please help with boost control nightmare
06-06-05, 09:51 PM
#1
Senior Member
Thread Starter
please help with boost control nightmare
i want to run and hold 10psi, the problem is that if i set my controller so i have 10 it falls off to about 6 as i near redline, i thought mabey the turbo was just being overflowed, (like the stocker) but if i unhook the wastegate hose, and feather the throttle to control the boost i can get easily 15psi at 8000rpm
the turbo is a s5 hybrid, t5/6 compressor, and mega wastegate porting with almost too much backcutting. the trubo was assembled/rebuilt by me
i thought that mabey my problem was that i only had a bleed type controller, so i bought a ball spring/bleed type......still does the same thing
what is causing this??????? someone please help me
zac
the turbo is a s5 hybrid, t5/6 compressor, and mega wastegate porting with almost too much backcutting. the trubo was assembled/rebuilt by me
i thought that mabey my problem was that i only had a bleed type controller, so i bought a ball spring/bleed type......still does the same thing
what is causing this??????? someone please help me
zac
06-07-05, 12:16 AM
#2
Passing life by
Originally Posted by zbrown
i want to run and hold 10psi, the problem is that if i set my controller so i have 10 it falls off to about 6 as i near redline, i thought mabey the turbo was just being overflowed, (like the stocker) but if i unhook the wastegate hose, and feather the throttle to control the boost i can get easily 15psi at 8000rpm
the turbo is a s5 hybrid, t5/6 compressor, and mega wastegate porting with almost too much backcutting. the trubo was assembled/rebuilt by me
i thought that mabey my problem was that i only had a bleed type controller, so i bought a ball spring/bleed type......still does the same thing
what is causing this??????? someone please help me
zac
the turbo is a s5 hybrid, t5/6 compressor, and mega wastegate porting with almost too much backcutting. the trubo was assembled/rebuilt by me
i thought that mabey my problem was that i only had a bleed type controller, so i bought a ball spring/bleed type......still does the same thing
what is causing this??????? someone please help me
zac
If you are droping boost it is leaking. Does it drop when you hold the RPM? Or will it drop under heavy accel/load? Look at VAC leaks waste gate leaks IC leaks. Alot of times if you push a turbo to its max it will leak down just b/c its not capable of sustaning such high boost.
06-07-05, 01:37 AM
#4
Passing life by
Originally Posted by slpin
^^^ LIES LIES LIES
just run a boost controller that learns your boost charistics... like EVC, AVC-R, etc.
also... 3 PSI is too much boost for the stock IC to handle....
just run a boost controller that learns your boost charistics... like EVC, AVC-R, etc.
also... 3 PSI is too much boost for the stock IC to handle....
06-07-05, 06:05 AM
#5
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Originally Posted by slpin
^^^ LIES LIES LIES
just run a boost controller that learns your boost charistics... like EVC, AVC-R, etc.
also... 3 PSI is too much boost for the stock IC to handle....
just run a boost controller that learns your boost charistics... like EVC, AVC-R, etc.
also... 3 PSI is too much boost for the stock IC to handle....
an ebc won't help that problem that much. it will still drop down.
06-07-05, 07:28 AM
#6
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Originally Posted by zbrown
i thought that mabey my problem was that i only had a bleed type controller, so i bought a ball spring/bleed type......still does the same thing
what is causing this???????
what is causing this???????
MBC (mechanical boost controllers) only raise your boost levels relative to how the stock boost levels were.
You want SOLID boost, stop wasting your money on the cheap stuff and get a closed-loop EBC.
-Ted
06-07-05, 07:32 AM
#7
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Originally Posted by RX7_2ner
an ebc won't help that problem that much. it will still drop down.
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
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06-07-05, 09:27 AM
#8
Senior Member
Thread Starter
[QUOTE=RETed]You just answered your own question.
MBC (mechanical boost controllers) only raise your boost levels relative to how the stock boost levels were.
that makes alot of sense^^....ill just spend the money for an ebc
thanks
MBC (mechanical boost controllers) only raise your boost levels relative to how the stock boost levels were.
that makes alot of sense^^....ill just spend the money for an ebc
thanks
06-07-05, 12:33 PM
#9
Haven't we ALL heard this
Wow, you actually removed the vacuum line that went to the wastegate acctuator....you have some big big ***** 
What kinda of manual boost controller are you using?
