High Performance Cams and Valve Trains Book Billy Godbold

[SchmidtMotorWorks]

https://chat.openai.com/

[Tom68]

Arrived today.

20230607_190024.jpg

[bob460]

Arrived today.

20230607_190024.jpg

Since it's the long weekend here, when you finish it send it my way.....lol

[FuelieNova]

You can also sign up for BARD, googles AI.
I write a lot of software and ask it questions on how to program and it answers them perfectly.
Tom

[Tuner]

You can also sign up for BARD, googles AI.
I write a lot of software and ask it questions on how to program and it answers them perfectly.
Tom

As always computers will be, GI=GO.

[HQM383]

You can also sign up for BARD, googles AI.
I write a lot of software and ask it questions on how to program and it answers them perfectly.
Tom

As always computers will be, GI=GO.

Just like the human mind.

[SchmidtMotorWorks]

As always computers will be, GI=GO.

The technique is called "prompt engineering".
https://www.youtube.com/watch?v=Bq-ncjOGeVU

If you learn how to ask questions, it is stunning what it can tell you.

Just the other day I needed a way to code a small program to get a bit of information out of an NX part model and put it on the clipboard so that it could be pasted in another document.
The technique to do it isn't in any documentation anywhere.
In 4 tries ChatGTP figured out a way to do it.

[NewbVetteGuy]

Where does one find this chatGTP that you speak of?

You can use https://chat.openai.com but you have to create a login.
You can also just use bing.com from Edge browser on Windows and click on "Chat" at the top, or the Bing app installed in mobile.

Like SchmidtMotorWorks, said, you need to learn how to ask good questions ("prompt engineering").


You can feed models like this custom information to get custom answers, but ALWAYS remember that you should ONLY feed them information or data that you're comfortable sharing with the whole world, as these models tend to "remember" and will "blab" whatever you tell them with others, potentially. Never put sensitive information or your private Intellectual Property into them, because it's potentially "gone" as soon as you do.



Adam

[CamKing]

Can we get this back on topic, so I don't have to lock the thread ?

[Tuner]

Can we get this back on topic, so I don't have to lock the thread ?

I would sure rather have you pick a cam and have your advice than let AI do it.

[bob460]

This would be good...........

Billy Godbold and EFI University

https://scontent.fmel7-1.fna.fbcdn.net/ ... e=64885ABB

[Tom68]

Page 153
"If we have proven that every cam being a Turbo cam is failed Logic"

Anybody know where we proved the above statement in the book ?

[hoffman900]

Page 153
"If we have proven that every cam being a Turbo cam is failed Logic"

Anybody know where we proved the above statement in the book ?

“If we have proven that every cam being a turbo cam is faulty logic, we can just as easily disprove that every cam is a solid. I design both hydraulic and solid the same, except…”

I think the rest of the book that precedes it proves it’s faulty logic. What is a “turbo” cam anyway? Maybe Billy should have put turbo cam in rhetorical quotes.

[Tom68]

Gotcha, he hasn't necessarily put it in one paragraph but his valve events differences explained elsewhere for Turbo motors adds up to proof.

Basically an opportunity to have a dig at RHs often used statement that "every cam is a turbo cam" I think we all know that Richard is stating they all work with Turbos for a WOT pull on the dyno and if you want your street motor to have decent unboosted performance pick the NA cam that suits and enjoy the boost on the odd occasion that you use it.

Now a race motor or a pissant 1.4 litre street engine in a SUV is going to be using boost a lot, so it will need very specific boost valve event timing.

[hoffman900]

Gotcha, he hasn't necessarily put it in one paragraph but his valve events differences explained elsewhere for Turbo motors adds up to proof.

Basically an opportunity to have a dig at RHs often used statement that "every cam is a turbo cam" I think we all know that Richard is stating they all work with Turbos for a WOT pull on the dyno and if you want your street motor to have decent unboosted performance pick the NA cam that suits and enjoy the boost on the odd occasion that you use it.
Now a race motor or a pissant 1.4 litre street engine in a SUV is going to be using boost a lot, so it will need very specific boost valve event timing.

I have no idea who Richard Holdner is tbh, but I think from Billy’s perspective, from a mass flow standpoint (independent of thermal considerations) the pressure ratios are what matters. IE: intake port pressure vs exhaust port pressure. Modern designs and better packaging will have less back pressure for a given boost level and require something different. A design that uses a variable gate turbo is going to vary all ovet the place. A Formula One engine where it opens the wastegate at “all in power” to reduce pumping losses and let the electrical component of the MGU-H spin the turbo instead is going to be different.


It’s no different than what Honda found with their single cylinder vs multi-cylinder V8 F1 engine:

407713B3-7662-4845-BD04-22EE12CCD321.jpeg

In their case, with the multi-cylinder exhaust, residual pressure in the collector changes the pressure the engine “sees” when the exhaust valve opens. They talk of changing the port, but obviously cam timing can be impacted. Honda doesn’t talk about that but it doesn’t mean they didn’t make changes. It really makes one thing and shows how critical this all is, and most don’t have any idea what they’re bolting on or designing impacts this short of owning something like TFX or other port pressure measuring equipment.