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11-03-2011, 12:54 PM
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#1 |
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Registered User
Join Date: Aug 2011
Location: Rockport, Tx.
Posts: 79
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Big Block Rev Limit
Just curious, but since I bought this truck with a supposedly fresh rebuilt 454, and I have no clue as to what was actually done other than rebuild it to stock specs, what were factory engine specs on a 454--- horsepower, torque, and rpm limits.
My guess on rpm limit for stock big block would be 4200 or so, but that's a guess. My previous experiences have been with small blocks, and I'd heard that the big blocks needed help to get to the higher rpm limits. I haven't done anything but drive it, and it does run strong, but I'd like to know more about these engines. Thanks in advance! |
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11-03-2011, 07:42 PM
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#2 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,469
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Re: Big Block Rev Limit
Do alot more than 4200. Though it's hard to say just how high you can go without knowing what was done. But I'd say 5500, after that probly fall on it's face.
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS |
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11-03-2011, 09:10 PM
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#3 |
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Registered User
Join Date: May 2008
Location: Waukesha, WI
Posts: 904
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Re: Big Block Rev Limit
Back in the 60's and early 70's 396s to 454s with hydraulic cams typically had 5,000 to 5,500 redlines. Solid cam motors were 6,500 (LS6)
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70 stepside 76 blazer 86 Silverado 20 Max Trailering 6.2 Crew 71 Nova SS My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=363634 |
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11-03-2011, 09:15 PM
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#4 |
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Registered User
Join Date: Oct 2011
Location: Tucson, AZ
Posts: 55
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Re: Big Block Rev Limit
I would say 5500 is safe. Won't pull very hard past that anyway.
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11-03-2011, 09:25 PM
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#5 | |
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#16876
Join Date: Apr 2005
Location: Auburn WA
Posts: 12,266
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Re: Big Block Rev Limit
Quote:
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Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. "I love that old car smell"  Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs. |
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11-03-2011, 10:18 PM
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#6 |
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Registered User
Join Date: Aug 2011
Location: Rockport, Tx.
Posts: 79
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Re: Big Block Rev Limit
Thanks guys---I couldn't find anything anywhere on what stock engines (big blocks) are capable of. Since I know nothing about what went in it, I want to treat it as stock.
Once upon a time, in another life, I had the oil pressure light come on in a '63 Ford Galaxie with the speedometer needle buried (I was trying to catch a Road Runner with a 426 Hemi), so I know there are limits on the big blocks... BTW- never did catch the Road Runner, and it cost me an engine on E-3 pay.... |
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11-03-2011, 10:19 PM
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#7 |
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Registered User
Join Date: Aug 2011
Location: Rockport, Tx.
Posts: 79
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Re: Big Block Rev Limit
Forgot to mention my Ford had a 390
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11-03-2011, 11:40 PM
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#8 |
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Registered User
Join Date: Jul 2009
Location: cleburne texas
Posts: 174
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Re: Big Block Rev Limit
7200 for me
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11-04-2011, 10:19 AM
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#9 |
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Registered User
Join Date: Aug 2011
Location: Rockport, Tx.
Posts: 79
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Re: Big Block Rev Limit
Yeah, mine would too maybe---ONCE...LOL!
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11-04-2011, 10:58 AM
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#10 |
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Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: Big Block Rev Limit
Just watch out, when high revving, just because it didnt shoot a rod out the side, doesnt mean said rod isn't now bent or tweaked.
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11-04-2011, 11:44 AM
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#11 |
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a fool with no money
Join Date: May 2005
Location: Overton, Tx
Posts: 532
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Re: Big Block Rev Limit
396's / 427's... 57-5800ish
454's... 55-5600, but like the others have stated, will fall off after around 5100 i use a 7200 rpm chip on the rev limiter for my 468
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Basicly stock 83 SWB with a few Bolt-ons before, during and still during http://photobucket.com/albums/y251/moostifer/truck/ http://photobucket.com/albums/y251/moostifer/motor/ |
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11-04-2011, 04:53 PM
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#12 |
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Registered User
Join Date: Oct 2011
Location: Indian Trail, NC
Posts: 62
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Re: Big Block Rev Limit
Most properly rebuilt 454s will safely go about 6k without a problem depending on the cam. Stock truck and low hp car cams will run out about 5k or a little less. Better cams and valve springs will increase rpm potential according to cam and spring choice.
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