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12-17-2017
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#21 |
 
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
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Re: Larger Intake Valve Cylinder Head Work
Love those velocity stacks & 3" primary tubes. Are you building a new GT car? Individual cylinder throttle body w/injector? Just kidding of course, but with you there's no half-stepping!
Awesome work Phil!
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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12-17-2017
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#22 |
 Join Date: Jul 2009
Location: Texas
Posts: 793
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Re: Larger Intake Valve Cylinder Head Work
Great work Phil
Dave |
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12-18-2017
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#23 | |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: Larger Intake Valve Cylinder Head Work
Quote:
Glad you like my home made velocity stacks. Found them at Home Depot in the the plumbing department PVC pipe fitting section for $1.79. A little time on the lathe and Voila! Shop vac floor attachment tube was the donner for the primary exhaust extension pipe. Though it appears to be larger ID measures 2”
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake Last edited by Jagdpanzer; 12-18-2017 at 10:21 AM. |
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12-20-2017
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#24 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: Larger Intake Valve Cylinder Head Work
Ran the flow test this morning
Here is the head mounted up on the SF-600 flow bench with test engineer Justin getting ready to hit the switch:  Flowing intake ports:  Flowing the exhaust ports:  And the results:  Happy to report the achieved flow numbers were inline with expectations so the larger intake valves and additional porting work paid off. Was especially pleased with the flows at lower intake valve lift points. The shop that performed the test had never seen a LT5 head before and was very impressed. Said it was right up there with the best SBC LS aftermarket heads they've tested on a 4.125" cylinder bore.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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12-20-2017
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#25 |
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Re: Larger Intake Valve Cylinder Head Work
Well Done Phil. Thanks for sharing this development with us.
Jim
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If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member |
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12-20-2017
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#26 |
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Join Date: Jun 2013
Location: Toronto
Posts: 783
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Re: Larger Intake Valve Cylinder Head Work
That is awesome !! Can’t say I’m all that familiar with LT5 flow numbers but have seen a few that aren’t that high that’s for sure ! Any before numbers or any stock numbers for reference ? Would be cool to graph it just for comparison purposes
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12-20-2017
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#27 |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: Larger Intake Valve Cylinder Head Work
Great Job Phil.
 Numbers look almost identical to the ones i have done 15 years ago with stock valves. Just for comparison. Intake .300 275 .400 328 .450 337 Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage Last edited by Pete; 12-20-2017 at 06:10 PM. |
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12-20-2017
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#28 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: Larger Intake Valve Cylinder Head Work
Thanks Pete
You are the LT5 porting expert, I am just a mere novice.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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12-20-2017
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#29 |
Join Date: Mar 2014
Location: Warrington PA
Posts: 1,914
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Re: Larger Intake Valve Cylinder Head Work
Congrats Phil.....glad you reached your goal.....
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Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member |
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