Forged Shortblock - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

MSTiFK8R · 11-15-2012, 02:12 AM

was any of the non-strengthened engines blown yet?

we all saw crazy psi taken by the stock engine with ease

why forge then?

I know it's a matter of longtime reliability, but still... WHY?

TyperRspec789 · 11-15-2012, 02:17 AM

Quote:

Originally Posted by MSTiFK8R

was any of the non-strengthened engines blown yet?

we all saw crazy psi taken by the stock engine with ease

why forge then?

I know it's a matter of longtime reliability, but still... WHY?

Because Racecar.

Freeman · 11-15-2012, 02:40 AM

Quote:

Originally Posted by MSTiFK8R

was any of the non-strengthened engines blown yet?

we all saw crazy psi taken by the stock engine with ease

why forge then?

I know it's a matter of longtime reliability, but still... WHY?

"I know it's a matter of longtime reliability..." Lol you answered your own question

serialk11r · 11-15-2012, 02:58 AM

Increased rod length...what's the new rod length? Those stock pistons didn't look like they had much room to move the wrist pins up.

pixel67 · 11-15-2012, 04:54 AM

Quote:

Originally Posted by Freeman

"I know it's a matter of longtime reliability..." Lol you answered your own question

I think his question was has anyone blown up a stock engine yet due to mods.

Ravenlokk · 11-15-2012, 04:56 AM

I know who i'm calling if i blow my motor, or get a bad "CEL"...

Sportsguy83 · 11-15-2012, 07:10 AM

Quote:

Originally Posted by pixel67

I think his question was has anyone blown up a stock engine yet due to mods.

Right, but another question was "why forge" and that one he did answer it "for long time reliability"

Captain Insano · 11-15-2012, 07:18 AM

Quote:

Originally Posted by MSTiFK8R

was any of the non-strengthened engines blown yet?

we all saw crazy psi taken by the stock engine with ease

why forge then?

I know it's a matter of longtime reliability, but still... WHY?

There is a list of toasted engines in the CEL thread due to a crappy factory tune and other factors.
http://www.ft86club.com/forums/showthread.php?t=15577
So yes, these blocks can go even without modifications!! Obviously, if you get some detonation on a stock block, it's going to be alot more brittle than forged internals.

Don't you fret good sir. Some of the aftermarket fun will result in toasted blocks. It's inevitable. :-)

3MI Racing · 11-16-2012, 08:10 AM

Quote:

Originally Posted by MSTiFK8R

was any of the non-strengthened engines blown yet?

we all saw crazy psi taken by the stock engine with ease

why forge then?

I know it's a matter of longtime reliability, but still... WHY?

1.) Reliability as you stated

2.) It can be done, like I do on one of my EJ25 lines, and build it for a realistic power level and lighten the internals...instead of chucking beefy pistons and rods rate for 1200 hp into a car that might only run 500.

3.) This is more of to keep things in perspective but note of the boosted cars out there making good power, they are shop cars where someone is actually watching data like a hawk for various reasons. When you have Joe Blow Customer that comes up and wants the same power but doesn't have the same knowledge or keen eye on data, I suspect you'll see more popped engines from boost. The same thing already happened when the WRX and then STi's came to the market.

Quote:

Originally Posted by TyperRspec789

Because Racecar.

Or that

Quote:

Originally Posted by serialk11r

Increased rod length...what's the new rod length? Those stock pistons didn't look like they had much room to move the wrist pins up.

Always a possibility, although in this case, it is probably only done as technique to reduce reciprocating mass, like I do with the forementioned EJ25 line (Honey Badger).

-Micah

arghx7 · 11-16-2012, 12:13 PM

Longevity... well it depends how you look at it. If you are getting strengthened internals, you are looking at better protection against a catastrophic failure. Typically with these aftermarket pistons though you have increased blowby and wear on the cylinder walls.

In a heavily modified boosted application though protection from catastrophic failure becomes a higher priority.

dabocx · 11-16-2012, 01:34 PM

The stock block is making huge numbers on e85 or race gas.

