desk top dyno ?

rod · 02-19-2015, 11:32 PM

I have been using my desk top dyno to see what changes made a difference, and by how much.
I ran across an interesting deal. if I put in figures for a hyd. lifter cam, and get the HP numbers, and then use the same cam numbers, but change to a solid lifter cam, the HP numbers go up 30 to 50 horses. this seems crazy.
your thoughts?
thanks Rod in AZ

Alan Roehrich · 02-20-2015, 01:41 AM

It's not a real good program.

Performance Trends dyno simulators are far better.

Larry Meaux's PipeMax is not really a dyno simulator, but a knowledgeable person can use it that way.

To me, even Comp Cams cam selection software (Cam Quest) is more accurate than those old cheap programs.

All dyno simulators are "garbage in, garbage out", meaning even the best of them yield useless results unless you feed them good valid data to work with.

Dwight Southerland · 02-20-2015, 08:55 AM

Engine Pro/Quarter Pro have selections for "High Rate Hydraulic" camshafts that includes calculations that target stocker-type hydraulic camshafts. It does a pretty good job.
http://quarterjr.com/engine_pro.htm

02-19-2015, 11:32 PM	#1
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 313 Likes: 0 Liked 20 Times in 15 Posts	desk top dyno ? I have been using my desk top dyno to see what changes made a difference, and by how much. I ran across an interesting deal. if I put in figures for a hyd. lifter cam, and get the HP numbers, and then use the same cam numbers, but change to a solid lifter cam, the HP numbers go up 30 to 50 horses. this seems crazy. your thoughts? thanks Rod in AZ

02-20-2015, 01:41 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,066 Likes: 1,486 Liked 1,630 Times in 378 Posts	Re: desk top dyno ? It's not a real good program. Performance Trends dyno simulators are far better. Larry Meaux's PipeMax is not really a dyno simulator, but a knowledgeable person can use it that way. To me, even Comp Cams cam selection software (Cam Quest) is more accurate than those old cheap programs. All dyno simulators are "garbage in, garbage out", meaning even the best of them yield useless results unless you feed them good valid data to work with. __________________ Alan Roehrich 212A G/S

02-20-2015, 08:55 AM	#3
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,996 Likes: 63 Liked 756 Times in 189 Posts	Re: desk top dyno ? Engine Pro/Quarter Pro have selections for "High Rate Hydraulic" camshafts that includes calculations that target stocker-type hydraulic camshafts. It does a pretty good job. http://quarterjr.com/engine_pro.htm __________________