Toms Turbo A (ma70) Wangan lover <3

[Beefy_Heafy]

Turbo A
1988 ma71 Supra "turbo a" variant.

















Purchased this a few years back and it has been on and off jackstands ever since. Im constantly upgrading changing and breaking things. So far ive rebuilt the engine twice for bearing failures caused by oil starvation from silly issues that have been corrected and also have rebuilt the r154 due to 1st gear thrust washer failure and subsequent chewing of the gearset.

mods list!

Engine
7m-gteu
Nitrided 6m crank
Balanced rotating assembly
Eagle rods
9:1 CR Arias forged pistons (20thou or .5mm oversize)
Running standard camshafts and standard cam wheels.
BC 1mm oversize stainless valves with 3 angle grind
BC valve springs (thick ass single springs)
BC titanium retainers
Port matched manifolds and a slight port polish with good surfacing
Cometic MLS head gasket 1.3mm (total cr is about 9.2:1 ish)
ARP head studs, main studs, and rod bolts
HKS SUPER POWER 3 layer foam air filter
fabricated steam pipe exhaust manifold with 6 into 1 merge collector
Garrett gt3582r turbo with .82ar rear housing and internal wastegate with 8psi actuator
all braided ss lines for turbo oil and water
fabricated stainless 3 inch dump pipe into 3inch stainless exhaust with high flow cat and some random cannon type muffler
Turbosmart 1.5inch plumb back bov
HKS fuel cut defender to prevent boost cut
Apexi AVC-R boost controller, currently running 1.0BAR or 15psi
hi flow thermostat
koyo racing radiator
mishimoto twin thermo fans with shroud
relocated coolant reservoir to back passenger corner of engine bay.
home made 3'' stainless intercooer pipes. Oh and massive 4" intake pipe sexxaayy
600x300x80 HDi fmic with 3" inlet and outlet
Ron R mid runner ffim
Sethron 90mm Throttle body retaining standard tps using eccentric throttle pulley
heat shielded intake manifold gasket
deleted A/C
wesbeech altenator bracket dropping alt down to where ac used to be
oil system running via permacool filter relocator -> oil filter -> permacool oil thermostat -> big ass 19row earls oil cooler -> Moroso Accusump with on off switch controlled in car -> engine. All through -10 aeroequip push lock hose and fittings.
running castrol edge 0w-40 oil.
bearing clearances set to .0025inches

Fuel System
255lph intank walbro
pulp
injector duty still good

Driveline
Lightweight flywheel (Supposedly OS gilken)
Exeddy semi cushion brass button clutch.
Short shifter (unknown brand supposedly cusco)
Marlin crawler shifter bushings
Redline mt90 gear oil in standard r154 transmission (freshly recoed)
TRD LSD using reccomended weight redline oil

Sussy
whiteline front swaybar
cusco front strut brace and ebay rear strut brace
koni yellow shocks and selby springs courtesy of IJ

Brakes
ARZ 6 piston 13'' front brake kit (willwood calipers rotors and pads)
ARZ 4 piston 12.9'' rear brake kit with handbrake (willwood calipers rotors and pads)
braided lines
dot5 fluid

Interior
Momo race 300mm wheel
Cusco handbreak lever
recaro seats from jza70 so huggy
greddy electronic boost, oilpressure and water temp guages
autometer electric oil temp, af ratio (displayed in a red yellow green arch of lights rather than a number) and voltage guages
greddy turbo timer
crazy awesome alarm system
some stereo crap who cares
battery relocated to boot!

Rolling on 17inch work equip wheels with dunlop sport sp 200 rubber 255 on rear and 235 on front. mmmm grippy, and expensive

The hardcore engineering stuff like block and head surfacing, honing bores, setting clearances, line honing etc taken care of by my engineer Craig at express engine reconditioners in Toowoomba and fabrication of exhaust manifold and dump pipe done by Shannon at MTQ engine systems also in Toowoomba. Shannon and Craig are both awesome at what they do and have answered (endured) all of my questioning and nagging like champions. All the assembly and research was done by yours truly along with A lot of help and technical trickery learned from my mate beau who works as a mechanic in town who also toiled away long hours in the garage with me.. thanks beau also beau is a badass welder haha

I think thats the lot
for now

phase four will involve aftermarket ecu (undecided as to which)
and a massive fuel system overhaul (surge tank, bosh 044, 1000cc injectors, afpr and all new fuel lines)
i will build fuel system in mind for even more expansion down the track to accommodate a 2nd Bosch 044 and twin entry rail for e85 tuning!

MOAR PICTURES

this is of the work im doing to the car currently. invoving the big brakes and forward facing manifold conversion.




































The engine bay piccies arent quite up to date but ill be sure to post more pictures soon.

Feel free to comment and ask questions in thread etcetc

[beauboostr]

WIN!!!

[dr1ft-pig]

this thing is awesome!!! good to see someone persisting with a 7m

[Beefy_Heafy]

haha thanks. I quite like the 7m i think its a fine engine. It seems to have developed a bad reputation.

[dr1ft-pig]

they really do have a bad rep, haha just for eating HG apprently the torque specs are too light from factory which is the reason for it

my mate zac has 7mgte ma61 drift car and it goes fine for him jz for me though

[Beefy_Heafy]

yeah that head gasket thing would be the reason. The factory specs are shit. i don’t think there is anything actually wrong with the hardware even. its just not tight enough from factory. either way, metal hg and arp studs definitely solve the issue.

at the end of the day. u can get more out of a 2jz. but for my power goals (responsive 500rwhp) either is fine IMO

ill give ur build threads a read when i get home from work

[dr1ft-pig]

yeah that would be it then, i was also told that the head bolts were spaced too far apart or something??? do think its a load of shit though as there is only really one spot u can put them, anwhere else and u get close to bores etc

500hp 7m will be impressive man im making 400 with bolt ons,ecu and injectors

[Beefy_Heafy]

freaking excited for matsuri. i hope to get the turbo A out there. but ill be sliding the red dragon

[ecko]

Get onto toymods mate A70 thread there will love you

[Beefy_Heafy]

nooo not another forum to watch hahaha... okay thanks ill check it out!