Re: issues with fresh 440
[Re: stinger]
#2722391
12/07/19 08:03 PM
12/07/19 08:03 PM
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Joined: Feb 2005
Posts: 20,179 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,179
PA.
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Did you cut the filter apart. It’s a very good thing to do after cam break in.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: issues with fresh 440
[Re: Wax]
#2722403
12/07/19 08:48 PM
12/07/19 08:48 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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Hard to tell by looking at a pic on my phone, but I don’t see anything alarming on the cam. Pull each lifter and carefully inspect the bottom of it.
When cam lobes go bad, the lifters almost always go with them. With as little run time as it has, the lifters should be perfect. If you see something iffy on one, carefully inspect the corresponding cam lobe.
Did you check for lifter rotation during assembly? What are the open and closed spring loads? What did you use for cam lube?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: issues with fresh 440
[Re: stinger]
#2722408
12/07/19 09:09 PM
12/07/19 09:09 PM
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Joined: Aug 2011
Posts: 2,861 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,861
Pattison Texas
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1
Last edited by csk; 12/08/19 01:40 AM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: issues with fresh 440
[Re: CSK]
#2722411
12/07/19 09:30 PM
12/07/19 09:30 PM
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Joined: Feb 2005
Posts: 20,179 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,179
PA.
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Is it the camera flash or shop lighting that makes some of the lobes look shinier than others?
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: issues with fresh 440
[Re: B1MAXX]
#2722501
12/08/19 11:44 AM
12/08/19 11:44 AM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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The nose of the cam lobes will have contact all the way across.
It’s extremely unlikely all the lobes are going flat, so turn the motor over by hand so you can inspect the nose of each lobe. You’re looking for one that’s obviously different than the others.
To address the oil pressure, I agree with pulling the pump all apart, clean and inspect. Actually, before you pulled the pump, you could remove and inspect how smoothly the relief valve slides in its bore.
As for the noise, I think you’d be better off with more preload. 1/2 to 1 turn....... depending on the thread pitch of the adjuster screw. I’d be shooting for .030-.040 preload.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: issues with fresh 440
[Re: lewtot184]
#2722556
12/08/19 02:17 PM
12/08/19 02:17 PM
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Joined: Jan 2003
Posts: 1,237 North Central, Indiana
Roughbird72
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,237
North Central, Indiana
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1/4 turn isn't near enough pre-load on the tappets. at a 24 thread that's roughly .010 - .012
Last edited by Roughbird72; 12/08/19 02:17 PM.
72 Plymouth Roadrunner 11.08@123.25
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Re: issues with fresh 440
[Re: stinger]
#2722582
12/08/19 05:00 PM
12/08/19 05:00 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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#6 exhaust lifter face is slightly concave but no marks on it. Let’s see a pic....... but....... it’s done. What starts out as slightly concave becomes:
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: issues with fresh 440
[Re: lewtot184]
#2722596
12/08/19 05:53 PM
12/08/19 05:53 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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I’ll add that if the cam being used is a Purple Plus 509 cam, those use .904 lifter diameter lobes. Sometimes the factory lifter bore positioning is such that a .904 specific lobe has the profile running off the edge of the lifter.
“If it were me”, I would use a cam that had a lobe profile that didn’t require .904 lifters.
Assuming the PP509 was a good match for the overall combo, something like a 21-314-4 would provide for a similar powerband and “character”, but doesn’t require the .904 lifter. You’d possibly be giving up a few ponies.
An Isky 292 Mega-cam would be another option, along with the Howard’s Big Daddy Rattler.
All of those recommendations assume you’re running headers.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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