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Search found 109 matches

by ingram
Tue Sep 15, 2020 9:07 pm
Forum: Engine Tech
Topic: Cam intake lobe vs exhaust lobe
Replies: 11
Views: 1492

Re: Cam intake lobe vs exhaust lobe

I am considering a DOHC motorcycle and maybe this question will apply to other applications. Will someone explain the difference between the profile of a camshaft intake lobe and an exhaust lobe of same lift and duration? And, why there is a difference? I understand that the intake has a different ...
by ingram
Thu Jul 26, 2018 5:02 pm
Forum: Engine Tech
Topic: Camshaft data
Replies: 7
Views: 1041

Re: Camshaft data

Sorry, when I think of cam profile lift tables, everything is at the lobe. One degree rotation at the lobe with the lift at the tappet that the profile is being designed for.
by ingram
Thu Jul 26, 2018 3:56 pm
Forum: Engine Tech
Topic: Camshaft data
Replies: 7
Views: 1041

Re: Camshaft data

Roller using 0.750 wheel diameter and 1.020 base circle diameter. Have fun. :) .00000000 .00000035 .00000536 .00002622 .00007987 .00018743 .00037253 .00065968 .00107270 .00163330 .00235989 .00326670 .00436316 .00565384 .00713881 .00881458 .01067567 .01271691 .01493652 .01734000 .01994411 .02277223 ....
by ingram
Sat Jun 16, 2018 7:12 pm
Forum: Engine Tech
Topic: Cam id help please
Replies: 9
Views: 1765

Re: Cam id help please

cknight wrote: Sat Jun 16, 2018 6:23 pm A Cam Dynamics grind would be 10R, not R10. Perhaps Reed, or early Lunati? Chase
Sorry, not a Reed.
by ingram
Sun Apr 01, 2018 5:54 pm
Forum: Race Cars & Parts - For Sale or Wanted
Topic: Cam wanted
Replies: 2
Views: 2234

Re: Cam wanted

If you have not already, you might join this forum. https://www.jalopyjournal.com/
by ingram
Mon Nov 27, 2017 1:41 pm
Forum: Engine Tech
Topic: Roller cam - radius of curvature
Replies: 12
Views: 1672

Re: Roller cam - radius of curvature

The diameter of the roller wheel used will also affect the radius of curvature in the design process.
by ingram
Sun Oct 22, 2017 5:34 pm
Forum: Engine Tech
Topic: how to adjust valves on ford big block solid roller cam
Replies: 7
Views: 834

Re: how to adjust valves on ford big block solid roller cam

The EOIC approach works for any four stroke poppet valve engine. Exactly, on small cam stuff i simply adjust at tdc on comp stroke, quick simple and fine for shorter duration but not as foolproof on big duration lobes as eoic way. If the piston is at T.D.C. on the compression stroke, both valves ar...
by ingram
Tue Jul 25, 2017 9:47 am
Forum: Engine Tech
Topic: lifter angle
Replies: 8
Views: 1254

Re: lifter angle

There is a difference between an off-set lifter and physically changing the lifter bore angle. Changing the lifter bore angle will also require an expensive custom camshaft based on the new angle.
by ingram
Thu Mar 09, 2017 11:47 am
Forum: Engine Tech
Topic: Solid rollers on LS Hyd cam
Replies: 91
Views: 9970

Re: Solid rollers on LS Hyd cam

When I design a cam profile, it either has hydraulic or solid lifter ramps. The hydraulic ramps are designed for zero lash and the solid ramps are designed for a specific valve lash based on application, rocker arm ratio, and engine components. I will admit that there are some ramp designs that can...
by ingram
Thu Mar 09, 2017 9:22 am
Forum: Engine Tech
Topic: Solid rollers on LS Hyd cam
Replies: 91
Views: 9970

Re: Solid rollers on LS Hyd cam

When I design a cam profile, it either has hydraulic or solid lifter ramps. The hydraulic ramps are designed for zero lash and the solid ramps are designed for a specific valve lash based on application, rocker arm ratio, and engine components. I will admit that there are some ramp designs that can ...
by ingram
Wed Mar 08, 2017 3:05 pm
Forum: Engine Tech
Topic: Solid rollers on LS Hyd cam
Replies: 91
Views: 9970

Re: Solid rollers on LS Hyd cam

CamKing wrote:Bottom Line: If you want to run mechanical roller lifters, run a cam that's designed for mechanical roller lifters. If you think you've got a better idea, then the guys that are designing the cams, you don't.
Well said. =D>
by ingram
Wed Mar 01, 2017 1:23 pm
Forum: Engine Tech
Topic: Cam ID help, please
Replies: 2
Views: 534

Re: Cam ID help, please

I don't recognize it as a Reed number. The name "REED" would also be on the camshaft near the grind number.
by ingram
Thu Oct 06, 2016 9:51 am
Forum: Engine Tech
Topic: 55MM cam core VS. roller lifter wheel
Replies: 8
Views: 1556

Re: 55MM cam core VS. roller lifter wheel

In support of the previous replies, the largest base circle diameter and roller wheel that is physically possible. One of the biggest problems with designing cam profiles is dealing with limitations. Larger base circle diameters and roller wheels help with this. Larger diameter tappet faces also hel...
by ingram
Wed Aug 31, 2016 3:43 pm
Forum: Engine Tech
Topic: Cam With Dwell At Max Velocity Graph
Replies: 48
Views: 4606

Re: Cam With Dwell At Max Velocity Graph

CamKing wrote:Max Velocity of .00158327" per 1/4 degree
Thanks for the reply. Looks good.