Too much boost!
Thread Starter
Instructor
Joined: Oct 2016
Posts: 134
Likes: 11
Too much boost!
Why is my ECS supercharger putting out almost 12 lbs of boost? 07 LS2 with headers and off road x pipe. Stock ECS kit with 3.48 pulley and a 2.75 restrictor(yes restrictor is installed correctly) The only other thing that is changed is the car had an ATI balancer on it when I got it. I can't see a part number on it and it was too hot to measure it. My understanding is the base kit put out 8 or 9 lbs? It's had this issue since I put the supercharger on it 3 years ago. I'm switching the car to a SD tune and I'm starting to see some KR under boost. I had it in pretty good shape on the MAF tune but now it's back. I am going to put it on meth soon after I get finished with this tune. I have some Boostane I can dump in it for now.
Last edited by wilburbill; May 1, 2019 at 08:14 PM. Reason: Add information
Melting Slicks
Joined: Nov 2013
Posts: 2,049
Likes: 316
From: USA
Yeah, talking in terms of MAP or absolute pressure is much better. I'm at high elevation and I'm never sure if I should talk about boost relative to "standard" 14.7 psi atm pressure or 12.x psi that I see here.... MAP is what really matters and what's going on in the intake manifold.
Racer
Joined: Feb 2014
Posts: 466
Likes: 15
Boost pressure is MAP - barometric pressure. 170kpa is about 10psi if baro is 100kpa but usually only get baro like that at sea level. I am at 4k+ft and baro is usally 85-90kpa.
