Is an hks “gt1” 50mm wastegate still up to par ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

loveforanescape · 08-02-2019, 09:05 PM

Hello fellow zilvians,

Found a good deal on a old school 50mm Hks wastegate.

Kinda silly I’m considering to even buy this but at a decent price plus me being a sucker for old jdm stuff, I’d pull the trigger.

Have an rb25 and plan on running up towards 320whp - 400whp I on my setup. Since this is a 50mm wastegate would it really lack on the responsiveness?
What other cons would this display on my power goals?
My prioritiy is set on a responsive powerband for drifting.

If any one could point a noob in the right direction I’d greatly appreciate it!

spooled240 · 08-02-2019, 09:46 PM

What you should be more concerned with is the application. 50mm is pretty large and is typically only needed on larger displacement engines running lower boost pressures.

I have a 35mm on my ka24 and it does fine o 8 psi of boost. 50mm for me would be overkill. If I was running an LS1 with 8psi I might need a 50mm wg.

08-02-2019, 09:05 PM	#1
loveforanescape Join Date: Feb 2018 Location: Nowhere Age: 26 Posts: 32 Trader Rating: (0) Feedback Score: 0 reviews	Is an hks “gt1” 50mm wastegate still up to par ? Hello fellow zilvians, Found a good deal on a old school 50mm Hks wastegate. Kinda silly I’m considering to even buy this but at a decent price plus me being a sucker for old jdm stuff, I’d pull the trigger. Have an rb25 and plan on running up towards 320whp - 400whp I on my setup. Since this is a 50mm wastegate would it really lack on the responsiveness? What other cons would this display on my power goals? My prioritiy is set on a responsive powerband for drifting. If any one could point a noob in the right direction I’d greatly appreciate it!

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08-02-2019, 09:46 PM	#2
spooled240 Post Whore! Join Date: Mar 2008 Location: San Diego, CA Posts: 4,140 Trader Rating: (27) Feedback Score: 27 reviews	What you should be more concerned with is the application. 50mm is pretty large and is typically only needed on larger displacement engines running lower boost pressures. I have a 35mm on my ka24 and it does fine o 8 psi of boost. 50mm for me would be overkill. If I was running an LS1 with 8psi I might need a 50mm wg.