Originally Posted by
NissanGuy S4s gen4 HS, stock and ebay
your VE has:
HS Gen 5 header
High lobe IN-.421" LIFT/264 DEG.DUR - High lobe EXH-.407" LIFT/268 DEG.DUR
way more than 167 butt-dyno whp
your DE has:
HS Gen 4 header
S4 cams- IN- .464" LIFT/266 DEG.DUR. EXH- .464" LIFT/266 DEG.DUR.
167 dyno'd whp
what about compression in the two? That is obviously a factor because the S4 cams are WAY more aggressive, yet yielding much less power? We need to see a dyno on your VE. You're 167 whp seems about right for a bolted/tuned S4 equipped DE.
Is there any chance of the "VTAK KICKED IN y0!!!" affect??
(source of cam lobe info:
SR20 Forum - View Single Post - S3, S4, S5 cam comparison)