Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - rb25det turbo manifold... should i resort to stock rather than OBX?

opponheimer · 01-04-2009, 06:53 PM

I know most people would say Neither, go full race!

But i have an obx turbo manifold coming in, and an GT3582r turbo. Was curious if some of you would rather run the turbo on the stock manifold as opposed to the obx manifold. I am not sure whether it will crack, but many people seem to think those stainless manifolds are made to crack. The manifold also has a 40mm wastegate flange (which is rather small).

So run the stock one (and weld on a 50mm wastegate flange) or run the obx and gain top end at a risk of it cracking?

If i do run the obx manifold i plan on beefing it up a bit... was curious what types of things i should do; ie: slot the runners on the flange, reweld seams, add bracing, etc..

Thanks

01-04-2009, 06:53 PM	#1
opponheimer Zilvia FREAK! Join Date: Apr 2007 Location: Bikini Atoll Posts: 1,267 Trader Rating: (3)	rb25det turbo manifold... should i resort to stock rather than OBX? I know most people would say Neither, go full race! But i have an obx turbo manifold coming in, and an GT3582r turbo. Was curious if some of you would rather run the turbo on the stock manifold as opposed to the obx manifold. I am not sure whether it will crack, but many people seem to think those stainless manifolds are made to crack. The manifold also has a 40mm wastegate flange (which is rather small). So run the stock one (and weld on a 50mm wastegate flange) or run the obx and gain top end at a risk of it cracking? If i do run the obx manifold i plan on beefing it up a bit... was curious what types of things i should do; ie: slot the runners on the flange, reweld seams, add bracing, etc.. Thanks