Eboost2 users please help
01-12-2014, 03:08 PM
#1
Eboost2 users please help Am having a little trouble getting boost to stay constant as Rpms rise. Car will boost to 18, then settle in around 14-15 as Rpms come up. I have my dc at 60, gp at 14.5 and sensitivity 20. Should I raise the sensitivity to make it quicker to respond? Or am I thinking incorrectly? Please help if anyone knows anything about this. Thanks.
01-12-2014, 06:22 PM
#2
9 Second Club
GP should be set approx 5psi below target boost pressure. You seem to have it set at target ( ie 15psi ? )
That could cause the spike you see.
Likewise, sensitivity too high could also cause spikes or erratic control. Reduce both until you have good stable boost control, and then try increasing the sensitivity a little.
That could cause the spike you see.
Likewise, sensitivity too high could also cause spikes or erratic control. Reduce both until you have good stable boost control, and then try increasing the sensitivity a little.
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01-13-2014, 03:50 AM
#9
9 Second Club
Exactly how have you the gate plumbed ? That will have a huge impact on how it works
And no, do not raise the GP until you have stable boost. Leave it low to start with
If boost is dropping off slightly at high rpm, you could raise the sensitivity a little.
And no, do not raise the GP until you have stable boost. Leave it low to start with
If boost is dropping off slightly at high rpm, you could raise the sensitivity a little.
01-13-2014, 12:00 PM
#11
9 Second Club
I see none in the instructions specifically called "high boost". Exactly how is it plumbed ?
DC is the main factor in determining overall boost pressure. ( if we ignore the plumbing aspect ).
GP effectively blocks any signal to the gate until that pressure is reached. This can help spool, but it can also lead to boost spikes. So if too high it can cause problems, so always start low.
Sens is to try and help maintain boost if it is dropping off at high rpm. But again, if this is too high it can cause erratic boost too. So again, always start low.
01-13-2014, 12:22 PM
#12
I see none in the instructions specifically called "high boost". Exactly how is it plumbed ? DC is the main factor in determining overall boost pressure. ( if we ignore the plumbing aspect ). GP effectively blocks any signal to the gate until that pressure is reached. This can help spool, but it can also lead to boost spikes. So if too high it can cause problems, so always start low. Sens is to try and help maintain boost if it is dropping off at high rpm. But again, if this is too high it can cause erratic boost too. So again, always start low.
01-13-2014, 03:54 PM
#16
9 Second Club
OK...back to the beginning.
You have a 6psi spring.
What is the lowest boost you realistically expect to be using ? And likewise, the most ?
That plumbing method will likely be the most difficult to achieve good smooth boost. So unless you really intend to be running a lot of boost relative to the spring, I would not be choosing it.
Really you'd be choosing that to overcome lots of backpressure which is artificially blowing the gate open, so you revert to blowing into the top port inly ( which is what will happen at 100% DC with that plumbing )
So at some interim levels between low and maximum, it will take a lot of effort from the controller to achieve steady boost.
You have a 6psi spring.
What is the lowest boost you realistically expect to be using ? And likewise, the most ?
That plumbing method will likely be the most difficult to achieve good smooth boost. So unless you really intend to be running a lot of boost relative to the spring, I would not be choosing it.
Really you'd be choosing that to overcome lots of backpressure which is artificially blowing the gate open, so you revert to blowing into the top port inly ( which is what will happen at 100% DC with that plumbing )
So at some interim levels between low and maximum, it will take a lot of effort from the controller to achieve steady boost.
01-13-2014, 04:30 PM
#17
OK...back to the beginning. You have a 6psi spring. What is the lowest boost you realistically expect to be using ? And likewise, the most ? That plumbing method will likely be the most difficult to achieve good smooth boost. So unless you really intend to be running a lot of boost relative to the spring, I would not be choosing it. Really you'd be choosing that to overcome lots of backpressure which is artificially blowing the gate open, so you revert to blowing into the top port inly ( which is what will happen at 100% DC with that plumbing ) So at some interim levels between low and maximum, it will take a lot of effort from the controller to achieve steady boost.
01-13-2014, 04:44 PM
#19
9 Second Club
The new plumbing should be easier to achieve good control, and it should cover the range you need.