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kota on 20s
Unregistered
4/11/2001
19:05:37
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 Subject: y pipe
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Message:
in the future im planning on getting some headers, and i was wondering how much the y-pipe helps compaired to the stock one. how much horsepower can i expect and is it worth it? Also Is there any one who has a dakota with headers? if so is there a big difference in power? thanks
Eric 98 on 20s
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jsatter
GenI
4/11/2001
19:24:57
| RE: y pipe
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Message:
I'm so trying not to post a smartass reply.
01 Quad Cab SLT Plus 2WD Auto 4.7L - Currently Stock
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aggie97
GenIII
4/11/2001
22:55:24
| RE: y pipe
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Message:
Well, I was changing the oil on my Dak today and crawled around underneath getting acquainted with the old girl and I must say I am embarrassed by the Y pipe on my 5.9 QC. The thing looks like the tailpipe off a damn Kia or something. So, while lying on my back in disbelief, I formulated my new list of parts to buy over the next year, warranty be damned.
1. Doug thorley headers and y pipe
2. Crower 1.7 roller rockers
3. Hughes stage II or III Throttle body
4. Catback to listen to the music.
These items I think should give a severe awakening to this motor that seems choked at this point. If it is generating 245hp in this trim, I now know why my MPG is so bad. I can only bet that my smiles per gallon will go way up.
Need some input on this package to see if it is worth the bucks.
2000 QC 4x4 5.9 Black, no mods.....yet!!
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kota on 20s
Unregistered
4/12/2001
03:21:19
| RE: y pipe
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Message:
jsatter, do you know what a y-pipe is? if your not going to give me any info, dont post anything! if you want to make fun of people or make smartass replies go right ahead...just remember you will need something one day, and Ill be there to make a smartass reply right back at you.
aggie7-thanks for your info, I apreciate it.
Eric 98 dropped on20s
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Brad
GenIII
4/12/2001
11:55:48
| RE: y pipe
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Message:
I haven't heard of anybody having numbers on how much of a difference the y pipe makes, but if you have looked at the stock one it is amazing that these engines make as much HP as they do. I will definitely be replacing mine in the near future with the headers. I figure you are limiting the gains of the headers if you bottleneck it with the stock y pipe.
My $0.02
97 5.2L
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jsatter
GenI
4/12/2001
19:49:01
| RE: y pipe
IP: Logged
Message:
But I refrained!?!?
01 Quad Cab SLT Plus 2WD Auto 4.7L - Currently Stock
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jsatter
GenI
4/12/2001
19:50:29
| RE: y pipe
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Message:
And it was, "Also Is there any one who has a dakota with headers?" that I got a chuckle out of.
01 Quad Cab SLT Plus 2WD Auto 4.7L - Currently Stock
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aggie97
GenIII
4/12/2001
21:02:22
| RE: y pipe
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Message:
Brad, the standard unequal length headers do look great but from my experience in Mustangs, they don't do a thing for HP....2-5hp. On a mustang, the effort in doing this is NOT worth it. Equal length headers are the key so each individual exhaust pulse hits the collector at different times. When you are dealing with the Y-pipe collecting two headers, this problem is even worse...especially with the P.O.S. stock one on my truck. The hose on my vacuum cleaner is bigger!!! So, If you are going to buy headers and no y-pipe, I think you are tossing away money. I found the Dodge header and Ypipe for $450. Great deal but it is not jet coated. This will also not void the warranty maybe since it is a mopar part....who really knows? With the headers, roller rockers, and cat back I am guessing that I should be at or around 285-295hp with the 5.9L and the throttle body should let it breathe even better. This should make my stang start feeling sorry for itself.
For those of you with the 4.7's, I like the idea of a smaller more effecient motor but I am a guy that likes big jugs, big engines and big fun. Hey, I do have a sportscar with a little V8 though.....it runs pretty good too.
2000 QC 4x4 5.9 Black, no mods.....yet!!
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RonW
*GenIII*
4/12/2001
21:46:08
| RE: y pipe
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Message:
This will help if you've done other things. Breathing is right. These engines like to breathe but headers themselves won't give you a lot. You need the intake, TB, and cat back to complement the headers. That and the HP PCM. The next thing would be the RT heads. Follow that with a custom valve body and torque converter and you've got Zoom Zoom Zoom!
But I wouldn't go with Thorley headers. Go with Mike Leach (714) 639-5220. They're the manufacturers of the Mopar headers. $430 + shipping includes the Y-pipe and all bolts and gaskets. Jet coating will be another $225.
For the TB I've gone Flometrics billet TB. The catback is Borla, warranted for life. Intake can be K&N 57-1509 or the Mopar one. They're both the same, one has the K&N logo, the other has the Mopar logo. Costs are comparable.
If you get 1.7 roller rockers you'll need to get the Mopar valve covers or the baffles will get in the way. Also think about whether you want to do cam or not because you'll need to swap for 1.6 rockers with a cam.
If you can't afford the gas now, it's gonna get worse because with an HP PCM you'll need 92+ octane.
Good luck.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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aggie97
GenIII
4/13/2001
11:47:07
| RE: y pipe
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Message:
Ron, you are right, I meant the Mike Leach headers as they are the Mopar pieces. I will probably never do the cam because of the hassle in replacing it and the truck is still brand new..9k miles. I really don't want the chrysler PCM as I am going to tow alot with this thing and it is not recommended.
Is the stock catback that restrictive? I would imagine the choke point on my truck is the y-pipe. The entire exhaust behind that is larger in diameter than where the two down pipes meet!! Thanks for the mike leach $ as I am trying to find a link to order. For the catback, I am looking at the gibson split rear or the super truck setup. Flowmasters are too loud at highway but I am still looking for a kit from dynomax to fit the QC 4x4 with the 5.9L. I am kind of finding that the aftermarket is making parts for the 4.7 to catch up and kind of forgot the 5.9 in the QC. So, how does your 4.2 run?
2000 QC 4x4 5.9 Black, no mods.....yet!!
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RonW
*GenIII*
4/13/2001
12:07:35
| RE: y pipe
IP: Logged
Message:
Yes, the cat back is that restrictive. You'll get more out of a new cat back than you will out of new headers and Y-pipe. I would opt for cat back first. I installed a Borla cat back system. It's expensive but warranted for life. It may be louder than what you're looking for also. To order the headers you need to call Mike Leach and talk to Mike or Tom Fox. Their number is (714) 639-5220.
My 4X2 runs great! I'm starting to consider changing to the new RT heads. The RT has nothing to do with the Dakota R/T. Mopar just calls them RT heads. They're ported, polished, new valves and springs, etc. That's my current bottleneck.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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kota on 20s
Unregistered
4/13/2001
12:47:38
| RE: y pipe
IP: Logged
Message:
aggie7- what i ment when i said "does anyone have headers on their dakota's" was, out of the people who do have headers on their trucks, can they tell me what to expect on horsepower numbers. sorry i was not clear on that. but if you got a laugh out of that line, you probably dont get out much (seeing that you have a 2000 truck with only 9k miles on it, that kinda proves my point). I still dont know why you posted a respons scence you have NO mods done to your truck yet.
ron- thank you, you have been a great source for information!
Eric 98 on 20s
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CanDak
Gen III
4/13/2001
16:40:20
| RE: y pipe
IP: Logged
Message:
I installed Gibson headers on my 5.2, has better throttle response on the low end but didn't notice a big difference in the higher rpm range.
Also had to get them coated, too much heat under the hood killed my plug wires.
99 CC Sport 4X4, 5.2 Auto 3.55
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RonW
*GenIII*
4/13/2001
17:51:52
| RE: y pipe
IP: Logged
Message:
The length of the headers determines where the power range is.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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aggie97
GenIII
4/13/2001
18:50:05
| RE: y pipe
IP: Logged
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Kota on 20's, first of all it is aggie97, and if you think I posted anything in response to your post that was smartassed, go back and read the names on the responses, you obviously haven't yet.
