TIAL Wastegate spring tension.

[keef701]

Hi, I am currently getting together some parts to go single turbo in the future, I will be probably be going the GT3582 route, mounted to a cast manifold. The car will be a daily driver, so good spooling and reliability is more important than outright HP.

I am looking to buy a Tial 44mm wastegate, but what would be an ideal spring pressure to start with. It will also be connected to a electronic boost controller (AVCR), so I was thinking would a 0.8bar spring be a good start, and I could increase the boost with the controller, or should I start with a lower spring tension, and increase it more with the controller?

Can any of you lads that have gone single turbo with a similar setup, advise me before I order one?

Thanks.

[keef701]

Anyone?

 

Would I be right in assuming, that if I didn't have a boost controller, then I would control what level of boost I needed with the spring tension only?

[Stonkin]

Yes thats correct Keef. I would say a 0.8 spring would be advisable. I presume only if your running very high boost you would need something stronger, but i'm sure someone will advise who knows more than me

[keef701]

Just been searching on Supraforums, and the general understanding is that you could roughly double the standard spring rate if using a boost controller.

i.e, if you want to run a max boost of, say, 1.6bar choose a 0.8bar spring, and then adjust up to your max with the controller.

The spring rate on its own should give you somewhere close to minimum boost required (but it may depend on manifold and other exhaust restrictions, so may change by a few p.s.i)

In my case I would look to run about the 1.5bar mark, so a 0.8 spring would be a good starting point.