LQ4 Build Questions.
Oct 20, 2020 | 11:17 AM
#33
Ok, I think what you're referring to is not a typical cam design, but a special case where someone is trying to work around a spec limit to fit within a particular race class either circle track or drag. In that case, they accelerate the lift really quick and then have a rapid transition to keep a long dwell at the nose to make up for the lack of lift. In that case, yes.
However without this restriction, they don't design with a such a rapid change, so low lift doesn't automatically translate to faster initial ramp rates.
I was saying the shorter duration for same equivalent lift has the faster ramp rate. See the illustration in my post. They have the same total lift, but the dotted line on the exhaust side for example, has a faster ramp rate. And that rapid transition of the nose, will further stress the valvetrain.
However without this restriction, they don't design with a such a rapid change, so low lift doesn't automatically translate to faster initial ramp rates.
I was saying the shorter duration for same equivalent lift has the faster ramp rate. See the illustration in my post. They have the same total lift, but the dotted line on the exhaust side for example, has a faster ramp rate. And that rapid transition of the nose, will further stress the valvetrain.
I get what you're saying about the ramp rate.
As for the rest, who knows, I only know enough about this to be dangerous. I need to look into it more so I can actually add helpful info lol.
Oct 20, 2020 | 05:50 PM
#34
Shlumpt
Joined: Nov 2019
Posts: 4,450
Likes: 1,522
From: Shlumpt, TX
Semi sarcasm. The true best way to make a purchase is find someone who has a similar setup and drive their vehicle if they let you. Personally I trust the computer dyno. An engine is just math. A computer dyno is just taking the numbers you put in and putting a math output.
I trust the computer or I trust trucks I can see/drive. I personally don’t trust word of mouth when deciding what to put in my engine.
I trust the computer or I trust trucks I can see/drive. I personally don’t trust word of mouth when deciding what to put in my engine.
Oct 20, 2020 | 05:54 PM
#35
Thread Starter
Registered User
Joined: Oct 2020
Posts: 12
Likes: 0
Semi sarcasm. The true best way to make a purchase is find someone who has a similar setup and drive their vehicle if they let you. Personally I trust the computer dyno. An engine is just math. A computer dyno is just taking the numbers you put in and putting a math output.
I trust the computer or I trust trucks I can see/drive. I personally don’t trust word of mouth when deciding what to put in my engine.
I trust the computer or I trust trucks I can see/drive. I personally don’t trust word of mouth when deciding what to put in my engine.
Oct 20, 2020 | 05:58 PM
#36
Shlumpt
Joined: Nov 2019
Posts: 4,450
Likes: 1,522
From: Shlumpt, TX
Oh and by the way I'm not trynna diss anyone I feel most of you know what you are talking about 
@70CST I went with the 212/218 low lift cam over the others because it was $100 cheaper and was only 10(?) hp less than the others also because I had some ls6 springs and didn't want to buy new springs. So I used that $100 I saved and threw it at some lifters and some other stuff. Not saying go cheap but I am just saying.
@70CST I went with the 212/218 low lift cam over the others because it was $100 cheaper and was only 10(?) hp less than the others also because I had some ls6 springs and didn't want to buy new springs. So I used that $100 I saved and threw it at some lifters and some other stuff. Not saying go cheap but I am just saying.
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