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09-11-2011, 01:47 AM
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#1 |
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Registered User
Join Date: May 2011
Location: Anahuac Tx
Posts: 111
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My 1986 305
My 86 305 motor started a deep knocking last week. I am changing out the motor with a GM 350 replacement from scoggin dickey (they advertise on this site). SD shows the stock 350 with 249 hp. All of the rebuilt crate motors available show 330hp. Is 249hp what a stock 350 puts out? I thought it would have been more.
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09-11-2011, 02:59 AM
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#2 |
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Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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Re: My 1986 305
The basic GM 350 puts out 290hp. Not sure which one SD is selling.
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09-11-2011, 09:23 AM
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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: My 1986 305
Check this out, i pulled it from chucks chevy truck page. That 250 hp rating is better than stock.
__________________
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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09-11-2011, 10:58 AM
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#4 |
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Registered User
Join Date: Sep 2009
Location: ottawa,canada
Posts: 4,550
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Re: My 1986 305
that crate motor prob has at least a 100hp more than a stock 305 in a c10!
__________________
my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682 |
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09-12-2011, 12:21 PM
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#5 |
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Registered User
Join Date: May 2011
Location: Anahuac Tx
Posts: 111
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Re: My 1986 305
Great! Thanks for the information. I am waiting for a shipping quote so I can order the motor.
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09-12-2011, 07:30 PM
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#6 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: My 1986 305
You can find year specific information here: http://coloradok5.com/specs.shtml
HP changed due to emission requirements. |
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09-12-2011, 08:25 PM
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#7 |
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Registered User
Join Date: Sep 2010
Location: Kirkland, WA
Posts: 241
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Re: My 1986 305
You also need to keep in mind that many of the advertised horsepower ratings for crate engines (not stock engines) are for engines equipped with a "performance intake", a 4-bbl carb, and headers. If you're planning on swapping over your crappy iron intake and 2-bbl carb from your stock engine, you're not gonna see the power you expect to.
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