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#1
02-21-2019, 07:24 PM
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Where have we heard this before?
Mechcanic wrote: ↑Wed Feb 20, 2019 12:33 am
CamKing wrote: ↑Tue Feb 19, 2019 10:26 am Cam# BBC, HR75375-78360-112 241/251 @.050" .375"/.360" Lobe Lift 112 LSA Hi Mike,. Thanks, the LSA seems high compared to DV math. But I am a novice so I appreciate the advice/spec. So a question that I would really like to learn more about is the cam angle setting. Straight up? Advance? Retard? Was hoping to read the post on that. I searched but could not it elsewhere. Any thoughts? Thanks, Paul I would install it on a 108 Intake Centerline. I widened the LSA to extend the top-end power, and increase vacuum. It will cost a little peak torque, but with a 4.25" stroke, torque won't be an issue. Mike Jones Jones Cam Designs Denver, NC jonescams@bellsouth.net http://www.jonescams.com (704)489-2449 Hmmm, spread the lobes out on a big street engine to make it idle/drive better and move the power band up. Cutting edge stuff there. Jones specd’ a cam out for my 517 that was a virtual clone of the SD Road Paver on a 112 LsA. I bought a RP from Dave B. just because he’s treated me fairly in the past and always delivered what he promised. Dave wanted me to run about 10 more degrees on a 114 LSA but at the time I wanted an easy driving car. I don’t think it would have made much of a difference since as it stands the engine is a little too much for the car as it’s set up now, which isn’t really a bad thing.
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
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#2
02-21-2019, 07:39 PM
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So you just got a cam recommendation yesterday? What is your idle rpm and vacuum with your 517/RP? I'm going to get a 3123/3116 CC for my 494 (246/252 at 0.050", 0.400" lobes) and wanted an idea of vacuum level.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#3
02-22-2019, 05:14 AM
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I got it a few years back. At 750 RPM in drive it’s between 10-11.
https://m.youtube.com/watch?v=YAFYcoRm9fI
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
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