Rotary Car Club - View Single Post - EFR Internal Waste-Gate Discussion

jacobcartmill · 03-22-2014, 01:39 PM

well i finally have some info on this:

i was driving the car with the catalytic converter installed, and the boost didn't go over ~10psi. it opened at ~6psi and seemed to creep to about 10 and not go over that in 3rd and 4th gear.

so, last night i swapped out the cat with the straight pipe, and the internal wastegate is getting overrun at peak torque. the boost shoots up quickly and uncontrollably at 5500rpms and hits my 13psi boost safety fuel cut. i am going out shortly to raise the boost cut to 17psi and see if the boost gets up that far.

i had the pre-load set at 6mm initially, and the boost shot up, so i unloaded it down to 2mm and it does the exact same thing.

we also tested the wastegate with my air compressor to verify that it's opening fully. here's a video:
Wastegate movement - YouTube

TL;DR EFR IWG not keeping up.

03-22-2014, 01:39 PM	#44
jacobcartmill Rotary Fan in Training Join Date: Jun 2011 Posts: 50 Rep Power: 0	well i finally have some info on this: i was driving the car with the catalytic converter installed, and the boost didn't go over ~10psi. it opened at ~6psi and seemed to creep to about 10 and not go over that in 3rd and 4th gear. so, last night i swapped out the cat with the straight pipe, and the internal wastegate is getting overrun at peak torque. the boost shoots up quickly and uncontrollably at 5500rpms and hits my 13psi boost safety fuel cut. i am going out shortly to raise the boost cut to 17psi and see if the boost gets up that far. i had the pre-load set at 6mm initially, and the boost shot up, so i unloaded it down to 2mm and it does the exact same thing. we also tested the wastegate with my air compressor to verify that it's opening fully. here's a video: Wastegate movement - YouTube TL;DR EFR IWG not keeping up. Last edited by jacobcartmill; 03-22-2014 at 01:49 PM.