N80Jamie Posted January 28, 2011 Share Posted January 28, 2011 Basically all i want to know is the ins and outs of an external wastegate and screamer pipe. What is the difference between the internal wastegate, how do you if you have an external wastegate, what is a screamer and what does it do. Overall, what are the advantages of having an external wastegate with a screamer pipe? Hope you've understood what ive said Cheers, Jamie. Quote Link to post Share on other sites
ollie454 Posted January 28, 2011 Share Posted January 28, 2011 external waste gate holds boost better mate less chance of it creeping from what i understand. to have a external set up u will have to have a external gated manifold prob a boost controller of some kind hope that helps dudeollie Quote Link to post Share on other sites
N80Jamie Posted January 28, 2011 Author Share Posted January 28, 2011 external waste gate holds boost better mate less chance of it creeping from what i understand. to have a external set up u will have to have a external gated manifold prob a boost controller of some kind hope that helps dudeollieSo the wastegate then goes straight onto the pipe coming from the manifold? Does this make the 'dump' louder? Also, what is the screamer pipe there for? Thanks for the info by the way Quote Link to post Share on other sites
_shaun_ Posted January 28, 2011 Share Posted January 28, 2011 external wastegates give more accurate boost control. u dont need a boost controller u can run it from the wastegate spring u just have to buy the right spring for the pressure u want to use. screamer pipe bolts on to the wastegae and when u hit your set boost level the wastegate releases all the extra pressure down the screamer pipe making every1 in a 10mile radius think the world is ending . just have a look at your mani if it has 4 runners from the exhaust mani that go down in to the turbo that internal. but if theres 5 runners on the mani and the 5th comes from the turbo and has a big shiny thing on the end thats an external wastegate thats best way i can think of describe it lol but i might be slightly wrong ( i run an external tho) Quote Link to post Share on other sites
rorenapier Posted January 28, 2011 Share Posted January 28, 2011 Diffirence betweem the two is, the internal gate is part of the exhaust housing on the turbo, when you run an external gate, the internal one needs blocked off. Its easy to know if you have an exernal wastegate, it will be hanging around the manifold somewhere.Advantages of the ext wastegate, is far superior boost control, a boost controller can be used with one also.Screamer pipe is what vents the exhasut gasses to the atmosphere, once the spring inside the ext wastegate has reached its preset limit, it will start top compress which in turn will open the wastegate, given the wooshing sound.Basically all i want to know is the ins and outs of an external wastegate and screamer pipe. What is the difference between the internal wastegate, how do you if you have an external wastegate, what is a screamer and what does it do. Overall, what are the advantages of having an external wastegate with a screamer pipe? Hope you've understood what ive said Cheers, Jamie. Quote Link to post Share on other sites
Starbuck Posted January 28, 2011 Share Posted January 28, 2011 a screamer pipe will make the car louder under boost as the gases escape or you can have it plumbed back into the exhaust. I have a EWG setup coming for my GT. Quote Link to post Share on other sites
N80Jamie Posted February 7, 2011 Author Share Posted February 7, 2011 Bit of a bump! Ok cheers for that. Final question, do you not here the dump as much when it is externally gated? Only reason i ask is because from the videos ive seen, you can hear the louder noise of the car while boosting but then next to no 'dumping' Cheers! Quote Link to post Share on other sites
Whitegv Posted February 7, 2011 Share Posted February 7, 2011 the dump is from the dump valve not the wastegate mate, the wastegate lets out exhaust gasses when it reaches its set limit.the dump valve lets out the air already compressed by the turbo when it isnt needed, probably cant hear because the car sounds louder Quote Link to post Share on other sites
N80Jamie Posted February 7, 2011 Author Share Posted February 7, 2011 the dump is from the dump valve not the wastegate mate, the wastegate lets out exhaust gasses when it reaches its set limit.the dump valve lets out the air already compressed by the turbo when it isnt needed, probably cant hear because the car sounds louderBut from the pictures ive seen it looks like the dumpvalve is on the end of the extra runner that comes from the external wastegate manifold? Am i right in saying that or is that something else? (Ill get there eventually) Quote Link to post Share on other sites
JackStar Posted February 7, 2011 Share Posted February 7, 2011 The 'dumpvalve' that you mean is the wastegate itself, thats the part that controls the boost, it will open when the set pressure is reached, this is a seperate thing from the dumpvalve altogther.Jack Quote Link to post Share on other sites
Whitegv Posted February 7, 2011 Share Posted February 7, 2011 na mate, thats the wastegate itself.you have your 4 runners that come out the head, which go to the turbo exhaust side, just above the turbo where all 4 runners come into 1, you will have the other runner, usually which will either stick out to the front of the car, or like mine the side of the engine (wepr kit) that you bolt your wastegate to, then you have the screamer coming from the other side of the wastegate.it hasd a spring and a diaphram inside it that when the boost reaches the desired level it will release the exhaust gasses, works basically the same as an actuator, but alot better and more controlable.you weld the internal wastegate shut. dumpvalve is on the intercooler pipework Quote Link to post Share on other sites
N80Jamie Posted February 7, 2011 Author Share Posted February 7, 2011 Ahh i get it now! I was getting mixed up between the wastegate and dumpvalve! I think i may go down this route, how much are these setups in comparison to internally gated setups (including the welding of the internal wastegate, manifold, wastegate itself etc)? Quote Link to post Share on other sites
Starbuck Posted February 7, 2011 Share Posted February 7, 2011 Welding the turbo cann be about £20 unless you know someone. Wastegate like a Tial 38mm from £135 secondhand. EWG Mani about £200give or take. Quote Link to post Share on other sites
N80Jamie Posted February 7, 2011 Author Share Posted February 7, 2011 Welding the turbo cann be about £20 unless you know someone. Wastegate like a Tial 38mm from £135 secondhand. EWG Mani about £200give or take.Think i'll definitely consider this in the next few months then! Cheers! Quote Link to post Share on other sites
Starbuck Posted February 7, 2011 Share Posted February 7, 2011 This is the setup i'm getting. Although i'm not getting a screamer pipe.http://www.wepracing.com/engine/turbo-a-ma...t9-power-up-kit Quote Link to post Share on other sites
N80Jamie Posted February 7, 2011 Author Share Posted February 7, 2011 Tarts up the engine bay along with improving boost control.. Full of win Quote Link to post Share on other sites
Starbuck Posted February 7, 2011 Share Posted February 7, 2011 indeed! Quote Link to post Share on other sites
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