Search found 122 matches
- Fri Mar 15, 2024 5:07 pm
- Forum: Engine Tech
- Topic: FE Ford lifter bank angle?
- Replies: 9
- Views: 571
Re: FE Ford lifter bank angle?
90-degrees from one lifter bore across the top of the block to the other lifter bore. Same as the cylinder bore.
- Wed Oct 25, 2023 1:57 pm
- Forum: Engine Tech
- Topic: Harley Twin Cam not getting oil to the top end.
- Replies: 2
- Views: 220
Re: Harley Twin Cam not getting oil to the top end.
New pushrods can have trash in them blocking the oil flow. A good mechanic will always check for this but you never know.
- Tue Apr 04, 2023 8:42 pm
- Forum: Engine Tech
- Topic: Camshaft lobe lift accuracy?
- Replies: 32
- Views: 2527
Re: Camshaft lobe lift accuracy?
Your measuring technique is causing the error. When measuring across the base circle diameter, you are also picking up some of the actual cam profile. Basically part of the opening and closing ramps are also being measured. I assume this is a roller cam profile, sometimes this technique will work o...
- Tue Apr 04, 2023 7:12 pm
- Forum: Engine Tech
- Topic: Camshaft lobe lift accuracy?
- Replies: 32
- Views: 2527
Re: Camshaft lobe lift accuracy?
Your measuring technique is causing the error. When measuring across the base circle diameter, you are also picking up some of the actual cam profile. Basically part of the opening and closing ramps are also being measured. I assume this is a roller cam profile, sometimes this technique will work on...
- Sat Feb 25, 2023 7:46 pm
- Forum: Engine Tech
- Topic: Camshaft Duplication
- Replies: 13
- Views: 1193
Re: Camshaft Duplication
Does anyone know if it's possible to exactly duplicate a camshaft profile by copying the lobes of an existing camshaft without access to the design files or old lobe masters?? Thanks! "exactly duplicate a camshaft profile" The short answer is no. The lift table on a cam profile design is ...
- Sun Oct 30, 2022 1:23 pm
- Forum: Engine Tech
- Topic: Lobe design revisions
- Replies: 31
- Views: 2317
- Fri Oct 28, 2022 7:07 pm
- Forum: Engine Tech
- Topic: Lobe design revisions
- Replies: 31
- Views: 2317
Re: Lobe design revisions
The various Camshaft companies used to hire Harold Brookshire "UDHAROLD" to design new cam lobe designs from scratch for that cam company. He'd design a whole bunch of durations version from small to big "shoe size" within that cam design family. Then they'd give it a fancy adve...
- Fri Oct 28, 2022 5:45 pm
- Forum: Engine Tech
- Topic: Lobe design revisions
- Replies: 31
- Views: 2317
Re: Lobe design revisions
The various Camshaft companies used to hire Harold Brookshire "UDHAROLD" to design new cam lobe designs from scratch for that cam company. He'd design a whole bunch of durations version from small to big "shoe size" within that cam design family. Then they'd give it a fancy adve...
- Fri Oct 28, 2022 12:23 pm
- Forum: Engine Tech
- Topic: Lobe design revisions
- Replies: 31
- Views: 2317
Re: Lobe design revisions
What is it that you think is changing in cam profile designs. Cam profiles are created using mathematical formulas. Is the math different today than it was years ago? Do you get different results from the same equations if you use a modern computer? As far as pushing the envelope with maximum veloci...
- Sat Jul 23, 2022 8:43 pm
- Forum: General Tech
- Topic: 4l60e 3-2 downshift solenoid
- Replies: 2
- Views: 1654
Re: 4l60e 3-2 downshift solenoid
Here is a good guy I have done business with. He will be able to answer your questions and sell you the correct components.
http://transmissionbench.com/index.html
http://transmissionbench.com/index.html
- Fri Jul 22, 2022 5:01 pm
- Forum: Engine Tech
- Topic: Intake closing
- Replies: 130
- Views: 7081
Re: Intake closing
Intake closing determines the dynamic compression ratio, pretty important to know.
- Mon Feb 21, 2022 3:10 pm
- Forum: Engine Tech
- Topic: Plastic Camshaft
- Replies: 13
- Views: 1593
Re: Plastic Camshaft
Interesting, that's a new one for me. I would guess the polymer pieces are 3-D printed. New method for creating sample cam profiles.
- Wed Jan 05, 2022 3:34 pm
- Forum: Engine Tech
- Topic: Camshaft lobe designers
- Replies: 56
- Views: 6586
Re: Camshaft lobe designers
A bunch of them went to Harvey Crane's Cam Design school, and used his cam design software. Others just use one of the other cam design programs that are available. Very, very few have their own proprietary cam design software. Well looking at stuff from a few, a lot of them look very similar. Some...
- Tue Sep 15, 2020 9:07 pm
- Forum: Engine Tech
- Topic: Cam intake lobe vs exhaust lobe
- Replies: 11
- Views: 2918
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 ...
- Thu Jul 26, 2018 5:02 pm
- Forum: Engine Tech
- Topic: Camshaft data
- Replies: 7
- Views: 1514
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.