jp430

First, big shot out to lextreme for his help in this project. My main goal was to safley up the HP for my 2001 GS430. I lowered the compression to 9:1 with Ross forged pistons, went with the 1uz rods (much stronger), all new gaskets, and ARP studs. I plan to be pushing 10-12 lbs. of boost. I want to stay with stock ecu/injectors. I do not know right now what the max amount of boost I can go with the stock injectors. I am currently in the process of just braking the motor in. Here are some pictures I wanted to share with you guys

Ross pistons




1uz vs 3uz


Short block

SuprRunner

Now that is a PURDY sight.

Man, those small rods...I can't believe those just don't snap at the slightest things. Those things aren't even straight. I is like a toothpick with a big and small end. Yikes.

RRocket

Could you have stroked it to 4.7 L????

LexT

How many cc's are the stock injectors? What tuning tool are you using, how much boost are you running? Are the 400/430 injectors the same? thanks

LMSguy

No way your going to be able to run 10-12LBS with stock injectors.

Dx3

iTrader: (13)

I am running about 11lbs of boost with 440 injectors. With 310's I was maxxing out my injectors at 8lbs.

Jonny

BLAZE

iTrader: (2)

Wow very nice. How much does one of those shortblocks cost? Are they fully assembled?

LexT

So, the stock GS 400/30 injectors are 310's ?

jp430

Are you using the stock ecu for those 440's? How does it run? How many miles have you been using the 440's?

jp430

Good question!!! Do the 400 and 430 use the same size injectors....stock. If the 430 uses bigger injectors, maybe I can get a few more pounds...10lbs.......????

trbopooh

Stock injectors are 270cc

Lextreme

According to Lexus OEM Repair Manual, the 2002 GS430 is about 240 to 292 cc/min

jp430

So....they are smaller?

Lextreme

John,

You can look into some of mild injectors upgrade without killing your idle:

MKIII Supra 7MGE (early model) 295 cc/min (Yellow) Mod: Change plug or mod the injector grooves

or

MKIII Supra 7MGE (later model) 315 cc/min (Lime Green) Mod: Change plug or mod the injector grooves.

I think the 315 will support 9.5 to 10 psi.

GILLEXUS

iTrader: (14)

JP430
So you replaced the entire engine block,pistons and rods? Couldn't you have just replaced the rods and pistons the weak link or does the entire lower end needs to be strenghtened??
Are you sticking w/the I-manage for your fuel management?

This should be a beast w/ the rebuild.