Eboost users help please
Eboost users help please So i went and tuned the other day and we couldnt get it to boost steadily past ~7.5psi.I had the eboost2 hooked up using the method 1 way.So after that i changed the vacuum lines to method 2 way.Now i have too much boost.like i set it for 8psi and itll boost up to 12.5psi.My tuner made the tune nice and fat just for this reason if i run into issues.But can anyone shed some light on a possible solution?Ive already tried playing with the sensitivity and dropping it so it wont boost as high but that didnt work and ive also tried setting the gate to open sooner but nothing seems to work.help 
Nick
Nick So.....i tried unhooking the wastegate entirely so itd only run off the spring(supposed to be a 6psi spring) and i hit 12 psi.....then we tried hooking it back up and....well...for a brief second i believe ive set a record.....20 PSI on pump gas 
then the car proceeded to die....popped the hook and i blew the maf off the entire car....why in the **** would i hit 12 psi on a 6 psi spring using the wastegate only and why the **** would i hit 20 psi when my overboost setting is set to 12.2 please help
then the car proceeded to die....popped the hook and i blew the maf off the entire car....why in the **** would i hit 12 psi on a 6 psi spring using the wastegate only and why the **** would i hit 20 psi when my overboost setting is set to 12.2 please help if you look at the manual for the eboost2 its setup as method 2 for an external wastegate,for the vacuum source off the eboost2 directly its plumbed into the brake booster.im friggin lost.
First major rule: No boost controller will allow LESS boost than the wastegate minimum. If you have a 12psi spring and set an electronic controller to 8 psi....ya get 12. Get your wastegate working first, then the EB2 will be easy.
If you totally removed a boost source from the wastegate, then you'll overboost because nothing is pushing the gate open to allow boost to bleed.
If you totally removed a boost source from the wastegate, then you'll overboost because nothing is pushing the gate open to allow boost to bleed.
yes i know the rule about the wastegate spring,but i took out the spring and according the Tial's website its the 6 psi spring.i was under the impression that if the wastegate wasnt connected it just used the spring inside it as the boost "controller"
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Originally Posted by ddnspider
ok,thats understandable....but then why when connected through the eboost2 would i hit 20psi???
Take 5 minutes and put a Mityvac on the boost source hose to the gate...pump the MV and watch when the gate begins to open...look at the psi on the MV...this will get you close to the psi you should see.
Does your gate have an adjustable preload?
what are your setpoints at and what are your gate pressures? i assume you were using it at set point 1?
i also assume that the eb2 has the same set up as the 1 that i have.
i also assume that the eb2 has the same set up as the 1 that i have.
i dont have a mityvac unfortunately,lol.im not sure if the wastegate has an adjustable preload,i didnt see anything to indicate that.its a Tial 44mm gate.My set point 1 was for 9psi with the gate pressure @ like 7 psi or something,just to try and get a steady pressure instead of it going skyhigh,and the sensativity was at 20 then i dropped it to 10 and it still did nothing.Maybe today ill try and just hook up the wastegate with the 1 vacuum line and see what the eboost says for psi....ill report back this evening.Nick
quit ******* boosting the car till i put the wideband on it.. it is not tuned at anything past 7.5 lbs.. then you test.. and if you are doing anysort of questionable boosting with out race gas in the car i am gunna kick you in the *****
Originally Posted by blacktransam
quit ******* boosting the car till i put the wideband on it.. it is not tuned at anything past 7.5 lbs.. then you test.. and if you are doing anysort of questionable boosting with out race gas in the car i am gunna kick you in the *****
we completely destroyed 7.5 psi last night.
(on accident). 
yes....i must have purposefully been TRYING to hit 20 psi!!!!!!!!!i originally set the boost for 7 as set point 1 but it tried to boost higher than when i set it for 9 so thats why it was at 9 with the wastegate being told to open @ 7....and by the way...my overboost shutdown was set @ 11.2 which is 2.2psi above the set point where its supposed to be so i had it setup correct and setup safely.And Norris made the tune so that id be ok @ ~11psi in case we fixed the original problem....im searching right now for Tial's instructions on how to hook up just the vacuum line to run off the spring only.ill post back up later after i check and see if that worked.Nick
hmm turn the set point to 0psi
on mine it is incremental from 0 to 99, so i dont have problem of it saying one pressure and actually getting another.. i just put the increment to whatever number gives me the boost i want. maybe think about yours that way.
depending on the set up/wastegate/preload/controller it will hardly ever work out that setting the controller to 9 will give you exactly 9... more like set it to whatever that actually gives you 9.
on mine it is incremental from 0 to 99, so i dont have problem of it saying one pressure and actually getting another.. i just put the increment to whatever number gives me the boost i want. maybe think about yours that way.
depending on the set up/wastegate/preload/controller it will hardly ever work out that setting the controller to 9 will give you exactly 9... more like set it to whatever that actually gives you 9.
but if i have a 6 psi wastegate spring and @ "7 psi setting" im hitting 12 psi then how can i turn it down any farther since you cant boost lower than your wastegate spring?i dunno i think to start i found Tial's install instructions so im going to start with that and see if the spring will hold 6 psi and then if thats ok then ill move on to the EB2.ill keep you updated.thanks Nick