2_Cams And Engine Simulation, CAMSHAFTS.1

[@capriracer351]

Back in the 90's I bought your book, Desktop Dynos, which I found to be very interesting and informative. Also had software back then that I think might have been from Motion Software. It was on a 3 1/2" diskette!! Just this morning this video showed up in my suggested videos. Glad that it did and will be looking forward to more videos in the future.

[@motionsoftwaresim]

Thanks so much for your continued interest in our software. I really appreciate it!

[@alessandroghizzo972]

@motionsoftwaresim, we Need many other video like this. Many thanks for sharing your knowledge

[@nhra7110]

Great video, Larry! In 2023, I am puzzled why cam card info. is STILL not identified properly - can be confusing!

[@ICTPerformance268]

🇦🇬 After watching video 1 as per your suggestion, am now back. ⭐️⭐️⭐️⭐️⭐️ 🙇🏾‍♂️

[@evcass69]

In the early 2000s, I bought Desktop Dyno 2000, then bought Dyno2003, Drag2003 & FastLap2003. I later got the matching Sim upgrades and trialed DynoSim5. I messed with FL the most, but found the track design implementation very frustrating.

[@motionsoftwaresim]

Thanks for the comments regarding our early software development. Sorry you had issue making custom tracks for Fastlap. I wrote the track-building explanation in the FastLap Sim5 user manual, and I thought came out pretty well, but That was quite a while ago, and it may need some improvement. Thank you for being a customer.

[@mikie9077]

outstanding i've been looking for a video on this subject

[@motionsoftwaresim]

Thanks for the feedback, I appreciate it!

[@Mike62501]

So glad your doing video’s Larry

[@kylecurry6841]

OMG...blast from the PAST, I had the book and DT Dyno (Windows 95).

[@Carl_Jr]

If lash is accounted for when converting lobe lift to valve lift on a solid tappet cam, is plunger depression on a hydraulic lifter accounted for? E.G., I have 7/16"-24 rocker arm studs on my SBC. I preload the lifters 0.025" (1/2 turn). When the engine is operating the internal piston of the hydraulic lifter is compressed until a check valve is employed to close the oil inlet orifice. Since fluid is not compressible the lifter then behaves like a solid tappet, until the pressure is relieved on the closing flank, back to the base circle. Is that moment of compression accounted for in the formula?

[@MustangBranden]

Crazy question: I’m thinking of getting your program to help me with my Harley build: with the exhaust/header part how do I make sure that it’s simulating the proper 45* with a shared con rod.

[@motionsoftwaresim]

Thanks for your question. The cylinder centerline included angle is not directly modeled in the engine simulation. Changes to block design have little effect on the thermodynamic properties that are modeled by our simulations. So, our simulation will model your engine with good accuracy.

[@MustangBranden]

@@motionsoftwaresim I’m not as much worried about the thermal properties and the timing of the exhaust pulses/pressure waves. Mainly for scavenging and collector design.

[@motionsoftwaresim]

The timing of exhaust pulses and pressure waves is established by the valve timing, not crank/rod relationships.

[@melwade3025]

Larry, you were correct. I did garner a lot of information and understanding just in the viewing. So the software can simulate the performance results from varied cam specifications. Can it also recommend the optimal cam specifications or is this obtained through running multiple simulations with incremental changes? Thank you

[@motionsoftwaresim]

Thank you for watching the video! The software also has a feature that will run multiple simulations while varying cam timing to find an optimum result. We call this the Iterator. It will be discussed in an upcoming video. Thanks again.

[@richardprice5978]

@@motionsoftwaresim you left out/forgotten the dodge 5th-gen vipers v10 cam-in-cam so yes LCA ( and VVT ) cam be changed ( and technically you could use the cam design/core for a 1:5 to 2:0 rocker's ratio or down to 1:1 / less than 1 not sure why'd you do it though ) on the fly as i own a 4-th gen cam core but phasers and or manufacturing limits the maximum range the computer or you could command it's about 10* to 20* LCA ,90* probably could have been made but it's not all that useful i got to copy/learning it for my V8 dodge did you remember the multi-air system from dodge? as some people are tuning for more power ect

[@DSRE535]

I still have a lot of your programs, but unfortunately I don’t have anything with windows anymore and you guys were mainly based on windows platform, hopefully in the future I can put this stuff on my iPad! I usedused it a lot and it’s really good information to have for designing and building engines

[@Triple_J.1]

Windows 10 laptops can be found used for $100-200 online auction or pawn shops. Cheap machine compared to $150-$600 powerful software.

