Boost spike with open wastegate and AVCR
11-20-07, 06:09 PM
#1
Boost spike with open wastegate and AVCR
The "A" setting on my AVCR is set to 14psi and when I got WOT in second for example up until 8500, i look at my peak hold and its 1.28 bar which is 18psi.
I have a HKS standard wastegate vented to atmosphere with a small pipe, so there really is no restriction in exhaust flow, but shouldnt the AVCR keep it at 14psi?
comments?/ideas?/opinions?
I have a HKS standard wastegate vented to atmosphere with a small pipe, so there really is no restriction in exhaust flow, but shouldnt the AVCR keep it at 14psi?
comments?/ideas?/opinions?
11-20-07, 09:49 PM
#4
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Then it is probably the gain. You set a % for that and the target boost. Leave the target boost where you want it, and reduce the gain% until it stops overshooting.
-Andy
-Andy
11-21-07, 12:52 PM
#6
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Right it could be that your WG is too small as well, the easy test is to turn the boost controller off and see what boost you get. What is the spring in the WG?
-Andy
-Andy
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11-24-07, 06:17 PM
#10
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If you take the pressure source for the boost solenoid directly on the turbo outlet, it will spike more and will require a low gain value.
I had this problem with my Blitz DSBC R model. When I moved the source to the Greddy elbow, the problem went away and boost was manageable.
I had this problem with my Blitz DSBC R model. When I moved the source to the Greddy elbow, the problem went away and boost was manageable.
11-26-07, 12:40 PM
#17
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If you take the pressure source for the boost solenoid directly on the turbo outlet, it will spike more and will require a low gain value.
I had this problem with my Blitz DSBC R model. When I moved the source to the Greddy elbow, the problem went away and boost was manageable.
I had this problem with my Blitz DSBC R model. When I moved the source to the Greddy elbow, the problem went away and boost was manageable.
-Andy
... could this be a symptom of boost spike?
11-27-07, 01:22 PM
#20
It dosnt seem like it is.... but theres smoke coming from the exhaust side of the turbo and i can deffinatly smell it.
My rotary mechanic says the exhaust oil seal is leaking just like on his T04R.. so i dono... it happened 2 weeks ago... didnt happen at all, all of last week (even when really pushing it)... and now this week its smoking again. I dono what to think, or do.
If someone would buy my kit, I want to go 500R, or else ill have to get a rebuild or GT35R
My rotary mechanic says the exhaust oil seal is leaking just like on his T04R.. so i dono... it happened 2 weeks ago... didnt happen at all, all of last week (even when really pushing it)... and now this week its smoking again. I dono what to think, or do.
If someone would buy my kit, I want to go 500R, or else ill have to get a rebuild or GT35R
12-13-07, 02:17 PM
#24
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so my car just started boost spiking. I have a RX6b, so no wastegate there. I also have the AVC-R and haven't touched it. And at the same time my EGT are reaching 800c. I thought it was a vac line at first but everything is still the same. Any suggestions on where I should look for this. Oh and the boost spiking occurs even with the AVC-R on the off posistion.
12-13-07, 02:30 PM
#25
I wouldn't put it on the underside of any intake piping. If you get oil residue in any of your pipes from a leaking turbo thrust bearing or something else then it could settle in the vacuum hose and make the MAP sensor read incorrectly. Probably wouldn't happen, but definitely possible.