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Old 07-29-2009, 10:18 PM   #1
illinipo
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SVT injectors... value file?

Planning on switching to SVT injectors this weekend as I am pretty sure mine are going static or fibrillating. The afr is randomly acting weird (to the rich side) above certain rpm and im fairly certain I'm over 150 at the wheels. Most of the time it will run right at where im commanding it, but sometimes it will drop into the 11's and climb back to 12's slowly...

I loaded the 30lb injector value file and im looking at the stock SVT tune on my friend's PRP... they are way different.

Should I copy over the values from the stock SVT tune, or should I use the 30lb injector value file? I am leaning toward using the values off a SVT tune.


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Old 07-30-2009, 06:13 AM   #2
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Just copy the values from the SVT calibration.
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Old 07-30-2009, 08:43 AM   #3
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Thanks Mike!
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Old 07-30-2009, 02:54 PM   #4
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Would it be OK to post the breakpoint, slopes, and min pulse width here for others' reference? If not just let me know and I'll move them to the SCT PRP forum (since most people who need this info can access that, too).
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Old 07-30-2009, 03:17 PM   #5
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OEM SVT Fuel Injector Scalars
Breakpoint ---- | 0.0000140000001920271
Hi Slope ------ | 0.00851599965244532
Low Slope ----- | 0.0104350000619888
Min Pulse Width | 0.000543000001925975
Pressure Drop - | 39.7000007629395

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Old 08-01-2009, 12:28 PM   #6
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Will I need to change any of the deltaP multipliers or battery voltage compensator? I'll be running 40psi and 13.8V. It looks like they are all 1.00 for 38-42psi on the stockers but I just want to be sure for the SVTs. And the stock SVT battery voltage comp is way different.


Edit, looks like the injector value file changes:
crank ISC duty cycle
breakpoint
low slope
high slope
min pulsewidth
battery voltage comp table
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Old 08-01-2009, 12:43 PM   #7
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Also since you cant use exact values sometimes it will round up/down, it tried to use 0.000541687 for min pulsewidth. I decided to put it to the next step above where it is on the SVT to be safe, 0.000545502.
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Old 08-01-2009, 03:16 PM   #8
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Battery_Voltage | PW_ms
15.9375 ------- | 0.000706000020727515
15 ------------ | 0.000706000020727515
14 ------------ | 0.000791999977082014
13 ------------ | 0.000914999982342124
12 ------------ | 0.00104600004851818
11 ------------ | 0.00121799996122718
10 ------------ | 0.00142600003164262
9 ------------- | 0.00171500002034009
8 ------------- | 0.0021100000012666
6 ------------- | 0.00386500009335577
0 ------------- | 0.00386500009335577
0 ------------- | 0.00108691002242267
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Old 08-01-2009, 03:22 PM   #9
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Note these are in PW, zetec is multiplier.
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Old 08-01-2009, 08:46 PM   #10
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Quote:
Originally Posted by illinipo View Post
Will I need to change any of the deltaP multipliers or battery voltage compensator? I'll be running 40psi and 13.8V. It looks like they are all 1.00 for 38-42psi on the stockers but I just want to be sure for the SVTs. And the stock SVT battery voltage comp is way different.


Edit, looks like the injector value file changes:
crank ISC duty cycle
breakpoint
low slope
high slope
min pulsewidth
battery voltage comp table
How about you call me tommorrow and I'll give you all the stuff you need over the phone.. you still have my number or did I even give it to you?
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