Quote:
Originally Posted by LoSt180
I got mine installed, and honestly the vacuum at idle doesn't appear to have changed at all. I just have the stock S14 DIN gauge though, so the exact numbers are hard to translate (it's range is -/+ 700 mmHg). At idle, the vacuum is down to almost -700, lets call it .
|
I never saw such a strong vaccum on any SR. Is your stock ventilation hose (the hose beween valve cover MAF) still installed?
-700 =
-0.93 bar
Quote:
|
Anyone switched over to the new 258's that Tomei is putting out? I recently jumped over to them and am noticing some pretty crazy vacuum drop at idle. With the stock cam-shafts I was pulling -20 to -21(at sea level in Cali) no problem. I just switched over to the 258's and I'm barely pulling -14 now at idle. I had to bump my idle up to 950 rpms just to keep her stable.
|
I live in Switzerland, around 500m above sea level. With the stock cams and the tomei 256 aswell, I always had around -0.6 vacuum @ 850rpm.
With the 258 poncam it is way down to -5.2 at idle. However idle is fine. Timing is set to -15, no leaks.
@2000 rpm I'd -7.0bar with 256poncam. with 258poncam it is now -6.8bar @2000rpm.
I do not believe in a timing issue or leak. As for now I think going back to the 256poncam, since with the 258 change I have also changed the turbo from hks gtss to GTX2860gen II, which means i'll be unable to judge the cause of the loss in low or midrange.