Cylinder Heads - What Matters Most?
#701
TECH Junkie
iTrader: (2)
Here is what I could find on the Duggy box:
https://ls1tech.com/forums/advanced-...l#post19817418
Jump to post 86
https://ls1tech.com/forums/advanced-...l#post19817418
Jump to post 86
#702
10 Second Club
iTrader: (8)
All of it
+1
Nothing super crazy. One will enjoy a reduction of weight with the changes needed tho.
+1
Nothing super crazy. One will enjoy a reduction of weight with the changes needed tho.
Here is what I could find on the Duggy box:
https://ls1tech.com/forums/advanced-...l#post19817418
Jump to post 86
https://ls1tech.com/forums/advanced-...l#post19817418
Jump to post 86
#704
TECH Senior Member
I hope this is one of K&N's better products....
#705
10 Second Club
iTrader: (8)
It should ram some air. The duggy box is set up to have a filter in it. Besides being carbon that kinda makes it unique to some other ram air get ups. It can be used to dd.
Also the id of the duggy box is much larger and has more volume than anything else.
Also the id of the duggy box is much larger and has more volume than anything else.
#706
Moderator
Thread Starter
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,446
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There is something else too. In that aero test thread the highest pressure point on the car is the nose. Where hio has those air inlets should see about as much pressure as you can get without putting a velocity stack in the middle of the bumper.
I could see the firebird getting a bump due to the nostrils. But a camaro, might need to go through the bumper like that. Nice and stealthy too
I could see the firebird getting a bump due to the nostrils. But a camaro, might need to go through the bumper like that. Nice and stealthy too
#708
TECH Apprentice
I can't believe I missed this thread, but then again I got my Camaro in 2019. So I am bringing this thread back from the grave. I will say since the '90s when I learned how much heads made a difference, I knew that my '01 would need to have good heads.
To add the things that matter
Of minor importance: cfm, port volume
Of high importance: MCSA/CSA, air speeds, pushrod pinch, throat, valve seat forms, valve angle.
To add the things that matter
Of minor importance: cfm, port volume
Of high importance: MCSA/CSA, air speeds, pushrod pinch, throat, valve seat forms, valve angle.
Last edited by SoCalDave; 07-27-2022 at 05:53 PM.
#709
I can't believe I missed this thread, but then again I got my Camaro in 2019. So I am bringing this thread back from the grave. I will say since the '90s when I learned how much heads made a difference, I knew that my '01 would need to have good heads.
To add the things that matter
Of minor importance: cfm, port volume
Of high importance: MCSA/CSA, air speeds, pushrod pinch, throat, valve seat forms, valve angle.
To add the things that matter
Of minor importance: cfm, port volume
Of high importance: MCSA/CSA, air speeds, pushrod pinch, throat, valve seat forms, valve angle.
#710
Trash…
Last edited by Che70velle; 07-29-2022 at 04:17 PM. Reason: Got high and logged on Tech again…
#711
#712
Garbage…
Last edited by Che70velle; 07-29-2022 at 04:20 PM. Reason: Typical non-technical posts about stupid stuff…
#713
Sorry guys…
Last edited by Che70velle; 07-29-2022 at 04:21 PM. Reason: Likes to run his mouth and make no sense…
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jayyyw (07-29-2022)
#715
#716
On The Tree
My agonizing hours of calculus classes were not totally wasted. LOL
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
#717
TECH Apprentice
My agonizing hours of calculus classes were not totally wasted. LOL
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
#718
There's a formula and general porters rules. Ed Curtis said More China BS R&D on the heads below. Super Friend beat the best offered from America with a set.
There's the Head architecture (runner length, valve angle, port pinch, SSR, bowl & throat, spring pad height & size = a longer valve, etc...) add in the Math of the formula...
A TFS 260 or MMS 265 is good for 7k on a ls7... Rules says it just may hold the Tq longer and flat line. Go figure as it's dead due to the size of the port.
There's the Head architecture (runner length, valve angle, port pinch, SSR, bowl & throat, spring pad height & size = a longer valve, etc...) add in the Math of the formula...
A TFS 260 or MMS 265 is good for 7k on a ls7... Rules says it just may hold the Tq longer and flat line. Go figure as it's dead due to the size of the port.
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Tuskyz28 (08-01-2022)
#719
My agonizing hours of calculus classes were not totally wasted. LOL
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
To give a simple example I made up flow numbers for two imaginary heads. Both have the same maximum flow and have the same flow from 0.55 to 0.80.
I summed the flow colum to represent the total amount of air that would flow for one lift cycle. Even though the max lifts are the same and the flows are the same for much of the lift, the total for head B is greater. More air will have been pushed into the cylinder through head B than for head A. On the plots the area of the graph below the lines is greater. This is the "area under the curve". It shows that more total air was pushed into the cylinder.
Imagination with Avg stuff? Once you've got the basics and factor in what heads are used from testing the Formula or as you said your calculus comes into play.. Basics of each head and what's possible with the formula on a head if it's possible. Here's a basic question that I may have given the answer...
Why does some Ls heads have different valve length... the answer is a +
Think of a engine as a Human being and your mouth is the Carb and your throat as the intake, Lungs as the Cylinder heads.
A Bigger Valve will deliver more.. Reason I don't like the F710 small bore head..
it's all about
Cylinder Filling. I ask why does a LT with Lesser flow make more Hp besides the Compression on the avg build?
The LT Runner Size is bigger With less seen flow?
Dry flow vs Wet Flow and Cylinder Filling? Direct Injection I tell you. There's still no 1000 fwhp LT. Lmao
#720
If you know how to size a head that's typically used with or without Wallace you may have gotten something...
#1 rule for this formula is runner length has got to be Known.. And if we raise the runner the length will differ or be longer which will equal to a bigger CC in terms of the port. There's a reason Greg Good said one of the smallest ls7 ports at 2.9 MCSA..
260cc Means Nothing unless we talking about a similar head in runner length or a head with similar valves lengths.
#1 rule for this formula is runner length has got to be Known.. And if we raise the runner the length will differ or be longer which will equal to a bigger CC in terms of the port. There's a reason Greg Good said one of the smallest ls7 ports at 2.9 MCSA..
260cc Means Nothing unless we talking about a similar head in runner length or a head with similar valves lengths.