No Idea, but I mostly do it in this video
I found a few things of interest while doing this, the main one was how close this and the Isky L-475 matched up mainly from what I was seeing and from this forum post. Because of that, I never felt out on a limb. I was worried with the initial viewing of the intake opening @.050 being 4* BTDC, but that post made me feel a good deal better about it.
I also did a @.025 measurement to compare it to how much was shaved off, there was .003 removed from it by the machine shop because of uneven wear on the lobes.
I am only right now, while typing this, realizing how useless that was, I do not have a pre-shave base to compare that to, so it really doesn't matter in the big picture.
I feel I should add that I do not think I did the absolute most accurate job with measuring the cam, but I did get it to within 2* overall.
I am currently having an internal debate to see if I want to advance the cam sprocket 4 degrees. A lot of that debate is coming from the summit racing calculator telling me that the camshaft is currently set to -4 advance.
Also notice how when I add 1 degree to the exhaust opening, everything smooths out.
So I will debate if I want to advance the camshaft, or drive it for 1000 miles with it in the stock 1 pin position.
The parts for this are:
- Camshaft: Nissan Motorsport 99996-E1031 (Racer Brown 325-R-108)
- Valve Springs: Crane 99884-12
- Lash Caps: Isky LC-175
- Retainers: Isky ST1624-12
- Valves: Stock N47
Camshaft Specs @.050
Intake Open 4* BTDC
Intake Close 46* ABDC
Exhaust Open 34* BBDC
Exhaust Close 9* ATDC
LSA 107 (106.8)
Duration 230/223
Intake Centerline 111
Exhaust Centerline 102.5
Overlap: 13*
Intake Max Lift @ valve: .489
Exhaust Max Lift @ valve: .484
Intake Lift @ Cam: .322
Exhaust Lift @ Cam: .322
Calculators Used:
I used two calculators just to verify my own results. After finishing the video, I also did the math. I used the formulas that are provided by Web Camshaft
Predictions:
I should have a camshaft that has a decent power band that starts at around 2800RPM and keeps on till close to 6200RPM.
I should have a camshaft that has a decent power band that starts at around 2800RPM and keeps on till close to 6200RPM.
But there is not a way to be sure yet, I need to get the car on the dyno, so I might be over selling this camshaft.
And this post is going live a day or two before the youtube video.