im about to purchase a tial bov. for my high boost turbo set up. only their asking what my vaccum reading is at idle and normal temp. i need this info so that i can choose the correct spring. any body got a turbo h22 with a vaccum/boost gauge?? could u please help me out?
thanx

 

I think at idle the vacuum should ALWAYS read between 18-22 in Hg. I'm pretty positive about that. I think thats most cars if not all cars.

 

18-22 Hg's ( Inches of mercury) my jdm h22 at idle was a 24 hg's.

 

Tisk Tisk

It should be around that at 2500 rpm maybe..... +/- 3 or so.

 

I thought the highest vaccum reading was at idle , because i know at wot there is little vaccum.
Remember all gauges dont read exactly the same.
Go hook up a vaccum gauge to your engine, vaccum should go down as rpms rise.
so go tisk tisk yourself

 

True.
At the highest load - vacuum is low
at the lowes load - vacuum is higher

All i'm sayins is that at 2500rpm the vacuum shouldn't be more than 3 in Hg out of that range.