500 STROKER DETUNING FOR STREET/ SPECS AND ?
#1179008
02/15/12 08:36 PM
02/15/12 08:36 PM
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Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
RUMBLON
OP
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OP
master
Joined: Jan 2003
Posts: 9,857
Cambridge Idaho
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OK, some on here replied to my original post about rebuilding my 383 out of my 63 Polara 500 vert. I then decided to detune a 500 stroker that I have never used for a drag cuda that I have since sold as I wont be racing due to time and recent events in my life. That said I have a 500 stroker sitting here that should have originally been at over 600HP. I now want to detune it in order to use it on the street. I found the cam card and some specs and want opinions. My engine builder had me find the paperwork so he knew what direction to go, but had previously stated a new cam, springs and dueal plane manifold? He also stated that (MAYBE) I should just sell the race engine and build two good driving engines for the street.  In any case, I am no engine builder and am looking for ideas. I just want to build a reliable vert driver that has some decent HP. My builder has given me both advise on a different solid lifter cam and hydraulic? what do you think is best. Here is what it is and some of the guts. 500 STROKER. EDDY HEADS. T&D COMPETITION ROCKERS 440 SOURCE STROKER KIT/ belive it was 10.5.1 BALANCED. CAM IS ERSON CAM CARD SAYS THE FOLLOWING ON FRONT PAGE BDC 37 INTAKE OPENS 78 OVERLAP 41EXHAUST CLOSES 77 INTAKE CLOSES 81 EXHAUST OPENS INTAKE .032 VALVE LIFT .675 DEGREES OF DURATION 294 EXHAUST 0.32 VALVE LIFT .645 DEGREES OF DURATION 302. PAGE #2 TDC 24 INTAKE OPENS 52 OVERLAP 28 EXHAUST CLOSES BDC 64 INTAKE CLOSES 68 EXHAUST OPENS INTAKE .450 DEGREES OD DUR 268 EXHAUST .430 DEGREE OF DUR 276
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: RUMBLON]
#1179012
02/16/12 04:08 AM
02/16/12 04:08 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
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I Win
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Posts: 43,157
Bend,OR USA
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Is the current camshaft a solid roller lifter, solid flat tappet lifter or ? I'm thinking the duration at .050 is where your showing the bottom two lines: Intake .450 degrees dur 268, Exhaust .430 degree of dur 276. What I'm saying is the duration at .050 is 268 on the intake and 276 duration on the exhaust. that is a fairly big cam, I run one in my pump gas street stroker motor(518 C.I.) that has a little les duraton at .050  My motor made over 650 HP with Eddy RPM heads on it and over 725 HP with a set of Indy SR M.W. heads on it with a single 1050 CFM Dominator carb on Oegon 91 octane pump gas  I have several other motors with Comp Cams XE---HL grind hydraulic cams in them, I would probally use the XE285HL grind in your motor  
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: Cab_Burge]
#1179013
02/16/12 10:43 AM
02/16/12 10:43 AM
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Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
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As long as you didn't build it with some trick low tension ring package I would just pick a flat tappet cam that suited the intended use and go. A single plane on a 500 cube engine won't be a deal breaker on the street. My 9:1 493 makes over 500 ft/lbs from 2000 to 5000 with a peak of 600ft/lbs@4000rpm. I'm running an MP509 108 LSA hyd cam and an M1 single plane.
Kevin
Last edited by Twostick; 02/16/12 10:45 AM.
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: Cab_Burge]
#1179014
02/16/12 02:17 PM
02/16/12 02:17 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
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Ontario, Canada
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Quote:
Is the current camshaft a solid roller lifter, solid flat tappet lifter or ? I'm thinking the duration at .050 is where your sh Cams XE---HL grind hydraulic cams in them, I would probally use the XE285HL grind in your motor
10.5 to 1 with aluminum heads is already in 89 octane area.
241 intake duration on a 500 inch engine will be mild like a 230 duration cam on a 440 inch so that and the corresponding valve springs with a nice 800 to 1000 holley with power valve in the 6.5 to 7.5 area should be all you need.
Even a nice 3310 holley with vacuum secondaries will work nice!
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: Darryls-Demon]
#1179015
02/16/12 09:24 PM
02/16/12 09:24 PM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Quote:
I would just put a smaller cam in it, just keep an eye on the cylinder pressure.
My 440 has 170lbs of cylinder pressure and if I get some bad gas it will rattle and my motor has a tight quench(.030)
I would try the single plane intake with that big of a motor.
Depending on how stock you want to get. If you put a small enough cam w/ a tight LSA you could have detonation. But even a near stock cam with a wide LSA would probably work very well. And if you wanted to put a dual plane intake on, it would work fine too, but you might be leaving some power on the table.
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: demon]
#1179017
02/17/12 12:08 AM
02/17/12 12:08 AM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
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master
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Posts: 7,664
IN
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For the OP, agree as several have posted, a suitable cam in the range of 240 intake duration @.050" should make it a good street engine. With 500" you should have plenty of torque with either a SP or DP intake. No real need to change it. The CR may be a touch on the high side so avoid a tight LSA cam and give it a gentle timing curve if needed. For Demon, a cam in the similar range of intake duration or a bit less shoule do it. There are some good posts in the archives by Andy F on cams for manifold applications... have a look. I believe the ".525" MOPAR mechanical flat tappet works quite well in this application. Link to archives: http://www.moparts.org/Tech/Archive/bb/Lobe.html
Last edited by ahy; 02/17/12 12:45 AM.
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: demon]
#1179019
02/17/12 12:50 AM
02/17/12 12:50 AM
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Joined: Jan 2008
Posts: 795
Glendale Az
Darryls-Demon
super stock
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super stock
Joined: Jan 2008
Posts: 795
Glendale Az
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Quote:
I too have a similar question.
I'm planning to build a 500 inch 400 stroker using 440 Source kit,
and their aluminum heads. In a B body automatic with 3.23 or
even 2.94 gears. Planning to keep stock Hi Flo manifolds on it too.
Any cam And intake suggestions? It will have power brakes.
Just want a really strong street performer that is easy to drive but goes like mad when stomped on.
If you are going to use HP manifolds I would call Dwyane Porter and have him spec out a custom grind
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: demon]
#1179020
02/17/12 02:23 AM
02/17/12 02:23 AM
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Joined: Jan 2003
Posts: 75,004
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,004
U.S.S.A.
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Quote:
Just want a really strong street performer that is easy to drive but goes like mad when stomped on.
That is what everyone wants , problem is you can't always have everything .
Contact member fast68plymouth and talk to him , he is good at specing cams for what you are trying to achieve.
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: demon]
#1179022
02/17/12 10:12 AM
02/17/12 10:12 AM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Russ "DaBeast2" runs a 512 10.5 to 1 Indy EZ heads with a 230/236 custom solid 110 LSA which should give him 193 to 196 cranking 9.43 dynamic compression he runs a 3.54 dana with a gear vender overdrive and a 2000 stall it's just idling at 80 mph. (maybe 2400?) anyway fun to drive and he has run 11.7's through the exhaust on sticker streets. it runs on 93 
Last edited by Dodgem; 02/17/12 10:13 AM.
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Re: 500 STROKER DETUNING FOR STREET/ SPECS AND ?
[Re: Kam*Kuda]
#1179024
02/18/12 12:45 AM
02/18/12 12:45 AM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Think about this: The largest production engine in an American car was the cadillac 500. It ran just fine with a small cam and Quadrajet.
You have decent compression and the aluminum heads, I believe you need a smaller cam like the Comp XE275HL and matching lifters and springs. That's all.
For an intake any intake that fits under the hood will be OK. I'd use something like a Torker 440 and a Holley 3310 750 cfm.
Back in the day like 1974 there was a favorite Hot Rod article "440 to 514 for $750". The guy ended up running it on the street with a Holley 6619, that's a 600 vac secondary. He might have been running an SSH-25 racer brown, just to illustrate how old that cam is. Shoot, the MP 509 cam would work in that engine on the street, there's probably a dozen of them floating around.
R.
Last edited by dogdays; 02/18/12 12:56 AM.
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