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06-08-2010, 08:05 PM
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#1 |
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White wall terror
Join Date: Feb 2009
Location: Croydon, Pa.
Posts: 152
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307 horse power ?
I have a 71 with a 307 2 barrel carb. Does anyone know what the stock rating for horse power and tourq is?
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06-08-2010, 09:34 PM
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#2 |
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Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 307 horse power ?
my chilton manual says for 1971 200hp@4600rpms and 300tq@2400rpms w/ 8.5:1 comp this was a 67-86 van manual, i have the truck manual one in my truck across town i'll check it tomm. but cant imagine their much different. thats gross hp&tq figures. hope this helps
Last edited by 292farmer; 06-08-2010 at 09:40 PM. |
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06-08-2010, 10:28 PM
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#3 |
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Registered User
Join Date: May 2009
Location: Eliot, Maine
Posts: 1,314
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Re: 307 horse power ?
200hp?....yeah, in a 400 big block.
the stock 2bbl fed truck 307 has like 130-135 (at the flywheel) horsepower. throw a 4 barrel on there and free up the exhaust a bit and maybe get 150hp. i'm putting a q-jet and edelbrock intake on my 72 burb with the stock 307 'cause i want more top end performance and better low end economy and throttle response than the 2 barrel can deliver. i have an edelbrock performer intake (idle-5500 rpm range) and the air box is a dual snorkel bottom w/ the lid off my dad's 84 burb w/ trailer package so i get plenty of air going through a 14x5 filter. i hear some GM cars got a H.O. version of the 307 with a 4 barrel and other tweaks that was closer to 200hp. 
Last edited by capev86; 06-08-2010 at 10:32 PM. |
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06-08-2010, 11:04 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Tomball, TX
Posts: 578
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Re: 307 horse power ?
There's a difference between gross hp and net hp, gross is with no accessories and headers, and net is the actual figure when installed in the truck. My 4bl 350 has 255 gross but only 195 net. So 200hp is correct for gross, but his net is probably closer to 135 or less with wear and tear.
__________________
'68 C10 LWB 6.2NA/NP833 3.73's |
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06-08-2010, 11:40 PM
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#5 |
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Registered Chevy Owner
Join Date: Aug 2008
Location: Snohomish, wa
Posts: 1,557
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Re: 307 horse power ?
I would suggest running the numbers on the block.
__________________
Love is fleeting, but Chevy trucks are forever!!!!  1970 Chevy CST C10 long box 350/400  2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350 |
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06-08-2010, 11:54 PM
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#6 |
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Registered User
 
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,425
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Re: 307 horse power ?
Ya gotta remember... That figure is for brand new. I think my 1980 454 in my dually was rated at 180 hp. My 1996 4.3 v-6 is also rated at 180 horses. You sell horsepower & drive torque.
 john
__________________
junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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06-09-2010, 06:10 AM
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#7 |
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Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 307 horse power ?
thats why i added gross at the end seemed high but if u look close in my earlier pic u can see in 1972 when they changed to SAE the hp went to 130hp, sorry bad pic. and in sure that this manual is not 100% accurate but it gives specs for all the years, and i use it to help give a general idea.
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06-09-2010, 09:30 AM
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#8 |
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2WD Jimmy
Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,565
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Re: 307 horse power ?
[QUOTE=307 horse power?
 sorry... couldnt resist.
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06-09-2010, 05:03 PM
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#9 |
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White wall terror
Join Date: Feb 2009
Location: Croydon, Pa.
Posts: 152
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Re: 307 horse power ?
Tom Vogal, your dead to me, lol
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