Here is an update on the Piers cam in my truck. As you guys may remember I was impressed with the Piers 24v cam that was installed in back July. Fuel mileage was up, egt's down, and top end power increased slightly. The one thing that didn't change much was spoolup time for the turbo
.
Well..... I must now happily update the spoolup issue! Seems that when the cam was installed the valve lash was not set correctly. On Thursday night I set the lash to the correct specification and boy did the truck come to life! Spoolup is very much improved. In fact just cruising down the road at 65 mph on level ground I always showed 0 psi on my boost gauge, now it reads 3-4 psi. Also when I dynoed this weekend during the MD-TDR Fall Brawl the charts confirmed that I was in fact producing more HP and torque at a lower rpm. Peak #'s were just up slightly but prior to the cam install I reached 750 HP at 3100 rpm and 1200 lbs torque at 2550 rpm. After the cam install I obtained 750 HP at 2600 rpm and 1200 lbs torque at 2200 rpm! The two dyno runs compared were identical setups on the truck except for the cam.
As for driving the truck I can really feel the increased low end! Another benefit from getting the valve lash set correctly is a further decrease in egt's. Turbo cooldown time is almost nonexistant when the outside air is around 75*. For anyone considering a cam change I HIGHLY recommend Piers' Cam!
Doug

Well..... I must now happily update the spoolup issue! Seems that when the cam was installed the valve lash was not set correctly. On Thursday night I set the lash to the correct specification and boy did the truck come to life! Spoolup is very much improved. In fact just cruising down the road at 65 mph on level ground I always showed 0 psi on my boost gauge, now it reads 3-4 psi. Also when I dynoed this weekend during the MD-TDR Fall Brawl the charts confirmed that I was in fact producing more HP and torque at a lower rpm. Peak #'s were just up slightly but prior to the cam install I reached 750 HP at 3100 rpm and 1200 lbs torque at 2550 rpm. After the cam install I obtained 750 HP at 2600 rpm and 1200 lbs torque at 2200 rpm! The two dyno runs compared were identical setups on the truck except for the cam.
As for driving the truck I can really feel the increased low end! Another benefit from getting the valve lash set correctly is a further decrease in egt's. Turbo cooldown time is almost nonexistant when the outside air is around 75*. For anyone considering a cam change I HIGHLY recommend Piers' Cam!
Doug
Last edited: