4 PSI vs. 8 PSI Valve Float?
4 PSI vs. 8 PSI Valve Float? I looked at my dyno graph from when i couldn't get the boost over 4 PSI. Well at 4 PSI the car made 360rwhp and 403rwtq. Which is close to what it should make with the TTI T76 kit through stock exaust i would think. But i figure, if the valve springs are that weak that when i turn the boost up to 8 psi and they float then theres still more power to be found at 4 PSI. But what i am getting at is the graph at 4 PSI was very smooth. It made power all the way up to about 5200 rpm and looked as smooth as my stock graph. But when i turn the boost up to 8 PSI it makes more power (381RWHP 468RWTQ)earlier in the rpm range but it falls off at about 4300rpm. Anyone think there could be anything else that could cause a drop like that by turning the boost up? I will post the dyno sheet soon. let me know what you think. I hope it's valve springs. Please tell me it is!!
The guy's at Livernois regularly get 500 out of that kit, and they have done it multiple times. I would say you have something going on. You might be getting knocked down by spark knock. How much timing are you running? Are you sure you are getting enough fuel?
-Geoff
-Geoff
The timing is set between 12-14 degrees and air/fuel is about 11.3ish all the way up. with 0 knock. I have not done a compression or leakdown yet. But i would think if the motor was hurt it would show all over the dyno chart. Could i be wrong? I will be doing the compression and leak down soon just to see,
