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Sad, Sad, Sad Dyno Graph


Guest Hal

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Guest Hal

Well, something is up with my car AGAIN. It didn't make much power, and I couldn't "spool" a damn roots blower! Oh well, here is the pic. Flame away.

 

http://i49.photobucket.com/albums/f277/punkhott712/Dyno28upper4lower.jpg

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Guest Hal

All it is, is a pullied cobra. I did the lower, IPS did the upper. The boost ran fine last year.

 

I'm not really upset about the power, that will be fixed later. I'm lost in regards the boost though. Neither I nor Brian have ever seen a cobra dyno like this. The motor appears healthy right now, I'm worried about the blower though. I may have killed it last year.

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Guest Hal

Here is how a typical cobra graph should look.

 

http://www.modularfords.com/forums/attachments/2003-2004-mustang-cobra/37386d1173886489-dyno-test-results-stock-03-jlt-and-jlt-cf-cai-tn_03-cobra-stock-jlt-cf-jlt.jpg

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It certainly looks like a lot of belt slip to me. Here's my boost graph with a 2.80 upper only Eaton. I was seeing 12PSI right off the hit. You should be at 16PSI at 2300-2400 RPM. Low timing also killing your numbers a bit but not a bad idea for boost level on pump gas. Make sure your seeing 20in of vac. at idle. you could have a leak.

 

http://home.columbus.rr.com/cobrapics/boost.JPG

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Guest Hal
Yeah, there are a lot of different options for it. I had a snub idler before, but got rid of it over the winter. I'm still playing with it and working on what I want to do with it and some other things.
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