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68 390 heading for the dyno soon |
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jcisworthy 
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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 Posted: May/22/2018 at 6:53pm |
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Real happy with the oil pan also. Holds 7 qts with the filter
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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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67 Marlin
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Joined: Feb/21/2015 Location: Minnesota Status: Offline Points: 877 |
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Posted: May/22/2018 at 10:00pm |
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Is that capable of 87 octane? If so, that's a lot of snoose for pump gas
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jcisworthy
AMC Addicted
Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: May/23/2018 at 12:44pm |
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I think it will run on 87 but I am using 91 on the dyno
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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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SONOFAMX
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Joined: Aug/08/2007 Location: Indiana Status: Offline Points: 226 |
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Posted: May/23/2018 at 12:49pm |
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Wow that's incredible
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Did you mean GMC?
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PHAT69AMX
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Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Posted: May/23/2018 at 1:54pm |
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May I ask, back there a couple post it says:
"401 Wiseco 27cc dish pistons and Molnar 5.858" rods. Pistons are .050 out of hole with Felpro .045 compressed gaskets"... where I would imagine it is pistons are .005" out of the hole ? I am NOT "picking", I am just asking, and may I ask the Cam Overlap at .005 and .050 ? Lotta "other brand" fellas I know would & have refuse to believe me if & when told about AMC HP... Look forward to once water tight seeing 500 / 500 ! on pump gas and 9:1 CR, Thanks, awesome !
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jpnjim
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Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Posted: May/23/2018 at 2:44pm |
I think John was figuring 450-475 & 500, I liked the way 500/500 sounded better, but I'm not sure he's setting the bar exactly there. (I didn't mean to put the pressure for 25-50 more ponies on him with my 500/500 post  ).I would think it's .005" too, if that's the case I like the way the 401 pistons & long rods fit the short deck 390's!
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: May/23/2018 at 5:15pm |
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It is .005" out of the hole for .040" quench
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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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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jul/03/2018 at 1:10pm |
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Ran the 390 on the dyno today with a fresh set of heads. Very hot here today, 90 degrees and 70% humidity
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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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74Bubblefender
AMC Addicted
Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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Posted: Jul/03/2018 at 1:22pm |
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John what happened at 1:07. Looks like it went to full throttle but the engine slowly crept up. Did you loose fuel pressure during the test? Did you see your fuel pressure?
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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jcisworthy
AMC Addicted
Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jul/03/2018 at 1:31pm |
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1.07?
Not sure what you mean. Fuel pressure was 6.8-7 PSI
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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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PHAT69AMX wrote: