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lando981
Dodge Dakota
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3/11/2002
22:52:16
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 Subject: straight pipe???
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I have a 97 5.2 with a flowmaster and a bran new factory replaced cat. I was wondering if it would hurt my valves, engine, hp,trq if I were to put a straight pipe on it. Would it be any louder???? softer??? Any response is greatly appreciated, and thanx for the help!!!!!
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Dr.Dakota
Dodge Dakota
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3/13/2002
15:21:54
| RE: straight pipe???
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A straight pipe after the cat will just be noisy, without that much performance, you need some back pressure for proper valve closure. A straight pipe in place of the cat (meaning a straight pipe only), will burn your valves during hi rpm running and when you shut it down, cold air will rush in and crack your valves.
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lando981
Dodge Dakota
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3/14/2002
23:44:11
| RE: straight pipe???
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Message:
Thanx doc!!! I hope that it won't hurt my performance as wel as my 30k dak. engine. it just seems that my dakota is not loud enough, I think it's because my pipes are ran like a nova (at an angle blowing towards the ground) and... I think that adding a straight pipe will give me what I need as far as sound. I know that my 97 RC, 3.90 diff,5.2 FIPK flowmaster truck is not that fast but I want peolpe to be intimidated ya see... that way I don't have to race. Once again thanx for the much needed info!!!!
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Crusty
GenIII
3/15/2002
12:09:10
| RE: straight pipe???
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Message:
lando981- Dont be so hard on yourself, that truck is fast. Just needs to be uncorked a little. You essentially have a R/T motor, just with a little less power.
2002 CC 4x4 8.0L 6spd 4.56 LSD
Knobby Bumpy Tire Wheels, and one of them newfangled lift thingamajigs.
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Welks_97
Dodge Dakota
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3/15/2002
17:28:24
| RE: straight pipe???
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Here's what I did on my previous 97 5.2L:
1. I had the glass packs that were on it replaced with a pipe. The sound was awesome.
2. The stock cat went bad and I replaced it with a high flow cat that I bought from jegs. I, with out a doubt, had a power increase. I didn't notice a mpg increase or decrease. Once I had the high flow cat on there the exhaust was considerably louder. I set off a few car alarms.
I now have another 97 (I totalled the first) and I already have the pipe in there and am planning on getting the high flow cat again.
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JASON HALL
Dodge Dakota
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7/27/2004
15:37:02
| RE: straight pipe???
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would it hurt my truck if i cut off the muffler but leave the cat. would it also be loud
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huh
Dodge Dakota
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7/27/2004
18:38:38
| RE: straight pipe???
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Dr.Dakota
Exactly what do you mean about your statement "you need some back pressure for proper valve closure"? I thought valve spring pressure controlled valve closure.
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BOB P.
Dodge Dakota
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7/29/2004
02:17:44
| RE: straight pipe???
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Ditto. I have the same question Jason does. Would it hurt my truck if i cut off the muffler but leave the cat?
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big dawg
Dodge Dakota
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7/29/2004
20:23:53
| RE: straight pipe???
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i ran straight pipes on my 97 5.2L for 2 years before it got totalled and it ran good,never had a bit of problems
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bad dakota
Dodge Dakota
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7/30/2004
00:20:21
| RE: straight pipe???
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i have a 98 with a 5.2L and i have no muffler, just a cat and straight the rest of the way back. i have had no problem with it other than it seemed like it was a lil harder to start at a cold start but thats it, no biggy. i am thinking about cutting my cat and running straight pipes on it, cause i want it louder.
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NITE WOLF
Dodge Dakota
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7/30/2004
12:01:33
| RE: straight pipe???
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i have a 2000 dak with the 4.7,i cut the cat out and ran straight pipe into a 3" in and2 1/2 dual outlet flowmaster 40 series with no tailpipes or turn downs,real good rumble.
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Rule 01
Dodge Dakota
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8/02/2004
00:11:19
|  RE: straight pipe???
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listen,I have a 2002 dakota quad cab 4x4 with a 5.9 liter! I have many up grades and one of them is that I cut the muffler off about 12 inches after the cat.there has not been a single problem in 2 years. the only thing is it will have a little problem hitting overdrive.
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Scott
Dodge Dakota
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8/08/2005
15:59:05
| RE: straight pipe???
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i am cuttung the glass pack off and putting straights on my 99 dodge ram 2wd with the 318. will it kill my mpg? or my power?
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baddakota
Dodge Dakota
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8/08/2005
16:23:23
| RE: straight pipe???
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hey scott, i did that on my dakota and it seemed like it didn't hurt anything, but i was wondering if you had a cat and glass packs or no cat, because i am thinking of doing this to my ram.
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Sam
Dodge Dakota
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8/08/2005
19:12:42
| RE: straight pipe???
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The less restrictions on your engine the better, to a point. Scott, Putting straight pipes on your Ram in place of the glass packs will not do much besides for make it louder. Glass packs are already pretty unrestrictive so you wont notice any gains. On the other hand, if you had a muffler that you took off you will gain MPG and power.
Be careful, if you don't have enough back pressure you will lose low-end power. Also, you may trip a code when you take off the Cat because of the O2 sensor, you may need to get an O2 sensor simulator.
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Scott
Dodge Dakota
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8/10/2005
00:46:11
| RE: straight pipe???
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baddakota, i had glass packs with the cat because i have to have the cat in the county i live in.Also thanks Sam for your reply.I got the straights put on today and i cant tell any difference with the power or mpg so im happy with it also i wanted to know if anybody has had problems with the torque converter goin out?
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bad dakota
Dodge Dakota
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8/10/2005
12:55:45
| RE: straight pipe???
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what did it sound like with it like that. did it pop when you get on it like it would without the cat. or was it just loud.
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Scott
Dodge Dakota
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8/11/2005
12:48:58
| RE: straight pipe???
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there is alot of pop in it even at low rpms and it will blow eardrums out if u go about 40 and throw it in first gear because i got pulled by a cop for doing it.
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bad dakota
Dodge Dakota
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8/11/2005
18:33:39
| RE: straight pipe???
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so is it louder to quiter to you without the glasspaks, i'm getting some but i was just seeing which you thought was louder and sounded better.
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sicminds
GenIII
8/11/2005
19:37:32
| RE: straight pipe???
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Message:
i got a flowmaster 40 w/ no cat
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bad dakota
Dodge Dakota
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8/11/2005
20:03:02
| RE: straight pipe???
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hey, i forgot to ask but what size glasspacks did you have. the longer or shorter ones
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