[@robertkeime4907]

Great video

[@laytonturpin864]

I thought y’all went away. I haven’t been able to update my simulator for several years. I always get “unable to connect to server”.

[@motionsoftwaresim]

Hi, thank you for leaving a comment. Please contact me at [e-mail] and we’ll try to figure out why you can’t download updates. Thanks again.

[@lowrangeinnovascotia2930]

Had desktop dyno for years until my computer blew up. Just bought the bundle package, dyno/drag/roadcourse and have been wearing out this computer!😂😂

[@ItsA68]

I have been trying to replicate modeling results using 10 point data and comp lobe profile data. (TK lobe profile solid rollers) I assumed that the lobe profile data would provide a more accurate simulation, but in most cases, the hp and torque differ more than 10-15hp/ft-lb between doing the sim with 10 point cam data and the same imported lobe profiles. Should the results be the same? Which is more accurate? Where can I get help online without having to wait on hold for a long time?

[@motionsoftwaresim]

In general lobe profile simulation should be more accurate. But there are quite a number of factors that come into play. Send me an email at [e-mail] and attach the engine file you’re working on and any other cam data that would be helpful. I’ll be happy to look at your set up and see if I can offer any suggestions.

[@jimdouglasgregory]

A video idea. Go through all of your available software package and give us a buyer's guide if you will. Thanks

[@motionsoftwaresim]

That is a good idea. However, I wanted to keep the KZbin videos as “commercial” free as possible. However, over time, I’ll discuss most of the features of the software. Thanks again.

[@andrewrogovets5113]

MORE!!!!!

[@motionsoftwaresim]

Thank you for the encouragement! The next video is a few days away.

[@eltonv8tao]

Can someone point me to free simulation software 🤔

[@Triple_J.1]

None that will do what this will do. (Accurately predict minute changes to 1% of outcome in reality). This is the ledge between

[@Triple_J.1]

I suggest HPwizards Horsepower Estimation tool (online) it is simple but effective for basic estimates. As long as you know Stoichiometry, Lambda, horsepower, and fuel flow rates you can find Volumetric Efficiency. Once that is found, you can hold VE constant, and manipulate other parameters. Or change VE by an estimate of what you expect an upgrade to make (e.g. +3% or 0.03 VE for long tube headers, +0.01 for high flow air filter. Also can play around with Boost, etc.

[@pmd7771969]

Never saw a spinning valve spring. Lol. Bv

[@motionsoftwaresim]

Yes, a lot goes on in high speed dynamics. Also, the valves rotate which helps keep the seats clean. Thanks so much for watching!

[@DynoPete]

$499.95 U.S on special, $650 + shipping Canadian funds. No Thanks

[@motionsoftwaresim]

Wow, that is a lot! Exchange rates! Send an email to [e-mail] and I may be able to provide some suggestions. Thanks for watching the video!

[@Triple_J.1]

Chassis Dyno time is $500/day everywhere in the free world. The best tuners for MoTeC and ProEFI charge $1,000 per day. Plus actual cost of airline ticket and hotel. New turbos are $3,000. If it's the wrong size, you will be lucky to get $2,000 for a used non-returnable item. -$1,000 mistake, plus weeks of time to instal and attempt to tune. Now you gotta hire a pro tuner and Dyno AGAIN to make the new turbo work. With software, the mistakes will be small. Like 0.5" too short of runner length. Or 1% fuel flow difference than expected. Or 5hp less than you thought it would, on a 550hp build. $600 is a bargain, when you can use it to get everything right the first time. I see people spending $600 on aftermarket tuners that are flashed with half a dozen canned tunes that aren't even optimized for their own specific car and mods. Like, wtf?