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#41
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Very interesting with the 3316 vs 3319 graph.
Note the section for LIFT in the link below. Where two lift curves are also shown for two different lobes, as here both have a duration of about 250 degrees at 0.050. And one has more lift. And they state in most cases the additional flow throughout the heart of the lift event is significant and it translates directly into improved performance. https://www.tildentechnologies.com/C...rformance.html .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#42
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Dynomation prefers the 3319 over the 3116.
463 @ 6200 RPM in Rick Jones software. Hyd roller. |
#43
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More lift more duration at peak flow.
But if the lower lift cam has more duration earlier it can have more flow at peak piston speed Bore = 4.155 Stroke = 4.25 Rod Length = 6.625 RPM = 6500 Wrist Pin Offset = 0.0 Piston Speed is 76.73611 Feet per Second Piston Speed is 4604.16667 Feet per Minute Maximum Piston Velocity 7598.323903 FPM @ 73.67589 Degrees Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#44
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MANY years ago David Vizard developed a program called Cam Master, a comprehensive computer program that offers precise cam selection. It's an empirical program based on over 50,000 individual engine dyno pulls on various engine combinations. After input the program provides the specifications for a recommended cam, and topping the list is valve lift. The engine wants all the lift it can and the valve lift figures provided by the computer program indicate engine requirement but it may not be mechanically achievable.
(and my comment, in some cases prohibitive because of cost limitations) And to muddy the water further with something related.... "Peak intake airflow is a common reference when comparing cylinder heads. While that figure is very important, especially for attaining strong peak horsepower, a cylinder head spends very little time at peak valve lift and considerably more time reaching that point. Considering airflow throughout the entire valve lift range is more important. Strong low- and mid-lift airflow starts cylinder fill quickly and effectively and continues filling the cylinder until the intake valve closes." HOW TO BUILD MAX-PERFORMANCE PONTIAC V-8S .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#45
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Quote:
Where did you find this? Thanks, Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#46
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I don't think the quote Steve mentioned is here but other information.
http://www.motortecmagazine.net/a-ne...ms-speed-spec/ |
#47
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David Vizard's Cam Master program was featured in National DRAGSTER. Also Muscle Mustangs & Fast Fords magazine in 2002. Years ago David worked in conjunction with Denny Wycott of Motor Machine & Supply in Tucson, Arizona. He is mentioned in the article above. After visiting Crower and David Vizard in California I met with Denny in Tucson on my way back to Texas. Later I had Denny do some profiles for a previous 462 engine with the Cam Master program..
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 10-21-2021 at 10:35 PM. |
#48
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Mike / Steve
Thanks for the information. I have a copy of David Vizard / Motor Machine & Supply Cam Master program. I was just trying to understand some more of its history. Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#49
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Ok, super quick turn around from Kauffman. This is what he sent. Cam card is posted. Looks like comp hydraulic roller 556/550 lift I'm assuming figured with 1.5 rockers? 254/258 duration @.050 ground on a 110. What lift can I expect with 1.65 rockers? Thoughts on this cam?
__________________
1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#50
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.612 on intake, .605 on ex.
1.7 rockers will get you around .630 lift. IMO its a nice street cam for E heads. High Ports want more lift. With this cam you are stopping lifting the valve right before the head starts to shine the most. It all depends on what you are after. It could very well do exactly what you want it to do. Last edited by Dragncar; 10-22-2021 at 05:09 PM. |
#51
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Xtreme XFI Int. Rated Duration @ .006 Tappet Lift
3020 304 254 176 .370 Xtreme XFI Exh. Rated Duration @ .006 Tappet Lift 13148 310 258 178 .366 Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#52
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Quote:
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#53
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The cam was probably sitting on a shelf
The "20" in the serial number for the year ? .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#54
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Quote:
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#55
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Yes it was definitely sitting on the shelf there at his shop , I did tell him I would put some street miles on it. Right now I'm not close to any tracks outside new england dragway and it's 2 hrs away so my trips there might be once or twice a year. We anticipate a move back to Florida hopefully in a year or two so I should be 1/2 hr away From Bradenton Motorsports Park. when that happens I will go a couple times a month so a bigger cam makes sense at that point.
__________________
1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#56
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I spaced where you previously said in the thread they already had it on the shelf. Ok because you needed it 'now' and if he had to order another custom cam with a more appropriate lobe lift that would have taken weeks if not months.
Go enjoy it. .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#57
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Sure will thanks! I would be happy with hp numbers between 575-600 for right now. Maybe with a touch of porting and more cam later I can reach 700, honestly at that point I know my matching numbers block is in jeopardy so it might be an aftermarket block .
__________________
1969 GTO street strip project 11.1 forged 461, highport heads 1995 Trans-am 420 ci sb 14:1 compression 9"ford 9.89@132 1.34 60ft SOLD! |
#58
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The heads unported will support 700 hp.
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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