BP turbo build/advice

Boosted Performance · 04-15-2017, 08:08 AM

Quote:

Originally Posted by hc_416

So I picked up the bat mobile and drove her 600 miles. Two things came up, first the AFR gauge wasn't working too well. AAM fixed that with putting in a new sensor, it looks like it was bent. The second thing was my boost gauge is saying I’m over boosting to like 20 and 30 pounds of boost.... the tuner Mike said it was closing when I let off the gas and causing a boost spike. The pressure came from the throttle shutting and really wasn’t there? I saw it happen on my gauge and it doesn’t seem like I’m hitting 30 PSI, but I have no way to tell. The only boos gauge I had was the Greddy Profec and it worked fine when I gave them the car. Another thing I noticed was the car never shows any vacuum? I am thinking it could be one of these things; boost gauge is broke; boost gauge hooked up/set-up wrong; it really is hitting that psi? Advice would be appreciated! Thanks guys!!

With a new/built engine, you need find out what your vacuum is at idle, while the engine is hot. Based on this, you may need to change the BOV spring:

http://www.streettunedmotorsports.co...ring_chart.jpg

The BOV in the kit comes with an 11psi spring, since the vacuum falls in that range with the stock engine. A shop like AAM should know this.

hc_416 · 04-15-2017, 02:19 PM

Quote:

Originally Posted by Boosted Performance

With a new/built engine, you need find out what your vacuum is at idle, while the engine is hot. Based on this, you may need to change the BOV spring:

http://www.streettunedmotorsports.co...ring_chart.jpg

The BOV in the kit comes with an 11psi spring, since the vacuum falls in that range with the stock engine. A shop like AAM should know this.

Well I found two things, 1. They did not tap the manifold for the vacuum lines for the blow off valves; instead they used the big vacuum hose that goes off manifold into the firewall and t fitted twice off of it. I will have to wait and see if they found the vacuum at idle and ask what spring they used.
2. My car on their dyno sheet hit 15.5 pounds boost, so should I find the vacuum and use that to detriment what spring I need? Or is he using the boost controller to control the level of pressure so he doesn't need to change out the spring? AKA can i do it myself( which i'm not sure i can do)?

Is my car ok at the moment?

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