The stock compression is 9.3:1 using (305-5.0) 58cc heads. If you go up to (350-5.7) 64cc heads (Vortecs) then use Felpro embossed shim gaskets then you'll stay at 9.26:1 compression ratio. You just have to make sure the deck on the block is true, as well as the heads.
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What are the specs of a GM Performance Vortec head?
* All GM Performance Vortec heads have 2.00-inch intake and 1.55 exhaust valves with five-angle valve jobs. Intakes have 45-degree,.060-inch-wide seats; exhausts are 46-degree,.080-inch-wide, and are induction hardened. These heads have provisions for center and perimeter bolt valve covers and dual intake manifold bolt patterns.
Can a supercharger boost the performance of a Vortec engine?
It is the simplest way to boost the performance of your vehicle, and there are plenty of choices when it comes to a supercharger for a 5.7 Vortec engine. Vortec is a type of engine designed by General Motors, and it’s been around for more than thirty years. If you decide to supercharge your truck, it will give you an immediate boost in performance.
Can a supercharger be used on a Chevy Silverado?
Even though this is a different model compared to Silverado or Sierra, it still has a 5.7-liter Vortec, which means you can use the same supercharger on these vehicles as well. The only thing that matters when buying a blower for your car is to find a model suitable for the type and size of the engine in your vehicle.
How to increase the power of the Vortec 5700?
The simplest way to increase the power of Vortec 5700 is to supercharge it. By introducing more air to the combustion chamber, the Vortec 5700 will be able to burn more fuel and gain more power.
What makes Vortec heads so unique?
What angle are the intake holes on a Vortec head?
Do Vortec intake ports align?
Do Vortec heads require a thermostat?
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What headers work with vortec heads?
standard sbc headers work fine on vortec heads.
Do I need different headers for vortec heads?
Vortec heads do not require a different exhaust manifold. I have headers for the standard head on mine, with Vortec heads. Install a GM 350 HO engine in my '80 corvette. The engine has vortec heads on them and I am told that a special exhaust manifold is required due to the exhaust port shape.
What size are the header bolts on a Chevy 350?
3/8-16X3Mr. Gasket Stainless Steel Header Bolts, 3/8-16X3/4 12Pc, Silver (2210G)
How do I know what size headers I need?
For performance engines, operating at higher rpm, you can use the formula below....Recommended Header Primary Tube Diameter.Horsepower OutputPrimary Diameter275-425 hp.1 5/8 in.400-500 hp.1 3/4 in. or 1 7/8 in.500 hp. or more2 in. or larger1 more row•May 11, 2017
When did Chevy introduce vortec heads?
1996The cast-iron Vortec heads were released in 1996 and produced through 2001. Abetted by a newly redesigned coolant crossover passage, these heads could be bolted directly onto a First-Generation small-block engine with the help of some aftermarket parts.
Where are Hedman headers made?
Whittier, CaliforniaHedman Hedders has been building headers for trucks and muscle car applications in the same Whittier, California, manufacturing facility for more than 20 years.
What size are small block Chevy header bolts?
ARP Fasteners 400-1201 Exhaust Header Bolt For Use With Chevy Small Block; 3/8 - 16 Inch Thread Size; .
Are short or long headers better?
0:133:32Long Tube Vs Shorty Headers - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe long tube header builds more power in the mid-range. And top-end whereas the shorty headerMoreThe long tube header builds more power in the mid-range. And top-end whereas the shorty header builds these power mostly on the low end much closer to the performance of a stock manifold.
How much HP do shorty headers add?
How much hp do shorty headers add? On a stock engine, around 3 hp above the usual.
What headers give the most horsepower?
Medium and long-tube headers allow an engine to make more horsepower at high rpm.
Headers for Vortec Heads. Can I use my old headers?
I have a set of Thorley Tri-Y headers 375Y. My 1972 Chevelle has a 350 with Vortec Heads. They are not aftermarket Bowtie heads. I believe they are the "Old Style" vortecs. As of now, i have the original gm exhaust manifolds on these heads and they work fine. Im hearing that you can not...
best headers for a 5.7L vortec? - Chevy and GMC Duramax Diesel Forum
I have a set of hedman also on my 75 GMC 454 they are alot nicer than what I had before didn't mean to bad mouth flowtech was just stating what I experienced. the next set of hedders I buy will be Hooker super comp with a 2" primary and 3.5" collectors.
Vortec heads on Gen 1 SBC, what else is hidden? | Hot Rod Forum
Its a true bolt-on, but I personally never re-use head bolts. For not much money you can get new ARP bolts. Pushrods same head gasket same intake gasket different. not only is the bolt pattern different, but the vortec has slightly raised ports.
Vortec heads with headers | Team Camaro Tech
I have a set of Vortec heads for my 350. Question is, will the set of Hooker comp headers fit the Vortec heads, I know I need a different gasket, but a 1969 Camaro 350 header should fit the heads. Just want to make sur before I buy them and cannot seem to find the Hooker Header website to call...
Budget Vortec Head Upgrade: Easy, Money-Saving Benchtop Mods
Words And Photos: Jeff Smith Let’s get this over with right now – if you will accept the concept of strength in numbers, the small-block Chevy is still the king. Sure, the LS family deserves all the hyperbole. But that doesn’t change the fact that there are more traditional small-block …
What makes Vortec heads so unique?
What makes the Vortec heads so unique is the engineers at Chevrolet have found a way to improve performance at both ends of the rpm range. The size of an intake port is usually measured by the volume of liquid it will hold. In the case of '86-and-earlier production heads, that volume was around 160 cc.
What angle are the intake holes on a Vortec head?
In addition, the angle of the holes are different; on standard heads those holes are at 90 degrees to the gasket surface, but on Vortec heads the holes are at 70 degrees, or almost vertical . With just four fasteners per side, the engineers at Chevrolet were now faced with the problem of how to effectively seal the intake manifold to the heads.
Do Vortec intake ports align?
But before you start to visualize that early dual-four intake manifold on Vortec heads, there's some bad news: The intake ports won't align. The higher ports on the heads result in a gap between them and the top of the manifold runners.
Do Vortec heads require a thermostat?
In any event, Vortec heads require high-runner manifolds, no matter which bolt pattern is employed. Another unique feature of Vortec heads and manifolds is that there are no exhaust heat passages in either. In addition, '96-and-later engine blocks don't have a thermostat bypass in the block (see accompanying photos).
What makes Vortec heads so unique?
What makes the Vortec heads so unique is the engineers at Chevrolet have found a way to improve performance at both ends of the rpm range. The size of an intake port is usually measured by the volume of liquid it will hold. In the case of '86-and-earlier production heads, that volume was around 160 cc.
What angle are the intake holes on a Vortec head?
In addition, the angle of the holes are different; on standard heads those holes are at 90 degrees to the gasket surface, but on Vortec heads the holes are at 70 degrees, or almost vertical . With just four fasteners per side, the engineers at Chevrolet were now faced with the problem of how to effectively seal the intake manifold to the heads.
Do Vortec intake ports align?
But before you start to visualize that early dual-four intake manifold on Vortec heads, there's some bad news: The intake ports won't align. The higher ports on the heads result in a gap between them and the top of the manifold runners.
Do Vortec heads require a thermostat?
In any event, Vortec heads require high-runner manifolds, no matter which bolt pattern is employed. Another unique feature of Vortec heads and manifolds is that there are no exhaust heat passages in either. In addition, '96-and-later engine blocks don't have a thermostat bypass in the block (see accompanying photos).