what numbers are people using for the pressure vs. duty cycle? the numbers that are pre-programed in indicate that as pressure rises the duty % goes up. if im using a gm boost solenoid...would it be the other way around (as pressure goes up...duty% goes down)? also, will i have to play around with the pressure vs. duty #'s or is it a set?

 

you have to set your boost vs duty cycle yourself on the dyno or on single gear pulls. each setup is different. put it on set duty cycle and make single gear pulls, each with a higher duty cycle and record how much boost is with each duty cycle. then, in the boost vs duty cycle, you enter how much boost it made for each duty cycle. once that is done, you can just tell it how much boost you want in each gear and what rpm

 

thats exactly what i needed to know. im going to work on it at the track today and see what happens. thanks for the help.

 

can you enter a boost number in the controller chart that is between the boost and % numbers in the reference table and it do that boost? Ive tried itbut don't really know if it works all that well in guessing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SPOOLINmatt &raquo;</TD></TR><TR><TD CLASS="quote">can you enter a boost number in the controller chart that is between the boost and % numbers in the reference table and it do that boost? Ive tried itbut don't really know if it works all that well in guessing. </TD></TR></TABLE>
i'm not exactly sure what you are asking. the way it works is that a certain duty cycle makes certain boost pressure. every car is different though. you enter what how much pressure each duty cycle makes, and it uses that as a reference for when you tell it how many psi you want to make.

 

if you put in the table

15% 20%
20psi 28psi


could you put in 24 psi on the boost tables and it produce that pressure without it being in the reference table?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SPOOLINmatt &raquo;</TD></TR><TR><TD CLASS="quote">if you put in the table

15% 20%
20psi 28psi


could you put in 24 psi on the boost tables and it produce that pressure without it being in the reference table?</TD></TR></TABLE>
if you set it like that, when tell it to make 24psi, it is going to think 24 psi is 17-18% duty cycle. it will trigger the solenoid to run at 17-18% duty cycle.then it will make whatever boost is at 17-18% duty cycle. that is why i say each setup is different. if you have a 10psi wastegate spring, the duty cycle is going to be different than a spring that is 20psi. also, different solenoids will react different to duty cycle. i.e., one might start raising the boost at 20% duty and stop raising at 80% duty where the next one might start raising boost at 50% and stop raising boost at 90%.each setup is different. if you set it up right, all you have to do is tell it what boost you want. it works great. i just changed my wastegate setup. i am making a trip to the dyno next week to setup the boost again.

 

what pressure do you use to activate the solenoid? also, i have a 10 psi spring and cant get the boost above 20psi. do you normally only get double the spring pressure?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">what pressure do you use to activate the solenoid? also, i have a 10 psi spring and cant get the boost above 20psi. do you normally only get double the spring pressure? </TD></TR></TABLE>
I have it set to activate at 2psi. With my old setup, I was using a 10psi spring and have made as much as 40psi. I haven't tried turning it any higher because I have had problems with it blowing the spark out. What solenoid are you using?

 

im using a gm solenoid and a 35mm gate for now... the gate does have a top and bottom port but i am only using the bottom. My gate line goes from the gate to the solenoid then to a vacuum. right now at 20% duty its gets 20psi. at 15% we still get 20 psi!

 

i used the gm solenoid and had problems, although it worked decent. now i am using an AEM solenoid.it may be that you haven't reached the point where it starts increasing boost. there will be a dead point from 0-whatever% where it won't do anything and there will be a point from whatever%-100% where it will stop raising the boost. i don't think mine does anything until 30%, and I think it was even higher with the gm solenoid
if you go in the help file, it has a diagram showing vacuum routing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">im using a gm solenoid and a 35mm gate for now... the gate does have a top and bottom port but i am only using the bottom. My gate line goes from the gate to the solenoid then to a vacuum. right now at 20% duty its gets 20psi. at 15% we still get 20 psi!</TD></TR></TABLE>
any reason you are not using both? Which you should be in opinion...