As for the reason I posted a response is that I am interested in making smart decisions for upgrades and not spending a fortune on parts that do not work. I would hope you are here for the same thing. As for 9k on the truck, I just bought it new in December and it is only 5 months old. I also have two cars that I alternate from so if you are going to insult someone for not getting out much....fuck off!!!! Grow up and loose the chip off your shoulder and be productive or leave the forum. I am really disappointed at the attitudes that are being hosed on this site. Grow up and get some respect, register your user name so we know what generation you have....if you have one!!! Either post a question, answer one to help others, or just sit there holding your mouse in your hand and shut up!!!
Sorry for the sterness of the response there Team but I really don't like being criticized for something I did not do. Eat me Kota on 20's.
The only mod you have is the damn wheels and you probably spent too much on them and can't afford any other mod's. Also, learn to spell SINCE you seem like you are trying to make a point. I bet the Dak is your dad's and you draw pictures of it with 20'' wheels on it during your algebra class.
2000 QC 4x4 5.9 Black, no mods.....yet!!
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kota on 20s
Unregistered
4/13/2001
19:32:47
| RE: y pipe
IP: Logged
Message:
aggie97, I'M REALLY SORRY!! you are right, the posting was for jsatter. I know you were just tring to help, and I wrote it in a hurry before work.
As for registering, i have under dakota on 20s but I hate typing in the password everytime. If you read my postings I have stated that i have a 98, which would make it a gen III.
Mods are as listed: 4/6 drop, 20x8" wheels (got the set for $500 on a hookup,so no i didnt get ripped) color matched everything, shaved tailgate, molded in rollpan, leater seats, full sound system (also on a hookup) billet grill and lower valance, intake, t-body, cat-back gibson, tonneu cover, bed rug and clear corners.
future mods: full air ride, 1.7 rockers, and headers.
Eric 98 (gen III)
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aggie97
GenIII
4/13/2001
21:58:44
| RE: y pipe
IP: Logged
Message:
now you sound like a forum member....let's not make this forum personal. Welcome back! Sorry about the rest of the post, maybe it is male PMS.
2000 QC 4x4 5.9 Black, no mods.....yet!!
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Boomer
Unregistered
4/15/2001
12:35:56
| RE: y pipe
IP: Logged
Message:
I have a 97 w/ a 5.2, JBA headers, cat-back flowmaster duals (split rear). I didn't get a larger y-pipe because you'll loose low-end torque if you do. Ayone (like me) into 4x4'n or red light run'n will need that low end torque, it's not all horsepower you want, you gotta keep your torque up too (back pressure thing). After I get a cam kit& performance TB, then I probably would, but not before.
Those w/ headers and plug wire problems...buy a set of insulators (around $50).
Boomer
97 4x4, 5.2, dual flowmaster, JBA, K&N, 3.55 (soon to be 3.92)
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kota on 20s
Unregistered
4/15/2001
14:45:47
| RE: y pipe
IP: Logged
Message:
boomer, how much power did you get out of the headers? were they worth the money?
Eric
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Boomer
Unregistered
4/15/2001
21:09:11
| RE: y pipe
IP: Logged
Message:
I had the TB spacer, flowmaster and headers all put on at once, the power is noticeable, but not as much as i expected (Good choice in my opinion). The guy who helped me said that a performance TB would give just as much as the headers, but together they are awesome. He has a 99 Durango(5.2)with the works. I really can't say how much better it is, I had the truck a week, drove it 1100 miles, then pulled a 3500 lb trailer back, put a hole in the exhaust manifold, and now I have goodies. I actually rode around a week with the hole (sounded like it was going to explode), then 2 days with open headers WOW!!! It sounded like a dragster, w/o the power. My total time with the truck so far 2 months, 5,000 miles.
Boomer
97 4x4, 5.2L, JBA's, dual Flowmaster, K&N
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