Did quiet a bit of work while covid shutdown..
the biggest weakness of the 2jz engine, i found out, was cooling. Well, 99% of cars out there with 2jz cooling issues are probably due to wrong fan sizing. However I was using a single 600w fan (that's 50amp!!) so I knew something else had to be wrong. I'm still working this, but I think I have narrowed it down to few areas. I worked on the venting of the air mostly.
Next up was oil. I noticed that Tomei Japan just released the oil baffle kit for 2jz in three different config(front,mid, rear sump). As you guys know, we are forced to use the front sump design on our cars regardless of the engine. (ls,2jz,sr,ka) I think this may cause some of low oil pressure situation when you are accelerating with high g corner as oil gets pushed to the rear leaving low oil on the front, where the sump pickup is located. I am monitoring the pressure with AEM infinity so I'll see if this baffle actually helps!
then the spoiler was next. I didn't measure the downforce of the rear but rear downforce did not feel direct and strong subjectively. Also the rear frame was super weakened after 30 years of driving and 3-4 years of tracking. so I decided to move it inward and apply direct downward force.
had to make sure the hatch closes. added two quick latch on top.
Next was fitting the bigger tire. I was running staggered setup(265,295) and really didn't like how it behaved. So I figured this was the perfect time to upgrade as I was determined to go full slicks. (was running 200tw before)
fitting 10.5 +25 in front
with 27 68 18 michelin slicks. which is like 275-285 40 18 equivalent.
At this point, I went to buttonwillow to test. found out the tires were rubbing at full lock
I swear it didn't rub when I checked but somehow inner frame sheet unfolded in some area rubbing against the inner tire.. well long story short, I made a stupid mistake and wasted alot of money.. my instagram has the in-car video of what happened. you can see the wheels locking after countersteering
Below is arts and craft day before the track day.. now i go back to garage and fix more stuff.. lol
