Turbo BS Thread

Low manifold pressure at low rpm and low throttle position is most likely late intake valve closing. I don't know your cam profile, but when your manifold pressure shoots up your piston is pumping a bit of air back into your manifold before your valve closes. That increase of pressure helps with pumping loss. That is mostly for emissions with little to no change in performance.

 

Oh thats already done i went 4.88 with an arb in the front and the true trac in the rear with a twin stick fj transfer case.

 

Usually if you have oil in your exhaust you have blown your turbine seal. If you have pre turbo thats even worse. Might have to yank it off and reseal it

 

Vaccuum is dictated by many things such as how far the valve opens up, throttle plate position, load or no load, and altitude. The less vacuum the less parasitic drag forced on the piston. Like a syringe the diameter of the piston and the diameter of the opening dictate how difficutl it is to pull back( the viscosity of the fluid plays a part). Atmospheric pressure in a naturally aspirated engine plays a big part with vacuum. I mean it can get pretty involved especially if its diesel or gas direct injected or indirect injected. If you start playing with vvt im guessing with your 2tr fe? I havent started tuning yet but that is a big chunk what i have learned. I deal with mostly diesels and we usually dont worry about vacuum

 

I had oil everywhere but journal bearings and stuff so... I had it off today but its back on now

 

Should have gone 5.29s for 35s

 

The 5.29's in our trucks are very temperamental and are prone to break

 

Yeah? according to who?

Thats a myth man. haha they are actually stronger than your 4.88s.

Zuk the gear god of toyota's even proved it on his site.

Also..mine are doing fine

IMG_0123 by Benjamin Springli, on Flickr

 

Material strengths can overcome leverage forces.

 

Just started messing with the VVT-I aspect of the Haltech, eh?

 

I’ve had it working but the table was populated with another vehicles’ tune (still is).
I’m playing with the injector timing now, which is honestly a waste of my time because I don’t know what I’m doing. I wish I knew a tuner I could just drop it off and say “here, have fun and I’ll see you in a couple days”.

 

A lot of my tables are borrowed from other tunes, no idea what I’m doing with those. I have all the sensors calibrated, that I could do. I really do need to find a tuner.

 

Which vehicle did you use to setup your VVT-I solenoid?

 

2JZ got me real close

 

Compare against the Lexus IS300 in your file. That one is the closest. Their map is actually the same as what was found on the 1GR Tacomas, when HP Tuners was able to view it.

 

It's the same, that IS300 is a 2JZ haha

 

Haltech must have updated their files then. The JZ ones didn't have the proper compatibility, when I was comparing.

 

I pulled a little more fuel and it seems to pike it a little better... I may have to add a drop or two back afrs blip to 13 on the shift when load increased. Also going from a coast to wot the lag seems intensified becauae of all the vacuum I have to overcome, but in normal driving it pulls pretty great

https://youtu.be/NcOYwuQF4Ls

 

Moving the quickest I have ever seen yours move!

 

Really since 33s are ~8% taller than stock that is almost a 30-90 pull in ~8ish seconds and im ok with that