montanajr Posted September 2, 2007 Share Posted September 2, 2007 Just noticed this today, very noticeable in 2nd gear. I plonk my foot down and the boost gauge reads 10psi constant up to around the 5k mark, then as soon as I hit slightly over 5k rev's it slowly decreases to around 5psi! So thats a drop of half boost! The turbo is a ct9a new from turbo technics in march (bill for over £600!) So I doubt its anything turbo related, what else could be causing it then fellas? Cheers, Chris Quote Link to post Share on other sites
StarletRick Posted September 2, 2007 Share Posted September 2, 2007 its the actuator matey, they do tent to let go at higher revs. Quote Link to post Share on other sites
montanajr Posted September 2, 2007 Author Share Posted September 2, 2007 Even though its not even a month old? Quote Link to post Share on other sites
StarletRick Posted September 2, 2007 Share Posted September 2, 2007 was it a brand new actuator? just because the tubby is new doesnt meant the actuator is. the stock ones ate shite mate.... Quote Link to post Share on other sites
lobotomy Posted September 3, 2007 Share Posted September 3, 2007 Either that or the turbo (because it's small) is just running out of puff higher up the revs. Quote Link to post Share on other sites
montanajr Posted September 3, 2007 Author Share Posted September 3, 2007 Its an HKS actuator I bought a month ago.... Quote Link to post Share on other sites
Glanza_Ragger Posted September 3, 2007 Share Posted September 3, 2007 Its an HKS actuator I bought a month ago....If youre running a new turbo, and hks actuator..Purchase an electronic boost controller.It will give stable boost pressures.Im assuming youre running youre boost pressure set straight off of the actuator arm? no eleccy controller.. Quote Link to post Share on other sites
montanajr Posted September 3, 2007 Author Share Posted September 3, 2007 Yup using the actuator alone, no MBC or EBC. Quote Link to post Share on other sites
Glanza_Ragger Posted September 3, 2007 Share Posted September 3, 2007 Yup using the actuator alone, no MBC or EBC.Though so.All actuators will leak pressure slightly.Best bet is to fit an electronic controller if you want a spot on setting.If youre running just an actuator set, it will vary slightly on hot and cold days.Also you may notice creeping, and boost drop off with out a controller. Quote Link to post Share on other sites
carter Posted October 7, 2007 Share Posted October 7, 2007 Just noticed this today, very noticeable in 2nd gear. I plonk my foot down and the boost gauge reads 10psi constant up to around the 5k mark, then as soon as I hit slightly over 5k rev's it slowly decreases to around 5psi! So thats a drop of half boost! The turbo is a ct9a new from turbo technics in march (bill for over £600!) So I doubt its anything turbo related, what else could be causing it then fellas? Cheers, Chrishay there mate i had the same problem its the sping in the actuator its gone weak so i got my self an hks actuator from www.starletgtturbo.co.uk for 85pounds and put that on and it fixed the problem and very pleased with it. the turbo is a lot more resonve now. that should fix the problem. hope that help you. tony Quote Link to post Share on other sites
Glanza_Ragger Posted October 7, 2007 Share Posted October 7, 2007 hay there mate i had the same problem its the sping in the actuator its gone weak so i got my self an hks actuator from www.starletgtturbo.co.uk for 85pounds and put that on and it fixed the problem and very pleased with it. the turbo is a lot more resonve now. that should fix the problem. hope that help you. tonyThe oem actuators are wank in general.They just lurrrve bleeding that boost off.Should be the first thing to change on every starbo Quote Link to post Share on other sites
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