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Author Topic: help me pick a camshaft  (Read 302 times)
1971scamp383
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help me pick a camshaft
« on: March 30, 2008, 07:15:18 PM »

 ???ok....now that ive made a ash tray leg out of my edelbrock camshaft 7194(which turn out real good lol) i need a new one....can you guys help me out with this....and also how much compression would you suggest me to put in my engine....i can deal with ''cr ''by milling the heads...i ve checked the clearance and i have enough to mill....ive made the math and now with the 440source aluminium heads(84cc) and fel pros...i have about 10.1cr here is my build ...please suggest a CAMSHAFT and how much COMPRESSION would you put in it...i know its pretty hard to tell but i just dont want to do any other mistake like the edel cam!!!dont have much money to throw by the window!!!so here is it....1968 monaco 500 convertible(about 4200lbs with me in it ..i know...i know....its HEAVY but i just love the car)....383 .030 over...stock forged crank polish and new bearing....edelbrock double roller timming chain...edelbrock torquer aluminium intake.....edelbrock 750 cfm performer series....full length hedman headers 1 7/8 ..3'' out....440source aluminium heads(2.14 1.81 valves to be milled???) ....keith black dome pistons..(6cc dome)...10.1cr right now.....2500 torque stall(stall at 2900 rpm)...freshly rebuilt 727 with b&m transkit(shift kit)...3.91 rear gear with locker lock right....dont want a drag car but just want to have a little bit more pull than last year(all stock and tired 383 2bbl single exhaust..2.76 open)and also something to do little burnout for fun!!!!! thanks a lot
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on the build....1971 plymouth scamp 383...
illfish
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Re: help me pick a camshaft
« Reply #1 on: March 30, 2008, 07:22:46 PM »

I don't think you'll need a lot of lift or duration.  Probably something in the low .500's with about 225-230 duration @.050.  You'll need the extra torque down low to get that pig rollin'
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400duster
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Re: help me pick a camshaft
« Reply #2 on: March 30, 2008, 07:59:06 PM »

Comp ams XE 274, it is a little strong on duration with your weight,but you have 10-1 cr and stall and 3.91 gears. This cam will run like a scalded cat with that combo. It also has a nice lumpy idle to it. It is a hyrdaulic and can use stock rockers and is a no brainer to change. 
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rebel
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Re: help me pick a camshaft
« Reply #3 on: March 31, 2008, 04:01:27 AM »

i'm with illfish, i wouldn't max out on a cam any more than 230@50 & wouldn't squeeze it any more than 10.1 at the absolute max. you need torque to get your aircraft carrier moving not high winding HP.
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1971scamp383
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Re: help me pick a camshaft
« Reply #4 on: March 31, 2008, 01:06:57 PM »

what do you guys think of comp cams 274h...

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,800-6,000
Intake Duration at 050 inch Lift: 230
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Intake Duration: 274
Advertised Exhaust Duration: 286
Advertised Duration: 274 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.488 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.491 in.
Valve Lift with Factory Rocker Arm Ratio: 0.488 int./0.491 exh. lift
Lobe Separation (degrees): 110
Camshaft Gear Attachment: 1-bolt
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Grind Number: CRB XE274H-10

OR  comp cams 280h

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 2,500-5,800
Intake Duration at 050 inch Lift: 231
Exhaust Duration at 050 inch Lift: 231
Duration at 050 inch Lift: 231 int./231 exh.
Advertised Intake Duration: 280
Advertised Exhaust Duration: 280
Advertised Duration: 280 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.480 int./0.480 exh. lift
Lobe Separation (degrees): 110
Camshaft Gear Attachment: 1-bolt
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Grind Number: CRB 280H-10

i want to have a rough idle and i have power ster and brake!!!what do you think about it???
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on the build....1971 plymouth scamp 383...
satellite65
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Re: help me pick a camshaft
« Reply #5 on: March 31, 2008, 02:07:24 PM »

I'd go for the XE274. It's a more modern grind with a wider powerband, less duration and less valve overlap. It'll give you more vacuum for your power brakes and more low end torque to get that yacht movin'.
I'm going with the XE262 myself. Mine's a B body, 3800 lbs. w/ 3.54 gear and stock converter. Looking for a nice running street engine that can PULL away from traffic lights in a hurry and idle without overheating or fouling plugs.
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IL.DART340- 4SP
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Re: help me pick a camshaft
« Reply #6 on: March 31, 2008, 02:48:18 PM »

IMO Comps. XE268H I think it would be good for the stall and 3.91 gears you are using. The rpm range is better (1600 -5800) then the XE274 and the XE268 has a more suitable duration 224-230 @.050 The choice is yours both would work fine.
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satellite65
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Re: help me pick a camshaft
« Reply #7 on: March 31, 2008, 03:13:07 PM »

 agree Bigger isn't always better. The combo has to work well together. A '68 Monaco's got a LOT of heft. It's never going to be a dragstrip bruiser so you may as well let torque do it's job and have some fun 4 speed
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JOEYMAN
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Re: help me pick a camshaft
« Reply #8 on: March 31, 2008, 03:53:53 PM »

You can't go wrong with a RACER BROWN. give them a try
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1971scamp383
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Re: help me pick a camshaft
« Reply #9 on: March 31, 2008, 04:10:00 PM »

i really dont want a 12 sec car!!!but you know last year with that car i run 10.70 on 1/8 miles about 15.90 on 1/4 miles.....and it was running pretty strong!! imo (all stock and really tired 383 2bbl 2.76 rear open nothing modified)so with my new combo.. im thinking of maybe 9.50 on 1/8 miles about 14.50 on 1/4 miles ..so...really not a drag car...just want to have fun and impress some people that think than that boeing cant do burnout... i know this car is damn heavy...but i saw some(heavy) 80's full size pick up with 350 chevy(crap...(my opinion)) doing real good on the strip..... thank you
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on the build....1971 plymouth scamp 383...
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