|
10-06-2002, 08:43 PM
|
#1 |
|
Registered User
Join Date: Sep 2002
Location: long island, new york
Posts: 1,333
|
horsepower?
what is the stock hp of a 350 with a rochester4bbl?
also what do you think it is with the same engine only hooker headers, flomaster duel 2 1/4 pipes, and a mild cam? 
__________________
1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door |
|
|
|
10-06-2002, 10:16 PM
|
#2 |
|
Registered User
Join Date: Aug 2002
Location: mass
Posts: 1,277
|
need more info, many 350s came stock with 4 barrel rochesters
|
|
|
|
|
10-06-2002, 10:56 PM
|
#3 |
|
Registered User
Join Date: Mar 2002
Location: Fernley, Nevada, USA
Posts: 540
|
By mild cam I am guessing its the spec's of an RV cam. I would say less than 265 is a safe bet with the info you provided maybe a lot less depending on the heads or maybe the heads are awsome and its closer to 300... probobly not what you wanted to hear... Pete
__________________
1968 Chevy - 3/4 Ton - 4X4 - Longbed - 383ci - TH350 - NP205 Building the motor, painting the engine bay, rewireing everything... (775)-527-1199 / ryanspeterson@msn.com |
|
|
|
|
10-06-2002, 11:46 PM
|
#4 |
|
Senior Member
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
|
I think everyone thinks 300 hp is easy..a fresh 350 with 9-1CR and a cam in the 215 duraton range @.050 and a good set of heads will make 300 HP. a stock 350 maybe has 225 hp(fresh) some less.. its real easy to say my motor makes 350HP..I DD2000 my engine a dozen times...figured I had around 340 hp and 380 ftlbs of torque.. and that is with a motor that was purposed built..all professional machine work..arp fastners..good rods and pistons,,the best of parts and planing..in real life its closer to 320 hp. Which is A LOT..I spank many 400 HP cars...sorry to rant..lol..just dont expect unrealistic results. Ive learned to guess on the low side...less disapointment..think as your engine as an air pump..more air in..more air out..more power..better intake and carb...better cam...better exhaust will get you more power.. your probably around 225Hp now and with the improvments, around 250-260..Its best to make a plan of what you want...now and into the future..buy parts that can be used on future improvements
__________________
It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA |
|
|
|
|
10-07-2002, 12:09 AM
|
#5 |
|
Used to have a truck
Join Date: May 2002
Location: port orchard WA
Posts: 1,552
|
I agree. I'm guessing 300 HP with my combo as listed below ...maybe 325 max which is completely streetable with gobs of low end torque and relatively quiet. Ive run cars and trucks with a LOT more top end horsepower but you sacrifice so much on the bottom end that way that it makes for a miserable driving experience the 95% of the time your'e not getting on it. 400 HP with a daily driver ( small block ) can be a real pain in the real world and at the gas pump.
__________________
No truck :-( |
|
|
|
|
10-07-2002, 06:58 PM
|
#6 |
|
Registered User
Join Date: Apr 2002
Location: Blaine WA
Posts: 455
|
I read in fourwheeler a while back that a stock 75 350 4bbl made 160hp. If that's true that sucks!
|
|
|
|
|
10-07-2002, 09:08 PM
|
#7 |
|
now thats a true COON DOG
 Join Date: Nov 2000
Location: Franconia, NH
Posts: 1,977
|
Don't forget though chevypunk as the yaers went on the smog restictons got more and more resticive so comparing a 75 motor to a 70 is going to make a world of difference.
__________________
current project 67  402BB stout th350 3.08's with a locker. Plan on tubs 18.5's out back! (thanks Burnsman!)71 SWB Stepside, was a 250, now is a 402 Big Block with 4 speed and 3.73's ( was crushed by a tree, bed sold, motor pulled)  was my first truck!... oh well...72 LWB 4x4 350 4-speed 3.08's posi wearing army olive drab green (SOLD!) 68 BURB 50TH LOOKALIKE work in progress, soon to have 250-I6 with a 3-speed on the tree 4.11's and posi ( currently sitting in back yard tarped awaiting time, $$$, and lots of love!) 67 1 TON- work truck 396 sm 420 4-speed, flat bed 4.57 gears "big red" (my first landscape truck, very rusty and crusty! but still gets the job done when needed!) |
|
|
|
|
10-07-2002, 09:24 PM
|
#8 |
|
Used to have a truck
Join Date: May 2002
Location: port orchard WA
Posts: 1,552
|
I know that with a totally non emmisions carburetor , cast iron intake with no EGR and dished pistons with a stock cam, the motor on my 265 mercruiser ( 350 chevrolet engine ) in my boat is rated at 265 HP . Same motor as a mid 70's target master but with no emmisions controls .
__________________
No truck :-( |
|
|
|
|
10-07-2002, 09:28 PM
|
#9 |
|
WTF
Join Date: Jul 2000
Location: loganville, Ga.
Posts: 118
|
Just look at hot rod or car craft when they go to shows and have the chassis dyno, owners almost always over guess. It may make 500hp on the dyno, but you loose it in the transfer to the wheels, plus on a dyno you don't have all the accessories on it either.
__________________
Some people are wise, some people are otherwise. 72 cheyenne primer factory air lowered rallyes with flat caps flowmasters 12 bolt 3.73 350/350 combo needs rockers . Cowl hood installed. 81 Malibu wagon lowered with 17's bright ass yellow and v-6. 71 225 Electra all original 455/4 81 z28 |
|
|
|
|
10-08-2002, 07:58 AM
|
#10 |
|
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
|
Factory rating on the truck 350s of this era was 255 gross hp. When they changed the ratings to net hp in '72, the same motor was rated 175 net hp. I think what most people use for bragging purposes, and the ratings that Edelbrock etc. use in their advertising are a lot closer to gross than net. Many smog era 350s with 4bbl were rated at 165 net hp.
__________________
Tim |
|
|
|
 |
| Bookmarks |
|
|
Linear Mode
