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Old 03-25-2012, 09:06 PM   #1
dirt runner
 
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Default 383 circle track engine-cylinder head 200 or 215

383, 6" rod, 13.8 cr, 546/548 lift - comp cam (hydraulic), aluminum intake, 500 Holley carb, currently running 200 runners with the 64cc chambers (ported), I would like more hp, will the 215's benefit me at all? the rpm on the track it runs are 3800 to 6000 when racing.
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Old 03-26-2012, 01:58 AM   #2
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The 215s will not gain you want you want. Give the engine more compression, and if not done so add 1.6 rockers on the intake. What is the weight of the car?
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Old 03-26-2012, 01:29 PM   #3
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rockers are now 1.5, what will the 1.6 rockers result in performance? car's weight is 3048 lb's
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Old 03-26-2012, 07:26 PM   #4
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The 1.6 rockers will help accelerate the valve lift and help build cylinder pressure faster. Are you sure your at 13.8:1 compression? Did you blueprint anything to verify? What intake are you using?
And what is the duration @50 of your camshaft and lobe separation. What 4412 500cfm are you using. There are a bunch of things that can change the way these engine perform.
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Old 03-26-2012, 09:35 PM   #5
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The pistons are Mahle #SBC125040D11, the carb is re-worked by Willy's to pass gauge tech, the intake is a Edelbrock Victor 2V #2901, Comp Cam; 549 intake, 544 exh, duration .006 tappet lift 291/302, Lobe separation 106.0, duration @ .050 248/253, 1 5/8 tube headers Schoefield with 3" exhaust
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Old 03-26-2012, 10:32 PM   #6
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You have plenty of camshaft to run 7200, as for those pistons, if your heads are 64cc and your pistons are .010 in the hole, your at 13.21:1 give or take for head gasket used. if your looking for more low end power, advance the camshaft, if your looking for more over all power, mill the heads down and add some more compression. I would also add some more gear and crank it 7000.
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Old 04-04-2012, 12:04 AM   #7
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Quote:
Originally Posted by dirt runner View Post
383, 6" rod, 13.8 cr, 546/548 lift - comp cam (hydraulic), aluminum intake, 500 Holley carb, currently running 200 runners with the 64cc chambers (ported), I would like more hp, will the 215's benefit me at all? the rpm on the track it runs are 3800 to 6000 when racing.
What track? Size and conditions can play a big part also.
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Old 04-08-2012, 07:12 PM   #8
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Quote:
Originally Posted by CNC-MOTORSPORTS View Post
The 215s will not gain you want you want. Give the engine more compression, and if not done so add 1.6 rockers on the intake. What is the weight of the car?
Make sure you have enough piston to valve lift clearance to clear the extra lift.

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Old 04-14-2012, 09:05 PM   #9
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Smile pro1 alum heads

i have 383 with 11.1 compression solid lifter comp cam . 555 lift 306 duration it has the double hump 461 fuelie heads with 202 and 1.6 valves, 750 holly with edelbrock victor jr ibought a pair of dart pro 1, 200 cc heads the car runs 7.50 in the 1/8th mile will these heads lower my et ?
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