Evan's ST185 GT-Four Build.

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Evan's ST185 GT-Four Build.

Postby EvanP246 » Tue Sep 10, 2013 2:05 pm

Hi guys, my name is Evan and I'm from Barbados. I bought Flying Bajan's old GT- Four in May and have been in the process of restoring it. This is Dennis Heath's old car. I currently own a Gen 3 3sgte mkii MR2 and have also owned a gen 2 3sge mk2. It was only a matter of time before I bought a GT-Four haha. Here are some pictures after I gave her a proper detailing.

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The specs of the car are as follows (items in bold are parts that I have installed since purchasing):

1990 Celica ST185 GT-Four

Engine:
2nd Gen 3SGTE
HKS 264 Cams
HKS Cam Gears
HKS Valve Springs
Garrett GT2871R Turbo
KO Racing 3" Downpipe
HKS 3" Silent Hi-Power Exhaust
K&N Air Filter
Turbo XS FMIC
2.5" Intercooler piping
HKS SSQV BOV
Aquamist Water Injection System
Autronic SMC Standalone ECU
Blitz 630cc Injectors
Modified Fuel Rail (twin entry)
Malpassi FPR
Bosch Upgraded Fuel Pump
ARP Head Studs
HKS 1.6mm Head Gasket
Disabled and gutted TVIS
Twin Direct Fire Coilpacks (Evo III)
TRD Plug Wires
TRD IK24 Iridium Plugs
TRD Low Temp Thermostat
TRD 1.3 Bar Radiator Cap
Toyota Carlos Sainz Edition Radiator Fan

Drivetrain:
E150F Gearbox
ACT Street\Strip Clutch
C's Short Shifter

Suspension:
TRD Struts
TRD Springs
Whiteline Adjustable Rear Swaybar
Whiteline Camber Bolts

Exterior:
OEM Toyota Carlos Sainz Edition Conversion (bumper and bonnet)
Raybrig Clear Headlamps
Enkei RPF1 17x8 +35 Wheels
Bridgestone Potenza RE070 225/45/17 Tyres


Interior:
OMP Reclinable Bucket Seats
OMP Deep Dish Steering Wheel
TRD Shift Knob
HKS Turbo Timer
HKS EVC Boost Controller
Defi Advance BF Gauges
Pioneer Bluetooth Head Unit

The owner who had it for the past two years neglected it and it needed some tlc to get it back on its feet. Here are some pics after a some cleaning up.



I bought the car running on 2 cylinders, blowing vapour from the breather and in need of suspension and subframe bushings as well as re-upholstering the interior. The exhaust also has a few holes in it and was pretty beat.

The first thing I did was change the oil and filter (mobil 1 and oem toyota filter) then I replaced the exhaust with the HKS Silent Hi Power Catback installed a K&N Air Filter and changed the plugs to TRD IK24s (this got all 4 cylinders firing)

Then I installed new ball joints and a rear diff cushion. These were the main issues with the suspsnsion/chassis.


After inspection it turned out that my #3 cylinder was low on compression, caused by damaged rings. I decided to re-build the engine with forged internals. Many thanks to Scott from ATS Racing for supplying the parts and good advice.

I ordered an OEM full overhaul gasket/seal set
OEM Timing Belt
OEM Tensioner & Pulley
OEM Water Pump
ATS Racing High Volume Oil Pump
Wiseco (ATS Spec) Forged Pistons (.5 over)
Eagle Forged H-Beam Rods
ACL Race Bearings
Cometic MLS 1.2mm Head Gasket

They arrived last Friday:

Image

I have begun the process of dropping the engine and transmission.
Here is where I am now:

Image

I will have the engine out by tonight.

Other Mods that I will be doing include:

Trackforged 3" Midpipe
BC Racing BR Coilovers
17x9 +42 Rota Grid Wheels
GT4 Racing Polyurethane Bushings (complete set)
H&R Wheel Spacers

The plan is to rebuild and retune for around 20-25psi with water/meth injection. Looking for roughly 340whp.

Stay tuned for more updates!
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Re: Evan's ST185 GT-Four Build.

Postby Meenya » Tue Sep 10, 2013 5:55 pm

Welcome...I'm using 17x9" 30mm offset and 15mm spacer at the back fyi
Mike

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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Tue Sep 10, 2013 6:55 pm

Thanks! I have a narrowbody so I was planning to use a 5mm spacer in the front and a 12mm spacer in the rear.
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Re: Evan's ST185 GT-Four Build.

Postby Meenya » Tue Sep 10, 2013 9:01 pm

EvanP246 wrote:Thanks! I have a narrowbody so I was planning to use a 5mm spacer in the front and a 12mm spacer in the rear.


