FA20 vs EJ20 crankshaft - Page 4 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Coheed · 08-09-2012, 02:11 AM

Nice! the rods look beefy for factory, def look 400whp capable. The off center connecting rods are something I've waited to see in production cars for a long time. Cracked caps too, instead of cut. The off-center rods are similar to what a lot of OEMs are moving too. Strange, its a design used in lawnmowers, as well as high end high hp applications. Interesting they would use this design. What do you guys think?

Coheed · 08-09-2012, 02:15 AM

These rods have withstood over 500whp without failure. I wouldn't push it though. Just goes to show you. These rods are from a k20a2, 86x86mm construction as well.

Crawford · 08-09-2012, 02:51 AM

Quote:

Originally Posted by serialk11r

Whoa what is the EJ257 rod length? The FA20 rods look to be not that much shorter!

5.135" on the EJ

rice_classic · 08-09-2012, 02:53 AM

It appears a subsequent underlying theme here for the FA20 is: More power, thicker oil, keeps crank happy.

Any oil engineers lurking around?

Chewie4299 · 08-09-2012, 09:00 AM

I like this thread. I know a lot about bolt-ons and some about FI (made myself learn when I bought an Evo) but just about nothing about engine internals aside from what the primary parts are.

Threads like this are going to be helpful in planning my modding route.

Sent from my Galaxy Nexus using Tapatalk 2

Coheed · 08-09-2012, 09:06 AM

On a turbo FA20, 5w40 rotella will do just fine.

3MI Racing · 08-09-2012, 11:27 PM

Quote:

Originally Posted by Crawford Performance

If you wanted to be creative, you could put a 86mm FA crank into an EJ motor... now see if you can sleep tonight! Lol...

You sir are a wicked, wicked man. Do you have the deck height yet so I can start tossing numbers around?

OrbitalEllipses · 08-10-2012, 01:00 AM

Quote:

Originally Posted by 3MI Racing

You sir are a wicked, wicked man. Do you have the deck height yet so I can start tossing numbers around?

Like feeding crack to an addict.

noAE86 · 08-10-2012, 03:58 AM

btw, love this thread,

as coheed said, very courious as to what people think about the rods, when i first saw pictures of them i had horrid flash backs to mini cooper engines,,, then i thought about the exotics now using them too,

20valvewynn83 · 08-10-2012, 04:34 AM

they make the rod bearings smaller to increase stroke and they strengthen the main bearings to make it stronger at higher horsepower and higher compression rate. yes it is heavier but all that means is you need more to spin it so it may not be the quickest at the light but when you get it moving the thicker counter weights will help it to move faster. This is why all the power is made at top RPM levels. This may also be why replacing the crank pulley an flywheel make such a big difference on this engine.

My opinion: I wouldn't be surprised if we are able to take this to +8k RPM's with out damaging the engine.

Yes i know i put "lagre" instead of "large" to lazy to fix lol

Turdinator · 08-10-2012, 05:15 AM

Subscribed.
Will be keeping mine NA so interested where this thread goes.

noAE86 · 08-10-2012, 08:54 AM

my brain explodes everytime i look at subie oil systems and there cranks,
forged light weight I beam rods and pistons with knife edged crank will be the order for NA, im looking for built 20valve revs,

do subies eat oil pumps at all? im not very clued up on boxer tech,

Draco-REX · 08-10-2012, 09:32 AM

Quote:

Originally Posted by noAE86

my brain explodes everytime i look at subie oil systems and there cranks,
forged light weight I beam rods and pistons with knife edged crank will be the order for NA, im looking for built 20valve revs,

do subies eat oil pumps at all? im not very clued up on boxer tech,

Subaru Oil pumps are pretty solid. They also move a LOT of oil. With 5w-30, oil pressures over 100psi are the norm on the EJ engines, especially 07+. The 07+ oil pumps are common upgrades.

I don't know what the FA engine is like, but I wouldn't be surprised if it's also over 100psi at full song.

Crawford · 09-12-2012, 08:04 PM

Quote:

Originally Posted by 3MI Racing

You sir are a wicked, wicked man. Do you have the deck height yet so I can start tossing numbers around?

Sorry... been away tinkering with motors and turbo kits for these cool rides!

08-09-2012, 09:00 AM	#47
Chewie4299 Spaceman Join Date: Jun 2012 Drives: 2013 Firestorm Scion FR-S Location: Wallingford, CT Posts: 1,581 Thanks: 854 Thanked 860 Times in 468 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	I like this thread. I know a lot about bolt-ons and some about FI (made myself learn when I bought an Evo) but just about nothing about engine internals aside from what the primary parts are. Threads like this are going to be helpful in planning my modding route. Sent from my Galaxy Nexus using Tapatalk 2 __________________ 2013 Firestorm Scion FR-S - Car Journal

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08-09-2012, 02:11 AM	#43
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Nice! the rods look beefy for factory, def look 400whp capable. The off center connecting rods are something I've waited to see in production cars for a long time. Cracked caps too, instead of cut. The off-center rods are similar to what a lot of OEMs are moving too. Strange, its a design used in lawnmowers, as well as high end high hp applications. Interesting they would use this design. What do you guys think?

08-09-2012, 02:15 AM	#44
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	These rods have withstood over 500whp without failure. I wouldn't push it though. Just goes to show you. These rods are from a k20a2, 86x86mm construction as well.

08-09-2012, 02:53 AM	#46
rice_classic Senior Member Join Date: Jun 2012 Drives: Nevermorange FRS Location: Seattle, WA Posts: 4,174 Thanks: 757 Thanked 4,208 Times in 1,808 Posts Mentioned: 78 Post(s) Tagged: 1 Thread(s)	It appears a subsequent underlying theme here for the FA20 is: More power, thicker oil, keeps crank happy. Any oil engineers lurking around?

08-09-2012, 09:06 AM	#48
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	On a turbo FA20, 5w40 rotella will do just fine.

08-10-2012, 03:58 AM	#51
noAE86 Member Join Date: May 2012 Drives: ae86, etc.. Location: CHCH new zealand Posts: 76 Thanks: 0 Thanked 12 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	btw, love this thread, as coheed said, very courious as to what people think about the rods, when i first saw pictures of them i had horrid flash backs to mini cooper engines,,, then i thought about the exotics now using them too,

08-10-2012, 08:54 AM	#54
noAE86 Member Join Date: May 2012 Drives: ae86, etc.. Location: CHCH new zealand Posts: 76 Thanks: 0 Thanked 12 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	my brain explodes everytime i look at subie oil systems and there cranks, forged light weight I beam rods and pistons with knife edged crank will be the order for NA, im looking for built 20valve revs, do subies eat oil pumps at all? im not very clued up on boxer tech,

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