building a forged 4g93T .....it begins now

[BMGTZ]

due to numerous overheats from a suspected blown head gasket. I will be replacing the engine in one of our cars.... 4g93T engine.

{not going to use the overheated engine}.......gee these will last forever with no water/coolant :blink:

the build will use the following parts.

wiseco pistons/rings .5mm os and K1 technology rods sourced from http://www.euroexportinc.com cost was around 950usd for both delivered and that was when the aussie dollar was 93 cents

Toyota 3sgte ARP head studs.....ebay

arp main studs are the same as a 7 bolt 4g63.....found that out by accident.....ebay

rotating assembly balanced....but didn't really need it....because they whole thing was 99.9% spot on!!....fluke

the crank is on std bearing size and just needed a polish. will use acl race main and big end bearings...these seem to be thicker than kings for the same engine and size..... got these at nason parts

new water pump ...nason

new timing belt and tensioners/idler...... nason

need to source a new oil pump.....any suggestions other than genuine? looking for increased oil volume and a quality part not a cheap price.

head gasket is a permaseal standard mls from a CE lancer sohc 4g93...these need one water hole drilled to match the std gasket. sourced from nason parts 85.00

the block has had all the usual machining...decked...align bored etc

nasons also have the late gen lifters....6 bux each!...so full set going in.

head will stay standard but have a recon.....it may need a shave...if it does then compression could be a bit high with these pistons at 9:1...then the head gasket being a tiny bit thinner than a previously used/ compressed one :unsure: if that is an issue I will get a bare head ...again from nasons 335.oo

no I dont work for nasons btw

I have a set of strange jap cams here....they look like an OE set judging from the casting marks... and haven't been reground but the last engine they were in had a lope at idle so i will chuck them in and see what they.

I will chuck up a few pictures as time permits

turbo....stock but may be changed to a 14b.....no it doesnt need a big laggy turbo to drive to and from work

 

[3zercrowd]

There are proper permaseal and genuine HG's for the DOHC heads for around the same price already out there without modifying the SOHC ones.

As for the oil pump there are the SOHC ones from the states that look the same, but nobody has had the balls to actually order and fit one to see.
I mean I couldnt see the difference between the DOHC and SOHC ones.

Sounds like a mean build!

 

[BMGTZ]

There are proper permaseal and genuine HG's for the DOHC heads for around the same price already out there without modifying the SOHC ones.

As for the oil pump there are the SOHC ones from the states that look the same, but nobody has had the balls to actually order and fit one to see.
I mean I couldnt see the difference between the DOHC and SOHC ones.

Sounds like a mean build!

I looked at the one on ebay and thought it looked the same....but no balls here either I will probably get a genuine one...spent to much to scrimp on an oil pump :blink:

 

[EVO-00X]

Brian, look for the Expo and Mirage 4G93 high volume oil pumps here: http://www.importperformanceparts.net/imports/toga_oilpumpsmitsu.html B)

 

[Qik-1.8]

turbo choice you should make it a gt30-76

as for pistons and rods you could go the spool rods and cp pistons if you hvent brought them yet( i know they sell them as combo)

 

[BMGTZ]

turbo choice you should make it a gt30-76

as for pistons and rods you could go the spool rods and cp pistons if you hvent brought them yet( i know they sell them as combo)

already bought the pistons and rods...regards the turbo...ahh pass

 

[GSRWRC]

I used a 4G92 MIVEC headgasket in my build (MD330500). The stock oil pumps are pretty good. I wouldn't even bother replacing it unless it was badly worn. I'd suggest eliminating the oil squirters to provide better pressure for the mains, as your pistons are forged there will be enough oil thrown off the crank to cool them.

Don't even bother wioth a 14B, straight to a 7cm 16G.

 

[youda]

I used a 4G92 MIVEC headgasket in my build. The stock oil pumps are pretty good. I wouldn't even bother replacing it unless it was badly worn. I'd suggest eliminating the oil squirters to provide better pressure for the mains, as your pistons are forged there will be enough oil thrown off the crank to cool them.

Don't even bother wioth a 14B, straight to a 7cm 16G.

screw that, you dont wanna be slower than 3zercrowd on a stock motor. forged bottom end go a td06 20g. or a ball bearing equivelent. you would be lookin at 650cc or bigger injectors though.

 

[BMGTZ]

screw that, you dont wanna be slower than 3zercrowd on a stock motor. forged bottom end go a td06 20g. or a ball bearing equivelent. you would be lookin at 650cc or bigger injectors though.

thanks for the info...but the turbo isnt going to be changed just yet. It just gets driven to work by my daughter. .....so why forge the engine you ask? well,because it isnt much difference in cost to do so....probably only 500.00 over buying just stock pistons

when it does get changed ...she will be happy with a 14b....or 16g and about 18 pound

 

[Smutt]

Hay... you guys are forgetting Brian has more than one GSR in the fam.., build your own the way you want your own buillt hehe..

I had to buy a new genuine oil pump for mine... ouchee.. pricey..

 

[BMGTZ]

View attachment 6902
only two valve reliefs....strange but I will cjeck piston to valve clearance anyway


View attachment 6901


View attachment 6900


View attachment 6899

evo arp main studs fitted to 4G93T block


View attachment 6898


View attachment 6897

K1 rod and box that shows their address

 

[Smutt]

Hmm, nice pics..

Here are some pics of the "custom" pistons I had made.... same same

Note: dish depth was increased by 1.5mm, lowering the compression ratio to 8.0 to 1

 

[BMGTZ]

Hmm, nice pics..

Here are some pics of the "custom" pistons I had made.... same same

Note: dish depth was increased by 1.5mm, lowering the compression ratio to 8.0 to 1

i see yours also has four valve pockets too.....only having two worries me a bit right now. but time will tell when I check the clearance.

 

[khubner1]

my stockers only have 2!

 

[BMGTZ]

rather annoyed today :angry::angry:I went to install the crank and found that when the guy wrapped it up after final polish he didn't spray wax on it!!

so now we have a rusty crank .........std size acl race bearings for sale!! crank needs 10/10 grind

lesson learned....trust no one

 

[Smutt]

F**k Brian!!! you haven't had ANY luck with Machinists/ engine reconditioners.. this is 2 times recently... man you must be pissed!!

psst...! "Hi-tech Cylinder Heads" in Malaga :thumbsup: :thumbsup: :thumbsup:

 

[DOUGMO]

rather annoyed today :angry::angry:I went to install the crank and found that when the guy wrapped it up after final polish he didn't spray wax on it!!

so now we have a rusty crank .........std size acl race bearings for sale!! crank needs 10/10 grind

lesson learned....trust no one

boooooooooooo, thats pretty crappy brian

 

[BMGTZ]

yep .....dont use tony at NOZTEC in welshpool. really anoyed about the crank and he is going to hear about it tomorrow trust me :angry::angry::angry:

 

[BMGTZ]

now looking for a new crank.....:angry:

 

[khubner1]

buy my old sohc engine and use the crank from it!