On 93 octane i think the compression ratio might be limiting

No Limit Motorsport · 11-16-2012, 03:29 PM

HKS headgaskets anyone? Got these for a customer. Should have some nice pistons and rods for it on Monday

Also got him a Koyo Racing radiator

OrbitalEllipses · 11-16-2012, 09:45 PM

Quote:

Originally Posted by WolfsFang

Why is it open deck? If its forged should it be closed or atleast mid deck?

I believe most closed deck built Subaru boxers have run into overheating issues. Phil at Element Tuning would know a lot more about that; he champions the open deck block.

cf6mech · 11-17-2012, 08:56 PM

I'm in process to going forged, waiting on Aria's custom pistons right now which will also lower compression from 12.5 to 9 to one,....track car and yes its for longevity with FI.

11-16-2012, 03:29 PM	#26
No Limit Motorsport Senior Member Join Date: Jul 2012 Drives: 2013 DGM BRZ Location: Long Island, NY Posts: 2,266 Thanks: 355 Thanked 406 Times in 228 Posts Mentioned: 27 Post(s) Tagged: 0 Thread(s)	HKS headgaskets anyone? Got these for a customer. Should have some nice pistons and rods for it on Monday Also got him a Koyo Racing radiator Last edited by No Limit Motorsport; 11-16-2012 at 03:42 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Early proposal: FA20 with a FB25 shortblock, .5l more displacement anyone?	Kostamojen	Engine, Exhaust, Transmission	90	03-20-2022 06:05 PM
FBM/Arias Forged Pistons	FullBlown	Forced Induction	35	10-22-2012 07:05 AM
MMMMMM....forged pistons	jadewbj	Forced Induction	23	10-08-2012 06:46 PM
STi BBS Forged 18 x 8.5	ScottDRFT	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	3	09-10-2012 05:02 AM
FA20 Shortblock	Ishii Motors	Engine, Exhaust, Transmission	16	08-04-2012 09:28 AM

11-15-2012, 02:12 AM	#15
MSTiFK8R Senior Member Join Date: Jul 2012 Drives: BRZ WRB Location: Country of Bears Posts: 336 Thanks: 257 Thanked 264 Times in 82 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	was any of the non-strengthened engines blown yet? we all saw crazy psi taken by the stock engine with ease why forge then? I know it's a matter of longtime reliability, but still... WHY?

11-15-2012, 04:56 AM	#20
Ravenlokk Senior Member Join Date: Aug 2012 Drives: 2013 Raven FR-S Location: Vancouver, Canada Posts: 265 Thanks: 34 Thanked 68 Times in 47 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I know who i'm calling if i blow my motor, or get a bad "CEL"...

11-16-2012, 12:13 PM	#24
arghx7 Senior Member Join Date: Nov 2011 Drives: car Location: cold Posts: 599 Thanks: 72 Thanked 607 Times in 185 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	Longevity... well it depends how you look at it. If you are getting strengthened internals, you are looking at better protection against a catastrophic failure. Typically with these aftermarket pistons though you have increased blowby and wear on the cylinder walls. In a heavily modified boosted application though protection from catastrophic failure becomes a higher priority.

11-16-2012, 01:34 PM	#25
dabocx Senior Member Join Date: Jan 2012 Drives: Scion FRS Location: United States Posts: 1,267 Thanks: 564 Thanked 261 Times in 191 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	The stock block is making huge numbers on e85 or race gas. On 93 octane i think the compression ratio might be limiting

11-17-2012, 08:56 PM	#28
cf6mech Senior Member Join Date: Sep 2012 Drives: FRS Silver LS1 swapped. Location: Texas Posts: 752 Thanks: 621 Thanked 766 Times in 302 Posts Mentioned: 39 Post(s) Tagged: 2 Thread(s)	I'm in process to going forged, waiting on Aria's custom pistons right now which will also lower compression from 12.5 to 9 to one,....track car and yes its for longevity with FI.

User Name		Remember Me?
Password