Which SBC heads are best?
Peak Torque and Horsepower
| Cylinder Head | Peak Horsepower | Peak Torque |
|---|---|---|
| Summit | 405 at 5,900 rpm | 416 at 4,400 rpm (4) |
| Edelbrock | 395 at 5,900 rpm | 409 at 4,200 rpm (5) |
| Speedway | 381 at 5,400 rpm | 409 at 4,200 rpm (5) |
| Vortec | 378 at 5,300 rpm | 408 at 4,300 rpm (7) |
Will aluminum heads add horsepower?
Because the alumiunm bleed off heat and heat is power. Now almost all the power is made in the heads. If you go to a head that adds a little CR, better flowing ports, bigger valves etc you will see an increase.
Are aluminum heads worth the money?
Yes they are worth it. Pretty much every aftermarket head is worth a good power increase over any stock head. I like the aluminum heads since they are easier to port, repairable, and give a nice weight reduction. They usually are only a few hundred more than the iron heads.
Are Ebay aluminum heads any good?
They are good heads but when you get them, they will need machine to clean them up. I have a friend that runs them and has no problems at all. He had his machinist machined them to flow as much as an AFR head.
What size heads for 383?
A 383 that want to go to 7000 rpm then 210 cc head is what is needed.
Who makes Summit Racing aluminum heads?
They are made by Canfield and are very good quality. They are listed at $569 each for their 197cc heads. They flow a little over 250cfm on the intake.
What is the advantage of aluminum heads?
Aluminum heads will dissipate heat faster. This allows for higher Compression Ratios with less risk of Detonation. The cooler head also delivers a cooler air/fuel mixture to the combustion chamber. Cooler air is denser and can make more power.
Why can you run higher compression with aluminum heads?
Yes you can slide by with more compression on with aluminum heads because they do indeed transfer more heat out of the combustion chamber (at a faster rate) than steel heads do. The ultimate point of detonation is determined by air fuel mixture and dynamic compression ratios; assuming there are no preignition sources.
Do aluminum heads crack?
Aluminum is less prone to cracking and warping than cast iron is. It cools down faster, throws heat faster, and is repairable, where cast iron has none of these features. Cast iron on the other hand is very prone to cracking, especially in high heat conditions.
Who makes Patriotheads?
Promaxx Performance
Promaxx Performance still produce Patriots aftermarket Performance Cylinder Heads to suit Small Block Chevrolet (SBC), Big Block Chevrolet (BBC), GM Vortec, Small Block Ford (SBF) and 6.0L Ford.
Where are Nkb cylinder heads made?
Melling springs are made in the USA. All of our engines using the NKB heads use these springs. Spring failures are near non-existent. We also offer a low cost spring upgrade for these heads.
What is the biggest Chevrolet big block?
A 632 big-block Chevy is about the biggest big-block you can build with off-the-shelf parts. Editor John McGann breaks it down for you.
Why Chevy small block?
The light-weight nature of small block engines puts less weight on the front axle, improving handling and acceleration. The History of Small Block Engines. The small block was the V8 that started it all, predating the big block by decades. The first small block was the Chevrolet Series D V8 engine offered from 1917 to 1919. While historically important, this short-lived series didn’t make a huge impact and was quickly outshined by the standard six-cylinder Chevrolet engines used in
What is the deck on a small block Chevy?
The original small-block Chevy block was designed with 4.40-inch bore spacing and a deck height of 9.025-inches. This means that the block deck is 9.025-inches from the crankshaft centerline. These two dimensions deter-mine the overall configuration of the small-block Chevy.
Is a LS2 a small block chevy engine?
The LS2 “truck” engine could be found in the Chevy Trailblazer SS and SSR, plus the Saab 9-7X Aero. (Image/Truck Trend) The LS2 is a 6.0L, Gen. 4, aluminum small block engine that came in both cars and trucks. The engine specs and information we’re sharing here are for the LS 2 that was used in GM trucks and SUVs between 2005 and 2009.