For Those of You That Have Wastegates Dumping Into Your DP...
05-17-02, 04:42 PM
#26
Chicharrones Rule!!
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Originally posted by canman6969
Over here, curcuit racers always route there wastegate back into the DP. Now drifters, street driver, and drag racers usually have open air wastegates.. I was told its not power, but responce, you dont need all that much responce on a track, but you do doing the other types of racing. Also with an open air wastegate, you lose a minor amount of gas milage, but you guys know how curcuit racers are, I wish I didnt have to stop for gas...HAHAHA so they save every drop
Over here, curcuit racers always route there wastegate back into the DP. Now drifters, street driver, and drag racers usually have open air wastegates.. I was told its not power, but responce, you dont need all that much responce on a track, but you do doing the other types of racing. Also with an open air wastegate, you lose a minor amount of gas milage, but you guys know how curcuit racers are, I wish I didnt have to stop for gas...HAHAHA so they save every drop
Thanks for the info.
-E
05-17-02, 04:51 PM
#27
For the flex pipe:
http://www.wholesalehyperformance.com/hks-waste.html
http://www.lmsspeed.com/hksWastegatePrices.htm
I don't see much benefit to the flex pipe except if you change out your exhaust often (like myself).
It's the only reason why I'm going to run a flex dump pipe this time around.
Plumbing the wastegate dump into the exhaust has 2 benefits:
1) Reduce noise when the wastegate opens up at high duty cycle
2) Create some turbulence in further into the exhaust stream. I can't remember which turbcharger book talked about it (Maximizing Boost?). The skinny is that a little turbulence is actually good for turbocharged vehicles.
cons:
1) More fabrication (labor)
2) No annoying WOT noise
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
http://www.wholesalehyperformance.com/hks-waste.html
http://www.lmsspeed.com/hksWastegatePrices.htm
I don't see much benefit to the flex pipe except if you change out your exhaust often (like myself).
It's the only reason why I'm going to run a flex dump pipe this time around.
Plumbing the wastegate dump into the exhaust has 2 benefits:
1) Reduce noise when the wastegate opens up at high duty cycle
2) Create some turbulence in further into the exhaust stream. I can't remember which turbcharger book talked about it (Maximizing Boost?). The skinny is that a little turbulence is actually good for turbocharged vehicles.
cons:
1) More fabrication (labor)
2) No annoying WOT noise
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
05-17-02, 04:55 PM
#28
Chicharrones Rule!!
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Originally posted by AJatx
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
-E
03-31-06, 01:28 AM
#29
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Originally Posted by AJatx
For the flex pipe:
http://www.wholesalehyperformance.com/hks-waste.html
http://www.lmsspeed.com/hksWastegatePrices.htm
I don't see much benefit to the flex pipe except if you change out your exhaust often (like myself).
It's the only reason why I'm going to run a flex dump pipe this time around.
Plumbing the wastegate dump into the exhaust has 2 benefits:
1) Reduce noise when the wastegate opens up at high duty cycle
2) Create some turbulence in further into the exhaust stream. I can't remember which turbcharger book talked about it (Maximizing Boost?). The skinny is that a little turbulence is actually good for turbocharged vehicles.
cons:
1) More fabrication (labor)
2) No annoying WOT noise
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
http://www.wholesalehyperformance.com/hks-waste.html
http://www.lmsspeed.com/hksWastegatePrices.htm
I don't see much benefit to the flex pipe except if you change out your exhaust often (like myself).
It's the only reason why I'm going to run a flex dump pipe this time around.
Plumbing the wastegate dump into the exhaust has 2 benefits:
1) Reduce noise when the wastegate opens up at high duty cycle
2) Create some turbulence in further into the exhaust stream. I can't remember which turbcharger book talked about it (Maximizing Boost?). The skinny is that a little turbulence is actually good for turbocharged vehicles.
cons:
1) More fabrication (labor)
2) No annoying WOT noise
Enuttage, I can refer you to a couple of guys in Austin for good muffler work.
J
03-31-06, 05:29 PM
#30
RX6 - The wastegate sucks in my opinion. A friend blew his engine when it stuck open. I put a Tial 46mm on mine.
Or go even bigger, like a HKS 60MM WG. It really helps your top end with a restrictive turbo like the RX6.
I have an open vented HKS GT 60mm WG on my stock hybrid (clipped "P" trim wheel in T3 sized 1.0 AR '89 TII housing) and it doesn't feel like it falls off at all up to 8,500rpm redline. I am curious to see how it does drop off on a dyno sheet.
Or go even bigger, like a HKS 60MM WG. It really helps your top end with a restrictive turbo like the RX6.
I have an open vented HKS GT 60mm WG on my stock hybrid (clipped "P" trim wheel in T3 sized 1.0 AR '89 TII housing) and it doesn't feel like it falls off at all up to 8,500rpm redline. I am curious to see how it does drop off on a dyno sheet.
04-01-06, 12:35 AM
#31
development
if you are running a small turbo, there is no need for a big WG...big WG's are for turbo's that are running low boost...or start the tuning way low...ie, "My what a big wastegate you have...the better to vent LOTS of exhaust with"
if you are running a correct size turbo at the correct pressure...a small WG will perform beautifully.
on the other note...I run a high flow cat with my single...and seem to pick up some "seat of the pants pull" with plumbing the WG in. It comes in at a 45 degree angle and the turbulance breaks up the exhaust whirl wind from the turbine and seems to flow thru the cat element better.
call me crazy but my car feels faster, so quiet too with the cat, WG, air tube, resonator, and muffler all in the exhaust
if you are running a correct size turbo at the correct pressure...a small WG will perform beautifully.
on the other note...I run a high flow cat with my single...and seem to pick up some "seat of the pants pull" with plumbing the WG in. It comes in at a 45 degree angle and the turbulance breaks up the exhaust whirl wind from the turbine and seems to flow thru the cat element better.
call me crazy but my car feels faster, so quiet too with the cat, WG, air tube, resonator, and muffler all in the exhaust
04-05-06, 12:07 PM
#32
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Originally Posted by dubulup
call me crazy but my car feels faster, so quiet too with the cat, WG, air tube, resonator, and muffler all in the exhaust
04-05-06, 06:19 PM
#34
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Blue TII quote "Or go even bigger, like a HKS 60MM WG. It really helps your top end with a restrictive turbo like the RX6."
The point he is trying to make is that a really large waste gate can bypass more exhaust energy past the smallish turbine housing on the rx6. Therefore the turbine won't be nearly as much as a restriction, there fore not making the turbo fall off in the topend.
The point he is trying to make is that a really large waste gate can bypass more exhaust energy past the smallish turbine housing on the rx6. Therefore the turbine won't be nearly as much as a restriction, there fore not making the turbo fall off in the topend.
04-06-06, 08:24 AM
#35
Round&Round not Up&Down
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Would an open dump WG affect the AFR? My WB O2 sensor is 27" downstream from the turbo and I am considering the open dump for simplicity's sake.
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