Choppy Cam - Chevelle Tech
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post #1 of 11 (permalink) Old Dec 12th, 18, 9:24 PM Thread Starter
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Albert
 
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Choppy Cam

Got another project in the works. 454 .030 over etc.. This for a friend of mines nova. He wants a mean sounding choppy camshaft. Nothing too crazy What would you guys recommend? I would like to stick with Howards or comp cams but any suggestion would be great. btw the other project came along great. the car performs better in the street. and I have brakes now. Thanks for the help.

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post #2 of 11 (permalink) Old Dec 13th, 18, 12:27 AM
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Re: Choppy Cam

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Originally Posted by 67camaro69 View Post
Got another project in the works. 454 .030 over etc.. This for a friend of mines nova. He wants a mean sounding choppy camshaft. Nothing too crazy What would you guys recommend? I would like to stick with Howards or comp cams but any suggestion would be great. btw the other project came along great. the car performs better in the street. and I have brakes now. Thanks for the help.
Howards Cams, Hydraulic Flat Tappet Camshaft, Chev BB Mark IV 396-502, 237/[email protected] .050, .553/.553, 110 LS - Competition Products

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post #3 of 11 (permalink) Old Dec 13th, 18, 6:34 AM
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Geoff
 
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Re: Choppy Cam

The Comp Mutha Thumper cams are another option.
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post #4 of 11 (permalink) Old Dec 13th, 18, 6:55 AM
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Re: Choppy Cam

Compression, gears, head config, useage, etc would be required information for a proper fit. For a wild azz guess any cam with a tight LSA will give some lope. Why not look at the Clay Smith cam designed for oem BBC heads: BBC 454 to 470 CID ?Old School? OEM 049/781 heads to a max of 5700 RPM - Clay Smith Cams
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post #5 of 11 (permalink) Old Dec 13th, 18, 8:17 AM
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Jeff
 
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Re: Choppy Cam

I would use the better street performing, smooth camshaft and rig a solenoid to the vacuum advance, flip the switch when you want a lope..
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post #6 of 11 (permalink) Old Dec 13th, 18, 8:46 AM
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Re: Choppy Cam

Quote:
Originally Posted by 67camaro69 View Post
Got another project in the works. 454 .030 over etc.. This for a friend of mines nova. He wants a mean sounding choppy camshaft. Nothing too crazy What would you guys recommend? I would like to stick with Howards or comp cams but any suggestion would be great. btw the other project came along great. the car performs better in the street. and I have brakes now. Thanks for the help.
Summit 238/[email protected] .540/.540 114 LSA will have the idle you seek and will perform very well.
A good friend of mine runs this cam in a 8.9:1 compression 454 and it runs mid/low 12's on 87 octane w/3.42 gear in a 4000+ lbs. w/driver 69 Chevelle


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post #7 of 11 (permalink) Old Dec 13th, 18, 9:17 AM
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Re: Choppy Cam

Call Eric at Howards and ask him. Comp has their Thumper cams also.

Make sure your friend knows that "sounds good" usually does not equal "runs good" on a mild street engine.
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post #8 of 11 (permalink) Old Dec 14th, 18, 5:37 AM Thread Starter
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Albert
 
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Re: Choppy Cam

Quote:
Originally Posted by 427L88 View Post
Compression, gears, head config, useage, etc would be required information for a proper fit. For a wild azz guess any cam with a tight LSA will give some lope. Why not look at the Clay Smith cam designed for oem BBC heads: BBC 454 to 470 CID ?Old School? OEM 049/781 heads to a max of 5700 RPM - Clay Smith Cams
Street, Weekend warrior., closed chamber heads will add stronger springs, Manual 4 speed,
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post #9 of 11 (permalink) Old Dec 14th, 18, 12:09 PM
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Re: Choppy Cam

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Originally Posted by hydro462 View Post
I would use the better street performing, smooth camshaft and rig a solenoid to the vacuum advance, flip the switch when you want a lope..
This. Pick the right cam that matches Compression, Heads, Gearing, etc and don't choose a cam on sound. A car that runs well is much more fun than a car that only sounds like it runs well.
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post #10 of 11 (permalink) Old Dec 15th, 18, 1:43 AM
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Re: Choppy Cam

THumpr are poser cams, for stock low compression motors.
Plenty of cams that work that give good sound why waste his money?
Heck, the old Isky Mega cams work great, are cheap, sound great and pull hard. Wont go flat either

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post #11 of 11 (permalink) Old Dec 17th, 18, 8:15 AM
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Re: Choppy Cam

The old Isky MegaCams are cut on a nice tight LSA ( lobe separation angle) as well. Between the cc heads and the tight LSA, it should have really good mid range pull. The Summit cams mentioned are use widely as well. Here are four cams fromt eh Summit catalog. I would choose the smaller grinds unless the engine is over 10:1, but any would work.

https://www.summitracing.com/parts/isk-396281

https://www.summitracing.com/parts/isk-396271

and in the Summit line: https://www.summitracing.com/parts/sum-1302
and the one mr4speed mentioned: https://www.summitracing.com/parts/sum-1303

And while I've never done the solenoid thing, I can;t see why the complexity of a solenoid is required when you can set the idle circuit "incorrectly" to lope rather easily.

And while many here consider the Thumpr's as posers cams, ( well it is a marketing schtick), they run rather well due to the crappy exhaust port of BBC heads, esp those old CC heads. I dont prefer them as there is no lift, but you get that overly choppy sound. This is the only one I;d recommend:
11-601-4 - Thumpr? Hydraulic Flat Tappet Camshafts

and my favorite street BBC cam from COMP I've NEVER run ( an academic recomemndation!) : XS274. 11-677-4 - XTREME Energy? Mechanical Flat Tappet Camshafts

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