Boost Spikes
01-27-2004, 06:53 PM
#1
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Join Date: Sep 2003
Location: DC/MD
Posts: 84
Hey guys, this winter I got some new 99 spec turbos. Since the install the weather has really gotten cold and I've been afraid of the cold air and boost spikes. We all know what happens when you lean out too much. What's the best way to get ROCK solid boost that won't spike under ANY weather conditions. I've noticed that my car has been creeping past my set boost settings and I don't want to keep it under throttle to make it relearn where it should be.
Is anyone experienced with the PFS ecu? Ray told me I should turn up my vent values and I guess I'm a little afraid to mess with it.
Any advice appreciated!
Is anyone experienced with the PFS ecu? Ray told me I should turn up my vent values and I guess I'm a little afraid to mess with it.
Any advice appreciated!
01-27-2004, 06:59 PM
#2
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Location: fredneck MD
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01-27-2004, 10:01 PM
#4
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From what i just learned about my friend with an sti. He gots short ram air intake on his and some other puny mods and also gets boost spikes... is to port out some part of the turbo. Not to sure about the details im pretty sure some one heard of this method.
_adam
_adam
01-27-2004, 10:13 PM
#5
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Location: fredneck MD
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Originally Posted by adamrotor' date='Jan 28 2004, 12:01 AM
From what i just learned about my friend with an sti. He gots short ram air intake on his and some other puny mods and also gets boost spikes... is to port out some part of the turbo. Not to sure about the details im pretty sure some one heard of this method.
_adam
_adam
Back to his question. Some Standalones control boost, some dont.
01-27-2004, 10:41 PM
#6
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What i ment was that a friend of mine who owns his own perfomance place he is fixing my other friends sti boost spike problem. What he is doing is porting one end of the turbo to eliminate the spike but im not sure f the exact process. Ill find out tomorow... I thought someone would know of this method.
_marcin
_marcin
01-27-2004, 11:45 PM
#7
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Okay, I'm not sure why porting a turbo would have an effect on boost spikes... I think I was thinking more along the terms of either a boost controller or some sort of adjustment to my PFS ECU to prevent spikes...
01-28-2004, 04:56 PM
#8
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Join Date: Jun 2002
Location: La Plata, Maryland
Posts: 9,725
What adamrotor is trying to get at is porting the wastgate, but that is for getting rid of boost creep not spikes.
Basically you pull apart the turbo and cut away about 1/16" of material from around the hole.
Leaving only enough for the flapper to cover over the wastgate hole.
Thus allowing your wastegate to vent more boost off.
Anyway...
The PFS unit does not control boost spikes.
The only way your gonna get rid of transitional spikes is to either get a good boost controller or go non sequential.
I would suggest that you get a boost controller anyway.
My fav is turbosmart gated manual controller.
They are cheap and they work like a champ not to mention its very small which is good in this case
Copy and paste... www.turbosmart.com.au
Basically you pull apart the turbo and cut away about 1/16" of material from around the hole.
Leaving only enough for the flapper to cover over the wastgate hole.
Thus allowing your wastegate to vent more boost off.
Anyway...
The PFS unit does not control boost spikes.
The only way your gonna get rid of transitional spikes is to either get a good boost controller or go non sequential.
I would suggest that you get a boost controller anyway.
My fav is turbosmart gated manual controller.
They are cheap and they work like a champ not to mention its very small which is good in this case
Copy and paste... www.turbosmart.com.au
01-28-2004, 06:07 PM
#9
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Thread Starter
Join Date: Sep 2003
Location: DC/MD
Posts: 84
Ha ha....
If I had to go the route of a boost controller I was considering going with an AVC-R because I can control boost in specific gears which I think would be very useful in the FD. I'll check out turbosmart and check back with ya.
THANKS!
If I had to go the route of a boost controller I was considering going with an AVC-R because I can control boost in specific gears which I think would be very useful in the FD. I'll check out turbosmart and check back with ya.
THANKS!