Hster time attack build 180sx SR

[battery1882]

working outside sucks..

progress being made and aiming to race at global time attack 2019 SLB!

[battery1882]

oops duplicate..

I guess I'll write some of my goals for this phase of build :

5-600hp
2600lb
tubing front
v-mount
carbon hood, carbon hatch, lexan hatch glass
bigger wing, bigger splitter
Competing in "limited class" Global Time Attack and class 1 at Nissan Challenge!

will update as I go.

[battery1882]

Here is the fuel system breakdown. I was intially seaching for an in-tank, dual-pump hanger setup until I learned about the newschool surge tanks housing 1-3 fuel pumps. I was getting some fuel cuts with slicks on corners with over 1.3G, so I figured surge tank was the perfect solution.

I'm shooting for 5-600hp but I was advised that the following list was bare minimum to break into 5-600 safely (especially with pushing lateral g's of over 1.5). Kaizen motorsports has knowledge and experience with this stuff so I chose to do everything Jose @ kaizen recommended. in Hindsight, I'm glad I did.

New stainless lines :
1/2" (-8) fuel feed
3/8" (-6) fuel return

Radium surge tank

aem 340 intank
walbro 450 dual intanks inside the surge tank
aluminum fuel rail
Injector dynamics 1350cc
AEM fuel Pressure regulator
AEM Ethanol content sensor


all lines are XRP crimped with XRP press.

[brndck]

have you ever looked into a holley fuel mat?

https://www.holley.com/products/fuel_systems/hydramat/

[battery1882]

Originally Posted by brndck

have you ever looked into a holley fuel mat?

https://www.holley.com/products/fuel_systems/hydramat/

Hey brndck,

I've seen them before but have not looked into it. I think what I have now should be good but I'll keep this in mind if there's any issue. Have you had any experience with them?

[brndck]

Originally Posted by battery1882

Hey brndck,
I've seen them before but have not looked into it. I think what I have now should be good but I'll keep this in mind if there's any issue. Have you had any experience with them?

I bought one, its been sitting on a shelf since my car is in pieces.
I removed the slosh baffle inside the fuel tank and this mat will cover the majority of the floor of the fuel tank.

seems like a good/cheap alternative to volume tanks and secondary fuel pumps, but I guess i'll have to wait to render final verdict until my car is actually assembled

[ka-titties]

The Holley Fuel Mats are super effective. Especially with a fuel tank like the S13.

[battery1882]

onto the fabrication!

[da_crew10]

So hyped for this rebuild. Love how you are going full race car mode now!

[battery1882]

Originally Posted by da_crew10

So hyped for this rebuild. Love how you are going full race car mode now!

thank you! update.

[battery1882]

another one!

[da_crew10]

Nice update. I am thoroughly enjoying this.

Even though my eyes bled when they saw those Rocket Bunny things I still think this Time Attack beast is so cool! Can't wait to see it rip!

[battery1882]

Originally Posted by da_crew10

Nice update. I am thoroughly enjoying this.

Even though my eyes bled when they saw those Rocket Bunny things I still think this Time Attack beast is so cool! Can't wait to see it rip!

I appreciate your honest opinion about the rocket bunny haha. I was actually in the same shoes until I was approached with them in a trade deal. it's funny because side skirts happened to shatter at buttonwillow last week. I guess it was never meant to be. I'll be keeping the front and throwing away the rear. may be it will be "Rocket" now

[battery1882]

went back to bw and recorded pb before Christmas 2019. Suspension is getting close to where I want it, but there's still some minor changes to be made. sub50 was definately doable but I didn't push too hard.

[nick_d_240sx]

That's fuckin awesome! Nice driving! Do you have any thoughts on the pros/cons of the 2JZ over the SR20? I may have missed it, but can you share a little more about the 2JZ setup, turbo, any cams or anything, and how do you like the AEM Infinity, how did tuning go?

Can't wait to see more of this beast in action!

[battery1882]

Originally Posted by nick_d_240sx

That's fuckin awesome! Nice driving! Do you have any thoughts on the pros/cons of the 2JZ over the SR20? I may have missed it, but can you share a little more about the 2JZ setup, turbo, any cams or anything, and how do you like the AEM Infinity, how did tuning go?

Can't wait to see more of this beast in action!

Hi Nick,

My car with SR had 53/47 weight distribution and 2jz is 54/46. Too many variables have been changed to compare sr vs 2jz fairly.
I've also went from 2650lb semi track car(street class) to 2500lb full race car(limited class) stripping pretty much the entire car. But to summarize it, 2jz does not change the characteristic of the car as much as you would think. I've had LS, VQ, SR, KA in various s chassis and finally 2jz and I want to say it doesn't feel much different lol, well obviously besides the torque band and power delivery. To this day, if I have to choose a favorite engine in a s-chassis, It would have to be the SR. 1. it's light, 2. it's high revving, 3. it's cheap to build (up until you get to around 350hp), anything after this, I feel it gets as expensive as other engine choices. My decision of going 2jz was simple: ease of modding, reliability, and cost.

[battery1882]

Forum doesn't allow long paragraphs anymore.. so much got deleted

part 2:

2jz(stock longblock), Comp Turbo 6267 Journal bearing, Injector Dynamics 1300cc injectors, AEM Infinity (love it! all the cool safety features and logging ability)

I'll be working on youtube dyno post shortly and will make sure to share here as well!

TGIF

[battery1882]

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

[PoorMans180SX]

Dang dude, that's rough about the rubbing!! Hopefully you can get it sorted.

The stacked intercooler/rad setup with a vent out the hood is very similar to what I have planned for my "race car". Very cool to see it is indeed functional.

I see what you mean in your video about the staggered setup. Seems like it had some off throttle push?

[battery1882]

Originally Posted by PoorMans180SX

Dang dude, that's rough about the rubbing!! Hopefully you can get it sorted.

The stacked intercooler/rad setup with a vent out the hood is very similar to what I have planned for my "race car". Very cool to see it is indeed functional.

I see what you mean in your video about the staggered setup. Seems like it had some off throttle push?

Thank you! and yeah the suspension needs to be dialed in more and myself can use more seat time.. it behaves way different than before..

[battery1882]

It's been a while..

I'll update the youtube link.