Any dyno or ET numbers?
The 2UZFE heads and crank are different, but not readily available here in Oz, and cams and manifolds are here off the shelf. That is the main reason for using this combo - as drag racing tends to use parts up pretty quick.
Will have detailed info later on the under bucket shim conversion we did using off the shelf RB26 Nissan parts that fit in.
I'd be interested to hear about this shim under bucket, especially if you can run high lift cams (13mm) without any special race coatings
What is the lift/duration of the cams you are using if you don't mind giving out that info, or at least info enough to disclose what type of base pressure/area your buckets are receiving? Do the nissan parts have special coatings on them or anything? I hope those parts will fit a 2uz head as well!
Our application is racing obviously. We run .470" lift with 320 degrees duration, 2UZFE buckets and 100 lb Crow single race springs.
I used the RB26 valve spring retainers because the 2UZFE retainers are too small in diameter (2UZFE springs are much smaller than 1UZFE) and did not fit the Crow springs. The RB26 retainers fit perfectly and were cheap and on the shelf at the local Nissan dealer. When we went to assemble the valves, we found the 1UZFE collets placed the retainer at the wrong height - RB26 collets fixed that. Interestingly we tried the RB26 bucket in the hole - and it fits exactly (and has a larger area under the bucket in the boss area for the shim). We had to mill .040" out of the spring base area, because the springs coil bound .020" after max lift (.060" recommended). With custom made shims the assembly went together nicely - although we do not run valve seals. You would have to check that clearance first. With only one run on the engine, we will be watching these details and wear patterns closely.
What is the latest on the 5.7 engine - is that coming out? I would love those extra cubes.