What is a Subaru RA block?

Subaru RA Block
A Subaru RA block refers to the short block used in the Subaru WRX STI Type RA. It is a fully assembled short block that includes new pistons, rods, bearings, and crankshaft. The RA block is essentially the same as the stock STI block, but it may come with stronger pistons and a forged crankshaft. It is designed to be a replacement short block for various Subaru models, including the 2.5L turbo WRX, Forester XT, and 2005-09 Legacy GT, as well as an upgrade for 2.0L EJ20 turbo 2002-05 WRX models. The RA block is known for its potential power and performance, with some enthusiasts claiming to achieve 500-600 horsepower on it. However, it’s important to note that pushing the block to higher power levels may require additional modifications and tuning.

What is an RA block Subaru?

The Subaru OEM 2.5L 2018+ Type RA STI Short Block comes assembled from Subaru with new pistons, rods, bearings and crankshaft. The engine can be used as a replacement short block for the 2.5L turbo WRX, Forester XT and 2005-09 Legacy GT models as well as an upgrade for 2.0L EJ20 turbo 2002-05 WRX’s.

What is the difference between Subaru STI and RA?

The Type RA design is superior for piston rigidity since it reduces the amount of cantilever, as well as giving better support to the wrist pin itself. Earlier STI pistons weigh in at 414 grams while the Type RA pistons weigh 424 grams.

What’s the difference between a Subaru short block and long block?

Key Differences Between Long and Short Blocks
Short blocks include, and fully assembled, the block, crank, rods, and pistons. Short blocks may include other items such as the camshaft, timing chain, and covers. Long blocks are short blocks with the heads and typically the valvetrain installed.

What are the different types of Subaru blocks?

Subaru Closed Deck Engines

• Open Deck. Open-deck engines are the most common type in the Subaru range due to lower mass production costs.
• Semi-closed Deck. Semi-closed deck blocks are more common in Subaru’s turbo range.
• Full Closed Deck. Finally, we have the fully closed deck design.

What does RA mean in Subaru?

Record Attempt
The RA designation stands for “Record Attempt” and has been applied to various Subaru performance models. The original venture took place in 1989 when a competition version Subaru Legacy broke the FIA World Speed Endurance Record by clocking over 62,000 miles in 18 days and set a top speed record of 138 mph.

Is the type RA block better?

In conclusion, while the STI Type RA block may initially seem like a cost-effective option, its susceptibility to common issues like cracked or broken ringlands and spun bearings, coupled with the absence of a warranty from Subaru, highlight the potential risks of modification.

What is the difference between STI and RA?

The Type RA design is superior for piston rigidity since it reduces the amount of cantilever, as well as giving better support to the wrist pin itself. Earlier STI pistons weigh in at 414 grams while the Type RA pistons weigh 424 grams.

How many Subaru Type RA were made?

500 examples
WRX STI Type RA
This numbered limited edition was restricted to 500 examples for the United States and 75 examples for Canada. The WRX STI Type RA featured 19″ gold-colored forged wheels, carbon roof and spoiler, among other changes. The car also featured a carbon fiber roof and rear wing.

What is the strongest engine block?

Modern aluminum blocks are pretty strong, but a properly built iron block is still ultimately going to be stronger, and that strength offers some benefits that might be less obvious. For instance, if you have a catastrophic engine failure, an iron block is usually going to hold up better to it.

How many type ra subarus were made?

500 examples
WRX STI Type RA
This numbered limited edition was restricted to 500 examples for the United States and 75 examples for Canada. The WRX STI Type RA featured 19″ gold-colored forged wheels, carbon roof and spoiler, among other changes. The car also featured a carbon fiber roof and rear wing.