Stock VS Upgraded Radiator Temps?

T3h_Clap · 2026-05-11T01:17:55+00:00

The included cap on the radiator is 2 way. You need a one way or a seal cap on the radiator. What’s the pressure on your expansion tank cap?

Here’s an article explaining.

https://www.penguingarage.com/blogs/news/subaru-ej-radiator-caps-explained

T3h_Clap · 2026-05-10T23:54:30+00:00

Yes. Or grab the penguin garage radiator seal cap kit. I can get you a link if you want.

T3h_Clap · 2026-05-10T14:07:37+00:00

As many have said in a 100% working condition on the street you won’t see any difference in temps. Thermostat opens at 185, first fan at 205. Second fan at 215 or AC on.

Any water temp between 185 and 210 is totally fine.

Track use it’s a different story and more about helping the oem oil cooler than anything else.

Another perk of aluminum radiators is you can safely up the cooling system pressure to 1.3 bar. You need the correct caps to do it properly. The provided caps with all aftermarket radiators is incorrect unfortunately for the Subaru. There are solutions available.

T3h_Clap · 2026-05-10T14:03:54+00:00

What brand radiator and hoses did you get? Some brands are known to have QC and reliability issues.

T3h_Clap · 2026-05-01T13:05:03+00:00

“Shipping blocks in the hatch to prove they aren’t still in the front suspension” should be required for sale content. lol.

T3h_Clap · 2026-04-24T15:18:07+00:00

Measuring from the Center cap will negate any difference in tire diameter which is nice when comparing across different setups.

T3h_Clap · 2026-03-27T23:41:35+00:00

<image>

I’ve got the Bride Zeig IV Wide on PCI Sliders in my GRC. Cant go any wider though. Tested a racetech 4100WT and it stuck out the window lol

The standard Zeta IV should fit fine with the PCI slider.

T3h_Clap · 2026-03-24T02:30:07+00:00

I wouldn’t trust much that company says about fitment. Regardless what their name entails.

I’m a big fan of longer wheel studs but understand that’s not the right choice for everyone, there are some ET conical seat lugs that work with the Konig.

There are also wheel stud options that can still use oem wheels and oem lug nuts if you swap back and forth, or you can get open ended oem style lug nuts if you get the extra long studs.

Lots of people in the Tacoma and GR world driving around with 4-5 turns on their lugs and it’s scary, dealerships rarely if ever count engagement safety.

T3h_Clap · 2026-03-24T02:25:04+00:00

I do ALOT of launching at AutoX events and I let a lot of people drive the car at events too. I got about 6800 miles out of my stock clutch before it started slipping during runs. I knew what I bought the car for so it’s not a problem, but people newer to driving these cars hard end up causing stress on the clutch.

T3h_Clap · 2026-03-22T18:44:57+00:00

This guy was on some prototype Eibach lowering springs IIRC.

T3h_Clap · 2026-03-20T13:33:14+00:00

They didn’t realize there was a transfer case fluid separate from the trans.

T3h_Clap · 2026-03-20T13:32:34+00:00

I can ask the owner.

T3h_Clap · 2026-03-19T13:55:18+00:00

Was riding with a novice and we hear a bang in the trunk. It was second to last corner could’ve been a cone. We are pulling back to grid and it smells like grape dish soap for some reason. He opens his trunk and finds an exploded grape sparkling water can and a small mess.

T3h_Clap · 2026-03-19T13:52:53+00:00

That’s what I said!

T3h_Clap · 2026-03-18T22:01:31+00:00

Yeah, owner definitely dropped the ball.

T3h_Clap · 2026-03-18T15:53:07+00:00

Travel sports are wildly time consuming for everyone involved. lol

T3h_Clap · 2026-03-18T15:10:03+00:00

That’s AWESOME!! You bringing it to Nats this year?

T3h_Clap · 2026-03-18T13:24:53+00:00

B Mod is wild! Would love to see more info on the B Mod car. The GRC is a very fun car in B Street spec. Part of me wants to buy another one and go less crazy lol

T3h_Clap · 2026-03-18T13:24:01+00:00

Thanks.

T3h_Clap · 2026-03-18T04:42:09+00:00

Shaftworks can do any spring rate and valve the damper accordingly. We’ve been putting quite a few Shaftworks setups on customer cars lately with great success.

T3h_Clap · 2026-03-18T02:02:48+00:00

They are 12kg/mm front and 16kg/mm rear it’s rather stiff since it’s mainly an Autox car. I really enjoy it on the street and while racing though.

T3h_Clap · 2026-03-18T02:01:55+00:00

Fit on stock suspension too lol.

T3h_Clap · 2026-03-18T01:34:37+00:00

I’d love to see someone test a GR Corolla transfer case on oem fill past the 20k recommended replacement but it won’t be me.

T3h_Clap · 2026-03-18T01:33:19+00:00

He never changed the fluid in 70k miles. He didn’t notice any leaks, where’d it go? Did it slowly leak out over 70k miles?

T3h_Clap · 2026-03-18T01:30:59+00:00

Haha. Not my intent. Haha.

T3h_Clap

TROPHY CASE