Peer Review! -ST185 GT4 Modification

[areayeforty]

Hey guys!

I am coming into the market for an St185 GT4 and have done a bit of research into how to modify it up to around 300hp. I have it organised into stages. If you could please submit changes or advice it would be most appreciated.

So here it is.

*Kudos goes to ViPeR_NiPPleX & Billzilla for their help thus far*

*I've been getting a lot of question to do with this car's purpose, it will be my daily and for track use when I feel like it, and yes, this much power is necessary*

Stage 1: Handling/Diagnostics/Visual
- ST205 Shifting Lever
- Limited Slip Differential
- Heavy Duty Clutch
- Heavy Duty Brakes
- Front & Rear Strut Braces
- Coilovers
- Rims (Enkei P1’s) & Grip Rubber
- ST184 SX Bonnet, Badges & Instrument Panel
- Boost Gauge
- Oil Pressure Gauge
- Alarm & Immobiliser

Stage 2: Bolt-on power
- 3” Turbo-back Exhaust System
- 4 – 2 – 1 Manifold w/ Downpipe
- High-flow Catalytic Converter
- Remote-controlled Street/Track muffler
- Cold Air Induction Kit (Sealed Airbox)
- Twin Power Ignition Amplifier Kit
- Performance Spark Plugs w/ Larger Diameter Leads
- HKS GT2835 Roller-bearing Turbocharger
- Front Mount Intercooler
- External Wastegate
- Plumb-back Blow Off Valve
- 550cc Fuel Injectors
- 255L/h Fuel Pump
- Oil Cooler
- Adaptec ECU
- Replace hoses w/ relevant High-flow Models & Heat Wrap
- Turbocharger Heatbag.

Stage 3: Internals
- High-rise Camshafts
- Vernier Cam-gears
- Lightened Flywheel
- Port & Shave Head
- Forged Pistons & Rods
- Performance Piston Rings
- Stainless Valves
- Metal Laminated Head Gasket
- Performance Valve Springs

Also, feel free to simply tear it apart and build me a new one...

Thankyou so much in advance for your replies.

Nick.

[Billzilla]

If you could please submit changes or advice (especially regarding giving ECU rights to the Microtech LS8

<snip>

- Port, Polish & Shave Head
Nick.

Use an Adaptronic ECU and do not polish the ports, you will lose power.

[areayeforty]

If I use the Adaptec ECU what seperate electronics will I need? Does it have laptop interface? In built fuel-cut and top speed defenders? Roger on not polishing the Head. Thanks a bunch.

[Billzilla]

If I use the Adaptec ECU what seperate electronics will I need? Does it have laptop interface? In built fuel-cut and top speed defenders? Roger on not polishing the Head. Thanks a bunch.

Not sure, but it'll run everything quite well.
Yes it talks to a laptop.
Yes it'll run any fuel and speed you like.

[areayeforty]

Thankyou for all your advice, any specific ECU you'd recommend?

[Billzilla]

Thankyou for all your advice, any specific ECU you'd recommend?

As mentioned, use an Adaptronic. They're fairly trick these days.
http://www.createphpbb.com/phpbb/ind...rum=adaptronic

[areayeforty]

Sorry, I meant any specific Model.

[Billzilla]

Sorry, I meant any specific Model.

Just get the latest one.

[thechuckster]

there is only one model - the firmware (and sometimes hardware) gets revised as the ECU is further developed.

Read from here: http://www.adaptronic.com.au/tech.php

[areayeforty]

If that's the only thing getting commented on then I understand the rest of it to be A-OK?

[HAVABEER]

i'm just curious as to where you got your bhp figures from? (not saying that in a bad way)

just coz you have it saying your gonna get 10BHP just from adding a CAI?

[areayeforty]

The amount is cumulative, the figures i'm getting are from someone who's done this (almost) exact mod and dyno tested each step, so I'm going from their results (I don;t intend this to be gospel). So the final HP is the total amount gained from the Mods to that stage.

[ViPeR_NiPPleX]

That's a lovely shopping list. But what you have yet to state, is what the hell do you want from this car? Is it to be a sporty daily? A track weapon? A drag queen?..

Not in any of those stages has tyres or rims been mentioned. In stage '3' there is FCD and FPR listed, but unless the stock fuel pressure regulator is a limit to rail flow, it shouldn't be considered. A fuel cut defender is only to fool the standard ecu in outputting it's allowable maximum injector pulse rate. So with an aftermarket computer, there is no need for one. You haven't listed tuning either, which is a must.

If you are after a particular power figure, i'd highly suggest building the motor with the power figure in mind and add supporting systems once that is determined. There is no reason for having an oil cooler if the oil isn't getting cooked, especially on a near standard motor.

I've now forgotten what I intended to say next, but uhh.. I'm tired

[UMP-man]

boost gauge! move it up to stage1 as the stock one is absolutely useless. i'd also do the turbo+fmic before the ECU upgrade.

[areayeforty]

Well, I didn't know a mission statement was needed on a build. But It'll be my daily driver taken to the track for a fang when I feel like it. At the end of the build I want it to look like a plain Celica SX.

Rubber will be upgraded and rims will be Enkei P1's. (White 5 spoke numbers)

At the beginning of my post I said this was a guide to get it to around 300hp, there's your power goal. I want to do the stages as I can afford them and see where it goes from there. It's because i intend to get to the final stage that I'm putting all of the heavy duty items in first.

With what's been said I'll update the list in the original post.

Obviously I'm new to this thing. What do you mean by "tuning"?