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#1 |
Registered Member
Join Date: Aug 2006
Location: budds creek md
Posts: 100
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![]() i have a neighbor that tells me that in a ols hot rod magazine they dyno tested 2 carbs on 3 different motors( chevy ford and mopar)(so he says) and tells me that the artical was called over carburating??? any ways acording to him they all had identical set ups_cam ,intake ,headers ,and heads.they 600 made more hp than the 750.does anyone esle recall this artical or think this is true? all motors were 350-351-360 cid.
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#2 |
Registered Member
Join Date: May 1999
Posts: 5,246
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![]() I don't know about the article, but it wouldn't surprise me a bit so long as the engines weren't heavily modified. Bigger is not always better, and a 600cfm carb setup is more than enough for most smallblocks.
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#3 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Oh how true. Just for a point of comparison, my Warrior motor is 315ci with a 263/281 solid roller cam spinning to more than 9000 on the shifts. I use a 650cfm Holley 4150hp carb.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#4 |
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
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![]() Agreed. A big carb is usually used to hide mistakes made when matching engine components during the build. A well built engine is often more powerful with a smaller carb.
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Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
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#5 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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![]() Put me on the "agree" list as well!
Horsepower TV just installed an engine dyno, and tried MANY different combinations on the same engine, even if it was a "brand X" small block. Bigger is NOT always better. They actually lost power with a bigger carb. Lost power with a set of HUGE tube headers. Honestly it was one of their better shows I've seen! ![]()
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... ![]() |
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#6 |
Registered Member
Join Date: Mar 2004
Location: Minnesota
Posts: 950
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![]() I reccommend you go buy the book Holley; Carburetors, manifolds and Fuel Injection. A good book with lots of useful information. I got mine used (looks brand new though) through amazon.com for like $5, $9 total including shipping. Well worth it.
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Alex |
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#7 | |
Registered Member
Join Date: May 1999
Posts: 5,246
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#8 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() I am sure yall are correct about over carbing an engine. I never see anything smaller than a 750 on the carbed 302's at the track. I tell them that sure is alot of carb for a 14 second car.
They all say the same thing every damn time. "You cant have too big of a carb, the engine only takes in as much air as it needs." With all of the carb questions I have seen lately it makes me glad i stayed fuel injection.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#9 |
Registered Member
Join Date: Aug 2006
Location: budds creek md
Posts: 100
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![]() thats cool that everyone has the same basic thing to say. so w/ that i will be looking for a 650dp this weekend at the fun ford classic.
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#10 |
Registered Member
Join Date: Nov 1998
Location: Houston, Tx.
Posts: 3,887
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![]() I think it was Harvey Crane who once said that "It always seems like the owner wants a bigger cam and carb than the engine does", LOL.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe |
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#11 |
Registered Member
Join Date: Aug 2006
Location: budds creek md
Posts: 100
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![]() now too big of a header will lose power also- learned that years ago first hand- the onlything i could find for a 351 is 1 3/4. i should be ok w/ that.
the rest of my set up is a extreme comp cam xe284h performer rpm air gap 1.6 roller rockers keith black flat top w/ 2 valve releifs pro comp 190cc aluminum heads bbk 1 3/4 long tube headers 350 dp holley or maybe a demon if i find a deal. anything anyone would change? |
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