after 18 months, ITS FIXED!!!
after 18 months, ITS FIXED!!!
100% boost at redline for my APS ST!
ive finally got the kit to hold 100% boost all the way to redline. i divorced the downpipe and changed the forge actuator to a dual ported actuator. i was in the process of making an external wastegate setup, got about half way thru, but figured id try the divorced setup first and it works perfect. i even installed an electronic cutout in the exhaust and i dont need it at all. it makes about 6psi in first, 7-8 in 2nd, and 9-10 in the rest, did i mention it holds it all to redline.
even with my blitz ebc off and running spring pressure, which is around 9 on the wastegate, it holds it. it feels great. the only negative side, is that if im going slow in a high gear, say 30, @ 2000 rpms, and in 4th, if i punch it, the boost keeps building, like 13, 14, 15, 16, haha, that happened a few times. i think its because the other port on the actuator is fighting the swingvalve, but i dont know why it doesnt do it from a dig. i really dont care. ill just have to keep my eye on it, my warning is set @12psi on the ebc.
ill post some pics and datalogs up later.
plus i even dropped a lot on a full utec setup and dont know if im gonna install it now.
ive finally got the kit to hold 100% boost all the way to redline. i divorced the downpipe and changed the forge actuator to a dual ported actuator. i was in the process of making an external wastegate setup, got about half way thru, but figured id try the divorced setup first and it works perfect. i even installed an electronic cutout in the exhaust and i dont need it at all. it makes about 6psi in first, 7-8 in 2nd, and 9-10 in the rest, did i mention it holds it all to redline.
even with my blitz ebc off and running spring pressure, which is around 9 on the wastegate, it holds it. it feels great. the only negative side, is that if im going slow in a high gear, say 30, @ 2000 rpms, and in 4th, if i punch it, the boost keeps building, like 13, 14, 15, 16, haha, that happened a few times. i think its because the other port on the actuator is fighting the swingvalve, but i dont know why it doesnt do it from a dig. i really dont care. ill just have to keep my eye on it, my warning is set @12psi on the ebc.
ill post some pics and datalogs up later.
plus i even dropped a lot on a full utec setup and dont know if im gonna install it now.
Holy moly, great to hear Brett... Well other than when you drive normal and build boost 
Did you take any pics?
And hell you bought all the stuff for UTEC, might as well use it I say... Cause it may be hard to get what you paid for it if you try to sell.
Did you take any pics?
And hell you bought all the stuff for UTEC, might as well use it I say... Cause it may be hard to get what you paid for it if you try to sell.
Last edited by Peking; Nov 12, 2006 at 10:45 AM.
Originally Posted by Peking
Holy moly, great to hear Brett... Well other than when you drive normal and build boost
Did you take any pics?
And hell you bought all the stuff for UTEC, might as well use it I say... Cause it may be hard to get what you paid for it if you try to sell.
Did you take any pics?
And hell you bought all the stuff for UTEC, might as well use it I say... Cause it may be hard to get what you paid for it if you try to sell.
im gonna take some pics soon, i cant decide about the UTEC, its a totally different car now, if i install the UTEC, id get sharif to tune it, but is 20-30hp worth the headache of installing it then tuning it, when the unichip is safe and running perfect already, and who knows, the UTEC would put me over 400whp and i dont know if i want to be running that. that seems to be the breaking point in a lot of these cars. id probably hold onto the UTEC for a while and see what happens, you know i get bored REAL easy, and with the boost problem fixed, im gonna need something to fill my time.
now ive got a brand new tial 38mm wg i dont need.
Originally Posted by tig488
haha, it only overboosts when im in the real low rpms, in a high gear, which is never really, i got on the freeway and did some runs from a roll, and it did fine. so unless i punch it at 1500 rpms, in 5th, it will be ok.
im gonna take some pics soon, i cant decide about the UTEC, its a totally different car now, if i install the UTEC, id get sharif to tune it, but is 20-30hp worth the headache of installing it then tuning it, when the unichip is safe and running perfect already, and who knows, the UTEC would put me over 400whp and i dont know if i want to be running that. that seems to be the breaking point in a lot of these cars. id probably hold onto the UTEC for a while and see what happens, you know i get bored REAL easy, and with the boost problem fixed, im gonna need something to fill my time.
now ive got a brand new tial 38mm wg i dont need.
im gonna take some pics soon, i cant decide about the UTEC, its a totally different car now, if i install the UTEC, id get sharif to tune it, but is 20-30hp worth the headache of installing it then tuning it, when the unichip is safe and running perfect already, and who knows, the UTEC would put me over 400whp and i dont know if i want to be running that. that seems to be the breaking point in a lot of these cars. id probably hold onto the UTEC for a while and see what happens, you know i get bored REAL easy, and with the boost problem fixed, im gonna need something to fill my time.
now ive got a brand new tial 38mm wg i dont need.
