Full Blown 521hp Stock Motor @ 20psi

[carbonBLUE]

Originally Posted by TouchMyHonda

I have a feeling that 8.5 wouldn't be a problem at all with springs an retainers.

dont forget accelerated is pushing 9k rpms on the stock valve train at 400+ whp

[Kids Heart]

Has one blown up yet? Besides D1 HKS

[Opposed]

Originally Posted by Kids Heart

Has one blown up yet? Besides D1 HKS

Not from boost that has been reported yet...

[jkonquer]

so im guessing this FA20 is a far better engine than a ej20 or 25?
WRX engine will never get anything close to that in a stock form, not to mention such a high rpm.

[VSGTS14]

Originally Posted by jkonquer

so im guessing this FA20 is a far better engine than a ej20 or 25?
WRX engine will never get anything close to that in a stock form, not to mention such a high rpm.

seems like it's finally better built. the EJ has been around forever. subaru had to at least replace it with something stronger. 06 and up just seemed so problematic.

don't forget, 04 and 05 sti's were holding 400-500whp for a while on pump gas on the stock internals. eventually the boost killed them.


it's all a matter of time. the FA will hold, but not forever. i give them a couple thousand miles before they pop.

[Tansey86]

Originally Posted by jkonquer

so im guessing this FA20 is a far better engine than a ej20 or 25?
WRX engine will never get anything close to that in a stock form, not to mention such a high rpm.

The ej20 and ej25 dont have this compression thats why. If you drop the compression down to where the wrx motor is, youd see the same numbers, or similar.

[subatoy]

Originally Posted by Tansey86

The ej20 and ej25 dont have this compression thats why. If you drop the compression down to where the wrx motor is, youd see the same numbers, or similar.

What?! the high compression ratio is the worst case for the PSI this car is running. so this car holding that amount of boost is really impressive.

[Tansey86]

Originally Posted by subatoy

What?! the high compression ratio is the worst case for the PSI this car is running. so this car holding that amount of boost is really impressive.

I was talking about why the FA20 is making more power in stock form. I agree its very impressive and actually very surprising, but they are using e85, I doubt this car would last more than a few pulls with 93 and more than 10psi

[Opposed]

Originally Posted by subatoy

What?! the high compression ratio is the worst case for the PSI this car is running. so this car holding that amount of boost is really impressive.

He meant power wise. An EJ20 with 20 lbs of boost will make less power than the FA20 because it has lower compression from the factory. Part of the reason the FA is making good numbers on specific boost levels is because of its higher compression. Think about it though, Subaru knew that it was going to run high compression with direct injection. And in order to make a production engine withstand years and miles of running with that high of compression and high RPM's they had to have made it strong for those reasons alone. Kind of like how diesel engines are built strong because of the hight compression they have to withstand.

[Tansey86]

Originally Posted by Opposed

He meant power wise. An EJ20 with 20 lbs of boost will make less power than the FA20 because it has lower compression from the factory. Part of the reason the FA is making good numbers on specific boost levels is because of its higher compression. Think about it though, Subaru knew that it was going to run high compression with direct injection. And in order to make a production engine withstand years and miles of running with that high of compression and high RPM's they had to have made it strong for those reasons alone. Kind of like how diesel engines are built strong because of the hight compression they have to withstand.

Thank you for understanding.

[subatoy]

Originally Posted by Tansey86

I was talking about why the FA20 is making more power in stock form. I agree its very impressive and actually very surprising, but they are using e85, I doubt this car would last more than a few pulls with 93 and more than 10psi

why would 93 oct. make it worst for this engine to hold boost?

[Tansey86]

Detonation. The octane rating in e85 is much higher(like race gas) and allows you to run higher boost on higher compression without detonation. Thats why companies are making low compression pistons so not everyone needs to run e85 or race gas to have high psi high power builds

[Ranatsu]

Originally Posted by Calum

True, but you can also get a good idea of how much power they are making by measuring how much power they are making, with a dyno. Oh wait... :happy0180:

Man, I'm really in a mood today. I hope this comes off as funny sarcastic not ****ish sarcastic.

Right, but my point was that dyno numbers can be easily manipulated. You can't change what a car runs in the 1/4.

[Opposed]

Originally Posted by Ranatsu

Right, but my point was that dyno numbers can be easily manipulated. You can't change what a car runs in the 1/4.

Beside weather, and driver, and altitude, and tires...