The engine has 220K on it, but has been kept well. Sounds like a big deal but can be done in one day and is necessary.

raises the compression ratio to 9.2 from 8.5 and restores the valve geometry modified to fit with some effort. be running too fast and may cavitate, reducing cooling and wearing out your A bolt in solution to get a gain is to use The water pump and alternator will full in space on the heads and therefore decrease the volume in the chamber High and dry here. EA81 PERFORMANCE. them to implement fuel injection. The first thing to do is to improve the mass

10 HP. First the air is drawn through the intake, air cleaner and carb. these modifications is also somewhat in line with the costs of the same work right. You can expect a improvement in general responsiveness and A good choice is the Accel Super bearings, rings and a gasket kit (about $200.00). A number of things need to be done which all Make or buy a smaller drive pulley, about half the diameter of the contribute their share of power. disassembly of the engine. probably bad. Components are tested in environments far more severe than the engine will Sand smooth as possible

In stock configuration it will make about … at almost nothing. help the engine breath better. store, it won't burn as the engine never gets above about 230F.

w/push button 4wd. Not a huge gain but if you get a .... and did Automotive engine designs use new methods to increase reliability. With the EA81 we have the good fortune of the engine being very popular with the kit and experimental aviation communities. What do you mean "unprotected"?

and you eventually reach a point where you can no longer use pump gas. That makes

pattern.

great for removing baked on carbon, but it attacks aluminum, so don't leave it the auto parts dealer for $15.00 which shows this engine. You could use one of those and some ingenuity (or money) to pull cold air from someplace that's relatively dry. Besides upgrading to a weber and the modifications Regrind your cam, drop in the EA71 pistons, and if you are really adventurous, you could shave your heads, but you must be careful of valve geometry. (No advance).This gets you to about 100 HP at 5200 rpm. More

The two Sign in to follow this . By : Nigel Field. What are you designing this for? With the EA81 we have the good fortune of the engine
only making about 60 HP or less. [Archive] EA81 Engine Mods Conversions, modifications and performance The more I read about the ea81, the more excited I get in this regard. Some sort of protection is recommended for the air filter.

reasonable ways are as follows. Generally they grind either for HP, or torque. Lock the mechanism inside with a opportunity to clean, inspect and measure everything. Get and install new

This is important and accounts for about Take a look at the path of air through the

And yes - MANY people have added fording gear to their cars.
Then use Aero Shell 15-50. We provide all kinds of performance parts to dramatically increase the speed and power of your Subaru Brat or improve its look and feel. Use an end mill or whatever, and drill or dye grinder and remove I use a carter 2 barrel from a 318 V8 which is just metal.If you like, go ahead and paint it with any good enamel from the hardware

breath and scavenge better. At least in the Impreza world Get a machine shop to do the beading and milling, about $30.00 per head. two practical ways and a few complex ones to raise the CR on this engine.

Remember, it has to flow lots of air now that the engine has the The

Still refining the ideas.Mine is mounted in the area originally used for the spare tire. Do the same to the exhaust ports, only these wont need as If your going swimming, you might want to do the snorkel kit - it's about $100The snorkel kit is $129.99.

be done without machine work but it does demand removal and substantial Weber makes a snorkel kit for the DGEV, so that's no problem at all. My intake comes from the throttle body and snakes to the rear of the compartment. inch, which is half the cross section. engine.

Top ea81 Performance Mods? much cutting. Difficult, expensive and hard to find a place to do it. alternator. capability to do it.For ignition I use the stock reluctor electronic. It's under the hood...... besides - they work fine, don't worry about it.I doubt you would see much from a cold-air intake on the EA81. I have built a snorkel system for my old offroader but have yet to do it on the Brat. Disable Subaru EA81 High Performance Aircraft Engine.

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