305 heads on 350 circle track

Garret Bard lined up fourth for the 20-lap feature on Friday night. Bard charged to the front early in the race to complete the sweep of the 305 feature events at Lincoln in 2020. Bard also won in the 305 sprint series’ visit to the track in July. Bard’s win on Friday was his eighth with the PASS series this year.
Let's face it: Stock Chevrolet 305 heads do not perform very well on a race engine. When we modify 305 castings air flow on a stock head is improved from 165 cfm at .400″ lift to 195-200 to cfm with our "Undercover Porting". . This amounts to a 35 cfm improvement at .400" lift.
i ran a set of 416's pretty much stock i even kept the small valves in em. i liked them. For street stock with cast iron manifolds they are very good heads. i ran a 5.62 final on a 3/8 track turning 6200 or so with a crane saturday night special hydraulic cam, it was plenty of motor. They are 58 CC heads. -----
Hot Rod Magazine builds a 400hp 305 The process began with an ordinary 9.5:1 short-block (L69) as delivered from Chevrolet. To this package they added a hydraulic camshaft from Competition Cams' High Energy Magnum series and the attending valve springs and retainers.
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Dec 30, 2020 · For circle track engines, heads that deliver good mid to high RPM throttle response and torque out of the corners will usually win more races than heads that deliver more peak RPM horsepower. Every cylinder head manufacturer offers a variety of different cylinder heads for this reason.
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Let's face it: Stock Chevrolet 305 heads do not perform very well on a race engine. When we modify 305 castings air flow on a stock head is improved from 165 cfm at .400″ lift to 195-200 to cfm with our "Undercover Porting". . This amounts to a 35 cfm improvement at .400" lift.
• Most unported heads approach 85 or 95 % of peak flow at .400? to .450? lift and do not need or want a maximum valve lift over .540? to.555?. Often a low cam lift with 1.65 or 1.7 ratio rockers is very helpful on the intake side as long as lift is kept to about .550?. Exhaust is less critical with 1.5 or 1.55 being the most popular.

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Allstar Performance is one of the leading circle track parts manufacture in the country, we have everything you need to win races. ... $305.00 - $380.00; Sort By: ...
So I'm in the middle of rebuilding a 350 for my car. I pulled the cam, and tried to run the casting numbers off of it with no luck. It's not a factory cam. I'd just leave it in there, however I am swapping to a set of vortec l31 062 heads which I cannot have more than a certain amount of lift (.480 I think, correct me if I'm wrong).

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A FREE place to buy and sell New/Used Circle Track Racing Parts. Please keep it only circle track parts related. Buy and Sell Group
For instance, compare a pump-gas friendly flat top 327 Chevy with 9.7:1 compression with 4.000" bore and 64cc heads. now build that block with a 4.000" stroke (yes, it will fit. It's not easy, but it will fit!) and flat top pistons. It suddenly becomes a race-gas only 11.7:1 compression! This means dished pistons or bigger chamber volume heads.

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305 heads on a 350 You will find lots of hate on this one. Putting 305 heads on a 350 was a good way to bump compression back in the day when compression was low, and aftermarket heads were almost “unattainable.” Those days are long gone, and decent heads (be they aftermarket or Vortec) are cheaper than getting work done on old heads.
• 350/330-332 Chevy crate engine increased 2 to 334 HP • 350/300-305 Chevy crate engine increased 3 to 307 HP. Pure Stock horsepower adjustment • 1969-70 Chevelle 350 250/230 increased 5 to 235 HP. 4/25/14. Super Stock Eliminator HP adjustments • 1972-73 Buick 455 250-285 increased 3 to 287 HP (SS/GT only) 3/3/14. Stock Eliminator HP ...
The "601" casting (late '70s, early '80s) 305 HO head is the one they're speaking of. It has the 58 CC chambers mentioned in the previous post. It also has 1.84" intake valves (as opposed to 1.72"). The heads flow pretty well, all things considered. It's an old hotrodder's "trick", like using 283 "Power Pack" heads on 327.
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Nov 10, 2005 · Fast Burn heads also serve as the focal point of GMPP's Fast Burn 385 crate engine--a 350-cube small-block that produces around 400 hp. ... And for "spec-head" circle track engines, this latest ...
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the 462 casting is the same for the 305 and 350. i have 2 engines both same year 1979 one a 305 the other a 350 they both have the same heads and same casting numbers. but the 350 has 1.94 and 1.5 the 305 has like 1.72 and a pussy exhaust. the combustion chamber is the same. 76 cc's. but both the engines are un touched. they have been in my ...
Feb 23, 2014 · But if a production head is going to be used, it makes more sense to start out with the best performing head available rather than using a head because it's cheap (or even free). Remember- the same machine shop time and money will be spent regardless if you're starting with a Vortec head or a 305 head. 305 heads on a 350 SBC Photos
- Mar 19, 2006 · I have a 305 in the car right now and bought the heads for the 305 as an upgrade. They are completely redone and ready to bolt on. i just found/bought a 350 engine for my car which matches up for my 71 Camaro. FYI - I bought the car with the 305 in it already. I didnt find out until later it was a 305..Guy that sold me the car stated it was a 350.)

