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Help Identify this 500EFI Cam??
3 Attachment(s)
The motor is a 2001 500efi, the motors have been into before ,they are sopose to be stock cams,so no telling ?Its does have a cast gear on it.I did not ck the lift ,I just asumed it was stock
Here is a pick . I dont reconize the #'s The bottom # looks like a date? The other # on it was 16516 -99d1a maybe its a 516?? Thanks for the help :D Rob |
Re: Help Identify this 500EFI Cam??
Strip
That is a Gen IV & Gen 5 cam. Your block is a Gen 6. I looks like from the timing cover gasket that you have the cast aluminum cover with the Oring gasket. The timing chain in the other pictures is a GM that was used in the Gen V 502. The new Gen 6 cams are turned down on the front nose of the cam and a retaining plate is bolted to the two threaded areas on top and bottom of the block right around the cam. That keeps the cam from walking. There was not any cam button used in your motor that appears. The cam had to be walking around. Those are bullet grind cams. The markings do not look like Crane or Comp. You can call a few cam company's and maybe someone will recognize the markings. Its a good thing you took these apart. Whoever put these motors together knew it was not going to be theirs. I bet nobody will fess up to the mixed mess you inherited. It looks like there are not major problems, but will need a lot of attention. The white valve, was that on an intake port that had the leaking gasket? That could be the lean condition. Pistons are normally .022 to .025 in the hole. It looks like your block has been decked .020. I would not deck it any more unless absolutely necessary. Have the heads been decked? CC them to find out. Usually any combination or decking and shaving heads should not be over .030 total. That may be the answer with the double head washers on the one head bolt. There is one head bolt on the right hand side of the head that sets down, that seems to have less thread area. I always make sure the bolts go down to the head without the washers before installing. That can be some on the alignment problems. Use Mr gasket intake gaskets. They are much wider around the ports. I think that is a 108 that has the bolt opening over the runners. I ran your CR again with .004 piston height, 8.68CR. I made a Excel spread sheet for keeping clearances and cost I will mail you if you want it. |
Re: Help Identify this 500EFI Cam??
There's a guy on here RMBUILDER,he will be able to identify those for you.Hey LINSTER how you going with that manifold?
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Re: Help Identify this 500EFI Cam??
Originally Posted by Linster
Strip
That is a Gen IV & Gen 5 cam. Your block is a Gen 6. I looks like from the timing cover gasket that you have the cast aluminum cover with the Oring gasket. The timing chain in the other pictures is a GM that was used in the Gen V 502. The new Gen 6 cams are turned down on the front nose of the cam and a retaining plate is bolted to the two threaded areas on top and bottom of the block right around the cam. That keeps the cam from walking. There was not any cam button used in your motor that appears. The cam had to be walking around. Those are bullet grind cams. The markings do not look like Crane or Comp. You can call a few cam company's and maybe someone will recognize the markings. Its a good thing you took these apart. Whoever put these motors together knew it was not going to be theirs. I bet nobody will fess up to the mixed mess you inherited. It looks like there are not major problems, but will need a lot of attention. The white valve, was that on an intake port that had the leaking gasket? That could be the lean condition. Pistons are normally .022 to .025 in the hole. It looks like your block has been decked .020. I would not deck it any more unless absolutely necessary. Have the heads been decked? CC them to find out. Usually any combination or decking and shaving heads should not be over .030 total. That may be the answer with the double head washers on the one head bolt. There is one head bolt on the right hand side of the head that sets down, that seems to have less thread area. I always make sure the bolts go down to the head without the washers before installing. That can be some on the alignment problems. Use Mr gasket intake gaskets. They are much wider around the ports. I think that is a 108 that has the bolt opening over the runners. I ran your CR again with .004 piston height, 8.68CR. I made a Excel spread sheet for keeping clearances and cost I will mail you if you want it. Thanks I figure rmbuilder would chime in?? :D |
Re: Help Identify this 500EFI Cam??
you would never want to run the piston that far into the hole you are just asking for problems (preignition) plus the power potential will never be there !! if i were building this motor i would keep the quench around .038-.040 that would be the best combo!
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Re: Help Identify this 500EFI Cam??
Rob,
I do not have my data base available to me at this time but I can give you some information.The copper color between the lobes leads me to believe its a Crane carburized 8620 billet core. The 16-23-99 code means manufactured on the 23rd week of 1999. I looks as it's a standard Merc cam from the MHP markings but for the grind I'd need my DB. Measure the lift on one set of lobes. It might also be a takeout from an earlier Merc motor judging by the fact that its not the correct cam for your application. Bob |
Re: Help Identify this 500EFI Cam??
Originally Posted by rmbuilder
Rob,
I do not have my data base available to me at this time but I can give you some information.The copper color between the lobes leads me to believe its a Crane carburized 8620 billet core. The 16-23-99 code means manufactured on the 23rd week of 1999. I looks as it's a standard Merc cam from the MHP markings but for the grind I'd need my DB. Measure the lift on one set of lobes. It might also be a takeout from an earlier Merc motor judging by the fact that its not the correct cam for your application. Bob It looked to me to be a billet core also but it has a cast gear on it, and the dist gear's cast Do you think you have the #'s in your data base, please let me know. thanks Rob |
Re: Help Identify this 500EFI Cam??
I wonder if it is a Carbed 500hp cam?? By the dates on it?
The othere cam has a different type of wrighting on it mph 301 date is 16-33-00 :eek: Stamped 169621B OOF2b I figure its a 621 cam 301 maybe the duration?? |
Re: Help Identify this 500EFI Cam??
I found this
http://www.cranecams.com/index.php?s...21&lvl=2&prt=5 Part Number: 169621 Grind Number: HR-292-2S-14 IG Engine Identification: Start Yr. End Yr. Make Cyl Description 1996 Up CHEVROLET 8 HYD. ROLLER WITH CAST IRON DISTRIBUTOR DRIVE GEAR Engine Size Configuration 454-502 C.I. V Valve Setting: Intake .000 Exhaust .000 HOT Lift: Intake @Cam 352 @Valve 598 All Lifts are based on zero lash and theoretical rocker arm ratios. Exhaust @ Cam 359 @Valve 610 Rocker Arm Ratio 1.70 Cam Timing: TAPPET @.004 Lift: Opens Closes ADV Duration Intake 33.0 BTDC 79.0 ABDC 292.0 ° Exhaust 84.0 BBDC 34.0 ATDC 298.0 ° Spring Requirements: Triple Dual Outer Inner Part Number 99896 Loads Closed 132 LBS @ 1.906 or 1 29/32 Open 405 LBS @ 1.326 Recommended RPM range with matching components Minimum RPM 3000 Maximum RPM 6500 Valve Float 6800 Cam Timing: TAPPET @.050 Lift: Opens Closes Max Lift Duration Intake 6.0 BTDC 44.0 ABDC 109 230.0 ° Exhaust 57.0 BBDC (1.0) BTDC 119 236.0 ° Remarks: CRANE 16535-16 LONG TRAVEL HYDRAULIC ROLLER- LIFTERS MUST BE USED WITH GREATER THAN .570 LIFT CAMSHAFTS TO PREVENT ALIGNMENT BAR DISENGAGEMENT. |
Re: Help Identify this 500EFI Cam??
#'s on the cam end still dont match anything,Anybody ?? :confused:
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