Subaru Enthusiasts Car Club of the Sierras - View Single Post

sybir · 2006-03-14, 07:57 AM

Reread that RRE quote, it's for their DP. Sounds like marketing trying to justify using a 2.5 inch initial section for clearance reasons, then going to the full 3". A full 3" setup on the waste side of the turbo is going to let you clear stuff out more effectively; notice they're not talking about scavenging or anyhtign like that, they're saying "yeah, 2.5 is *ok* for this section, because it's like stock, then we flare out.

Sounds like a copout to me. Not saying a 5" DP is necessary, and there's evidence that the big bellmouths like the TurboXS can hurt torque a bit down low at the same time that it opens up a little bit of HP on top, but I wouldn't base an argument on a sales pitch.

2006-03-14, 07:57 AM	#59
sybir The Don Real Name: Aaron Join Date: Oct 2003 Location: Sacramento Posts: 3,097 Car: '97 Legacy / '05 FXT Class: low	Reread that RRE quote, it's for their DP. Sounds like marketing trying to justify using a 2.5 inch initial section for clearance reasons, then going to the full 3". A full 3" setup on the waste side of the turbo is going to let you clear stuff out more effectively; notice they're not talking about scavenging or anyhtign like that, they're saying "yeah, 2.5 is ok for this section, because it's like stock, then we flare out. Sounds like a copout to me. Not saying a 5" DP is necessary, and there's evidence that the big bellmouths like the TurboXS can hurt torque a bit down low at the same time that it opens up a little bit of HP on top, but I wouldn't base an argument on a sales pitch. __________________ Tact is for people who aren't witty enough to be sarcastic.