What would cause this?
Hey man, I spoke to forcedinductions today and they are saying that it's a back pressure problem with my setup being that I have a butt mount. I did a little research and it seems like STS kits have this problem so I'm going to try a 1.15 exhaust housing to get a little more room up top. Is there any chance that you might be having the same problem with your setup?
Hey man, I spoke to forcedinductions today and they are saying that it's a back pressure problem with my setup being that I have a butt mount. I did a little research and it seems like STS kits have this problem so I'm going to try a 1.15 exhaust housing to get a little more room up top. Is there any chance that you might be having the same problem with your setup?
I was just reading a thread on some other site where they were talking about preload:
even with the smallest amount of preload, with high oil pressure, and especially higher RPM where the lifter is getting filled quicker, it has a tendency to overcome some of the spring pressure and leave the valves open
IDK seems interesting... im am running a 10/30 oil right now and oil pressure is like 60+ at 3000 rpm up... im gonna switch to mobile 1 oil and a lighter weight and see if it will help... also waiting on a pushrod length checker.
If my preload is not right then it can be causing some valve float also...
Mine really looks like valve float and alot of experienced people say its valve float. So im gonna try some things and if it doesn't help ill buy some springs.
O ya when i had an sts kit on my ls1 with the garrett T70/.86AR and I didn't seem to have a backpressure problem... but idk, hope it will fix your problem!!!!
I didn't have as much of a problem with back pressure on my setup when I had the mp70 on it either. What I was told is that with the bigger turbo I'm flowing more air at a slower turbine speed so the turbine isn't spinning fast enough to help blead off the back pressure. I'm going to order the 1.15 housing and see if that helps.
