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 3Likes
06-26-2014, 05:20 PM
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CC Member
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Join Date: Feb 2012
Location: Keller,
TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
Posts: 549
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Not Ranked
I don't have the paperclip. I may try that tomorrow to see how far they are opening. If they are not opening all the way, i'll use a lighter spring. I will try a heavier one too just to see.
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06-26-2014, 05:25 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by Texasdoc
I don't have the paperclip. I may try that tomorrow to see how far they are opening. If they ate not opening all the way, i'll use a lighter spring. I will try a heavier one just to see.
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A zip tie cinched down on the secondary shaft, on the opposite side of the vacuum secondary, that is snipped off leaving about an inch of a stem, is a wonderful indicator. The shaft rotates within the zip tie when the secondaries open, and then the zip tie stub "points" to how far the secondaries opened when the shaft rotates closed. Do a quick search on these forums for more info. I'm sure I've posted pics of mine many times before. I just keep the zip tie on there all the time and have it rotated out of the way when not testing. |
06-26-2014, 07:08 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Quote:
Originally Posted by patrickt
I just keep the zip tie on there all the time and have it rotated out of the way when not testing.
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 Testing for WHAT??
Beige paint, two roll bars covered with insulation on hundred year-old Yokomas---testing for low ET to the laundromat??? 
__________________
Chas.
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06-26-2014, 07:17 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by ERA Chas
Testing for WHAT??
Beige paint, two roll bars covered with insulation on hundred year-old Yokomas---testing for low ET to the laundromat??? |
Yes, I periodically push the zip tie over to measure the secondary opening, not on full WOT, but rather on partial acceleration. The secondaries should open partially even on a spirited trip to the oyster bar -- and I am sensitive to even the slightest change in the performance of engine. Yes, Chas. -- even the slightest.  |
06-26-2014, 07:27 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Quote:
Originally Posted by patrickt
-- and I am sensitive to even the slightest change in the performance of engine. Yes, Chas. -- even the slightest. |
And well you should be with only 200 asthmatic horses on hand... 
__________________
Chas.
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06-26-2014, 07:30 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by ERA Chas
And well you should be with only 200 asthmatic horses on hand... |
Ahhh, but I have two hands.  |
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