Dr. Wu 2000 said:I have been considering installing headers but my shop has told me
for the cost and the difficulty of removing the stock headers, the
gains are just not worth it. I have had a number of exhaust installers
tell me this, and that is thier business. Does anyone have solid proof
that they are worth the install. I can see maybe if you are supercharged
or have major mods, but for the normal bolt-on's, is it worth it?
Dr. Wu 2000 said:Sounds like if you do it yourself the cost is not a question, but what
about the power gains. Is it just SOTP or do you see good hp and tq
numbers. Mostly question for the bolt on guys. Any before and after
install numbers would be great. Thanx.
SR 97 GT said:My local shop wants $1400 for headers and a midpipe installed. Call me crazy but I think that's a bit high.
Dr. Wu 2000 said:I have been considering installing headers but my shop has told me
for the cost and the difficulty of removing the stock headers, the
gains are just not worth it. I have had a number of exhaust installers
tell me this, and that is thier business. Does anyone have solid proof
that they are worth the install. I can see maybe if you are supercharged
or have major mods, but for the normal bolt-on's, is it worth it?
2000GT said:This question comes up just about everyday and I won’t let you receive misleading opinions. I am assuming you are talking about longtube headers. People with LT headers will tell you it’s worth it and people without them (me) will tell you its not. Occasionally, you will get an honest answer out of someone that has LT’s and they will tell you it’s not worth it.
Here are FACTS:
1) you don’t just install LT headers by themselves. You also need to purchase a new mid-pipe so the cost does not just boil down to the headers alone. Oh, you will also need to purchase MIL eliminators or a chip because you will get a check engine light.
2) headers AND the new mid-pipe will produce nice gains on STOCK GT, however, most of the gain is from removing your stock mid-pipe (the one with all those cats) and not from the headers.
3) the best way to prove to you that the gains come from the mid pipe is too look at all the GT’s producing nice dyno results WITHOUT headers. Now compare those to the GT’s with headers. Even compare their trap speeds and you will see.
4) most GT’s with and without LT headers dyno between 250-260 SAE rwhp (I have yet to see one higher without internal engine work performed – cams)
5) my car does not have headers and it dynoed @ 250 rwhp SAE
6) tons of GT’s will dyno between 250 and 260 rwhp WITHOUT HEADERS.
7) the dyno curve with headers is the same without headers
Here are the MYTHS:
1) they produce more avg. rwhp.
2) they are needed on GT’s even if you plan on staying N/A
3) you can just buy headers by themselves and bolt them in.
Someone was kind enough to finally send me their Dynojet file with LT’s, o/r x pipe, Maganpacks and K&N filter. I will be posting their dyno graph and my dyno graph on Stangnet soon. I am still trying to figure out to post the graph and I am guessing I won’t get any help from the members with LT’s. If you are looking for good gains from headers, I strongly suggest you wait to see my graphs. Headers installed with a new mid-pipe will produce more power, but so will a mid pipe installed with you stock manifolds. You can get to 250-260 rwhp SAE without headers and it will save you money and time. That’s all I am trying to say.
I am not out to give you misleading info. I can admit when a mod. isn’t worth the money or time. In fact, I have C&L MAF. Don’t waste your money on one, the stock MAF is just fine if you plan on using bolt-on mods. for the life of your car.
mogs01gt said:if you don't want to post misleading opinions, then why post this opinionated bull'Kiss Me''Kiss Me''Kiss Me''Kiss Me'. How long have headers been around? How many of the fast 4.6s, 302, 351, 408s, 427s, 289s, ect ect. have headers? Look at any of the fast n/a 4.6 2vs, show me one that doenst have headers.
You can post your dyno and I will post mine and I guarantee mine will look better with only headers, chip and a POS CAI I had on for looks.
c2see21 said:i'll post some before & after dyno's very soon to put this to rest first it was my dyno's air brake wsa broke, now i have a crack in my passenger side header but i will get a before & after headers run no matter what. the new headers should get taken care of today if we do get it done today i'll try to get the sheets posted tonight, but it might be tomorrow before we get the new set of headers back on. so just bear with me & i'll put this argument to bed
(hopefully we get this done by the end of this week, cause i'm going down to florida on friday, so if it's not done by then, i'll have to wait until the next week to get it all done)
flipnsac said:Here are some pics of stock manifolds compared to some JBA Shortys. The stock manifolds are at the top of the pics, the JBA's are at the bottom. You can see how restrictive the stock manifolds are and why headers make the expulsion much better.
Jackie Chan said:This post is my example of 2000GT posting just to read his own
example of everything 2000GT says about Longtubes:
:
ok if you are going to be sarcastic.2000GT said:Jackie Chan - member of Stangnet since 10/17/02, 1115 posts, 2.22 per day
2000GT - member of Stanget since 11/30/99, 148 posts, 0.10 per day
Now which one of us makes posts just for the sake of posting? This is one of my rare posts that have nothing to do with the topic of this forum. You make non-technical posts constantly.
You're right, dyno results are worthless. Start a new thread about that when you get a chance.