What Wastegate Spring Size To Use?
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What Wastegate Spring Size To Use?
I have a Tial 38mm wastegate with .3bar spring (4.35psi) and using Utec BCS to control boost. I have one map which give me around 4.5psi in of of my Map running on wastegate spring and an 8psi map. I seem not to hold boost past 5700rpm and it drops to 6.8-7.2psi by redline. I'm planning to upgrade my spring to a .4bar or .5 bar which will give me 5.8 psi to 7.3 psi respectively. I'm thinking of getting the .5bar spring and I want to boost around 8psi but not sure if Utec BCS can reliably control a .7psi increase. I did some reading and found out that BC can control 1-3 psi increase better. Should I go with the .4bar spring instead?
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/\ I saw the Thread MRC created about your car. So you are running wastegate spring and no Boost controller? I wanted to run the .5bar spring since it will be stiffer and might help me boost sooner but I just want to run 8-8.5psi and not sure if utec can control that small increment. Ahsmo has the .4bar spring and he has the EVC6 and at 7psi he get a spike but at 8psi it is solid. I might endup just getting the .4bar spring have utec add the extra 2psi I need to hit 8psi.
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Originally Posted by athenG
/\ I saw the Thread MRC created about your car. So you are running wastegate spring and no Boost controller? I wanted to run the .5bar spring since it will be stiffer and might help me boost sooner but I just want to run 8-8.5psi and not sure if utec can control that small increment. Ahsmo has the .4bar spring and he has the EVC6 and at 7psi he get a spike but at 8psi it is solid. I might endup just getting the .4bar spring have utec add the extra 2psi I need to hit 8psi.
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