| The turbo kit was promptly delivered wilh all pieces accounted for (no damage). Each turbo was individually foam wrapped and boxed along with all the extra bits sent in a large zip-lock style bag. All items were shipped in one large box properly packaged. I bench checked the preload on the turbos with no issues or unexpected problems. They both started to open @ 17psi. One note to other people who install the t-bolt clamps to the silicone couplers, make sure you tighten them down after the engine is placed back in the Z. It was difficult to find the proper angle to fit a socket or wrench to clamp on the passenger side coupler due to the close proximity of water lines coming in and out of the turbo. Installing them was pretty straight forward. In my particular case I am using MSP manifolds with 3" down pipes with matching 3" test pipes. The actuators are free of any obstructions paying close attention to the top part of the oil tree. I needed to trim the factory heat shields so the compressor housing has the clearance necessary to fit properly. The oil feed lines fit pretty good (proper length). The silicone couplers that come with the kit could be a little longer. When I was test fitting the boost lines I had to remove the bracket that connects the block to the upper plenum so the pipes could connect together with the rest of the system. The couplers would need to be about 1"-1.5" taller if I wanted to reconnect the factory hard pipe to the bracket I removed earlier. My first driving impressions were very good. Boost would build at low rpm's but really didn't kick you in the pants until you hit 3800-4K rpm. For the first few days I was running around 15psi with no boost controller. The power at that boost level felt similar to my previous turbo kit (JWT 530bb) @ 20psi + water injection with stock manifolds and 2.5" split down pipes. I turned on the boost controller and started to raise the boost to around 17-18psi changed the Z quite a bit, very little traction in 2nd, 3 hooks up but only in a straight line pulls using 295-30-18 R compound tires. On hot summer days the tires work a lot better and can grip WOT in 2nd but would complain, squirm and slide a little having to make small steering corrections to keep er pointed straight. On the street a friend of mine has a Z with a JWT500 kit running around the same boost level. One time he started WOT about 6-8 car lengths behind me on the interstate. By the time I noticed he was closing fast with around 3-4 car lengths to go before he would pass me. I shifted into 3rd and gave er the berries and had enough power to keep him behind me and pull away from him despite the late start:) Overall, yes there is more turbo lag compared to the JWT 530bb kit, but can be easily corrected with different driving habits. For example, when driving around town you need to shift about 1K rpm higher to keep you in the "the zone" with the bigger turbos. Taking corners takes a little more planning, you need to get on the gas a lot earlier to make sure you maintain your momentum. When shifting at WOT I need to go all the way up to 7000-7400rpm before I shift to keep the train moving without any lag. I am pretty happy with the upgrade but do miss the snappiness of the smaller turbos in certain driving situations but not enough to put the smaller turbos back on. The extra power is nuts :) If I have time I will do some dyno runs to see exactly how much power is being produced before I put it back in to storage.
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