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Building an FA20 Race Engine for Michele Abbate: Part 2

by Mike Kojima

 

So when we last left off, we were putting together some awesome parts for Michele's engine and were about to embark on assembling it. In the interest of long-term durability, we added a few tricks to our build over the last one we did for the Stay Crushing car.

Read Part One!

 

We cleaned and measured our block and found that our core engine had very little wear. The engine had been purchased on the cheap. 

It had inhaled some water somehow and had a bent rod, but we could not find any other significant damage. The engine had been making a knocking noise when it was pulled, and we found that the piston skirt was making light contact with the main bearing buttress at the bottom of the bore. 

There was no major damage to the block/engine case, only a light mark. The main bearing bores were straight and within spec, and the cylinder bores were easily within STD bore so we did not have to go to oversize pistons. 

 

The block was lightly honed to prep the walls for new rings then platue honed for fast seating, low wear, low friction and low oil consumption. 

After honing the bores, we WPC treated for further wear and friction reduction.

 

The crankshaft was checked for journal wear, then was sent out to be Magnafluxed checked for cracks. Then, it was off to the machine shop to be balanced, polished and lastly, WPC treated on the journals for wear improvement and friction reduction. 

The blued look is the OEM induction hardening of the journals. 

 

We sent the JE pistons, rings and piston pin out to get WPC treated. 

The lustrous silver color is the result of the WPC treatment. WPC treated parts have a silky smoothness to them that is readily apparent to the touch. 

 

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Comments
Crousti
Croustilink
Tuesday, January 30, 2018 2:17 AM
ARP bolts used => need to check for the need of a line hone ( that is written on their website and is usually the reason for main bearing failures on 2jz, SR, RB and so on). Since it spun a rod bearing it may not be the cause, but you might want to check this, otherwise it might end us being the next catastrophic engine failure cause.

Mike Kojima
Mike Kojimalink
Tuesday, January 30, 2018 8:36 AM
of course, we checked it with the ARP studs.
Dan DeRosia
Dan DeRosialink
Tuesday, January 30, 2018 9:16 AM
Do you know offhand what size supercharger pulley that was? Sucks about the oil pump gear... didn't the 4AGs used to do that? I don't think that was the sort of heritage Toyota/Subaru was intending to hearken back to...
Bradl3y76
Bradl3y76link
Tuesday, January 30, 2018 10:05 AM
What weight/type of oil did you use?
SM_Clay72
SM_Clay72link
Tuesday, January 30, 2018 10:25 AM
WPCing the rings does not hamper their ability to seat?
Mike Kojima
Mike Kojimalink
Tuesday, January 30, 2018 11:02 AM
WPC treating of the rings make it take slightly longer to seat but it's not an issue. If you clearance the engine right and have the right cylinder wall prep, the rings seat almost instantly. With WPC it takes two instants.
Mike Kojima
Mike Kojimalink
Tuesday, January 30, 2018 11:02 AM
I believe the engine was running 15w/50
twist
twistlink
Tuesday, January 30, 2018 11:14 AM
Sad to hear You got to experience the shortcomings of the FA20 firsthand.
Bradl3y76
Bradl3y76link
Tuesday, January 30, 2018 2:35 PM
Do the cylinder heads drain well?
Mike Kojima
Mike Kojimalink
Tuesday, January 30, 2018 2:46 PM
We are wondering about that.
240rsMaxi
240rsMaxilink
Wednesday, January 31, 2018 1:52 PM
If you look at the WRC EJ blocks (which are wetsump, although the sump is very well developed), the cyl head oil drains are enlarged a good amount.
Mike Kojima
Mike Kojimalink
Wednesday, January 31, 2018 8:20 PM
Thank you for that info!
CrazyButterfly
CrazyButterflylink
Monday, February 12, 2018 12:23 PM
So Mike,

Did you take Twist's advice from part one and do something with the pan to at least try and prevent the oil starvation issues?

Also, second hand info...but heard those Piper Camshafts are cracking/breaking..
BHerb
BHerblink
Saturday, February 17, 2018 5:25 PM
Toda Racing already makes an upgraded oil pump gear for the FA20.
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