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Intake/camshaft |
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70,71,72 AMXS 
AMC Nut 
Joined: Oct/01/2008 Location: Ohio Status: Offline Points: 341 |
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 Posted: Sep/22/2021 at 6:00am |
What he said.....
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Bruce in NW Ohio
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Buzzman72
AMC Addicted
Joined: Sep/15/2009 Location: Southern IN Status: Offline Points: 2725 |
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Posted: Sep/22/2021 at 6:33am |
With 1.7:1 rockers, such as the LS conversion, your valve lift goes to .550" I/.579 E. That's a crapload of valve lift on a street engine. You don't want pistons and valves shaking hands here. So clearance becomes one more concern. BUT... I do like the thought process behind this! |
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Buzzman72...void where prohibited, your mileage may vary, objects in mirror may be closer than they appear, and alcohol may intensify any side effects.
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Heavy 488
AMC Addicted
Joined: Apr/27/2019 Location: In the Status: Offline Points: 3557 |
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Posted: Sep/22/2021 at 7:11am |
Nice insult to Rick. Should just build it himself. Then no one to blame but himself
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n2ojoe
AMC Addicted
Joined: May/04/2016 Location: Tecumseh, MI Status: Offline Points: 717 |
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Posted: Sep/22/2021 at 7:34am |
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Rick is one of the best and knows his stuff. Do you have any idea how many engines he has turned away this year alone? For someone that busy, I'd be extremely grateful that he even offered to help, and trusting of his advice. Let him do things his way, he doesn't need any input from the internet. You won't be sorry.
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amxdreamer
AMC Addicted
Joined: Jul/30/2008 Location: Vancouver, BC Status: Offline Points: 8511 |
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Posted: Sep/22/2021 at 11:33am |
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^^^^^^^X 1,000,000^^^^^^^^
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Tony
Vancouver, BC 1970 AMX 1972 Badassador AMO#10333 |
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jcisworthy
AMC Addicted
Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Sep/22/2021 at 12:29pm |
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Insult to Rick? He said Rick is building the engine so whats the problem?
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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Sonic Silver
Supporter of TheAMCForum 
Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7969 |
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Posted: Sep/22/2021 at 1:24pm |
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I didn't see it as an insult at all, just a suggestion to ask the man in charge.
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Repsolroger
AMC Nut
Joined: Aug/23/2021 Location: washington Status: Offline Points: 376 |
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Posted: Sep/22/2021 at 2:30pm |
And im blessed to have rick take on this project for me.. and we have chatted ( love his accent hahah ) can tell hes a totally cool guy. but ive really liked checking out those links.....but its up to DR Rick to tell me what i REALLY need to order.
Edited by Repsolroger - Sep/22/2021 at 2:32pm |
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1969 sst javelin restomod
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mbwicz
Supporter of TheAMCForum
Joined: Feb/20/2019 Location: Buffalo, NY Status: Offline Points: 2001 |
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Posted: Sep/22/2021 at 3:45pm |
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For my 1970 390 with e-heads and edelbrock Efi kit. Bullet recommended a 232/238/112 hyd roller. My car is a 4 speed and has power brakes. I’m months away from having it running, so I can’t confirm if this is a good combo or not.
I’m sure Rick will give you some great advice. Mike |
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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Trader
AMC Addicted
Joined: May/15/2018 Location: Ontario Status: Offline Points: 6910 |
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Posted: Sep/22/2021 at 5:40pm |
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Actually looking at the Herbert cam again with a 1.6 ratio rocker, looks quite good. 0.533, intake lift, 0.550 exhaust, 1.1 to 1.0 exhaust to intake ratio which would be better the other way with an AMC.
But off the shelf with an intake closing 38 ABDC and the exhaust opening 49 BBDC. It's not bad at all in my opinion. VG intake charge and power to exhaust open points. Small amount of EGR effect will up cylinder pressure slightly for slightly more HP. Have a play: Look what happens if you reverse the intake and exhaust durations. A real nice AMC cam. It should make 570 to 580 HP with the intake and heads as is. Moving to a 1.5 exhaust ratio will not have any significant effect on HP - on paper!
Edited by Trader - Sep/22/2021 at 5:42pm |
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jcisworthy wrote: