Dump Pipe Possibilites - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

z32gizzle · 11-30-2005, 11:02 AM

K, so can someone explain what a dump-pipe does I went to a shop here in San Antonio,Tx and they told me they make some that reroute into ur exhaust and then they have some u can Fabricate and they just dump into the atmosphere pros and cons? Any info will help! Thanks

wootwoot · 11-30-2005, 11:27 AM

Pros are less exhaust restriction so technically more power but I dont know where or how much should be expected.
Cons are loud.
Dump tubes are required on an external waste gate set up, but an open dump is not. A dump tube is where the exhuast gasses go when routed through the wastegate around the turbo. An open dump is when these gasses are released straight into the atmosphere.

*NemeGuero* · 11-30-2005, 04:50 PM

I've got a dump tube that's about 3-4" long, and then just opens.

EchoOfSilence · 11-30-2005, 05:00 PM

i've seen dump pipes welded into downpipes... looks like it'll cause flow problems

z32gizzle · 11-30-2005, 05:16 PM

K, Well the only thing I've ever seen is the dump-tubes welded onto the downpipe..thats why I was wondering if its even possible to dump one into the atmosphere.. Where exaclty would I need to place the dump pipe and I just angle it down like almost out of engine bay or in engine bay cause I've hear the smell leakes throught the firewall if you keep it in engine bay.

*NemeGuero* · 11-30-2005, 07:23 PM

Mine points toward the bottom of the block.. I have no problems with it.

Evil98silvia · 12-01-2005, 08:43 AM

Mine also points to the bottom of the block and I have had no problems. It does sound good though and I did notice a quicker spool.

wootwoot · 12-01-2005, 09:53 AM

Strange you noticed the quicker spool, it technically should not change that at all... If the exhaust gasses are not going around the turbo through the wastegate and through the dump tube when you are "spooling" then how does that change anything from it being an internal wastegate? The wastegate is fully closed when you are spooling up so the wastegate you has does not really matter. This is unless you had a crappy old waste gate actuator before that wasnt working properly and not holding the gate shut =)

codyace · 12-01-2005, 10:25 AM

Re Routed Wastegate dumps should typically be 're introduced' to exhaust system somewhere on the downpipe. There is a 'prefered' distance (I believe 18'') but it really shouldn't make much difference. They are much quieter and preform well.

Now on my Altima, I ran an open dumptube. Loud as hell, and really took away from the sleeperness of the car. If I had to do the Altima again, it would certainly be re routed back into the downpipe.

(Excuse the dirty pre-fab downpipe...yuck!!!)

Evil98silvia · 12-01-2005, 01:13 PM

Mine was a crappy design. The dump tube was routed back into the DP about 4 inches from the turbo. The dump tube was also welded flat back onto the DP so it interupted the exhaust flow which is why it must have increased spool up. If my dump tube was further down the DP I wouldnt have noticed an increase. Anyways I have an HKS wastegate which has been good to me so far

Quote:

Originally Posted by wootwoot

Strange you noticed the quicker spool, it technically should not change that at all... If the exhaust gasses are not going around the turbo through the wastegate and through the dump tube when you are "spooling" then how does that change anything from it being an internal wastegate? The wastegate is fully closed when you are spooling up so the wastegate you has does not really matter. This is unless you had a crappy old waste gate actuator before that wasnt working properly and not holding the gate shut =)

11-30-2005, 11:02 AM	#1
z32gizzle Leaky Injector Join Date: Nov 2005 Location: Texas Posts: 117 Trader Rating: (1) Feedback Score: 1 reviews	Dump Pipe Possibilites K, so can someone explain what a dump-pipe does I went to a shop here in San Antonio,Tx and they told me they make some that reroute into ur exhaust and then they have some u can Fabricate and they just dump into the atmosphere pros and cons? Any info will help! Thanks

11-30-2005, 11:27 AM	#2
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	Pros are less exhaust restriction so technically more power but I dont know where or how much should be expected. Cons are loud. Dump tubes are required on an external waste gate set up, but an open dump is not. A dump tube is where the exhuast gasses go when routed through the wastegate around the turbo. An open dump is when these gasses are released straight into the atmosphere. __________________ I'm from Florida so I'm probably a bit more strange than you

11-30-2005, 04:50 PM	#3
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	I've got a dump tube that's about 3-4" long, and then just opens. __________________

11-30-2005, 05:00 PM	#4
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	i've seen dump pipes welded into downpipes... looks like it'll cause flow problems __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

11-30-2005, 07:23 PM	#6
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	Mine points toward the bottom of the block.. I have no problems with it. __________________

11-30-2005, 05:16 PM	#5
z32gizzle Leaky Injector Join Date: Nov 2005 Location: Texas Posts: 117 Trader Rating: (1) Feedback Score: 1 reviews	K, Well the only thing I've ever seen is the dump-tubes welded onto the downpipe..thats why I was wondering if its even possible to dump one into the atmosphere.. Where exaclty would I need to place the dump pipe and I just angle it down like almost out of engine bay or in engine bay cause I've hear the smell leakes throught the firewall if you keep it in engine bay.

12-01-2005, 08:43 AM	#7
Evil98silvia Join Date: Dec 2003 Location: washington DC Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	Mine also points to the bottom of the block and I have had no problems. It does sound good though and I did notice a quicker spool. __________________ Robbie C. KA-T

12-01-2005, 09:53 AM	#8
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	Strange you noticed the quicker spool, it technically should not change that at all... If the exhaust gasses are not going around the turbo through the wastegate and through the dump tube when you are "spooling" then how does that change anything from it being an internal wastegate? The wastegate is fully closed when you are spooling up so the wastegate you has does not really matter. This is unless you had a crappy old waste gate actuator before that wasnt working properly and not holding the gate shut =) __________________ I'm from Florida so I'm probably a bit more strange than you

12-01-2005, 10:25 AM	#9
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	Re Routed Wastegate dumps should typically be 're introduced' to exhaust system somewhere on the downpipe. There is a 'prefered' distance (I believe 18'') but it really shouldn't make much difference. They are much quieter and preform well. Now on my Altima, I ran an open dumptube. Loud as hell, and really took away from the sleeperness of the car. If I had to do the Altima again, it would certainly be re routed back into the downpipe. (Excuse the dirty pre-fab downpipe...yuck!!!) __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy