boost overshoot going uphill
#1
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boost overshoot going uphill
I'm getting boost overshoot when under high load, i.e. going up a hill. Is there any way to calm that down? I'm thinking removing the bottleneck in my exhaust might help...thoughts?
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There have been two other threads on this recently. Both determined that the 16G either doesn't like little exhausts and/or low boost pressure.
Your wastegate is probably experiencing too much backpressure from the exhaust to work efficiently.
If the larger exhaust doesn't fully eliminate your issue the wastegate opening is possibly too small to bleed off the exhaust efficiently. It can be ported and a larger flapper installed. Not likely that this will be a problem after you open up your exhaust system.
Someone else said that they had no problem with creep, but they had a lot higher boost setting and probably had other factors in their favor.
Your wastegate is probably experiencing too much backpressure from the exhaust to work efficiently.
If the larger exhaust doesn't fully eliminate your issue the wastegate opening is possibly too small to bleed off the exhaust efficiently. It can be ported and a larger flapper installed. Not likely that this will be a problem after you open up your exhaust system.
Someone else said that they had no problem with creep, but they had a lot higher boost setting and probably had other factors in their favor.
#8
No hills here in FL, sorry.
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#11
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There have been two other threads on this recently. Both determined that the 16G either doesn't like little exhausts and/or low boost pressure.
Your wastegate is probably experiencing too much backpressure from the exhaust to work efficiently.
Someone else said that they had no problem with creep...
Your wastegate is probably experiencing too much backpressure from the exhaust to work efficiently.
Someone else said that they had no problem with creep...
It's not creep per se, just hitting a higher boost and sticking there.
^ I second the question. I'd heard rumblings about MS2 stuff, but nothing for MS1.
Funny that this didn't happen with my old IC...
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In another recent thread it was discussed that the hot side of the intercooler should never be the source for your wastegate signal or boost gauge lines. Disregard the factory outlet nipple. Use a source between the IC and the throttle body. Much more reliable signal. The hotside will give you strange behaviors.
I'll hunt for the posts.
EDIT: Found one. Pay particular attention to Professor Joe Perez's dissertations as the thread progresses. https://www.miataturbo.net/forum/t32479/
I'll hunt for the posts.
EDIT: Found one. Pay particular attention to Professor Joe Perez's dissertations as the thread progresses. https://www.miataturbo.net/forum/t32479/
Last edited by sixshooter; 03-18-2009 at 02:40 PM.
#15
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In another recent thread it was discussed that the hot side of the intercooler should never be the source for your wastegate signal or boost gauge lines. Disregard the factory outlet nipple. Use a source between the IC and the throttle body. Much more reliable signal. The hotside will give you strange behaviors.
I'll hunt for the posts.
EDIT: Found one. Pay particular attention to Professor Joe Perez's dissertations as the thread progresses. https://www.miataturbo.net/forum/t32479/
I'll hunt for the posts.
EDIT: Found one. Pay particular attention to Professor Joe Perez's dissertations as the thread progresses. https://www.miataturbo.net/forum/t32479/
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