4g94 Forged internals rebuild steps by step guide
Feb 23, 2015, 06:56 AM
#31
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I dont have any cams and it was running rich cuz it was idle learning since it had not started in almost 6 months with no battery....now its running in the 16 afr at idle
Feb 23, 2015, 02:21 PM
#33
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I will keep my current map for the break in period and then adjust the afr to run leaner since everything is forged now....running leaner will probably help me not maxing out my injectors at 15-20 psi.
Jan 28, 2016, 05:10 PM
#34
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Anyone rebuilt their engine yet since i did mine? I just baught a set of DW 750cc WRX injectors because the WRX 440cc are maxed out at 15 psi running in the 95%+ duty cycle!
Feb 12, 2016, 11:11 PM
#35
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I am in the process of rebuilding mine. I had a weird ticking sound that I couldn't figure out and it was intermittent. Then my timing belt snapped and bent some valves. Upon pulling the head I found a chunk of #4 piston missing and marring of a couple Pistons and on the head. So I found my ticking problem lol. I'll be putting forged stuff in it.
Feb 18, 2016, 11:57 AM
#36
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Nice to see that someone is doing a forged internal 4g94! If you need help just Pm me im ready to answer your questions....and also if you buy k1 rods you will have to grind the inside of the engine block for clearance but dont grind too much since it's an oil gallery on the other side.
Feb 18, 2016, 07:03 PM
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Nice to see that someone is doing a forged internal 4g94! If you need help just Pm me im ready to answer your questions....and also if you buy k1 rods you will have to grind the inside of the engine block for clearance but dont grind too much since it's an oil gallery on the other side.
Feb 29, 2016, 02:28 PM
#38
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Yea the oil gally is on the engine block on the inside but you dont want a hole in there or your oil pressure will not build up!
Mar 18, 2016, 08:38 AM
#39
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Ok a quick question. I also am using the arp head studs listed here. Being that these are not torque-to-yield bolts would we still need to do the tightening sequence for the engine based off the oem tty head bolts? I.e. ~15Ib/ft +90* +90*
Last edited by Complink; Mar 18, 2016 at 12:44 PM.
Mar 19, 2016, 02:28 AM
#40
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According to ARP instructions for these 10mm studs to achieve 200000psi yield strength, they require three steps up to 60Ib/ft. So 20-40-60 Ib/ft. Just curious if anyone is pretty knowledgeable in this area.
Mar 19, 2016, 04:34 PM
#41
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Ok so initially I torqued them to oem specs but I decided I'd rather get them closer to what arp recommends. I backed them off and retorqued them to 15-40-65. From what I could find out, arp rates their studs at 75% of their yield point. So in essence, 80ft pounds would be the 100% yield point on these studs that you don't want to surpass. So after I do a heat cycle I think I'll do one more torque to 70 just for safe measure. Torquing them to 65 didn't quite do a full 180* so I'd be curious to see what the oem torque actually comes to.
Mar 9, 2017, 06:51 AM
#43
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Hey guys this winter i took my blown evo 8 turbo out of my car to replace it with an evo 9 turbo. While i was there i decided it would be the perfect time to rebuild my engine block with forged internals. I taught some of you guys would like to see a complete engine build thread for the 4g94 with a step by step guide including torque specs and prep work. I AM NOT RESPONSIBLE FOR ANY PROBLEMS RELATED TO THIS ENGINE BLOCK THREAD. I sent my engine block to a machine shop today and i will get it back in a few days but here's what the block is getting:
Parts:
-Cp forged pistons 82mm (3.228''), 0.50mm (0.020) oversize
-K1 forged connecting rods
-Arp head studs (part#203-4204)
-Gates racing timing belt
-Rebuild head
-Mishimoto oil sandwich adapter w/ thermostatic switch for oil cooler
-Amsoil 10w30 Dominator synthetic racing oil
-Connecting rod bearings
-Main bearings
-Beck/Arnley water pump
-Beck/Arnley injector o-ring kit
-Oem timing belt tensioner and spring
-Oem thermostat
-Oem head gasket
-Oem front and back crank seals
-Oem dipstick tube
-Oem lower oil pan
-Oem exhaust and intake manifold gaskets
-Oem EGR gasket
-Oem throttle body gasket
-Oem oil filter
-Oem coolant pipe o-rings
Labor:
-Engine block acid bath 50$
-Engine block sonoflux 50$
-Resurface the engine block deck 95$
-Cylinder boring 0.50mm (0.020'') oversize 140$
-New frost plugs 68$
-Piston rings gapped to spec for a turbo application 125$
-Polished crank 50$
-Rod to pin fitting 30$
-Engine block internals balanced 225$
Other random parts:
-Evo 9 turbo up from an evo 8 9.8t turbo
-Mishimoto 19 rows oil cooler
-Progress 19mm rear sway bar
-Glowshift oil pressure gauge
-Custom hockey puck urethane engine mounts
-Obx silicone radiator hoses
I will keep this threat updated as i get the engine block back from the machine shop! For now here's a few pictures of the parts:
Attachment 238782 Attachment 238781 Attachment 238783 Attachment 238784 Attachment 238785
Parts:
-Cp forged pistons 82mm (3.228''), 0.50mm (0.020) oversize
-K1 forged connecting rods
-Arp head studs (part#203-4204)
-Gates racing timing belt
-Rebuild head
-Mishimoto oil sandwich adapter w/ thermostatic switch for oil cooler
-Amsoil 10w30 Dominator synthetic racing oil
-Connecting rod bearings
-Main bearings
-Beck/Arnley water pump
-Beck/Arnley injector o-ring kit
-Oem timing belt tensioner and spring
-Oem thermostat
-Oem head gasket
-Oem front and back crank seals
-Oem dipstick tube
-Oem lower oil pan
-Oem exhaust and intake manifold gaskets
-Oem EGR gasket
-Oem throttle body gasket
-Oem oil filter
-Oem coolant pipe o-rings
Labor:
-Engine block acid bath 50$
-Engine block sonoflux 50$
-Resurface the engine block deck 95$
-Cylinder boring 0.50mm (0.020'') oversize 140$
-New frost plugs 68$
-Piston rings gapped to spec for a turbo application 125$
-Polished crank 50$
-Rod to pin fitting 30$
-Engine block internals balanced 225$
Other random parts:
-Evo 9 turbo up from an evo 8 9.8t turbo
-Mishimoto 19 rows oil cooler
-Progress 19mm rear sway bar
-Glowshift oil pressure gauge
-Custom hockey puck urethane engine mounts
-Obx silicone radiator hoses
I will keep this threat updated as i get the engine block back from the machine shop! For now here's a few pictures of the parts:
Attachment 238782 Attachment 238781 Attachment 238783 Attachment 238784 Attachment 238785
I have a ton of questions haha. And haven't found anyone else doing anything to an 06, I've got an 06 lancer fwd with the 4g94
Mar 9, 2017, 02:27 PM
#44
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Mar 9, 2017, 02:53 PM
#45
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