Boost Spike
#1
Boost Spike
I've always had this boost spike, at first I thought it was because I had my actuator line coming from the intake manifold, today I moved it to the turbo outlet and I've still got the same 2psi boost spike to 9 psi then it goes back down to 7 psi.
I've got a sr20 t25 on my 1.6 engine. The WG has not been ported yet, didn't know if it would need it or not being that it's off a nissan and I'm sure they don't make their cars with boost spikes. The nissan it came off of normally runs 7psi stock. At the time that was my goal. I also tried to up the boost a little to 8 psi, same result of a 2 psi spike to 10 psi. I have a slight preload on my actuator, it's not adjustable, however I would think that releasing some pressure off the rod would only lower my boost and still have the spike.
I can't think of anything else that would be causing it right now, I do have 3" straight through exhaust, I've read on here that free flowing exhaust makes boost spike worse but I don't have anything to restrict it right now. If I could make a baffle to stick in there to restrict the flow to see if the spike goes away it would pin point that it is indeed the waste gate being too small right?
I'd like to fix this asap so I can boost 10 psi this weekend weeeee!
I've got a sr20 t25 on my 1.6 engine. The WG has not been ported yet, didn't know if it would need it or not being that it's off a nissan and I'm sure they don't make their cars with boost spikes. The nissan it came off of normally runs 7psi stock. At the time that was my goal. I also tried to up the boost a little to 8 psi, same result of a 2 psi spike to 10 psi. I have a slight preload on my actuator, it's not adjustable, however I would think that releasing some pressure off the rod would only lower my boost and still have the spike.
I can't think of anything else that would be causing it right now, I do have 3" straight through exhaust, I've read on here that free flowing exhaust makes boost spike worse but I don't have anything to restrict it right now. If I could make a baffle to stick in there to restrict the flow to see if the spike goes away it would pin point that it is indeed the waste gate being too small right?
I'd like to fix this asap so I can boost 10 psi this weekend weeeee!
#5
The injectors are only running 46% duty cycle so your right there. I'm more worried about the motor, it's completely stock except for the turbo stuff. How much can that engine take anyway? I've heard more than 220hp is risky but I don't know how much boost I would need to be at that level.
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM