kyle_h95 Posted May 28, 2015 Share Posted May 28, 2015 Hi guys, I currently have the stock dump valve on my starlet, bolts onto the standard efi pipe. But unfortunately where the plastic has got old it's cracked off and now leaking air, so when It dumps, the turbo is back spooling (instead of one air dump it's more like 4).Cars pretty standard, apart from toyoshite manifold and custom exhaust with a laser back box +decat Hks mushroom air filter (pointless because it's in the hot bay lol)Front mount intercoolerNow my question is...What are the pros and cons of having a dump, as far as my understanding:Pros: sounds awesome:DCooler air to inletConsSlightly laggier (if that's even a word)Bonus question- Better on or off? Cheers guys! Quote Link to post Share on other sites
ianmcintoshi Posted May 28, 2015 Share Posted May 28, 2015 A dumpvalve wont make your setup any laggier and it wont cool the air to the inlet either. What it will do is release the presure to the atmosphere when you throttle is closed, preventing it from going back through the turbo charger. Quote Link to post Share on other sites
daniel_g Posted May 28, 2015 Share Posted May 28, 2015 (edited) I dont run a DV and i prefer the flutter noise it makes.https://youtu.be/7EG01KS_VB4 Edited May 28, 2015 by daniel_g Quote Link to post Share on other sites
Calum122 Posted May 28, 2015 Share Posted May 28, 2015 I just leave mine to chatter cause it sounds awesome But on high performance cars, pushing serious boost, a dump is required to safely dump the intake gases. Quote Link to post Share on other sites
Markgtni Posted May 28, 2015 Share Posted May 28, 2015 im no expert but apparantly another pro is that it lets out the unused compressed air from the turbo, keeping the turbo from stopping spooling (under pressure from the compressed air) allowing it to spool up again even quicker, as apposed to not having 1.. and apprantly can add few extra hp too if ive been told right.. correct me if im wrong guys.. Quote Link to post Share on other sites
kyle_h95 Posted May 28, 2015 Author Share Posted May 28, 2015 Mine does the exact same calum, I thought that was turbo spinning backwards? Hmm, how do I go about removing the dump valve then? Quote Link to post Share on other sites
AdamB Posted May 28, 2015 Share Posted May 28, 2015 Wouldn't worry too much about the specifics of it for a road motor, or ones in which use sub £1000'ish turbo's. Just go with one that you like the sound of. When you start using BOV's to control boost or run large amounts of boost on turbo's worth more than the car, then I'd worry about it Quote Link to post Share on other sites
jayc-glanza17 Posted May 28, 2015 Share Posted May 28, 2015 Exactly what adam said..On a ct9 hybrid or td04, really no need to worry.. Quote Link to post Share on other sites
kyle_h95 Posted May 29, 2015 Author Share Posted May 29, 2015 Thanks guys, How do I go about removing my dump valve? Quote Link to post Share on other sites
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