What kinda of manual boost controller are you using?
06-07-05, 02:09 PM
#10
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Originally Posted by RETed
You know what...
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
Woah, sorry tough guy.
06-07-05, 05:52 PM
#11
Originally Posted by RETed
You know what...
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
THANK YOU Ted.
06-07-05, 05:53 PM
#12
Senior Member
Thread Starter
Originally Posted by Wankel7
Wow, you actually removed the vacuum line that went to the wastegate acctuator....you have some big big *****
What kinda of manual boost controller are you using?
What kinda of manual boost controller are you using?
lol, it was pissing me off so i had to find out, i have a wideband and afc, so i turned the fuel way up and i know my afr's werent a problem
i first had the standard turboxs controller, then i bought this one http://cgi.ebay.com/ebaymotors/ws/eB...978154785&rd=1
that one worked better than the turboxs controller
so an ebc will make that much difference huh?
zac
06-07-05, 05:56 PM
#13
the problem you are having is
the wastegate is opened too much for the high boost
you want a boost controller like the ones Ted and I mentioned
that way it can control your wastegate correctly, thus, you have a solid boost plane (not curve.
dont listen to iceblue... his intelligence is as high as his spelling... which, if i may add... is not high at all...
the wastegate is opened too much for the high boost
you want a boost controller like the ones Ted and I mentioned
that way it can control your wastegate correctly, thus, you have a solid boost plane (not curve.
dont listen to iceblue... his intelligence is as high as his spelling... which, if i may add... is not high at all...
06-07-05, 06:03 PM
#14
Passing life by
Originally Posted by slpin
the problem you are having is
the wastegate is opened too much for the high boost
you want a boost controller like the ones Ted and I mentioned
that way it can control your wastegate correctly, thus, you have a solid boost plane (not curve.
dont listen to iceblue... his intelligence is as high as his spelling... which, if i may add... is not high at all...
the wastegate is opened too much for the high boost
you want a boost controller like the ones Ted and I mentioned
that way it can control your wastegate correctly, thus, you have a solid boost plane (not curve.
dont listen to iceblue... his intelligence is as high as his spelling... which, if i may add... is not high at all...
by me.. If you are droping boost it is leaking
I recal telling him what to check that can cause that. And you and ReTed told him a controller to manage the waste gate leak in this case. Wow maybe you can see now that it is spelld out for you.
06-07-05, 07:42 PM
#16
Hmmm..
This thread is AWESOME!
I personally ran over 15 PSI on a stock intercooler and stock turbo, which gave me a 13.4 1/4 mile on a stock motor with an SAFC. Was it smart? Probably not, but it can be done, and my motor survived quite nicely. Also, my timing was stock.
This thread is AWESOME!
I personally ran over 15 PSI on a stock intercooler and stock turbo, which gave me a 13.4 1/4 mile on a stock motor with an SAFC. Was it smart? Probably not, but it can be done, and my motor survived quite nicely. Also, my timing was stock.
06-07-05, 09:07 PM
#17
Senior Member
Thread Starter
Originally Posted by Wankel7
How long are the vacuum lines....running from your turbo to the MBC?
i have been messing around by adding different springs to the wastegate to increase the preload and that has helped some
06-07-05, 09:14 PM
#18
Originally Posted by RETed
You know what...
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
Stop spreading misinformation like this is you have no idea what you are talking about.
The A'PEXi AVC-R will give you whatever preset boost level you choose, as long as you're allowing it to work under it's normal parameters (i.e. no major boost spiking, stable boost levels, etc.).
The older HKS EVC III ATM was able to do this too.
I heard the Blitz SBC can do this too - can anyone confirm?
The GReddy PRofec CANNOT - it is not a closed-loop EBC.
-Ted
06-07-05, 10:00 PM
#19
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Originally Posted by iceblue
I recal telling him what to check that can cause that. And you and ReTed told him a controller to manage the waste gate leak in this case. Wow maybe you can see now that it is spelld out for you.
Isn't it common sense to make sure everything is working correctly before modifying stuff???
I mean you wouldn't go stuffing a boost controller on an engine with a hurt apex seal, right???
-Ted
06-07-05, 10:20 PM
#21
Passing life by
Originally Posted by RETed
Why are you assuming something is wrong with his car in the first place?
