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#1
02-19-2009, 07:04 PM
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the right camshift
hi i m new to this site and would be greatful for any help i m rebuilding a 340 that was reworked in the past it in a73 dart with a 727 and 3000 stall a 4;88 gear with 27'tall tire. the eng has adijustable rockers ,single plain intake and 750 vac. holley carb. i like to know what cam i should run with this set up? the car is mostly use as a e.t. racer thank again for any help
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#2
02-19-2009, 08:13 PM
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Anything solid with .250" + @ .050 LOL....
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#4
02-20-2009, 12:57 AM
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what kind of compression??
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#5
02-21-2009, 10:32 AM
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The opinion of the right cam is like going from country to country asking what kind of girl is right to marry. OMG! The opinions and varried answers that you'll get.
I have to ask, in what state are the heads? Lay me on a description of the heads in all there glory or lack thereoff. OH! Do you see any street time and do you care about how it is on the street?
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#6
02-24-2009, 10:58 PM
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what heads, pistons, valve clearance, compression, etc do you have?
You could run a big cam, but it may not fit without cutting the pistons for valve clearance, along with head issues like valve guide to retainer clearances, etc.
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#7
02-24-2009, 11:18 PM
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OK how about i throw my spec's out, while were waiting for redliner1967 to return.
360/408 stroker, Full ported J heads with 2.02 intake valve (should flow as good or better then a "as cast" Indy 360-1 or Eddy head) around 11.1 compression, single plain manifold(2545 Weiand)850 cfm Demon carb 3500 stall(727) 4.56(8-3/4) poss, in a 3800 pound car..............want to run High 12's 1/4 mile. Also, and i do this with a Hyd or will i need to step up to a solid lifter????? O ya this is a all race, don't car about the street on this one What say you
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#8
02-25-2009, 12:47 AM
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Quote:
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#9
02-25-2009, 01:32 AM
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Built an 11:1 360 with ported iron heads and the old 292/0.509" MP purple cam that ran 12's, but I prefer a slightly larger solid flat tappet or solid roller so you can run stiffer springs and get more RPM out of the engine.
A cam in the mid 240's @ 0.050 with at least 0.550" lift would be on the lower "torque" range, something right around 250 @ 0.050" and 0.600"+ would probbably be close to what you want in a heavy car with only a 3000-3500 stall converter. Check out something like the Hughes HTL4852AS Solid Flat Tappet cam with 248/252 @ 0.050", 0.600"/0.610" lift with 1.6:1 rocker ratio on 106 LSA installed at 103 degrees. Or the HTL5256AS - 252/256 0.610"/0.614" 106/103 A bigger cam could be used with more stall speed or a lighter car, but I like cams with a wide torque curve as they seem to run more consistent in my bracket car. What I mean is, if I shift 100 RPM to early or so the extra low end torque (at the lower RPM after the gear change) helps keep the car consistent.
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#10
02-25-2009, 01:51 AM
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Quote:
 O and it need to run high 12's at 4400 feet. Vary encouraging that you made a 360 /509 MPP cam in to the 12's What was the car weight????
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#11
02-25-2009, 07:04 PM
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I'm not sure of the cars weight, probbably 3200-3500?, but it had 4.10 gears and a 3500 stall converter. The car was a friends, not mine. I just help build the engine and port the heads.
Another friend of mine is winnging a '67 dart at bandimere and it is using a fuel injected magnum truck engine (pretty much stocl bottome eng and heads) and I think he swapped in the MP 292 cam also, and I think he has ran low 13's or even 12's. His car gets pretty good 60' times.
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#12
02-26-2009, 11:19 PM
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Low 13 at bandimere Hmmmm that really encouraging...........non stroker, 508/292 Hyd cam and at a higher altitude then me.
Well it lookes like my game plan is in the ball part.........But getting the set up (eng and chassis) right it Key. Thank!
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#13
02-27-2009, 01:54 AM
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I just looked on the Bandimere web page at last years Octover 4th 2008 Seniors race and Mikes Dart (car B242) dialed a 12.93, but he had a red light and only ran a 13.027 @ 103.42? I'm sure he probbably didn't push it hard because of the red light. Anyhow, his car runs really good with the magnum 360.
I'm not sure what stall and gears he is running, but I know he installed a spool in the rear axle, and he even drive the car on the street. If your really interested I could get more information for you.
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#14
02-27-2009, 11:27 AM
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Quote:
I have a friend with a 70 duster that broke into 11.98 from a 12 flat. Soooooo high 11's-low 12's
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#15
02-27-2009, 06:39 PM
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Quote:
any info you can get would be grate......Car weigh, gear ratio, how tall of drag slick, Converter stall speed.....904 or 727......Suspention......any of this would help......Thanks Once its built it cost a lot more to change you(My) mind
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