 

i will be changing the vaccum line setup tonite and see if i get any more boost. Should i try lowering the % the 5 or 10% and see if thats raises boost. it just seems im having to run alot of duty cycle just to double the spring pressure. what % were you at when you are above 30 psi? on a side note i got a personal best 11.71 yesterday but its still with a shitty 1.88 60ft. there is defiantely to much boost in the first 2 gears.

 

This is what mine looks like if that helps,
Pressure: 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0
Duty %: 0.0 40.0 45.0 52.0 58.0 62.0 65.0 68.0



Modified by Ludman95 at 7:06 PM 8/4/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">i will be changing the vaccum line setup tonite and see if i get any more boost. Should i try lowering the % the 5 or 10% and see if thats raises boost. it just seems im having to run alot of duty cycle just to double the spring pressure. what % were you at when you are above 30 psi? on a side note i got a personal best 11.71 yesterday but its still with a shitty 1.88 60ft. there is defiantely to much boost in the first 2 gears.</TD></TR></TABLE>
i saw 30psi @60%.
go ahead and raise the duty cycle and see what happens. you just dont have it at a high enough duty cycle. don't be scared of it.if you are worried about the boost going to high, just set the boost cut at where you feel comfortable

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ludman95 &raquo;</TD></TR><TR><TD CLASS="quote">This is what mine looks like if that helps,
Pressure: 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0
Duty %: 0.0 40.0 45.0 52.0 58.0 62.0 65.0 68.0
</TD></TR></TABLE>
if you look at his, you will see that the boost did not really go up until 40%

 

its different for every car, i run the apex'i solenoid and i see 35psi at 85% i think. I think it will keep going to 100%

Im sure that will all change when i switch to an s37x

 

My AEM Solenoid wouldnt make 1 lb over spring pressure (15psi) until about 30% duty, by 50% duty I had 22psi......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SPOOLINmatt &raquo;</TD></TR><TR><TD CLASS="quote">its different for every car, i run the apex'i solenoid and i see 35psi at 85% i think. I think it will keep going to 100%

Im sure that will all change when i switch to an s37x</TD></TR></TABLE>
exactly what I am trying to say. all you have to do is take the time to set it up right and it will work flawlessly

 

the boost raising up to much is not really a worry...i was told by my tuner that as i lower my duty cycle % my boost will raise( gm solenoid) and that i shouldnt go below 15% when using fixed duty cycle. i will post back after i try using both ports on the gate and see if there was an improvement. i think that will solve the problem!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">the boost raising up to much is not really a worry...i was told by my tuner that as i lower my duty cycle % my boost will raise( gm solenoid) and that i shouldnt go below 15% when using fixed duty cycle. i will post back after i try using both ports on the gate and see if there was an improvement. i think that will solve the problem!</TD></TR></TABLE>

Using both ports will solve your problem as putting pressure on the side of the wastegate is only going to hold so much. You need to shut the gate from the top in order to raise the boost. You will also see the power come in faster compared to just running it on the side port....G/L

 

ok. i forgot the gm solenoid was normally open. i assume you have it set as normally open. i had problem with mine. it had a very narrow band of adjustment, maybe only a 30-40% window of adjustment. as cheap as the mac(aem) solenoid is going for now, i would just go ahead and use it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbotypeR@SPEC &raquo;</TD></TR><TR><TD CLASS="quote">ok. i forgot the gm solenoid was normally open. i assume you have it set as normally open. i had problem with mine. it had a very narrow band of adjustment, maybe only a 30-40% window of adjustment. as cheap as the mac(aem) solenoid is going for now, i would just go ahead and use it. </TD></TR></TABLE>

is the mac/aem solenoid always closed then?

 

The Aem solenoid is a normally closed type.

 

problem solved! i got the boost to about 26. car pulled like crazy on the highway. i also worked on the pressure vs. duty and i noticed that it doesnt help until 40%. but i was seeing 26 @ 65% and didnt go any further bc it def. wasnt safe going that fast on the street but i got it all setup. ill tweek it more at the track. thanks for the help