How many horsepower does a ZZ engine have?

ZZ ENGINES (350″ – 345 & 355HP) SMALL BLOCKS SERVICE PARTS LIST 12561723 (PARTL) 10134338 (ZZZ) 10185025 (ZZ1) 10185025 (ZZ2) 10185072 (ZZ3) 24502609 (ZZ4) CATALOG SERVICE DESCRIPTION STAMPED ZZZ ZZ1 ZZ2 ZZ3 ZZ4 GROUP NUMBER QTY

What kind of performance Cam does a GM zz1 use?

Performance cams often involve 0.500″ lift or more, which requires either cutting down the valve guides, using reduced-height retainers, or both. New Gen-I-style Vortec heads are fairly reasonably priced from GM. Aftermarket cylinder head manufacturers offer Vortec-like heads, as well.

When did the ZZZ 350 crate engine come out?

Over-the-counter factory replacement engines have been available for decades, but when GM Performance Parts released the 350 high-output crate engine–dubbed the ZZZ for its block-stamped manufacturing code–back in 1989, it was not immediately obvious how big an impact the move would have on the speed-parts business.

How to use head gaskets to decrease the compression ratio?

Step 1. Calculate the required thickness of the thicker head gasket based on the desired new compression ratio. A rule of thumb for automotive engines is that a 0.025-inch increase in head gasket thickness will lower compression about 0.5-points.

What’s the compression ratio for cast iron heads?

For those running 87 octane, 8.7:1 is the most that is safe with cast iron heads, 9.7 with aluminum. Race fuel, on the other hand, at 110 to 118 octane will allow compression ratios of 14.5 to 15:1 if tuned properly.

What should the compression ratio be on a small block Chevy?

We hope to achieve a safe compression ratio of around 13:1 running on either E-85 or 93 octane with an additive. We will keep you posted on our progress. This 383ci small block Chevy is being built to run on 87 octane, which with aluminum heads will limit our safe compression ratio to 9.7:1.

What was the original name of the ZZZ engine?

Still available in revised form as the ZZ4, the original ZZZ led the factory charge into the aftermarket engine business and forced independent engine builders big and small to compete with lower-priced crate engines that carried more than a taillight warranty.–Matt King”

How many horsepower does a ZZ engine have?