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#1
03-29-2015, 01:40 PM
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IA II blocks & Roller cam bearings
I'm currently upgrading an IA II block to roller (50 mm) cam bearings. I was wondering what others aware doing to insure adequate oiling to the timing chain area? It looks as if the factory design (hole in the retainer plate) will not provide much oiling to this area. Is mist/splash enough, or are you drilling a small hole in one of the front galley plugs? Thanks, Bill--
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GT37 3625lbs..Fastest bench seat, column shift, all steel,no power adders car at Norwalk 1.35 w/29.5x10.5x15 6.42 @ 109 10.09 @ 133 |
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#2
03-30-2015, 08:22 AM
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I didn't build my current IAII so can't answer your question directly. I asked about lube for rollers.
I was told it was mist & splash as cam oil passages are blocked. To me it must now put more oil up top. My reason is because I started having oil catch tank overflow. Never had problem before conversion ? I've installed a differnt system but haven't been out yet. Not sure extra oil up top would help chain? Got to drain to pan as cam tunnel is solid in IAII. Just a thought
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 ECM member. 2008 Outlaw Pontiac Drag Series Champion MANDRA Do it now fool! Life is short. 69 Grand Prix/3163lbs / IAII 535 w/ Tiger heads by Gaydosh....9.35@ 144 so far..  through mufflers. 1.26 60'. Going back to track with pump gas engine.... My 60 Ventura retired to street/strip duty.. |
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#3
03-30-2015, 08:57 AM
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BOP belt drive
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1989 Automotive Hall of Fame Inductee |
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#4
03-30-2015, 12:12 PM
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I run a 50mm needle bearing setup in my current engine with a Sims modified timing chain setup and we did nothing else. On my third season so far and no issues. There is oil that drains down from the valley along with the mist/splash in the front cover.
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Jim 71 Firebird, best 1/8th mile time of 5.02 at 142 at altitude in Vegas |
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#5
03-31-2015, 03:49 AM
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I'm guessing you won't be driving a mechanical fuel pump? That leaves just the timing chain, which again I guess is roller chain? Roller chains require very little lube; very, very few motorcycles even enclosed their drive chains.
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
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#6
03-31-2015, 09:39 AM
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I don't run a mechanical fuel pump and use a Simms TC set up. I didn't have roller cam bearings in previous combo but chain & gears were fine .
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ECM member. 2008 Outlaw Pontiac Drag Series Champion MANDRA Do it now fool! Life is short. 69 Grand Prix/3163lbs / IAII 535 w/ Tiger heads by Gaydosh....9.35@ 144 so far.. through mufflers. 1.26 60'. Going back to track with pump gas engine.... My 60 Ventura retired to street/strip duty.. |
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#7
03-31-2015, 10:52 AM
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Call Wade at BOP
Hi Bill,
Call Wade at BOP Engineering, he has a solution for the NR cam bearing plugging the oil hole with or without using the belt drive. |
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#8
04-04-2015, 12:03 PM
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Before I put my front bearing in I used a small file and cut a very small grove from the oil hole to the cam plate just on the front side to let a small amount or oil to get in that area.
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Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
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#9
04-04-2015, 02:41 PM
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install 55mm regular bearings and go ahead on....
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 1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
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#10
04-04-2015, 03:22 PM
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Thanks for all the replies. I put a .030 hole in the passenger side oil galley plug. It hits the back of the timing gear and I figured it would give enough splash to take care of the thrust on the cam sprocket. If I were to do it again, I would take a close look at what chiefbig b suggested. Thanks again, Bill---
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GT37 3625lbs..Fastest bench seat, column shift, all steel,no power adders car at Norwalk 1.35 w/29.5x10.5x15 6.42 @ 109 10.09 @ 133 |
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