. What that doesn't show is that there was a loss somewhere in the neighborhood of 10 HP and just slightly more than that in TQ under the curve. I am going to have to go and get my dyno sheets from my storage unit to get the actual numbers but that is pretty close. Also my track times went from a 13.2 at 107 to 13.4 104. This is my personal experience and I have seen other cars do better. Not quite what I've seen on the internet but better none the less.

 

maybe im reading this completely wrong but your saying you lost 1/4 mile ET & MPH with headers?? then you say it was not as good as some of the results you have seen but better none the less?? I'm confused..

 

You need a tune. If you are untuned then you will run rich and destroy your gains. This is not normal and there must be a problem. Exhaust leak, untuned, sparkplug wire disconnected, etc. Most will gain 20-30rwhp with longtubes. Whoever says they won't show any gains is smoking. In fact, longtubes are one of the better hp makers for the LS1.