Nissan 370Z Forum - View Single Post

TopgunZ · 10-05-2015, 05:22 PM

In regards to the spring in the bpv. I think you have to trim it to fit your design. Since all our kits are going to be different it will act differently. I was trimming mine down ever so slightly to get it right.

Just buy the smallest spring pressure, blue. Try it out in the bpv first and loosen the cap out as far as possible. From there see how bad the gobble is. Then trim it down by 1/4" at a time depending on your results. I maybe trimmed mine down 3 times taking roughly 1/4" off at a time. It barely has pressure on it siting stationary but will push down hard enough to hold my max boost.

10-05-2015, 05:22 PM	#479 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	In regards to the spring in the bpv. I think you have to trim it to fit your design. Since all our kits are going to be different it will act differently. I was trimming mine down ever so slightly to get it right. Just buy the smallest spring pressure, blue. Try it out in the bpv first and loosen the cap out as far as possible. From there see how bad the gobble is. Then trim it down by 1/4" at a time depending on your results. I maybe trimmed mine down 3 times taking roughly 1/4" off at a time. It barely has pressure on it siting stationary but will push down hard enough to hold my max boost. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM