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12-24-2007, 03:35 AM | #1 |
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is this normal ??? how accurate is maddad boost gauge
i was in 5th gear today going about 70mph with the pedal all the way down and noticed that my boost gauge would go to about 20-21 psi and then the red light on the boost gauge would come on and then it would go back down after the light turned on. btw mods are perrin turboback with single catted downpipe and Cobb AP v2 stage 2 ACN91 oct map. is this normal ?
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12-24-2007, 04:28 AM | #2 |
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in a way normal. but its not safe. you are experiencing boost creep.
if you just have a off the shelf stage2 map from cobb you shouldnt be boosting that high. search "boost creep" on here. |
12-24-2007, 05:13 AM | #3 |
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is it possible that the gauge is hooked up wrong ?
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12-24-2007, 01:06 PM | #4 |
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"boost creep" is a mechanical issue and CANNOT be tuned out
you may however be over boosting and might want to try a lower WGDC map |
12-24-2007, 01:09 PM | #5 |
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It is probably not the gauge. I have a similar setup, with the same gauge. I overboosted the other day also. It is because the turbo is being forced to flow more air than the wastegate can deal with. Your boost is too low!! This does NOT mean you should get a boost controller and turn it up lol.
You need a Pro tune. Tuned (on Cali/AZ 91), you will be around 18-19 PSI, and with a catted DP there is a good chance you won't creep. Boost creep CAN be tuned out. Take a Cobb map that runs around 15 psi. It is not enough PSI to take the stress off the internal wastegate. Now turn the boost up closer to where it wants to be, and the wastegate will have a lot less work. Now if you creep when tuned already, it can probably not be tuned out. THEN it would be a purely mechanical issue. But I am willing to bet your setup will be fine once you are protuned. |
12-24-2007, 11:14 PM | #6 |
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That is definitely when boost creep happens. That seems crazy to me to have creep with a catted dp in Arizona though. What's the weather like now?
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12-25-2007, 01:55 AM | #7 |
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about 45 deg at night
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12-25-2007, 02:03 AM | #8 |
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12-25-2007, 05:10 AM | #9 | |
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http://www.boostplanet.com/black_hole(tm).htm I can find plenty more to back this up !! get a clue Dip S*** and http://forums.nasioc.com/forums/showthread.php?t=477715 you've been corrected on this before...pay attention or shut up http://forums.nasioc.com/forums/show....php?t=1387834 Last edited by a6n6d6y; 12-25-2007 at 08:01 AM. Reason: more info |
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12-25-2007, 12:48 PM | #10 |
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I've tuned out all my boost creep so whatever.
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12-25-2007, 03:35 PM | #11 | |
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oh yea and merry xmas |
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12-25-2007, 05:12 PM | #12 |
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I had a catless setup with an Fp Green. I also use a TurboXS DTEC boost controller. It's cold here and I could not control my boost creep. The electronic controller will not tune it out. I have tried many times. I tried installing a cat and now my setup works properly. During the summer month's I had no issues. I've been told that a little porting will also help.
Rexfan |
12-25-2007, 05:12 PM | #13 |
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subscribed.....for the fun of it.
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12-25-2007, 05:48 PM | #14 | |
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porting your waste gate may or an external waste gate will resolve your issues dont feel to bad I have a 20g and creep to 19 lbs on a 8 lbs gate however i'm tuned for 22 so no biggie to OP sorry about all this hoopla on your thread hope this helps figure out your issue(s) Last edited by a6n6d6y; 12-25-2007 at 05:57 PM. |
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12-25-2007, 09:42 PM | #15 |
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run a higher octane tune, that will take care of your boost creep
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12-25-2007, 10:01 PM | #16 | |
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My tuner fixed it, whoever said it cant be tuned out is an idiot and shouldnt be posting about stuff they dont know. I now have a catted invidia DP and cant wait to get tuned for it |
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12-26-2007, 11:45 AM | #17 |
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Ok, that is pretty cold, and definitely cold enough to be creep territory. If you plan on continuing to run the stock turbo, you should probably port your wg. It is a little work to do all that though, especially after you've already done your dp, so if you plan on a turbo upgrade in the near future, I'd just try to avoid running it out in 5th or 6th when it's cold out. You could also try the low WGDC map. Who knows, you may get lucky.
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12-26-2007, 12:17 PM | #18 |
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Some of the earlier V2 Maddad gauges are off. Rich sent me a replacement sending unit and gauge. My old gauge would read 19 to 20 psi on my stage 1 setup when the access port was only seeing 16.4.
I would contact Rich and find out if you have an older model gauge. Use your accessport to verify if the gauge is off or you are experiencing boost creep. |
12-26-2007, 12:47 PM | #19 | |
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12-26-2007, 12:56 PM | #20 |
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It sounds like boost spike, not creep. 4/5 people don't even get/have boost creep. It is most likely spiking due to incorrect WGDCs. I love how everyone automatically assumes it's boost creep. Here is a hint, boost creep keeps rising until you hit FC. From what the post reads, his goes past and then settles back down. ie: boost spike, not creep. True boost creep CANNOT be tuned out. However, boost spikes from OTS maps CAN be tuned out. The OP is also using a CATTED DP, this makes me really think it is NOT creep, but rather a spike. GM BCS and a tune time.
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12-26-2007, 01:33 PM | #21 |
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i had the same problem, i just purchased a map up grade from PDX, and all problems were fixed
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12-26-2007, 02:50 PM | #22 | |
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Quote:
+1 People are so quick to assume boost creep. Thanks for wording it so the others in the thread might be able to understand and save face before posting further... |
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12-26-2007, 09:28 PM | #23 |
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I just finished helping my friend install a set of V2's. I took it out for a test run and the gauge was showing 20psi rising to 23psi. It seems to be the same problem as his previous gauge and AP was showing 17-17.5 psi.
The boost could be creeping or it could be a spike, nonetheless the gauge is running high by 3psi. I doubt it's creep as it was not throwing an overboost code. |
12-26-2007, 09:28 PM | #24 |
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Nice looking gauge.
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12-26-2007, 09:33 PM | #25 |
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