I don't know how those would fit on outside due to narrowbody but you might have issue at the back with effective offset of 30mm on 9".
This would depend on your negative camber and shocks/coilovers but for sure it would not work on my car with DMS coilovers...again fyi:)
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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Tue Sep 10, 2013 9:44 pm

Meenya wrote:
EvanP246 wrote:Thanks! I have a narrowbody so I was planning to use a 5mm spacer in the front and a 12mm spacer in the rear.


I don't know how those would fit on outside due to narrowbody but you might have issue at the back with effective offset of 30mm on 9".
This would depend on your negative camber and shocks/coilovers but for sure it would not work on my car with DMS coilovers...again fyi:)


I got my information from this post:
viewtopic.php?f=8&t=1327&start=645

DJS has a narrowbody fwd. I believe it's the same as my body. He ran a 17x9 +30 all around on bc coils. Do you think it would be any different with the awd drivetrain?
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Re: Evan's ST185 GT-Four Build.

Postby Meenya » Tue Sep 10, 2013 10:16 pm

I hope my attachment works...this is how 255/40/17 on 17x9" 12mm offset looks on my car. There is about -1.5 camber as well when this pic was taken and from what I have seen DMS coilovers sit lower than other brands.
But you can see that there is no way 30mm offset will work. Hope that helps.
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tapaupload0.jpg
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Re: Evan's ST185 GT-Four Build.

Postby underscore » Tue Sep 10, 2013 10:34 pm

EvanP246 wrote:
Meenya wrote:
EvanP246 wrote:Thanks! I have a narrowbody so I was planning to use a 5mm spacer in the front and a 12mm spacer in the rear.


I don't know how those would fit on outside due to narrowbody but you might have issue at the back with effective offset of 30mm on 9".
This would depend on your negative camber and shocks/coilovers but for sure it would not work on my car with DMS coilovers...again fyi:)


I got my information from this post:
viewtopic.php?f=8&t=1327&start=645

DJS has a narrowbody fwd. I believe it's the same as my body. He ran a 17x9 +30 all around on bc coils. Do you think it would be any different with the awd drivetrain?


he also has hugely stretched tires.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Tue Sep 10, 2013 11:57 pm

Okay, I see the clearance. It looks like it's your tyre that is causing it to be so close more so than your wheel.
After speaking with magnum I have decided to run a 5mm spacer up front to have an effective offset of 37 and a 25mm spacer in the rear to have a 17mm effective offset. I will be running 225/45/17 Potenza RE070s. Thanks again magnum!
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Re: Evan's ST185 GT-Four Build.

Postby 801Alltrac » Thu Sep 12, 2013 8:14 am

I will be doing the same plan for my motor and turbo :D
I want those DSM (very jealous)
Can wait to see your build :D
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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Fri Nov 08, 2013 4:12 am

So I got the engine out.

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Took off the cam gear cover and needed new pants:
Image
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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Fri Nov 08, 2013 4:18 am

Cams are way out of whack though, I will be dialing them in. I never really felt this turbo spool properly since #3 wasn't doing much. It should be a pretty different animal after all this.

Here is the culprit. I thought it was gonna be rings but it was the ringlands that cracked.

Here's the damage:Image

Luckily, the bore is fine.
Image


Speaking of bores, the block, head, intake and exhaust manifold and turbo are at the machine shop having work done.

That includes:

Bore block to 86.5 and hone
Port and polish head
Seat valves
Port match intake and exhaust manifold as well as turbo exhaust housing inlet.

Hoping to have the bottom end back by tomorrow. I'll start rebuilding Friday evening.

Turns out I need a clutch, the old one is showing signs of slipping. Too much torque. The solution is an ACT XTSS rated up to 510ft/lbs at the flywheel.

Eventually I want to upgrade to a 3076/ 5858 and try to make 400whp on pump and water/meth. :D We'll see how next year goes.
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Re: Evan's ST185 GT-Four Build.

Postby 88gt4DE » Sat Nov 09, 2013 1:20 am

Nice work and beautiful car .... keep us posted on progress !
Rob
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Re: Evan's ST185 GT-Four Build.

Postby CSAlltrac » Tue Nov 12, 2013 3:09 am

Im curious to see your numbers when all said and done. Im kicking around the idea of a 2871 for my next turbo. All Im wanting is around the 300 range for AWHP and TQ. Awesome find under the timing cover, surprises like that are always nice! Keep up the work and dont forget the updates!
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Re: Evan's ST185 GT-Four Build.

Postby EvanP246 » Mon Nov 18, 2013 11:42 pm

Thanks guys. I should be looking at around 340whp at 24psi on pump and water/meth injection. The machine work on the block and head is just about done so we'll be starting the longblock assembly next week. Stay tuned for updates.
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Re: Evan's ST185 GT-Four Build.

Postby 93cc » Tue Nov 19, 2013 12:09 am

looks great... looking forward to updates
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