Ford Injector Flowbench Data - Check it. - Third Generation F-Body Message Boards

anesthes · 01-17-2004, 12:22 PM

I sent my Ford SVO 36# injectors to Rich at <a href="www.cruzinperformance.com">Cruzin Performance</a> for
testing.

His response after testing was:

"Hi Joe,
I have flow tested your injectors. They appear to be in "like new" condition
and are all flowing within 3% of each other. I don't think that cleaning
them will improve their flow."

Now these are for Ford 36# injectors, tested at 43.5 psi. As you can see the 36# injectors flow at, 36#. I was under the asumption like a lot of people, that Ford 36# injectors flor around 38#..

-- Joe

anesthes · 01-17-2004, 12:23 PM

<!DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.0 Transitional//EN'>
<LINK rel='STYLESHEET' type='text/css' href='css/rudiments.css'>
<html>
<head><title>Injector Data</title></head>
<body bgcolor='white'>
<form method='POST' action='index.php?action=saveinjdata'><input type='hidden' name='id' value='599'>
<table border='0' width='85%' align='center'>
<tr><td align='center'></td>
<td> <br><br> <br><P align='right'>Date: 1-15-04 <br> Vehicle: N/A<br>
Model: F7PU-A4A<br>
Injector serial #: 401151-401158</td></tr>
</table><center>Preliminary Test Results</center>
<table border='1' align='center' width='75%' ><tr><td>Test pressure = 43.5 psi</td><td align='center' colspan='8'>Injector No.</td></tr>
<tr align='center'><td></td><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>7</td><td>8</b></td></tr>
<tr><td>Test 1. Injector Resistance</td><td>14.4</td><td>14.2</td><td>14.5</td><td>14.4</td><td>14.4</td><td>14.5</td><td>14.4</td><td>14.2</td></tr>
<tr><td>Test 2. Leak Down Test (<b>P</b>*** / <b>F</b>ail)</td><td>P</td><td>P</td><td>P</td><td>P</td><td>P</td><td>P</td><td>P</td><td>P</td></tr>
<tr><td>Test 3. Spray Pattern (<b>G</b>ood / <b>F</b>air / <b>P</b>oor)</td><td>G</td><td>G</td><td>G</td><td>G</td><td>G</td><td>G</td><td>G</td><td>G</td></tr>
<tr><td>Test 4. 60 Second Pulsed Flow Delivery (mL)</td><td>96</td><td>93</td><td>95</td><td>93</td><td>95</td><td>93</td><td>95</td><td>94.5</td></tr>
<tr><td>Test 5. 100mL Pulsed Volume</td><td>100</td><td>97</td><td>99</td><td>97</td><td>99</td><td>97</td><td>99</td><td>98</td></tr>
<tr><td>Test 6. 10 Second Static Flow (mL)</td><td>70</td><td>68</td><td>70</td><td>69</td><td>70</td><td>68</td><td>70</td><td>70</td></tr>
<tr><td>Test 7. 100mL Static Flow</td><td>100</td><td>97</td><td>100</td><td>98</td><td>100</td><td>97</td><td>100</td><td>100</td></tr>
<tr><td>Test 8a. Injector Coil Test - On</td><td>7.15</td><td>7.04</td><td>7.16</td><td>7.15</td><td>7.12</td><td>7.17</td><td>7.07</td><td>7.05</td></tr>
<tr><td>Test 8b. Injector Coil Test - Off</td><td>7.19</td><td>7.09</td><td>7.21</td><td>7.19</td><td>7.17</td><td>7.22</td><td>7.12</td><td>7.1</td></tr>
</table><center>Test Results After Service</center>
<table border='1' align='center' width='75%' ><tr><td>Test pressure = 43.5 psi</td><td align='center' colspan='8'>Injector No.</td></tr>
<tr align='center'><td></td><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>7</td><td>8</td></tr>
<tr><td>Test 1. Leak Down Test (<b>P</b>*** / <b>F</b>ail)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>
<tr><td>Test 2. Spray Pattern (<b>G</b>ood / <b>F</b>air / <b>P</b>oor)</td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>
<tr><td>Test 3. 0 Second Pulsed Flow Delivery (mL)</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr>
<tr><td>Test 4. 100mL Pulsed Volume</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr>
<tr><td>Test 5. 10 Second Static Flow (mL)</td><td>70</td><td>68</td><td>70</td><td>69</td><td>70</td><td>68</td><td>70</td><td>70</td></tr>
<tr><td>Test 6. 100mL Static Flow</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr>
<tr><td>Approximate pound-per-hour flow</td><td>35.92</td><td>34.89</td><td>35.92</td><td>35.41</td><td>35.92</td><td>34.89</td><td>35.92</td><td>35.92</td></tr></table><center>Parts Replaced</center>
<table border='1' align='center'><tr><td>Pintle Caps</td><td>Seals</td><td>O-Rings</td><td>Screens</td><td>Hoses</td><td>Clips</td></tr>
<tr align='center'><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr>
</table><center>Comments</center><table border='1' align='center'><tr><td></tr></td></table></form></body></html>

8Mike9 · 01-17-2004, 12:32 PM

Well now that is some new info, contrary to popular belief.

