racer1

Bought a T51R-KAI BB kit and gonna install it at my stock 2000 motor. I use PFC with digibox+commander, is wideband needed? What size primary/secondary injectors shall i use? i thought of 850cprimary 1300-1600 secondary what you think?

Also 2 HKS twin power or one is enough?

I will go with internal+external HKS fuel pumps and Apexi FRP as well as thinking of Apexi GT spec FMIC.

Any ideas?

Pressurized

wideband is very helpful, not absolutely required, though most would advise adding one.

as for injectors, depending on power you are looking to make, most go 850/1600.

you will only need 1 TwinPower.

for fuel pumps, there are many units that are much cheaper and flow just as good, if not better than an HKS unit.

as for an FMIC, again depending on power output and goals, i would look into a GReddy 2 or 3-row.

also, you know that is a monster turbo...you might wanna look into getting the motor 'built' and strengthned.

racer1

pressurized thanx for the advise. What actually does the wideband do? Also i will not go for 15psi with the stock engine...i'll go up to 10psi till i get a ported one with 3mm seals. You think it's gonna brake as well?

Pressurized

the wideband reads a pretty accurate A/F ratio across the board, it's very helpful in tuning the car and knowing how the car is running.

the stock motor will probably be fine for a while, depending on how you abuse it, and the tuning...but you are missing out on a awful lot of power.

Silver7

racer1 - it's all too obvious that you are fairly new here. Do some searching. Most of your questions will be answered.
A few questions...
1)why go with a T51R if you only plan on running 10psi.
2)a stock motor can handle 20+ psi of boost as long as it's tuned properly.
3)Why do you want to jump right into 3mm seals? Most people don't use them because they are not needed.
4)a wideband is just a tool to help you tune. It's not a performace mod in any way, but it is highly recommended that you have one if you begin to heavily mod your car.

sub-zero

That huge turbo at 10 PSI will be a waste. Your car will not be fun to drive and the stock twins will out pull the HKS at 10 PSI. I have a T-72 that does not start making any decent power untill 4500 RPM and then it is insane and hard to keep it straight. Unless You are doing nothing but drag racing the big turbo`s are fun for awhile but in the long run something streetable is the way I am going.

To Walbro pumps are alot cheaper by the way and will give You enough fuel.



Also with that setup and I doubt You have any decent tuners in Cyprus I would spend the few extra bucks for a wideband and join the Datalogit Group or You might be saying goodbye to that 2000 motor.

Icemastr

iTrader: (2)

A HKS T51R KAI is going to make about 380-400RWHP @ 10psi, stock twins max out about 350RWHP @ 15 psi. At 15PSI a T51R KAI is going to make 450-475. PSI isnt just PSI, its how efficiently the turbo can flow air. You should be able to run 15psi or so on pump gas and a stock motor and be ok with a good dyno tuning, your going to have a good bit more turbo lag than running stock twins non-sequential.

Silver7

I agree with sub-zero. In a street race my money would be on stock twins at 10 psi. Bigger isn't always better. I would be willing to bet the stock turbos produce more area under the curve at 10 psi.

racer1

What do you mean guys by "street race"? in my country the only race we make is from a stop or roll on drag race on the street. How the stock twins can beat a T51 on such a race?

Silver7

Based on the simple fact that 10 psi is well in the efficiency range of the stock turbos and out of the efficiency range of the T51R. Yes the T51R will pull higher HP numbers due to it's increased air flow, but area under the curve is a whole different matter. I would still put my money on the stock twins in a drag race between the two at 10 psi.

RxDriver

Get a T04B with a 1.15 AR on the turbine side. With a .60 on the compressor side. It will spool fast and give you pleanty of power. You don't need the wideband if you have a good dyno shop around to tune up on.