Flowbench Data

[safetybuzz]

Hello,

I was wondering if anyone would have a link or would be able to attach a graph of flowbench data obtained from the LQ1 engine. Situation being, we have a flowbench at our school where I spent the fair share of my day recording values that think may be a bit off (for .431" of valve life I have 353.7CFM) and it would be nice to have something for comparison...

*edit* I was testing the intake ports

[RednBlack]

You have any pics of the Flo Bench? And how you did the test?

[safetybuzz]

You have any pics of the Flo Bench? And how you did the test?

I was using the Superflow SF-300 Link to SF-600, but they are very similar

I did the test as per the manual (I think ); I made a plenum type guide around the intake port out of plasticine and set my valve lift to (0.072"). I then began on the 100CFM setting (I couldn't start @ 25CFM nor 50CFM because the my percentage scale remained at 100%) and adjusted the intake flow lever until I hit 25 on the vertical manometer. At this point I recorded 65% on my percentage scale. I continued adjusting the valve lifts (0.144, 0.216, 0.288, 0.359, 0.431) and flow rates (200CFM, 300CFM) accordingly; ensuring that I always read the percentage scale when I adjusted the pressure to 25 on the vertical manometer...

So in the end I was left with the following numbers:

0.072 lift @100cfm @/65% = 65.65 CFM
0.144 lift @200cfm @/67% = 134.0 CFM
0.216 lift @200cfm @/86% = 172.0 CFM
0.288 lift @200cfm @/99% = 198.0 CFM
0.359 lift @300cfm @/76% = 224.9 CFM
0.431 lift @300cfm @/90% = 242.1 CFM

Theres a calibration chart for the flowbench that I used to calculate the flow rate as well (eg. for the 100cfm setting multiply the percentage value by the calibrated value; in this case 101: 65 x 101 (not 100), same goes for the others)

*edit: I had an incorrect value of 353.7CFM for the 0.431" lift, it's supposed to be 242.1CFM
Are these values reasonable for this type of head?

[RednBlack]

Just curious as to why .072 lift was used between tests? Kind of an odd number. And how did you do the opening of the valves?

.431 is way out of the park for the LQ1. .370 lift. I see where you got your numbers.

.431 devided by 6 = .718833. .072

Good numbers though. Try .061 between tests. Stop at .370.

[safetybuzz]

Just curious as to why .072 lift was used between tests? Kind of an odd number. And how did you do the opening of the valves?

.431 is way out of the park for the LQ1. .370 lift. I see where you got your numbers.

.431 devided by 6 = .718833. .072

Good numbers though. Try .061 between tests. Stop at .370.

I made an adapter plate with two angled bolt taps to push the valves from the top, then placed dial indicators on top of the bolts to record my lifts...

The valve lifts where originally obtained using some L/D ratios:
0.05 to 0.35 (0.05 increments) multiplied by the diameter of the valve head(1.4375)

1.4375 x 0.05 = 0.071875 ~ 0.072

I will take your advice however and try to switch up with 0.061" valve lifts.

[SappySE107]

http://60degreev6.com/showthread.php?t=34587

[safetybuzz]

http://60degreev6.com/showthread.php?t=34587

[FieroWannaBe]

what year heads are you testing?

[safetybuzz]

what year heads are you testing?

I believe 1994...