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12-27-2002, 12:10 PM
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#1 |
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Registered User
Join Date: Mar 2002
Location: jeffersonville, IN
Posts: 99
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new exhaust, camshaft is LOUD!
Long story short, built a motor 5yrs ago for 67 camaro. Sold camaro, kept motor, now in my 70GMC... Motor has solid cam, fairly wild, but runs good.
Truck HAD typical Indiana exhaust. Glasspacks and megaphones. Well yesterday, had new exhaust put on. From manifolds back. They did a GREAT job of tucking it up underneath. I think the mufflers (basically a flowmaster), are almost bolted to the bottom of the bed. Very clean. I don't like pipes, so I had turn down done at the back so you can't see them. Truck sounds good, now to figure out how to quiet down the solid lift cam. It is louder than the exhaust. Anybody found any good underhood insulation that cleans up ok, and will keep noise down?
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Jeff Scott '70 GMC Stepside, Short box '63 Nova '92 GMC typhoon '95 Tahoe |
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12-27-2002, 02:11 PM
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#2 |
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creator of kong
Join Date: Mar 2001
Location: Kentucky
Posts: 538
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I used a noisey gear drive to calm my cam noise down..........hehe......gotta love makin noise!!!!!!!
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12-27-2002, 05:53 PM
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#3 |
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Account Suspended
Join Date: Oct 2002
Location: Olathe, KS
Posts: 2,300
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^^ LOL
Dumb question... Valves adjusted correctly? I would think a insulation pad underneath the hood would do wonders. Something to absorb the sound waves. |
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12-27-2002, 06:00 PM
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#4 |
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Registered User
Join Date: Mar 2002
Location: jeffersonville, IN
Posts: 99
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Valves are adjusted. Just a noisy setup with solid lift cam, full roller rockers, girdles, etc, etc....
Does rev nice. when the engine builder turns to you on the first test drive of new motor and says "Don't take it past 7k rpm UNTIL it is broke in!" You know it is mean. I have been to 7 a few times, but not past it. No need. It does rev to 7 faster than any V8 I have seen though.
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Jeff Scott '70 GMC Stepside, Short box '63 Nova '92 GMC typhoon '95 Tahoe |
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12-27-2002, 06:02 PM
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#5 |
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Account Suspended
Join Date: Oct 2002
Location: Olathe, KS
Posts: 2,300
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Yep solid lifters are a bit "clattery". I wonder what Dynomat would do for it? Expensive but I dont know what it would do in the heat?
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12-27-2002, 09:24 PM
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#6 |
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440 american Horses
Join Date: Mar 2001
Location: Anoka, MN USA
Posts: 470
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dynomat does make a sheeting designed for under the hood. From my memory, it has a nice silver, foil covering. Looks like it'd be easy to clean.
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Seth Petro 1969 Chev Short Step 425hp 350, TH400, big tires, fast truck 1979 Pontiac Trans Am 1991 Saturn SL1 - gas mileage! (and free) 1977 Buick LeSabre - for sale May America bless God, and may God bless America 
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12-27-2002, 10:19 PM
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#7 |
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Registered User
Join Date: Apr 2001
Location: Detroit Lakes, Minnesota
Posts: 885
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OR take the cam out and sell it to me!
 i love noise im saving for a gear drive haha gotta love it
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1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles |
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12-28-2002, 01:51 AM
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#8 |
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So Many Ideas, So Little Money
Join Date: Sep 2001
Location: Marshalltown, IA
Posts: 1,610
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Ty, don't you love those fast winding motors? thats somethign that always facinates me with our drag car motor. you punch that throttle and the dominator just dumps SH*T loads of gas in and she's wraping touchin 6 in was seems like a milisecond....
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72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu  Marshalltown, Iowa |
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