I did read through the Tuning Twins thread, and I kind of understood some of it, but honestly a lot of it went waaay over my head. I just swapped out my primary turbo, was running an HT3B, paired with an S300, that started life as a PDR towing twin setup.
It spooled pretty good, as it was, and I could run it up past 60 lbs of boost on the gauge, (gauge at the time maxed at 60) the needle would start wrapping around. I went ahead and bought a new gauge, 100 psi boost gauge, and then my buddy sent me another primary.
The setup I'm running right now is the S300 (57/65/13cm) over a Schwitzer (72/95/26cm non wastegated).
Until I read through the Tuning Twins thread, I never realized that there was tuning to do on compounds-I got the truck with them on it. The S300 has an internal wastegate, but there's no adjustability on the wastegate rod-so I'm looking into getting that replaced to be able to tune my secondary.
I don't have a drive pressure gauge right now, and I'm in the process of getting an aluminum bung, so I can install an interstage boost gauge-I figured I'd use my old 60 lb gauge that's sitting in the garage for that.
Since I put the new primary on, I've noticed that the truck struggled to get to 60 lbs of boost, and I would be running 1500-1600 on the pyro by the time I got there.
I started out trying to increase my fuel pressure, thinking maybe I was starving it out on the top end, and I went ahead installed the Tork Tek ofv 060, a 40 psi airdog spring, as well as running a dual feed to the pump (160 CA model pump)
When that seemed to help keep from flatspotting at the top of the RPM's, but didn't help with pyro or boost, I started looking harder online, and came across the Tuning Twins thread...read through it a couple of times, and still have a few questions.
I tried pinching off my wastegate line today, for a short period of time, and I found that the boost hit a lot faster, and my pyro was lower, running around 1100 degrees at about 55 lbs of boost overall.
So my understanding is I need to increase the preload on the wastegate on my secondary, to make it stay closed longer, to increase the boost, which will in turn drive the primary turbine faster...
I know I need more info than that, ie the interstage boost, and eventually a drive pressure gauge, but for now, that's what I think I need to do, off of what I've read and talked to a few of my buddies. Am I on track, or waaay off?
It spooled pretty good, as it was, and I could run it up past 60 lbs of boost on the gauge, (gauge at the time maxed at 60) the needle would start wrapping around. I went ahead and bought a new gauge, 100 psi boost gauge, and then my buddy sent me another primary.
The setup I'm running right now is the S300 (57/65/13cm) over a Schwitzer (72/95/26cm non wastegated).
Until I read through the Tuning Twins thread, I never realized that there was tuning to do on compounds-I got the truck with them on it. The S300 has an internal wastegate, but there's no adjustability on the wastegate rod-so I'm looking into getting that replaced to be able to tune my secondary.
I don't have a drive pressure gauge right now, and I'm in the process of getting an aluminum bung, so I can install an interstage boost gauge-I figured I'd use my old 60 lb gauge that's sitting in the garage for that.
Since I put the new primary on, I've noticed that the truck struggled to get to 60 lbs of boost, and I would be running 1500-1600 on the pyro by the time I got there.
I started out trying to increase my fuel pressure, thinking maybe I was starving it out on the top end, and I went ahead installed the Tork Tek ofv 060, a 40 psi airdog spring, as well as running a dual feed to the pump (160 CA model pump)
When that seemed to help keep from flatspotting at the top of the RPM's, but didn't help with pyro or boost, I started looking harder online, and came across the Tuning Twins thread...read through it a couple of times, and still have a few questions.
I tried pinching off my wastegate line today, for a short period of time, and I found that the boost hit a lot faster, and my pyro was lower, running around 1100 degrees at about 55 lbs of boost overall.
So my understanding is I need to increase the preload on the wastegate on my secondary, to make it stay closed longer, to increase the boost, which will in turn drive the primary turbine faster...
I know I need more info than that, ie the interstage boost, and eventually a drive pressure gauge, but for now, that's what I think I need to do, off of what I've read and talked to a few of my buddies. Am I on track, or waaay off?