Isn't it common sense to make sure everything is working correctly before modifying stuff???
I mean you wouldn't go stuffing a boost controller on an engine with a hurt apex seal, right???
-Ted
Isn't it common sense to make sure everything is working correctly before modifying stuff???
I mean you wouldn't go stuffing a boost controller on an engine with a hurt apex seal, right???
-Ted
But perhaps he was saying he didn’t know what would cause it and was asking for suggestions.
I said his waste gate is leaking, his IC pipe is leaking, or his turbo is being over boosted and unable to hold that amount of boost.
slpin posted to get a electric boost controller like AVC-R
You then posted that his waste gate was insufficient and incapable of holding the boost as he wants and needs a closed EBC controller such as AVC-R to maintain it.
06-07-05, 10:49 PM
#22
"I said his waste gate is leaking, his IC pipe is leaking, or his turbo is being over boosted and unable to hold that amount of boost."
he said it boosted 15psi with the wastegate capped off.
a leaking wastegate would make his boost go higher
a leaking IC pipe would not allow him to boost and hold the previous 15psi that he had achieved.
you are wrong.
you need to shut up and give up... go get your dad to work on your car or something...
i dont like you, and pretty soon, i dont think that the lovely beautiful sexy ted will like you either!
he said it boosted 15psi with the wastegate capped off.
a leaking wastegate would make his boost go higher
a leaking IC pipe would not allow him to boost and hold the previous 15psi that he had achieved.
you are wrong.
you need to shut up and give up... go get your dad to work on your car or something...
i dont like you, and pretty soon, i dont think that the lovely beautiful sexy ted will like you either!
06-07-05, 11:55 PM
#23
Passing life by
Originally Posted by slpin
"I said his waste gate is leaking, his IC pipe is leaking, or his turbo is being over boosted and unable to hold that amount of boost."
he said it boosted 15psi with the wastegate capped off.
a leaking wastegate would make his boost go higher
a leaking IC pipe would not allow him to boost and hold the previous 15psi that he had achieved.
you are wrong.
you need to shut up and give up... go get your dad to work on your car or something...
i dont like you, and pretty soon, i dont think that the lovely beautiful sexy ted will like you either!
he said it boosted 15psi with the wastegate capped off.
a leaking wastegate would make his boost go higher
a leaking IC pipe would not allow him to boost and hold the previous 15psi that he had achieved.
you are wrong.
you need to shut up and give up... go get your dad to work on your car or something...
i dont like you, and pretty soon, i dont think that the lovely beautiful sexy ted will like you either!
Allright on my friends GST runing 20PSI on stock T and a MBC. He could peak 20psi but it would creep to 17. B/C of insufichant turbo. Put a T3/T4 hybrid on it and ran 18psi stable. Same car when it was boosting 15psi used to hit 15 and leak down to 10. His IC pipe had a leak. Fixed and held 15psi.
a leaking wastegate would make his boost go higher.......
Yea that is right b/c it will allow more exhaust flow. Then how does a EBC work? It close the flapper on the waste gate?
06-08-05, 01:27 AM
#24
I am 2Furious
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hmm...i had always thought Ted was a guy and that picture was of his girlfriend/wife or something. I dunno.
So is stock boost supposed to drop off at higher RPMs? Since you said a MBC just reflects the normal boost curve. Is it adding a percentage or increasing by just a flat amount?
So is stock boost supposed to drop off at higher RPMs? Since you said a MBC just reflects the normal boost curve. Is it adding a percentage or increasing by just a flat amount?
06-08-05, 03:20 AM
#25
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Originally Posted by iceblue
Allright on my friends GST runing 20PSI on stock T and a MBC. He could peak 20psi but it would creep to 17. B/C of insufichant turbo. Put a T3/T4 hybrid on it and ran 18psi stable. Same car when it was boosting 15psi used to hit 15 and leak down to 10. His IC pipe had a leak. Fixed and held 15psi.
Then how does a EBC work? It close the flapper on the waste gate?
You T off the wastegate line, and it bleeds a certain amount of pressure, depending on how you set it.
Fancy ones are able to input RPM, and you get to program the boost "curve" dependent on RPM.
Even fancier version (i.e. A'PEXi AVC-R) have "self learn" that allows the EBC to run the most aggressive boost ramp your engine can handle.
Control is through a PWM solenoid...
-Ted