4g94 Forged internals rebuild steps by step guide
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Evolved Member
Joined: Oct 2010
Posts: 522
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From: Montreal, Québec
Hey man im sorry i have not been on the forums for a while...i now have an evo 9 AEM EMS V2 and the car is making 242whp/306wtrq on a mustang dyno at 16 psi peaking at 18. Im now waiting for a custom turbo manifold to be made so that i have the runners perfectly aligned with the head instead of the evo 9 manifold and i just installed a MAC 3 way boost solenoid. Im hoping to make over 250whp/310wtrq on the dyno when spring comes!
Last edited by marcouxa1; Jan 9, 2019 at 01:41 PM.
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Joined: Nov 2015
Posts: 29
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From: Chicago
Whats the part # for the K1 Rods.
Because everybody says you have to grind off the oil galley? Isn't that a indication that the parts are not even right? Not trying to sound like a dick its a serious question.
I am honestly trying to avoid the whole shaving down cylinder 4 so I am wondering if people ordered the right K1 Rods. As there catalog shows 2 options but one is 4G93 under the 4G94 tab.
If anybody has part numbers that be awesome! Or if anybody has installed other connecting rods & avoided shaving down the inside of there engine block that be dope too!
Because everybody says you have to grind off the oil galley? Isn't that a indication that the parts are not even right? Not trying to sound like a dick its a serious question.
I am honestly trying to avoid the whole shaving down cylinder 4 so I am wondering if people ordered the right K1 Rods. As there catalog shows 2 options but one is 4G93 under the 4G94 tab.
If anybody has part numbers that be awesome! Or if anybody has installed other connecting rods & avoided shaving down the inside of there engine block that be dope too!
Nice! I haven't been on this forum for years but I've been turbo since about 2010 and its been driving great but it's time to go a little faster. Its been making about 275whp and trapping 114 in the quarter mile on a stock motor too . Going to built it with the same rods and pistons but im shooting for 400ish whp.
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Joined: Oct 2021
Posts: 5
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From: Charlotte NC
Nice! I haven't been on this forum for years but I've been turbo since about 2010 and its been driving great but it's time to go a little faster. Its been making about 275whp and trapping 114 in the quarter mile on a stock motor too . Going to built it with the same rods and pistons but im shooting for 400ish whp.
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Joined: Mar 2024
Posts: 1
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From: Dubai
Hello.
Very informative thread OP.
I am in the same boat and will be building a 4g94 engine from the same car for boosting by end of this year. I have couple of question for OP
1). How is the setup going so far? Any issues?
2). How much power this is making and at what boost.
3). Are you using same transmission with upgraded clutch?
The plan is to make healthy 500-600hp and later on do the awd setup from outlander(I am yet to do research on that setup) & use the parts from 4g94 only instead of going 4g63 route
Very informative thread OP.
I am in the same boat and will be building a 4g94 engine from the same car for boosting by end of this year. I have couple of question for OP
1). How is the setup going so far? Any issues?
2). How much power this is making and at what boost.
3). Are you using same transmission with upgraded clutch?
The plan is to make healthy 500-600hp and later on do the awd setup from outlander(I am yet to do research on that setup) & use the parts from 4g94 only instead of going 4g63 route
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Joined: Jul 2025
Posts: 2
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Do you have link for these pistons?
do you have the li k for these pistons
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
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