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304 on the dyno |
Post Reply | Page 123 7> |
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jan/11/2019 at 1:46pm |
304 build on the dyno.
3.800 bore, 3.44 stroke, 312 CID, 9.72 compression, ported iron heads with 1.84/1.5 valves, LS 1.7 ratio mini shaft rockers, Molnar rods, Racetec pistons, 5cc flat top two valve reliefs, .040 quench with 3.810 bore, .040 thick Cometic MLS gaskets, air gap intake, factory appearing deep oil pan, Doug's 1 7/8 headers, Quick fuel brawler 600 CFM mechanical secondary carb, billet MSD type ignition Best pull, 381.8 TQ @ 3600, 363.3 HP @ 5500 |
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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
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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More pictures,
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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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1982AMCConcord
AMC Addicted Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1287 |
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Wow! Now that is more than respectable!!!!!!!!!!! Good work!!!!!!!!!!!!!!!!!!!!!! This 304 would be a lot of fun!!!!!!!!!!!!!
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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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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JolleyGreenSST
AMC Apprentice Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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Great job! My only questions are for such a low rpm range why the need for Molnar rods? And why again did the dyno run end at 5500rpm?
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"God is good all the time and all the time God is good!"
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shootist
AMC Addicted Joined: May/24/2012 Location: Triad, NC Status: Offline Points: 1023 |
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Now that is pretty impressive numbers for a little ole 304 AMC motor.
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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I use Molnar rods in everything. For a little extra money it does not make sense not to. It was starting to nose over so that is where he pulled it to. It will pull strong to 6K no 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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EVF_Sportabout
AMC Apprentice Joined: Oct/04/2018 Location: Colorado Status: Offline Points: 199 |
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What I can't get over is how high and flat that torque curve is it hits 350 @ about 2900 and just stays up there all the way through. We had one pull where it hit 381.8 @ 3600 RPM. Its going to be a fun driving Sportabout yes its going in a wagon!
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jpnjim
AMC Addicted Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Sweet parts combination! That Air Gap was born to sit on a set of ported 304 heads like that, it sounds amazing on the dyno and ought to RIP in a Hornet Wagon! Nicely done John edit, couple questions, did you leave the intake divider intact on this build? did you happen try a pull with an open carb spacer? That 600 Double pumper is probably the perfect match for this engine, just curious if it left any power on the table at the very top (especially if the full divider is intact). Edited by jpnjim - Jan/11/2019 at 6:10pm |
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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Buzzman72
AMC Addicted Joined: Sep/15/2009 Location: Southern IN Status: Offline Points: 2725 |
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After seeing these numbers, can we all stop telling newbies with a 304 to use it for a boat anchor and get a 360 instead?
Some of us love seeing what can be done with small cubic inch naturally aspirated engines.
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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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