Speedway Engine Valve Spring Rate Tester Tool

Just what I needed

A great product for the tool box when up-grading or replacing springs

I'll be buying more again.

I am teaching students about spring pressure for aircraft cylinders

Accurate Readings

I checked it with a Comp Cams calibration spring. It read the same rate as the calibration spring said that it should. Of course, the gauge only has 5 lb increments, but judging by the distance between the 5 lb increments, it read the same as the calibration spring. I then checked it with a brand new Brodix spring with 240 seat pressure at 1.950. It read 240. I had to use the retainer and add the width of the retainer because it was a dual spring. I found the best way to get the added width was to place the retainer on a height mike and measure the overall distance with a digital caliper. Then I used the digital caliper to measure the inside distance on the pressure tester. It is notched, so that you can get the digital caliper square and flat to take an accurate measurement.

Ok, but hard to stay centered

Not bad overall. But the base that measures the pressure moves. It doesn't stay centered so it is hard ti get an accurate measurement. One side will read a different distance than the other.... If I had to do it iver, I would not buy it again. I have seen a few that were only $100 more then this one that look much better. This unit is very hard to use .. Kyle

Terrific tool !!!!!

A great and inexpensive tool for checking valve springs.

Good Option

I think it works great for the applications I need it for, and the shipping was fast. Thank You.