Question: What Are Chevy Power Pack Heads?

How much horsepower does double hump heads add?

Stock “double hump” heads flow 202 cfm intake and 141 cfm on the exhaust.

If you must maintain a stock looking port, consider our “Undercover Porting”.

With our “Undercover Ported” they will flow 220-230 cfm intake and 165 cfm exhaust.

This flow improvement will add 15 to 25 horsepower to your engine..

How much power can a 283 make?

315 horsepowerIn all, five separate versions of the 283 were produced between 1957 and 1967. Horsepower was offered as little as 185. But the 283 could be boosted to a maximum 315 horsepower, which is a remarkable feat given its displacement.

Do aluminum heads make more power?

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.

What are the best stock small block Chevy heads?

Peak Torque and HorsepowerCylinder HeadPeak HorsepowerPeak TorqueEdelbrock395 at 5,900 rpm409 at 4,200 rpm (5)Speedway381 at 5,400 rpm409 at 4,200 rpm (5)Vortec378 at 5,300 rpm408 at 4,300 rpm (7)Stock Iron358 at 5,800 rpm379 at 4,300 rpm (8)4 more rows•Jul 12, 2012

Will 305 heads work on a 350?

The combination worked out ok. It ran well and made good power. The 305 heads I used had a smaller combustion chamber than the 350 heads that were on the motor originally so it bumped the compression a little. The downside was the heads also had smaller valves so that was a bit of a disadvantage.

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 Flo Tek heads any good?

The flow-tek heads are good. budy who owns a machine shop says the castings are well done, and decent valves. Says after some rework they are good to go for the price can’t go wrong.

Will 283 heads work on a 350?

283 heads are not a good idea on a 350. They will increase your compression, but they’ll kill your overall horsepower by seriously constricting your flow at anything above probably 3000 RPM, so you’ll make no power with them.

Are Chevy 993 heads any good?

They are not the best and considered “smog garbage” but they aren’t that bad, they are the best of the worst. 993’s have large 72-74cc chambers, but they have heavy casting that can, take a good porting job. Mildly Ported 993’s with stock valves.

Are 041 heads good?

They are sleeper heads as nobody knows they are as good as a fuelie casting. 64cc chambers will up the compression nicely. A very good factory casting but they are not as good as an aftermarket head. If you do not have to do much work on them they are usualy a pretty good bargain.

What are Chevy camel hump heads?

These heads got their nickname because of the raised identification shape on the each end. It’s two half-ovals connected by a straight bar-most easily described as “two humps.” Some of these are also nicknamed “Fuelie” heads because a version appeared on fuel-injected 327-powered Chevy Corvettes.

Are 882 Chevy heads any good?

GM 882 Iron The smallest of the GM heads we tested at only 151 cc, the 882, turned out to be the best-flowing of the early iron heads. This head was tested with the 1.94/1.50 valves. … If you are into these heads, the best way to find a good one is to flow-test several. But in most cases, that’s impractical.

Are Vortec heads better than double hump heads?

The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

Can you put aluminum heads on a cast iron block?

If you are installing aluminum heads on a cast-iron block, the difference in expansion rates can cause sealing problems. Because of this, composite gaskets seem to work best. There are different designs available. Just make sure whatever you use is applicable in an aluminum-head/iron-block situation.