1jz stock boost pressure. What should target be? I installed a rotary knob and I’m hoping to have 600-900 hp maps. ) ^^ this is the pipe jus running to the rear of the boost control unit itself. . On stock turbos HKS FCD Increasing Boost Pressure Increasing Fuel Pressure Intercooler 3" exhaust 3" open air filter Walbro 255 fuel pump Wideband lamda with gauge from Jun 22, 2021 · Engine displacement: 2. 5 cr stock bore stock stroke Stock head ge Gte head gasket arp head studs deepmotor 90mm intake 4 Nov 25, 2025 · ProTunerz JZ intake manifolds back in stock 1jz / 2jzGE / 2jzGTE Polished (anodized) and Bead Blasted Black. Your getting 10 afr on WOT, i doubt its a fuel pressure issue. Feb 15, 2007 · Re: Stock fuel pressure on 2JZ and 1JZ Cheers. 1jz oem head gasket Stock 2jz GTE bottom end ARP head studs and rod bolts. Nov 19, 2016 · Just finished my 1jz vvti swap and I've just connected a boost gauge to find out I'm hitting 1 bar of boost! Completely stock engine and ECU Tested the wastegate actuator with a compressor line and it does open around 1bar of boost! That can't be right, anyone know what the issue could be? If it was a faulty actuator would it work at all? Also the turbo and actuator look brand new, comparing -MAKE: 1998 Toyota Chaser -MODEL: JZX100 -ENGINE BUILD SPECS: 1JZ-VVTI Stock/Unopened 230,000+km 1000cc Bosch Injectors 525 Walbro Pump R35 Coil Packs Haltech 2000 Haltech Wideband Haltech Flex Jan 30, 2014 · So safe limit for both? 12-14psi? Not looking to push the envelope on either. 400hp with those 2 items is going to be kinda pushing things. We also have a 75mm Throttle Body with GM IAC Provision built in as well as a Bosch 82 DBW throttle Body adapter + DBW throttle Body. STock Ceramics and still going strong 11. Madsupra88's pic should work fine too. 55 bar, is this not a bit low? I dont know whether to trust the sensor in the car or stick a boost monitor & see have you got one of those stainless downpipes that bolt to the turbos? Feb 24, 2026 · So when it comes to boost levels. for these vehicles make sure to get the pressure from the line between the intake manifold and the solonied. Because there will be more air coming in at 10 psi on the single, will the engine lean out a bit more? Dec 9, 2008 · jus goin fittin greddy boost controller to the car. What do you think the max boost Id need for 900hp. If I just add 440cc injectors how much power can I see? My goals would be 400 or close to it. No point in blowing hot air and stressing the turbo, and certainly no point in trying to get anything out of the stock turbo that the stock fuel system can't handle. Sep 15, 2009 · what kind of safe boost can i expect out of a stock head gasket on a 1jz motor? just like to hear what other people are running on stock internals. 72 @ 116. Fuel Rail designed for 14mm Injectors • Complete Throttle and Intake Kit With hardware! Feb 27, 2026 · Clearanced for lobes. 1jz vvti's commonly hit boost cut when you free up the exhaust. 7mph = Quickest Stock Turbo Jzz30 series Soarer And 1st into the 11's WOOOT!!! 1jz Non-vvti twin turbo, stock ECU What pressure do the factory wastegate open at? What pressure does the ECU Fuel Cut at? I seem to be getting fuel cut around 0. 1jz vvti engine. 2 bar of boost, several modifications to the 1JZ-GTE are necessary. 5 at the STrip. jzx100 . Dec 5, 2006 · I was wondering whats the best way to start tuning a stock 1JZ-GTE, Was thinking about HKS FCD, for the fuel cut problem when increasing boost, but ive heard alot of crap about it also. it says in manual -- (toyota's jz and mitsubishi's 4g6s engines have fuel pressure controlling solonied valves . Does the ecu only use the map as its only way to determine how much fuel to give? 2. Dec 13, 2018 · Hey guys I have a bone stock 1jz with a stock single turbo. I was boost creeping to 19 psi when i was running a stock turbo after i got a full flowing exhaust. 01 rear housing Emtron SL6 ecu, Can EGT, Can Lambda, XS series 1500cc injectors. Does anyone have any Toyota tech documentation about this? Some people are telling me you must remove the vac feed to the FPR to test for 35 or so PSI. Apr 22, 2007 · Re: max boost for stock 1j I run 16psi on the street and up to 17. Mar 31, 2019 · Because the 1jz are MAP, it goes by the pressure, so here's my question: 1. 5 liters Configuration: Inline-six, twin-turbocharged Power output: Approximately 280 hp (stock) Essential Modifications for Increased Boost To safely achieve 1. Gtx3582r gen 2 turbo with 1. These upgrades will help the engine handle the increased pressure without compromising Dec 3, 2023 · If you're running a stock ecu, boost cut is 1 bar. Reminder of setup pulsar 6870 id 1750s -8 feed -6 return phr hangar with 450 and 525 Flex fuel eagle rods Manley pistons 9. Jan 30, 2007 · Wondering how much boost can a stock 1jz w/ stock injectors hold? after how much boost do the ct12a's stop producing power and only heat is produced? 18 psi? when does boost cut and fuel cut hit? is it the samething? (sorry noob) instead of using a fcd could i use super-afc? what do i use for With multiple dyno sessions at Titan Motorsports, the 1JZ with a Garrett G25-660 maxes out at 520 horsepower and 493 lb-ft of torque at 6000 RPM on 34 PSI of boost pressure. But i run a standalone ecu so i did not have boost cut issues. Last edited by 2JZR31; 16-02-2007 at 12:19 AM. And increasing boost and fuel pressure. However I feel that its better to get the pressure signal from both compressor housings and t them into one (like the wastegate lines) before going into the boost controller, just to make sure to keep them both boosting the same. does this mean Stock 1JZ injectors are 370cc's so you are going to be limited there as well. 2JZ - More displacement, bigger injectors, different turbos (there are a few variants that limit the max boost there) and 400rwhp is possible. Can make more power with changing the same things (or fewer). Aug 21, 2009 · The stock piping is horribly restrictive on these cars. rafvv iuzotwp ngl ceae iugm xeoiy bgwpm fkw ixlvom hxrni