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AMC390 build with Hyd Roller & Edel. Heads |
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mbwicz
Supporter of TheAMCForum Joined: Feb/20/2019 Location: Buffalo, NY Status: Offline Points: 1980 |
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Alfano Performance has a kit with a cam retainer plate and a roller thrust bearing. It includes a modified timing chain set to make the whole thing work
That is what I used on my 390 with a bullet hyd roller. Mike |
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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Repsolroger
AMC Nut Joined: Aug/23/2021 Location: washington Status: Offline Points: 367 |
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roller cams are way to go :-) well i think so .. you can get more aggressive
profiles
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1969 sst javelin restomod
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Gench
AMC Apprentice Joined: Oct/09/2021 Location: Boulder CO ish Status: Offline Points: 182 |
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That is the kit I plan to order, guess I better get to it!
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Gench
AMC Apprentice Joined: Oct/09/2021 Location: Boulder CO ish Status: Offline Points: 182 |
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This is your motor? Bullet proof build it would seem. Roller cams certainly seem to be a big miss if skipped in many ways. The profiles, oil, friction, break-in… everything sounds great but the cost. Hoping to only do it once so off we go. If this is your bad boy I hope to hear it run on that Pro Flo.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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I think I had the pistons made with .300 valve reliefs but I was assuming a .650" valve lift max. The cam bolt holds the distributor gear and fuel pump accentric on to the cam. That is it's only purpose. Nothing to do with oil. AMC cam bearings are all machined at different diameters starting with the largest in front digressing to the smallest in back for two reasons. A -you can insert the cam in with no problem and B so that that the cam will naturally want to walk backward towards the block. It is when you let off on the load (rpm etc.) that it is in the free state and may or may not try to walk forward. This is when when and if the timing chain is loose or wore out it might Jump. So to keep the cam from walking forward we have to come up with a method to hold it against the block. There are a couple of options but I chose to limit the travel by shimming the clearance to the timing cover to less than .010" via washers as a shim.
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Gench
AMC Apprentice Joined: Oct/09/2021 Location: Boulder CO ish Status: Offline Points: 182 |
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Thanks for explaining.
If that was done on none-roller cams it would more than likely save a lot of distributor gears.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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It doesn't hurt but there are other reasons that we have distributor gear failures. From the '60's through the '80's we put over 100,000 miles on multiple AMC and AMC/Jeep vehicles with nearly zero distributor gear failures. It wasn't until they change the oil recipe and came out with after market gears and timing covers that we started having issues. I have seen timing sets so wore out that jumped time but the distributor gear was fine. Just my $0.02 worth.
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americanjackie2
AMC Apprentice Joined: Mar/01/2015 Location: wallace id Status: Offline Points: 110 |
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You build engines for other people? What ended up being the cost of this build?
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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I have been trying to retire. If someone is local or, if I have one in storage that I want to sell I will rebuild one. Costs change so fast that you would have to start with a clean slate to estimate the costs today.
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6754 |
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Cost change is to the point now that the shops will not quote anything but labor.
Parts will be added when they are done or down payment up front and they call when more cash is required. Camshafts have doubled, bearings tripled ... And if it has to be shipped - that's a total unknown except it's likely adding the price of the part again on top and just throw it away if the wrong part got shipped! Got a catalogue from Summit "free shipping to Canada on orders over $299", small print - duties, brokerage, taxes not included - recycled. Get a quote - good luck! Rant over. |
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