2.2 soob compression

[Friendly]

I am gathering information on the soob to compare to my engine. Please limit responces to the 2.2 engine.

What is the normal range of compression for a 2.2 soob that has the Delta Cams?
What fuel are the 2.2's burning?
What size prop are being used and what pitch.
What ignition systems are being used?
What temp range does your 2.2 run
EGT?

[barnstorm2]

I am gathering information on the soob to compare to my engine. Please limit responces to the 2.2 engine.

What is the normal range of compression for a 2.2 soob that has the Delta Cams?

What fuel are the 2.2's burning?
What size prop are being used and what pitch.
What ignition systems are being used?
What temp range does your 2.2 run
EGT?

1 I don't have delta's sorry.
2 Still working on that, seems thursty. I am thinking better then 4/hr
3 68" Warp Drive 14.5ish
4 Ford Escort
5 180-200F
6 I don't have EGT (yet)

[automan1223]

Cranking compression on 22 subs is around 150 to 185 on all the engines I have tested with the delta regrind.

the 150 was with a tired 22 and the 185 is my new sub rebuild with new heads and valves. with the delta grind. I have seen some cranking compressions up to 225 with the wrong cams,

Maxie Wildes and myself ran in circles when we could not get a delta cam install to run with the same compression on each side of the engine. The mistake was of course deltas as they SENT US THE WRONG CAMS For a late engine instead of early builds. Of course there are a lot of other factors with head gaskets, cylinder head cc's cam timing, engine wear and stability etc. Point is the engine should be about the same all the way around. COLD AND THEN check em hot. If your engine is down by 150 and all the rockers have had a chance to pump up you either got a soft (defective) lifter in the low cylinder or you got a worn engine.

Jonathan

[Friendly]

This is good to know, I have been running 185 on all cylinders . I thought that was high for a late model car engine but I wasn,t sure with the cams what to expect. How about your ignition system Johathan. What are you using, Mine has the escort, with GM modules and coils. one is the redundant ignition.

[automan1223]

I am running the ford escort distributor with ford module. I will be doing and upgrade to heat sunk gm modules they have slightly better dwell potential. Any coil with above .7 ohm should be ok with 2 modules running in parallel.

Stock ej engines list 9.0 to 1 compression ratio. the newer ej engines run 9.7 to 10.0 depending model year etc. You could extract a bit more compression by using a thinner head gasket or having the heads precision milled 20 to 30 thou. The cylinder heads are also an area for improvement. A mild port and polish job to clean up the seat and bowl area is sorely needed on all the stock heads I have pulled apart. This flow improvement is a plus in the higher rpm ranges so its worth doing on any engine going on an aircraft.

If your engine is tired putting in a hot set of cams will actually make less power as sealing efficacy goes in the toilet with more overlap and more lift. 185 is good.

Your cranking compression could increase but so could your cooling system temps if you have a weak radiator, and ability to knock on cheap gas. Right now I would run 89-91 octane no higher no lower. You could also have problems down the road with carbon build up causing knocking when cold in the quench area. My suggestion if you are looking for more power is to put a headdered exhaust pipe. and then just go for more displacement to a 2.5.

My old engine was turning a 2.25 ratio 4 blade warp drive 68 " prop at 9.5 to 10 degrees. To give you and idea of power output.... brad kind is running a ej 2.5 with 72" same prop same redrive and is at 13.5 degrees.

There are many many areas that one can build a real rock solid ej 22 and get a bit more power out of it to power the heavy beast machines. However if you are going to rebuild an engine it might just be easier to start with a bigger engine in the first place. I know there are many guys who say that the early engines are more reliable but having done my homework I can say that all subs when properly rebuilt and set up right from the start are very reliable. no matter what disp or cylinder heads. The problem is of course the cost of sub parts oem that is. And that is the only way to go btw.

Jonathan