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Old 12-03-2008, 04:02 PM   #1
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2.0 Zetec JRSC w/BBK dyno results

Here is the dyno results of my JRSC install.
The before run is with the car totally stock as I bought it.
The after run is with the car stock other than the JRSC. I didn't use the Ford PCM reflash, but went the the SCT xcal.
The day we did the final dyno tuning and testing it was about 92 degrees and 90% humidity. It's tuned for 93 octane fuel.

The supercharger works great, they should come this way from the factory, makes almost no noise, I have heard power steering pumps make more noise than the supercharger, on my last road trip I got 35MPG averaging 65 MPH.





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Old 12-03-2008, 04:34 PM   #2
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You need to go back and finish the tuning , I wouldnt make boost till that AF is properly adjusted , and other things , looks to me this may be his first Focus tune and there is a lot that needs doing

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Old 12-03-2008, 04:42 PM   #3
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What's wrong with the A/F ratio? 12.25 not good enough for boost?
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Old 12-03-2008, 04:47 PM   #4
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just n case your not sure who TOM is he is the tune master. He has tuned about any car you can think of and knows how to read a dyno sheet and a/f ratio. Now that's over with.

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Old 12-03-2008, 04:51 PM   #5
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If I am reading it right the one at the top green says A/F , If it is the lower AF then that is to lean also , you should be in the low 11`s

At 3500 your at about 14.7 should be in the lower 12`s if not high 11`s by there

at 4000 your in the 13.3 and should be in the mid 11`s

4500 your in the 12.6 and should be in the high 10`s to very low 11`s from 4500 to 6500 and you dont see the 11`s till 6500

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Old 12-03-2008, 04:54 PM   #6
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That A/F just screams melting pistons!
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Old 12-03-2008, 04:54 PM   #7
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Who tuned this?
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Old 12-03-2008, 05:12 PM   #8
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Melted pistons at 12.25? really?

I think you guys are reading the graph wrong. The A/F plot that starts at 15:1 then makes it's way down to 11:1 is the stock Ford tune, on the stock motor.

The plots that all start around 2500 rpms are the stock engine.

The plots that start around 3500 rpms are the supercharged engine.

Low 11's is what I should be running? That rich with the relativity low boost?
I didn't get the boost logged, but during the dyno runs the boosts starts around 4psi then slowly increases to 7psi at 7000 rpms.
Does that sound right?
It's making the power ford says it should.

Any other suggestions?

Last edited by youngfg; 12-03-2008 at 05:30 PM. Reason: added info
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Old 12-03-2008, 05:24 PM   #9
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Quote:
Originally Posted by youngfg View Post
I think you guys are reading the graph wrong. The A/F plot that starts at 15:1 then makes it's way down to 11:1 is the stock Ford tune, on the stock motor.

The plots that all start around 2500 rpms are the stock engine.

The plots that start around 3500 rpms are the supercharged engine.

You are still a bit lean. As Tom said you should start out around 12.0 and flatten out to around 11.0 at high rpms.
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Old 12-03-2008, 06:32 PM   #10
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LOL! To argue against experience is so childish, listen to Tom he'll teach you something. I'm not calling you a child by no means but Tom's probably been reading dyno sheets longer than you been walking. When someone of his expertise, whitch is FI, speaks you should listen not argue. Oh, by the way, it's nice to see some one on here from Kentucky, you'll have to grab some moonlite BBQ for me sometime, Dam I miss living in CentralCity.
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