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The vast majority of the circle track guys are about the cheapest tight wad mothers around (no offense meant - there is good reason),,, and they won’t deny that. 305 heads have always been cheap. There are some claimer classes depending on what place you end the race in,, you can “claim” the winner’s engine for $500.
Used For Professional Competition And Serious Sportsman Racers 4.600 recommended bore size 2.450 intake 1.88 exhaust valve sizes recommended Jon Kaase Racing Pro Stock port work and competition valve job produce outstanding flow numbers Intake 500cfm @.800 lift Exhaust 350cfm @.800 lift Bare Cylinder Heads 1050.00 each.
Jun 26, 2009 · Yes you can use 305 heads on a 350. Its done alot in class, rules limitd circle track racing. The 305 heads has smaller chambers like 58cc rather than most smogger 350 heads large 74, 76 cc...
Cylinder Head, 200cc, Solid Roller, Straight, Aluminum, Assembled, Chevrolet, Small Block Gen I, 305/307/327/350, Each Part Number: FLK-1200SRAC505S Not Yet Reviewed
Jan 26, 2009 · 305 heads can be used on a 350...but not the other way around. The valves in a 350 head will hit the cylinder walls of a 305 due to the small bore. 305 heads usually have 58 cc chambers...so yes, compression will be increased. john56h, Jan 19, 2009
The CT350 is based on our popular 350 HO high-performance street crate engine and features a strong four-bolt-main block, iron Vortec cylinder heads and a unique dual-pattern camshaft. Find Dealer Installation Guides

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Cylinder Heads: The CT350 circle track engine has Vortec cast iron cylinder heads. These cylinder heads were first used on 1996 trucks with port fuel injection, RPO L31. The intake and exhaust ports are very similar to the Corvette 350 LT1 heads. The heads have 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” rocker arm ...
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The 305 heads are the 434 heads with the 58cc chambers so it is the larger of the 305 heads. No matter the head that goes in, the ports will be cleaned up and the valve seats will be reground to make sure there's a good seal, as well as new valve seals.
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93 chevy 350 roller motor. stock bore w/flat top pistons comp cams extreme energy roller camshaft 601 casting 305 h.o. heads 58cc with screw in studs ported ...
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Circle Track/Drag Race .0055” .0060” Blown Race Only .0065” .0070” Nitrous Race Only .0070” .0075” Notes: 1. The chart above is a general guideline. Each ring should be fitted to the particular cylinder in which they are to be installed. 2. The gap on the second ring should always be larger than the top ring end gap, this will

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The first thing we needed was a small block Chevy engine on which to evaluate power. Since this was a low-buck cylinder head test, we decided to use our budget small block 350 Slayer engine from ...
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Apr 14, 2004 · You need steam holes and be sure you have the right head gasket. FelPro sells performance gaskets for small block 400's but they are not recommended for extended use under 3000 RPM. Just use their standard gasket. Ditch the 305 heads. Sell them to somebody with a 305. Anything from a 350 or 400 with 76cc chambers and steam holes will work.
Aug 29, 2011 · The 305 heads were awesome (casting 14014416) and Z28 springs (no port work, stock valves) with a 355 flat top solid or hyd cam. Solid cam was a pretty big cam (Speedway Motors' 2 barrel grind) with QJ and open tube headers...would turn 6800 rpms all day.
so great pull my valve cover off today and for the first time remembered to run the casting number came back as 305 heads on a 350 aint to happy about it but want to know more does anybody have any information. McCauley5983 G3GM Enthusiast Street Cred: 14. Like Dislike . Re: 305 heads on a 350. by 77malibu77 on Wed Sep 15, 2010 9:50 am

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When bolted on, this manifold will actually increase the air flow by 5% at .300" valve lift and 2.3% at .600" valve lift over the head alone. This light weight manifold (16 lbs) will give the Buick 350 a 15-35 HP increase, and improve torque and power from 0-6500 RPM all while reducing engine weight by 40 lbs. Manifold Features
Nov 10, 2005 · Fast Burn heads also serve as the focal point of GMPP's Fast Burn 385 crate engine--a 350-cube small-block that produces around 400 hp. ... And for "spec-head" circle track engines, this latest ...
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Jul 12, 2012 · The first thing we needed was a small block Chevy engine on which to evaluate power. Since this was a low-buck cylinder head test, we decided to use our budget small block 350 Slayer engine from ...
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Street Legal Circle Track Camaro. Jim Volgarino February 4, 2015 at 8:36 am. When I saw this car I was mesmerized by the build quality. Keith Larson said some nights he would ponder some issue for hours, trying to figure out how to do it right, many times scrapping one idea (and fabrication) and heading toward another one.