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View Full Version : Spun Bearing. Frankenstein Build? Turbo?



RandyMarsh303
11-08-2012, 01:30 AM
Three days ago I was driving down the highway and a wicked noise a' started. Seems to be a spun bearing but have not broken into it to find out. Not really interested in doing a rebuild on it because it seems to be about the same to get a donor. Fortunately I recently registered for the auto auctions so I will be going to try and get something from there this coming Monday.

I do not have the cash to buy a WRX and swap everything like I would like to do (that is unless something amazing happens at the auction) so I will be going a different route.

I would like to get a donor that has a 5mt so that I can do the AT/MT swap at the same time. Only problem is only donor with a 5mt is a 99 L so has EJ22 (116k). With that being said I was thinking I could swap my 2.5 heads on to make lower compression and make way for some boost? Obviously not much but would be a nice place holder until I purchased the swap I really wanted. Has anyone done this type of frankenmotor before? examples maybe?

Second is a 99 SUS with a EJ25D and AT (strangely enough also 116k) now this would be nice because unless the turbo makes sense I would like to have the power of the 2.5. Even though its not much its still noticeable and will be cheaper then the third option.

Third and final option is a 99 2.5rs with AT (85k). Auction house states that it runs and drives with good title but has some front end damage. From pictures it does not seem to be that bad. If this was in drivable condition then I will go for this so long as it stays within my price range. Then set the legacy aside and do a full build. If it is only good for parts then my question to all of you is, are there benefits to the EJ253? Would this be a better option then the EJ25D from the SUS?

Viewing for these vehicles is this Friday 11/9. I will get a better idea of what I am looking at then.

If anyone is interested in looking at the auction listing then here are the steps to find said listings....
Click Here >>>>https://www.traauctions.com/TRAPortal/traportal.aspx#page=Calendar;view=InitialState
Click on Monday November 12th
Then select the Denver CO auction. Should have 500 some cars available
Sort by Make
Navigate to page 5 and Browse subarus

Any and All help/advice/opinions is always appreciated. Cheers! :smt023

harrymaneuvers
11-08-2012, 09:42 AM
The EJ22 with 2.5 heads will make a HIGH compression motor... not a low compression motor good for boost. I guess it depends on how bad you want a 5 speed.

RandyMarsh303
11-08-2012, 12:29 PM
hmmm thats strange. I did a lot of searching before posting this and I thought I read that it would make for LOWER compression. So then does putting 2.2 heads on a 2.5 also make HIGH compression.

Actually it seems that you posted in it harry. Check it out, first couple posts say that it would make low compression. Is there something im missing here...

https://sl-i.net/FORUM/viewtopic.php?f=11&t=25737

Oh and I really really want that 5mt haha but not bad enough to not make a well thought out decision haha

Also this thread has good information up until about post #9
http://forums.nasioc.com/forums/showthread.php?t=2094593

RandyMarsh303
11-09-2012, 09:47 PM
Nobody? I'm a little disappointed....

anothernord
11-09-2012, 10:43 PM
My advice is to plop in a stock motor that you won't have to worry about at all until you have enough money for a real swap or turbo build.

harrymaneuvers
11-10-2012, 11:37 AM
Sorry... you are right. I misyped.


Yes an EJ22 block with EJ25 heads will make a low compression engine good for boosting.

The EJ25 block with EJ22 heads is a high compression motor.