lghtngyello03

iTrader: (44)

Alright, I've searched, and I have the tialsport spring rate chart.....but I want to know from experience from you guys, what is the better spring to run in my 50mm Tial BOV with GSC S2's. I have read that a bunch of guys are using the white spring with the S2's, and some use the black spring. Also have read that the black spring is too light?

I just got my car back together from a head gasket, head studs, springs/retainers, and S2 cam install..... and I am trying to get it ready for a retune. Idle seems to hang at 11(ish)in/hg.

I currently have an unpainted (-11psi) spring in at the moment from my previous 272s (which idled at -17in/hg.) I also believe that I have a white spring in my tool box from when I bought the BOV.

I see that the chart says a black spring (or -7psi spring) is suggested for vacuum reading @ -8in/hg to -13in/hg at idle. Knowing this, I have placed my order for black -8in/hg spring.


My question is, from experience which spring seems to work the best with this setup after a tune (I am on SD old mods in sig before new cams/springs etc) for you guys?? The white spring or the black spring with S2's?

Thanks in advance,
Scott

dr_latino999

iTrader: (12)

On a 2.2L with S2s, Idling around -11/-12 psi, my Tial QR utilizes the Black spring with no hiccups. Checking the spring pressure chart, the black looks like it will work just fine for you.

lghtngyello03

iTrader: (44)

Awesome Thanks for the first hand experience info.

vmrevo9

iTrader: (33)

Sorry for the bump, but how did the black spring work for you? I just picked up a Tial Q and I installed a white spring. My car idles at -6.8psi which is about 13.8in/hg. The valve stays closed at idle and seems to open when needed. The only complaint so far is that it either surges or flutters at light throttle building 1-5psi. I was wondering if the black spring would take care of this.