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#61
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Pontiac guys have only recently stepped up (in last 5 years on a basic engine design created in the early 1950s) to actual race camshafts with big lift (1" numbers vs the Ram Air IV cam mentality. So like Bill C says, step up and get a proper diameter cam or as I say "stay on the porch and complain about how the details don't matter". Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#62
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I have seen alot of guys who race or who are building an engine that has to appear "correct" so they are using intakes, and heads and other parts that are not "the best". But that doesnt mean you need to half way do everything else. If you shoot for perfect on everything else and then live with the deficiencies of the old stock appearing intake and heads that you have to use, you still are going to perform better than everyone elses "stock appearing" deal. I guess what I am saying is this, Just because every part you are using hasnt been perfected and tuned perfectly for the specific build, doesnt mean all is for nothing. Every specific task in a build that is done as close to perfectly as possible, will benefit the build, no matter how slight or unmeasureable the performance gain.
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#63
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So basically, gearbanger, I agree with you that yes, even though it may not be "perfect" you should at least try to make it that way with-in your physical and financial capability. Look at Marcella and his personal stuff. All of it is well thought out, and is as good as he can make it personally. A lot of personal pride there. Only thing that he really needs is track time and refining his assembled parts. So if you agree, that "I can't make it perfect and it is what it is", then you have already lost in my book. There are different levels of execution of a task too. I consider Marcella to be a Master on the execution side of the game. Maybe not quite there on the Track Time or the Tune-up but he has the execution side of the game down cold. If there were more guys like Marcella or Twin Turbo Bill out there pushing the limit of their skills we as a group would be a lot farther down the road on how fast a Pontiac can really go down the track, be it a True Street Car Guy, a Week-end Warrior, a local Class Racer, or a "No Time" 12th Street Bad Mutha. JMO Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#64
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Allpontiac Grand Am .977 net lift on intake after lash,bend,and flex.Next engine will be 1.040 NET lift.Bill C.
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Checkered Flag Machine & Ceralli Competition Engines Racing engines and induction development http://www.checkeredflagmachine.net/ |
#65
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Bill, ever look at the cam bore hole in the latest Ford Pro Stock Engine?
Or the Valve "clocking" vs Rod centerline in the combustion chamber? http://www.yellowbullet.com/forum/sh...d.php?t=143485 Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#66
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Guys coming over in the next half hour to degree my cam 4 degrees advanced. Sure hope we get it right. Alot of info to digest.
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#67
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Another picture of the block: Cam hole looks bigger than the main bore hole, LOL!
http://www.fordracingparts.com/parts...KeyField=11447 Tom Vaught Yes, Racers have been aware of the wet noodle camshaft deal for a looonnnng time, Brian.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#68
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If the guys have done it a few times and are patient, you personally can learn a lot about the process. Good luck with that deal. Post up your findings.
Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#69
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OK we used the stop. Turned it CW then CCW and split it. Used a dial indicator to find .050 Now I see what your talking about LOL Also set the valve lash on a solid roller for the 1st time. Lot easier with the vally pan off
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#70
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Good job, you've had the heads in your possession for less than a week and they are on the motor! Where did you end up putting the cam? Looks like you will be ready when the weather turns. Calvin Hill Hill Performance 708-250-7420 |
#71
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4 degrees advanced
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#72
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Was the cam ground that way? Were you able to go dot to dot or did you advance the cam with a key or a multi position timing set?
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#73
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Multi postion timing set. Heres the cam card: http://s44.beta.photobucket.com/user...jpgx2.jpg.html
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#74
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so, the intake is ground 4 degrees advanced. did you set it at the prescribed 106 or did you advance it four degrees from that, to 102?
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#75
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Same cam I have in my 474, in on a 106. Worked great.
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#76
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... why thank you Tom, i appreciate that ... |
#77
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__________________
Checkered Flag Machine & Ceralli Competition Engines Racing engines and induction development http://www.checkeredflagmachine.net/ |
#78
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#79
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That being said, Bill, comparing a 70 mm 5 journal Pontiac camshaft support system to a 9 journal 70 mm Ford Pro Stock support system might give people the wrong idea. You would need to up the stick journal to come close to the same rigidity. Ideal system would be to mod the block for a raised cam tunnel with the 9 journal cam bearing system as the large sticks are all custom anyway. Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#80
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The piston stop is just one basic part of the process. If the process is flawed then the best dial indicator means nothing. Did setting the camshaft where the camshaft designer wanted it to be give you more power? Who knows, but at least you tried to get that part of the equation the best that you could make it. Tom Vaught
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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