Oh and you have that Tial WG too. Man it is great to fixed the problem, but sucks you bought extra stuff you didn't need... I kinda know what that is like too
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zeitronix datalogs confirm. 100% holding at redline. i have the 9-15 psi spring in my forge actuator, and the spring is set at 9, barely any tension on the rod, it "may" have 1/8 inch of preload, so it should be right at 9.
with the ebc off and running only spring pressure, it makes 8.3 and holds it all the way to 6800 rpms. with my exhaust cutout open, it makes 10psi and holds 9 to redline. takes <300 rpms to achieve full boost between shifts, and boost starts at 2800, full boost is at 3700. thats with he ebc off, and no gain.
weird thing is, even if i turn the ebc on, and set the gain really high, to make more boost, it wont, it only makes ~8.5 and thats all. i guess it has something to do with the second port on the actuator, but i dont know. im gonna mess with it this week and get it straightened out.
but, by far, it feels totally different pulling at redline instead of falling on its face.
on a side note, while doing all this, the fuse to the oil sump pump blew, causing the car to smoke like crazy, so i had to take the exhaust off and clean it all out, after i got it running right and after i datalogged it, i got home and noticed oil all over the underside of the hood. all that oil was blown into the intercooler, up into the intake pipe, all over the maf, into the tb, and it was being blown out of the bov. so i had to take all that crap off and clean it out as well. thanks aps for another well thought out idea.
with the ebc off and running only spring pressure, it makes 8.3 and holds it all the way to 6800 rpms. with my exhaust cutout open, it makes 10psi and holds 9 to redline. takes <300 rpms to achieve full boost between shifts, and boost starts at 2800, full boost is at 3700. thats with he ebc off, and no gain.
weird thing is, even if i turn the ebc on, and set the gain really high, to make more boost, it wont, it only makes ~8.5 and thats all. i guess it has something to do with the second port on the actuator, but i dont know. im gonna mess with it this week and get it straightened out.
but, by far, it feels totally different pulling at redline instead of falling on its face.
on a side note, while doing all this, the fuse to the oil sump pump blew, causing the car to smoke like crazy, so i had to take the exhaust off and clean it all out, after i got it running right and after i datalogged it, i got home and noticed oil all over the underside of the hood. all that oil was blown into the intercooler, up into the intake pipe, all over the maf, into the tb, and it was being blown out of the bov. so i had to take all that crap off and clean it out as well. thanks aps for another well thought out idea.
Originally Posted by Weqster
i rather underboost then overboost. seems like u need to let off a little gate pressure.
Last edited by tig488; Nov 13, 2006 at 06:04 AM.
Originally Posted by tig488
like i mentioned, it only overboosts if i go wot from a really low rpm in a high hear, which is never. it doesnt happen if i downshift a gear.
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From: Sydney, Australia
Originally Posted by tig488
like i mentioned, it only overboosts if i go wot from a really low rpm in a high gear, which is never. it doesnt happen if i downshift a gear.
Originally Posted by MIAPLAYA
Could it be wastegate duty cycle settings? If the duty cycle is too high it cold cause a similar issue...
Weqster, i made sure of that, the nut was rubbing the turbine housing, so i filed it back.
Originally Posted by tig488
MIA, the duty cycle is 0, i had the ebc turned off.
Weqster, i made sure of that, the nut was rubbing the turbine housing, so i filed it back.
Weqster, i made sure of that, the nut was rubbing the turbine housing, so i filed it back.
haha, i dont know if it goes down because once it hits 14psi i let off. im too scared to see if it drops, lol.
whats happening is since i have both ports hooked up, the pressures on both sides of the actuator are pushing against each other, so basically, they negate each other and i just run off spring pressure, which is fine, because im making 8.5psi and holding it all to redline. when i turn the ebc on, no matter how high i set the duty cycle, even at 100%, the boost still only goes to 8.5. UNTIL i do a low rpm, high gear run, then it spikes.
tonight im switching the lines going to the wg and see what happens. i might tap the comp housing and run a boost line from it, since thats the best method.
whats happening is since i have both ports hooked up, the pressures on both sides of the actuator are pushing against each other, so basically, they negate each other and i just run off spring pressure, which is fine, because im making 8.5psi and holding it all to redline. when i turn the ebc on, no matter how high i set the duty cycle, even at 100%, the boost still only goes to 8.5. UNTIL i do a low rpm, high gear run, then it spikes.
tonight im switching the lines going to the wg and see what happens. i might tap the comp housing and run a boost line from it, since thats the best method.