I wonder if the 24lb/hr injectors are the same?

anesthes · 01-17-2004, 12:34 PM

I dunno. I just sold my set of 24#.

I'm sure _someone_ on here has had a set of 24# flow benched.

I was sick of "guessing" I know most everyone says the SVO's flow more, I needed to know. Plus if mine were dirty, I wanted them cleaned.

-- Joe

BadSS · 01-28-2004, 01:23 AM

Just thought I would share the numbers from a recent cleaning of a set of 30# "SVO" injectors done at Cruzin Performance.

Test pressure = 43.5 psi
Injector No.
1 2 3 4 5 6 7 8
60 Second Pulsed Flow Delivery (mL)
85 88 87 87 87 88 87 88
100mL Pulsed Volume
97 100 99 99 99 100 99 100
20 Second Static Flow (mL)
114 117 116 116 117 118 117 118
100mL Static Flow
97 99 98 98 99 100 99 100
Approximate pound-per-hour flow
29.25 30.02 29.76 29.76 30.02 30.28 30.02 30.28

These two tests sure make you wonder about the supposed difference in the Ford vs Chevy injector ratings,, huh? Anyone else have their injectors flowed recently and care to share?

anesthes · 01-28-2004, 07:52 AM

Quote:

These two tests sure make you wonder about the supposed difference in the Ford vs Chevy injector ratings,, huh? Anyone else have their injectors flowed recently and care to share?

Well I used to think this too, because some "trusted" folks have said that on here. Fact is, I can't recall ever seeing any test data to back that theory up. We've got two test cases where the Ford injectors flow exactly what they are labeled as, at 43.5 psi. This leads me to believe Ford injectors flow the same as any other.

-- Joe

anesthes · 03-07-2004, 08:15 PM

Moving this to the top. Need more data here. (no heresey, Just post real data please).

-- Joe

PerthZ28 · 03-11-2004, 12:07 AM

How are injectors rated? Is the lbs/hr rating with the injector held open and 43.5psi applied to it?

anesthes · 03-11-2004, 07:09 AM

They set the test pressure, and time how long it takes to dump 100ml (or another amount) of fluid while the injector is static.

When testing "known" injectors, they can set the pressure and set how long to spray fluid. So say 36# injectors should take xxxx long to dump 100ml, they will do that, then check each tube. If they are all at 100ml, then all the injectors are great. Some may be higher or lower.. They should all be within 3%.

If the tubes have way less than 100ml, then either the injector is smaller than originally thought, or VERY dirty. After some cleaning, they will retest them.

If the test fluid is the same specific gravity of gas, then they have the exact #/hr rating. If not, they have to convert the numbers based on how different the test fluid is.

-- Joe

PerthZ28 · 03-11-2004, 09:08 AM

So by static you mean that they pulse the injector on and leave it on for the time it takes to discharge 100ml?

anesthes · 03-11-2004, 09:38 AM

They just leave it on. No pulse.

-- Joe

Chris89GTA · 03-11-2004, 12:01 PM

From what I understand, GM injectors are flowed and rated at a higher PSI than Ford injectors. That is why they a Ford 24# injector flow more like a higher rated GM injectors. Bump up the pressure on the Ford injectors and it will flow more than its rated at. I can't remember what GM injectors are rated at though. Any body know what GM injectors are rated at?

EDIT. I found the #s. Ford's are rated at 39.5 psi, and the GM's at 43.5. So the Ford's should flow more at the 43.5 mark than the GM's. Maybe you guys stumbled on something...

anesthes · 03-11-2004, 12:48 PM

Quote:

From what I understand, GM injectors are flowed and rated at a higher PSI than Ford injectors. That is why they a Ford 24# injector flow more like a higher rated GM injectors. Bump up the pressure on the Ford injectors and it will flow more than its rated at. I can't remember what GM injectors are rated at though. Any body know what GM injectors are rated at?

EDIT. I found the #s. Ford's are rated at 39.5 psi, and the GM's at 43.5. So the Ford's should flow more at the 43.5 mark than the GM's. Maybe you guys stumbled on something...

Yeah, we stumbled on the fact that its a myth. They're all rated at 43.5 psi.

-- Joe

PerthZ28 · 03-11-2004, 08:26 PM

The difference is probably more likely to come from the fuel density used in Cruizin's calculations. From these results, they are using a fuel SG of 0.648 which is very light. I'm not sure what the fuel SG is in the US but in Australia it is between 0.72 and 0.75 depending on the octane rating etc. I doubt that US fuel differs very much from this range.

If these calculations were based on a fuel SG of 0.72, the 35#/hr flowrates become 39.9#/hr.

anesthes · 03-11-2004, 10:02 PM

The results I posted were calculated at the specific gravity of unleaded pump gas.

The test fluid is different, and the computer calculates it out.

-- Joe