 Extenal Wastegates |
 Nov 28, 2007 - 12:58 PM
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 Enthusiast  Joined May 16, '05 From Toronto, Ontario Currently Offline Reputation: 8 (100%)  |
ok.. so the wastegate actuator on my ct20b is fubared.. i get boost creep like crazi...
i was going to get an external wastegate to replace it and weld the internal one shut. i just hv a question about size. i was planning on getting a tial 38mm w/ either .5(7.252psi) or .6(8.702psi) bar... i hv an mbc and plan to run probably 10psi neway tho... however, the shop my car is at, a customer has a 48mm wastegate but wants a 38mm and he said that customer is asking if i want the 48mm turbosmart wastegate in exchange for a tial 38mm... i'm assuming 38mm is a good size for a 5sfte... would i b better off w/ the tial 38mm or the turbosmart 48mm? the 48mm seems kinda big... i'd possibly get a lot of lag? not sure what other pros/cons there would be between the 2? any help? thnx This post has been edited by elvasoshexai: Nov 28, 2007 - 12:59 PM -------------------- |
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Replies
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Dec 13, 2007 - 12:08 AM
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 Enthusiast Joined Feb 1, '05 From Charlotte NC Currently Offline Reputation: 14 (100%) |
Now, now, Jeunesse dont go starting fights lol..... Thanks Tony that clears it up alot for me, how can you tell if your wastegate is going bad? car wont build boost right? I think i was having this problem with my 3s, i just started noticing it before i got into my accident.
--------------------  QUOTE (Galcobar @ Oct 15, 2008 - 2:44 AM)  You want power but have no money. That's a problem. Cheap. Reliable. Fast. Pick two. |
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Dec 13, 2007 - 2:30 AM
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Enthusiast Joined Dec 2, '07 From Canada Currently Offline Reputation: 0 (0%) |
QUOTE(easternpiro1 @ Dec 13, 2007 - 12:08 AM) [snapback]622322[/snapback] Now, now, Jeunesse dont go starting fights lol..... Thanks Tony that clears it up alot for me, how can you tell if your wastegate is going bad? car wont build boost right? I think i was having this problem with my 3s, i just started noticing it before i got into my accident. Internal wastegates show a few symptoms of going bad... It works with a diaphragm that pushes a spring which in turn moves the wastegate flapper. If the diaphragm is ripped or leaking, then it will fail to properly push the spring to open the wastegate flapper. This would cause abnormal boost spikes and also boost creep. As RPM increases, the boost reference signal (vac line to wastegate) is leaked out and the diaphragm no longer does its job controlling the movement of the flapper properly. If the wastegate spring has fatigued from aging or thousands of heatcycles, then it you would get wastegate creep. This is when the wastegate flapper prematurely opens as exhaust pressure overcomes the fatigued spring in the wastegate, forcing it to open before it builds full boost. You will get a really laggy turbo and boost takes forever to build. -------------------- '94 Supra TT 6spd; AEM EMS, HKS T51R KAI BB; 737 WHP @ 23 psi
'94 Camry V6; AEM EMS, GT4088R; 520 WHP @ 26 psi '01 IS300; EMU, GT4088R; 381 WHP @ 10.5 psi '95 Integra GSR; AEM EMS GT2871R; 383 WHP @ 18 psi |
Posts in this topic
elvasoshexai Extenal Wastegates Nov 28, 2007 - 12:58 PM
OOBE Why 38mm? A 35mm is cheaper and capable of support... Nov 28, 2007 - 2:00 PM elvasoshexai tial don't make 35mm no more Nov 28, 2007 - 2:05 PM OOBE Get a 38mm then. Nov 28, 2007 - 2:06 PM elvasoshexai but if i get the 48mm there won't be any cons ... Nov 28, 2007 - 4:21 PM
rjbibeau just a dent in your wallet Nov 28, 2007 - 5:10 PM OOBE Dude, a 48mm wastegate hole is huge. You'll pr... Nov 29, 2007 - 12:17 AM Tony_the_Tiger QUOTE(OOBE @ Nov 29, 2007 - 12:17 AM... Dec 2, 2007 - 9:24 AM OOBE QUOTE(Tony_the_Tiger @ Dec 2, 2007 - 8... Dec 5, 2007 - 10:54 AM Tony_the_Tiger QUOTE(OOBE @ Dec 5, 2007 - 10:54 AM)... Dec 9, 2007 - 9:35 PM Kadett Why dont you just replace the broken actuator with... Dec 2, 2007 - 9:30 AM presure2 QUOTE(Kadett @ Dec 2, 2007 - 10:30 A... Dec 2, 2007 - 9:43 AM Tony_the_Tiger QUOTE(Kadett @ Dec 2, 2007 - 9:30 AM... Dec 5, 2007 - 10:49 AM LewFX check ebay for new and used forged products Dec 5, 2007 - 10:50 AM x_itchy_b_x 38mm works excellent for me. Dec 5, 2007 - 12:05 PM OOBE QUOTE(x_itchy_b_x @ Dec 5, 2007 - 11... Dec 5, 2007 - 12:28 PM easternpiro1 i was just asking myself what different size waste... Dec 10, 2007 - 12:31 AM Tony_the_Tiger QUOTE(easternpiro1 @ Dec 10, 2007 - 12... Dec 10, 2007 - 11:58 AM Jeunesse QUOTE(Tony_the_Tiger @ Dec 9, 2007 - 9... Dec 10, 2007 - 3:31 PM elvasoshexai QUOTE(easternpiro1 @ Dec 13, 2007 - 1... Dec 13, 2007 - 1:23 AM easternpiro1 i think that was what was happening to me, as i ac... Dec 13, 2007 - 10:17 AM lagos 99.999% of the time, the problem is something othe... Dec 13, 2007 - 4:18 PM easternpiro1 QUOTE(lagos @ Dec 13, 2007 - 4:18 PM... Dec 13, 2007 - 10:16 PM lagos when you set your boost you have to set it in 4th ... Dec 14, 2007 - 2:31 AM easternpiro1 it did go over 15 a few times but usually when it ... Dec 15, 2007 - 6:38 PM Punisher electronic boost controller FTW!!!11... Dec 17, 2007 - 1:02 PM easternpiro1 i dont know about EBC's too tempting i like ma... Dec 18, 2007 - 10:09 PM Punisher Yea.. I mean whats the point of an EBC really.. It... Dec 20, 2007 - 11:48 PM easternpiro1 QUOTE(Punisher @ Dec 20, 2007 - 11:4... Dec 21, 2007 - 8:43 AM |
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