All right guys,
Alex Avery from zcar.com has posted the following info on his research for converting the hydraulic lifters on a P90a to solid:
Alex says...
Just wanted to report the result of my efforts to find a cheap alternative to convert P90A hydraulic lifter head to solid lifters. It can be easily accomplished for about $35 bucks.
Because the hydraulic lifter bosses are already WAY countersunk, you only need to buy 12 20mm Timesert thread inserts for $2.71 each (+shipping) rather than the expensive tool kit (which includes a thread tap, insert countersink tool, and thread locking tool you won't use).
When you get the threaded inserts from Timesert:
1. Remove the hydraulic lifters
2. Thread the Timesert inserts into the lifter bosses until they bottom out
3. Install solid lifters.
The solid lifters are a LOT shorter than the hydraulic lifters. The hydraulic lifter bosses are pre-countersunk in a way, as the threads are only at the bottom of the lifter boss. So the threaded insert when installed is below the top-deck of the head. The solid lifters aren't as long as the hydraulic lifters, so they only engage the thread inserts in the first 5-6 threads. But seeing as the lifters see only compression forces, not tension forces, 5-6 threads are plenty to hold the lifters into the head.
I took lots of pics and will post a short, well illustrated "how-to" article on the net when I find the time. So all those P90A heads out there should now be considered viable and cost-effective alternatives to P79s.
Details:
http://www.timesert.com
The Timesert item number is 18153 (M18x1.5x18.3 INSERT)
Time Fastener Co
5301 Longley Lane
Reno, NV 89511
(775) 829-1026
I have these and used the solid lifters from a P79... works like a charm!
Be sure to drop by zcar.com and thank Alex!
Jay