I'm looking to get a different spring for my tial 38mm wastegate. I'm looking at the different springs on this site:

http://www.frsport.com/Tial-38mm-Ext...si_p_8967.html

When it says .6 BAR spring (8.7 psi) is max boost exactly 8.7 psi or is it around that general amount give or take .1 or .2 psi?

 

i have the 8.7 psi spring it goes to 8psi and stays there

 

I'm looking at getting a .5 BAR (about 7.2 psi) spring. So boost would probably stay at about 6.5ish?

 

your boost should be at least same as the wastegate spring ideally, but there are other variables that could affect boost. Boost creep is common, if you boost below your spring you might have a vacuum leak or the turbo is not making enough boost

 

sweet thanks for the info guys

 

Spring rate is affected by pressure loss in volume from tubing and intercooler size. Although the spring rate may be 8.7 psi, you may only see 8, or so on.

 

You want less boost? eeewww lol

 

well i'm putting in my s1 kit in december. right now i'm just getting together all the other parts for the complete picture (gauges, tranny cooler, finding a tuning shop). I've read every single thread on here and clubscion about turboing autos and it seems like even at 8psi the tranny will still slip after not that much time, so that's why i'm looking into to getting a .5 BAR spring instead of using the .6 BAR spring thats in the wastegate now.

 

Ahhh, auto trans. Now I understand. Hope all goes well!

 

yup yup. up next would be the manual swap cuz i was too stupid to get a 5 speed in the first place

 

2 speed powerglide and massive turbo ftw lol

 

what in the world is a powerglide?? haha

 

The auto trans from the corola fits into the tC right?

 

It's used for V8 1/4 mile cars RWD. Just a joke is all hehe.

 

i understood it was a joke... i thought it was some kind of lawnmower or something haha