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Started setting up an Eboost 2 to work so I can push my limits soon and not rely on the spring or a MBC. With the Eboost2 off, I get 8-9 PSI. Once I put in the generic settings, I can get a 2 PSI gain to 10-11 PSI total boost. My problem seems to be though my if I hold WOT and row through the gears, the boost spikes to 15ish PSI and then settles down to 10 PSI at the high end of the RPM range.
What I have a is the Eboost2 set up as follows:
I have the boost solenoid connected to boost pressure right off the turbo housing which T's into the lower port.
Any thoughts? 44MM Tial MVR gate, in the right place, PTE 7675. I do not get boost creep on WG spring.
What does the curve look like at higher rpm? What size spring?
I have a T7575 on a 5.3l, turbosmart 50mm gate and had the same issue with a 7lb spring. Hooked up the rpm signal on the EB2 and used the boost correction function and that fixed it. Running a 10lb spring now tho and don't have that issue with no correction.
fixed. Had the solenoid about 3-4 feet away. the length of hose (rubber) was causing some delay in response by pressurizing all that hose plus it has a fair amount of give.
Made the hoses 2 feet, problem solved. Simple physics and plumbing. made a few solid road pulls, hitting proper boost levels and holding like a rock. Eboost 2 kicks ***!
Don't use the sensitivity feature in the eboost2, at least I never did when I ran it. The gate pressure should be about 10psi away from your target, and that will help minimize spikes when the boost comes in.
Its a great controller, just have to take a sometime to learn how to use.
My pulse/boost leash literally tells you to have like 4-6’ between the map and boost reference, and more doesn’t hurt. Guess it depends on the controller setup
My pulse/boost leash literally tells you to have like 4-6’ between the map and boost reference, and more doesn’t hurt. Guess it depends on the controller setup
4-6 feet ? That's dumb. They must be trying to dampen or filter something by that crude method.
Although that has nothing whatsoever to do with the line for the wastegates/solenoids.
System works the same way with boost pressure as the pressure source. You don’t change the gate to noids distance based on what your using for control pressure. Same stands for the map sensor, not sure why you’re hanging on that.
I remember reading an article somewhere that the vacuum/reference lines didnt have an effect on performance until you got above like 20-25ft.
Would depend on size and type of the line....but in the case of lines for boost control and wastegate/solenoid...yes it does make a difference as the OP has already proved.
Would depend on size and type of the line....but in the case of lines for boost control and wastegate/solenoid...yes it does make a difference as the OP has already proved.
Meet......
Originally Posted by Cwarta
ive seen that as well and tested it on my own car with 1’ of Line and 15’ of line, no difference.
Annnnndd....GO! I wasn't arguing 1 way or the other, just found the read interesting. I thought it was from Turbosmart or someone like that.
im pretty sure most models of very low pressure pneumatic systems (like air brakes on trucks or the doors on a subway car, for example) pretend air is non compressible, for the fact that with the small volumes and flow of the system the compression is negligible.
get up past a couple hundred psi and yeah air is springy
08-28-2018, 01:09 PM
Eboost 2 Spike at WOT 
I wasn't arguing 1 way or the other, just found the read interesting. I thought it was from Turbosmart or someone like that. 