Drop on boost

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Aug 20, 2013 | 11:52 AM

C6BOOSTED

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Racer

Joined: Feb 2012

Posts: 356

Likes: 15

From: Phoenix az

Drop on boost

I have an 06 A6 with an A&A v3 with 3.4 pulley and I notice at wot it quickly hits #10 and they drops to 5-6 pounds when tranny shifts. takes a while to build boost back sometimes doesnt even hit #10 again. Is this normal ? this a slipping belt? Boost leak? Bad BOV? Btw the belt is pretty new 1k or less but its a Dayco brand and I checked the adjustable belt tensioner and its on tight. Any help would be great

Aug 20, 2013 | 01:07 PM

jon6.0

Melting Slicks

Joined: Apr 2007

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From: Phoenix

Centris build boost with rpm, so your boost will drop with RPM. You sure something is going on?

Aug 20, 2013 | 02:50 PM

Unreal

Team Owner

Joined: Nov 2007

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From: Gilbert AZ

Sounds normal. You hit peak boost before redline or right before it shifts, then it drops back down.

Aug 20, 2013 | 03:37 PM

Drewstein

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Joined: Feb 2006

Posts: 3,191

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From: Scottsdale Az

Sounds normal to me as well. Maybe data log your MAP reading just in case. It should have a similar pattern in each gear.

Aug 20, 2013 | 06:50 PM

0East Tx Muscle Cars

Former Vendor

Joined: Oct 2007

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From: longview tx

You will build 9-10 psi at peak, if you notice though at like 6000 RPM your going to be 1-2 PSI less than peak. Like stated a CENTRI blower is RPM based. you probably dont have a issue.

what RPM does your motor drop down to when it shifts?

Aug 20, 2013 | 08:57 PM

C6BOOSTED

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Racer

Joined: Feb 2012

Posts: 356

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From: Phoenix az

Ill check what rpm it drops to . I wasnt sure if it was normal. Plus im trying to fix any lil bugs out before I take it to get it tune next month

Aug 20, 2013 | 09:43 PM

jon6.0

Melting Slicks

Joined: Apr 2007

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From: Phoenix

Wait, wut? Are you getting on it untuned?

Aug 20, 2013 | 09:57 PM

C6BOOSTED

Thread Starter

Racer

Joined: Feb 2012

Posts: 356

Likes: 15

From: Phoenix az

Lol it was tune for the supercharger a while ago. Then retune for meth. Then I did a cam and haven't retune. But I found out there was a leak in my alky system, got that fix now and notice about the boost drop while keeping an eye on my alky. I just want everything working probably for the tuner when ready