I am thinkinmg about the Single Turbo upgrade. Just a T4 with .60 AR...

My worry is the injectoors and fuel pump...

If I was to get a Walbro 255 fuel pump...

What would I need to upgrade the injectors?

Will Supra TT Injectors be better?

Will the stock ECU control the Supra TT / aftermarket Injectors?

What will I need to control the fuel?

Can I do Supra TT injectors and Walbro Fuel pump and USE a S-AFC to control the Fuel???

Thanx in advance.

 

What is your hp goal?

 

Would like to keep it at 500HP

 

According to your profile you have a regular GS with no swap. You will not make 500 hp on a 60-1 with a stock head gasket with out 150 octane, and even then you maxed out the compressor. Next, the stock trans will not shift well over 325 hp. I've heard that the rev limiter starts getting hit at 350 during shifts. SO, the stock fuel pump and injectors can handle 325 and an AFC would be necessary. You should be able to pull that off on 93 octane at about 8-9psi.

 

He haves a 2jzte in he car from a Aristo Kaiser.

 

Ok then, a staight T4 60 compressor is going to be running out of it's effiency range around 500 wheels. A byproduct of compression is heat, the higher the power, the more heat, the more risk of detonation. I have a 60-1 with a .70 AR and I'm making just shy of 400 wheels on 91 octane. I think you have the wrong turbo to achieve that goal if you plan on using pump gas. Perhaps if you changed out the cams, or at least the intake cam to a US spec you'd have a better shot. It has 9 more degrees of duration and will help out above 4500 rpms. The exhaust cam is the same between JDM and US.
The transmission although better, is rumored to be near death over 450 wheels. Some supra guys have done over 500 on stockers but I've never heard of one lasting longer than a year at that level. Get yourself a trans cooler if you don't have one already. I'm staying just a shade under 400 myself until I can afford an upgrade from SP or BL.
As for fuel, yeah change that pump to a Walbro GSS342. The injectors have been flowed out by a few Supra guys and they come out to be really 480cc. The conversion to #'s per minute is 10.4 I believe which makes them something like a 46# per minute. I don't know what the psi on the rail is to get an accurate calculation, however I think it's around 50 at WOT but not certain. Figure somewhere 500 crank is going to max them out. So my suggestion is turn up the turbo you have to around 400 wheels and call it good. If that doesn't do it for you, get a set of 550 injectors off Supra forums with the rail. They sell between $100-$150. Don't forget the resistor pack because they are low impedence and the ECU is set up for high. Then get a MAPECU so you can get a map sensor that will have resolution above 14psi.

 

Thak yoo for the info...

a couple questions / clarifications...

So If I get the Supra Rail and Injectors I am in better shape with the new Fuel pump... This resister pack you mentioned, Is that out of a supra or do I need that from the dealer, For the ecu to control the injectors?

I will be using a Gredy BCC will thi do the same thing as Map ECU.

Or do I need somethin different...

One last thing 500WHP is not crusial for me... If I pull one Dyno rin with that I will be happy, Street driving I would keep it around 400 ish. I personally think 500 Whp on street drivingis just not needed. Notice I said NEEDED...

If everything woks out I would propably upgrade the Turo an Have the tranny built, But now it will have to be a budget system, Since I am dumping a lot of time and money in the stereo as well.

 

Fuel pump upgrade will be a must for that hp level.

The resistor pack is a stock part on the tt supra but you can use DSM packs if they are easier to get.

BCC and MAPECU are COMPLETELY different. The BCC is a voltage lock so the ECU will not go into boost protection. The MAPECU is to control the voltage to the computer so you can run larger injectors and control the fuel tuning.

If you have the extra money so you can 'say' you can do 500rwhp then go for it. I recommened you get the BCC, turn up the boost on a dyno and see how it goes first, then spend the money if it's not enough.

 

Thank you.

 

sign up in SupraForum's

many of the 2JZ-NA-T and 2JZGTE questions have been asked and answered many times.

It takes some patience searching but the answer is there.


However, it would suck if SF went away so it's not a bad idea to post these types of questions on CL forum.


Is there a sticky on CL forums for this.... I haven't really looked.