throttle body 4g63t or 93t

70mm throttle body for 4g63 used this time. how ever it has some advantages and disadvantages.

there is no bypass air to compansate idling.i have to adjust the throttle cable stop screw. by doing it also will change TPS angle.i have to make sure
this TPS in a correct location. thank goodness that microtech be able to detect by looking the illumination of yellow light.
TPS retaining screws have to changed to a smaller one.the standard screw unable to fit in as the holes at new throttle body was a little bit small

this hole used to hook with my throttle cable. but it was way too small to fit it on. so i have to drill and largen the hole
works throttle body has come with a remote stapper motor however i'm not going to use it.

bore has been largen for better flow.

oil feed line for turbo

Ensure your feeding line not less than 3mm inside diameter. this is to ensure positive pressure supply from oil pump

In my case i removed oil to water cooler that shown in the picture. in order run this system, there is an outlet from water pump that require to be closed


Instead of using normal feeding oil line from cylinder head, i had change it from other source. which actually taken from oil filter. i've made some modification on the sandwich plate of oil filter, largen the hole that suppose for oil pressure sensors. this mod is to allows more oil to be supply to turbo since it runs on journal bearings. suit for high pressure at high rpm. Those who are using ball bearings, no worry because they need fewer oil to be supplied due to less bearing contact area.

Custom Exhaust Magnifold

Exhaust magnifold aka banana is customed by

GME racing from sg buloh. Made from difference material how ever it is still a stainless steel

this type of stainless steel is less prone to corrosion and much more thicker in size. if i'm not mistaken more than 3mm. that's the reason why it looks a little bit bigger and beefy

td05 flange with additional mounting.

wastegate external from turbo smart 38mm. make sure it is originals and can be confirmed by looking at the outlet valve which is seramic coated to withstand high temp.

bullseye s256

GT3076(left) vs BW s256

Hi...I would like to say thanks to synapse.turbo.com ,and credits to Mmailto:Morgan@synapsemotorsport from honda-tech.com who shares this most useful info to us all. The above pictures are the differences between Borg warner S256 and Garrett GT3076. S256 has bigger shaft dimension to withstands the centrifugal force during high RPM. eventhough GT30 has 1mm bigger inducer, how ever s256 has bigger exducer which 85.95mm while GT is 76mm. ETT stand for extanded tip technologies which introduced by Borg warner giving more spooling and compression capabilities, some other people say better than ballbearing. S256 is journaled bearings providing user to rebuild or upgrade to another stage like installing billet impeller or compressor. U might also change to bigger inducer like the one u find on s258 series.

Borg Warner S256: .50 A/R compressor housing Compressor Inducer 56.0mm Compressor Exducer 85.95mm Turbine 75-76mm (odd number of blades couldn’t put a caliper directly on it just a ballpark figure)Turbo with .70 A/R 4 bolt housing: 21 lbs Turbo with .85 A/R 6 bolt housing: 23.2

GarrettGT3076r Compressor Inducer 57.0mm Compressor Exducer 76.14mm Turbine 59.90mmTurbo with .63 A/R 4 bolt housing 15.0 lbs.

i would recommed for u guys to have a look at his forum site becouse he shows both turbo tested on his own vehicle http://honda-tech.com/showthread.php?t=2220363

Now I would like to share mine s256 but non ETT. I brought it on january this year but under certain circumstances I had delay the installation to my engine. In order to fit it in I have to make few changes examples new exhaust magnifold, oil feed line, intercooler piping, radiator fan and down pipe.

this picture shows modified radiator fan. i have cutted at some area near to turbo housing it's a DSM flanged

Sorry coz this time I forgot to take picture before install it.

bellows are the pictures that show the different before installtion. this exhaust magnifold was the flage from old TD05 turbo that previously been used. different in dimension caused me to custom new exhaust.

can't fit in...how ?

to4b vs TD05

This pic taken early this year at TONG turbo. that time i was thinking of grabbing it for my engine. it was T04b turbo journal bearing hybrids with TD05 flange. i belief it is made from chaina even though being denied by the supplier. lets take a look when i put it side by side to TD05 16g. the housing looks a bit bigger. but end of the day i choose bullseye, preferable and more precise to my engine setup.

4g93t GSR cylinder block

I have done 2 unusual things and rarely made by someother people to the engine block..

1) zinc chromate coating (green colour) for surface protection than later srayed with grey colour


2)I had replaced all the water jacket with alluminium alloy plate as picture belows.the benefit of doing it is, it will last longer and reduce corrosion that leads to leaking and high engine temperature...

after installation of piston and con rod. ensure for free of rotaion.



this is what i forgot to mention in the early post. the arrow shows piston skirt that has been grainded. without grainding it will hit the crank .

installing the oil pump and wiper seal

anther one more thing to mention is.. the arrow show CA18 bearing key, which is different in location compared with original GSR. key for GSR is at the edge of the big end. so make sure you buy CA18's conrond bearing to fit in your engine.

4AGZE piston (supercharger) on 4G93t engine

i use a set of piston from 4AGZE engine. it is originated by ART and i brought brand new. these piston claimed as semi forged type by toyota. may be "semi forged" meaning for the ceramic coated on top of the piston.but for sure the hat coated is for more durability. compression ration is 8:1 on 1.6 liter engine..when u fit in to 1.8 it will increase the ratio higher but i don't know how much it goes. piston pin size is 20mm with retaining ring and it does't require a push or press machine to assemble the piston and conrod. what are the important things before installing this piston to your GSR..?
piston skirt should be grainded. this pisture was taken before cutting. take a look at the skirt, it will hit between your crank counter weight. i've seen some foreman have not done this correctly and result to engine failure

cut the piston as pictured belows

some people haven't cut the piston skirt and some cut it streight flat.It's the wrong way to do it cause reduction in reliability of your engine. why? you must leave a few tail like a tri-angle in the picture. this is to maintain 81mm of piston dimension. 81mm is actually taken at the skirt and not from top of the piston. try to measure using vernier caliper, u'll find that the top one will less than 81mm.

let me show you the different from left GSR, 4AGZE and CA18 piston.

CA18 83mm in size. another picture is GSR piston and arrow shows that oil feeder path line while compare to 4AGZE is just streight and flat which alot more oil can be feeded through the piston wall

Brand new original pistons frm 4AGZESupercharger -Piston original ART Toyota factory Made in Japan100%-Size 81mm & 81.5mm only. 82mm not in production-piston with ceramic coating and made ofalloy grade AC8a Grade for durability-2 types 8.9.1 compressed low flat type &8.0.1 super low compression type -Suitable for turbocharged Toyota 4age16&20v,Proton/Mitsu 4g91/92/93t gsr,HondaB16/18,Ford Lynx RS,etc-Original & complete kit with 20mm pins, clipsand rings NPR/RIK Japan