FOUR T2

Posted this on the sticky too, but thought i may get a quicker response from here:
...I am piecing together parts to boost my xA...and hope someone can answer a few questions for me as I decide what parts to purchase...please forgive me or at least give a link if these ?'s were answered anywhere else:

Is there is a Walbro 255 that fits in the Xa pump can?/ is it the same as the Tc pump can? Do I even need 255lph?

What is the stock fuel pressure?

What is the stock injector flowrate?

and are the xA's map or maf based?

As with most questions, these will probably lead to other questions...so thanks for any help you give, and I will probably need more.

DeatschWerks

To answer about the fuel pump, what kind of power are you looking to put down?

Fuel Pressure - 42-47 psi

Stock injectors - 270cc

xA's are MAF based.

FOUR T2

Thanks for the reply...gonna run on stock internals so I am just planning on running at wastegate pressure which is right around 8 psi...from the compression map I ran it looks like crank power should be around 180 or so...essentially I just need to know if the stock fuel pump will work with this set-up with the addition of a fpr...

DeatschWerks

If you get an adjustable FPR or at least one that does 1:1, you should be okay on the stock injectors, but you'll be pretty close to maxing them out.

Is the 1st Gen xA a return or returnless fuel system?

FOUR T2

returnless...also are you sure on the 270cc? Someone told me they were 180cc...

DeatschWerks

You know, I think you are right. I remember doing some research on it the end of last week and I bet I got the tC's mixed up with the xA's. You could use some tC injectors.

FOUR T2

that's what I have heard...also celica injectors...do you think the stock fuel pump would handle those?

DeatschWerks

If your fuel system is returnless, you won't be able to just install an adjustable FPR on the rail. The returnless systems have an in-tank FPR, and I haven't come across anyone using an adjustable FPR in the tank.

FOUR T2

exactly...I planning on running a return line...what I really need to know is if i need to replace the fuel pump for the higher flowrate...

vettereddie

Four T2, I replied already in the sticky. Please give PTuning a PM, Justin's already gone through all this on his xA and he works at the shop. I believe he maxxed the stock pump at 170 WHP on a modified Greddy turbo and 625cc injectors. I think he's now running a custom return system modded from the PTuning tC setup but I could be wrong. See this post:

https://www.scionlife.com/forums/sho...d.php?t=185450

Are you swapping internals? What is your final c/r? This will help determine applicable boost level and fuel consumption.