Single turbo conversion advise needed

[Crash Bandicoot]

Hi everyone,

 

I’m just about to start the single turbo conversion on my 1997 white tt6 facelift switchover (non VVTI).

 

What I’m fitting:

 

HKS t04z hybrid single turbo,

HKS T4 exhaust manifold,

HKS GT wastegate,

HKS 3.5” downpipe,

Custom screamer pipe (currently to side exit, may plumb back into exhaust)

Sard 800cc drop in side feed injectors,

Apexi power fc ecu with hand commander,

Apexi 3 bar map sensor,

Walbro 450 fuel pump,

spec 3+ clutch.

 

What’s already fitted:

 

large front mount intercooler (need to measure size,

bov (unsure of make, not sequential),

boost controller (unsure of make, will update),

turbo timer (unsure of make, will update)

uk brakes freshly rebuilt,

2 piece enkei 19” split rims Yokohama 285 rears and 235 fronts (25mm spacers on fronts),

drag spec titanium 4” exhaust cat back system,

Double de-cat,

Large ally rad.

 

Once all fitted, the plan is to take it to Paul whiffin, hopefully early next year for mapping.

 

Is there anything that’s missing?

I will update with things I would like to question as I go along and may start a build thread if I have time.

 

A few things I would like to question first off:

 

Anything else Roth doing while the stock twins are off (decluttering anything)?

Fuel pulsation dampener bypass, a good idea?

Is it worth replacing the thermostat when the twins are off as it’s easier then?

Is everything there to feed from in the sense that the turbo is also water cooled?

Does anything need modifying that I can do/but prior to starting the build?

 

 

Link I would like if anyone has them:

 

Removal of the stock twins?

Single turbo conversion step by step/ guide?

 

I have researched a lot, but it seems as a lot of the guides are around 10 years old now and most links from threads have been removed and/or the dreaded Photobucket scandal has removed vital images from guides!

 

Any help, input is appreciated

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[jcbt]

What's your power goal?

[Crash Bandicoot]

I’m aiming for 600+

So between 6-800 would be nice,

Risky I know at the higher end....

but won’t be thrashing it constantly.

[jcbt]

I’m aiming for 600+

So between 6-800 would be nice,

Risky I know at the higher end....

but won’t be thrashing it constantly.

 

The HKS T04z is a great old school turbo but you will struggle to get much more than low 600's so your current mod's list will be sufficient but if you want to hit the higher number you will need to consider changing your turbo starting rebuilding your engine change to higher rated injectors and fuel pump and lines etc etc. My recommendation would be to stay in the 600 hp range and save money on further upgrades and enjoy useable power