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I get that Tuskey, but again if you use a factory style plastic intake for either head it shows that things or Close. Whether it's a Aftermarket or a ported Factory intake.
Now if we can get some Real flow there to the heads with a more race style intake.....
Gap Sauce. Cathedral head loss in Tq which is the first thing guys will say besides the HP. It's what we refer to as having enough flow and more CSA to supply the head what it needs to fill the cylinder. Same test on the link with say a MSD would close the top on the Gap Sauce. Now what does this tell us? That the bigger CSA head wants a bigger CSA runner intake manifold with more Plenum.....aka Holley high ram, CID or 4500 style intake. You kill the rectangle head with a plastic intake, which the test showed. TFS 260 Ls7 head test vs the TFS 245 with the plastic intake on a 427 made things close.
Place a more race style intake on the same test would result in getting out some more Gap Sauce.
Old news. Saw that article a couple years ago and it was talked about here on Tech at that time. Still doesn’t sway people’s minds about what they prefer. Data doesn’t lie, but most folks don’t care. Everyone knows that a cathedral makes more torque right? Me? I take a lot of cars with cathedrals to Gapplebees on the weekends with my square ports. Combination is everything.
1st time I saw or read it myself.
🤔 If I had seen this I'd been used it as a reference for the debate along with the 427 TFS cathedral / Ls7 heads test. It shows the difference in intake choice in the great debate of which is better.
🤣 If your going or will stay with a Factory style intake? Cathedral Port
if you may or plan to move to a more race style intake manifold? Rectangular Port
just got thru texting D about some products and cost. Chevelle you know it was about cylinder heads!!!! 😂🤣Went along the lines of how much to develop and make a port: Smaller version of the Mozez,DR/CT? Dumbest question asked is the one Never asked🤫. Got my answer 😉
This is me being bored😂🤣
1st time I saw or read it myself.
🤔 If I had seen this I'd been used it as a reference for the debate along with the 427 TFS cathedral / Ls7 heads test. It shows the difference in intake choice in the great debate of which is better.
🤣 If your going or will stay with a Factory style intake? Cathedral Port
if you may or plan to move to a more race style intake manifold? Rectangular Port
just got thru texting D about some products and cost. Chevelle you know it was about cylinder heads!!!! 😂🤣Went along the lines of how much to develop and make a port: Smaller version of the Mozez,DR/CT? Dumbest question asked is the one Never asked🤫. Got my answer 😉
This is me being bored😂🤣
Darth it's the 1st one ported that cost for either, after that it's typical cost for the CNC machine work. It's a 50-50 type deal you damned if you do type of thing... I just wanted to know cost, for later use as a reference for someone if needed. I finally found Dual Quad Dave a set of heads 👍 kinda took a little longer than normal. BTW GG CID medium bore Ls7's FTW. You know I love cylinder heads.
😉
I can't help it.... knowledge is free and I does love cylinder Heads. Lots of Porters on the facebook link provided and the thread😉🤐. There's big cylinder filling talked about 🤐🤫😉👍500+cfm worth.😉 That damn Corona 🤬
Damn.....I can't get no damn rest. Raining on the Louisiana coast so I'm at home. But another damn 400 cfm head > AFR LS3 using a 2.165 valve 👀 by Hooper. Work with me here. I can't post a link to the man's business.
Damn.....I can't get no damn rest. Raining on the Louisiana coast so I'm at home. But another damn 400 cfm head > AFR LS3 using a 2.165 valve 👀 by Hooper. Work with me here. I can't post a link to the man's business.
A real Cathedral vs Rectangle port test! No Bottle necks so let's see how it goes...Hint 🤫 cathedral loss, Tq also, vs the larger port which Supposedly hurts velocity. Figure when you place a a bottle neck on things it Helps the smaller port Cathedral.
LMAO 😂🤣
go read and look @ the link. Bottle neck saves the Cathedral. When we can get the air and flow there cathedral is dead on Site. LMAO!
Didn't list it, Bortous°...FB friends with most of these guys some I just follow <(example: Me and Darin but, can call or text quicker.) (Bortous what I have told you)......I can ask for the CC or MCSA > for you< But not my thing...if you've seen one Ls1/7/3 head you've Seen them all.
!!!!!!CSA matched to the combination B°ortous. What if that's with a 4.125 test bore but being used in a 8800rpm 6.2 Ls3 combination. Hmmmmm. This means that a certain amount of area is used to get the rpm point.🤫😉 For a given size and RPM a given size head must match Not Dependant on Port CC. I gave you the YB thread with port length, Now°AFR head runner length won't be that much different...use wallace Calculator You know the AFR starts at 255cc get the MCSA and CSA 🤔 Hooper added say 262cc.
Do the math. You can get a damn good idea of what the heads starts at for a combination Size and RPM to where it will be, same combination Size and it's new Rpm point. The Productive way of spec'ing a head for a Combination. < Easy math....
B. I'm texting Hooper and I'm gonna ask him the CSA & or MCSA. You gonna Tell me the CC. <🤐
Let's see, Text just sent.
Fun and Learning game.
My slow behind didn't think to download a pic (update me Scotty) 😞
Didn't list it, Bortous°...FB friends with most of these guys some I just follow <(example: Me and Darin but, can call or text quicker.) (Bortous what I have told you)......I can ask for the CC or MCSA > for you< But not my thing...if you've seen one Ls1/7/3 head you've Seen them all.
!!!!!!CSA matched to the combination B°ortous. What if that's with a 4.125 test bore but being used in a 8800rpm 6.2 Ls3 combination. Hmmmmm. This means that a certain amount of area is used to get the rpm point.🤫😉 For a given size and RPM a given size head must match Not Dependant on Port CC. I gave you the YB thread with port length, Now°AFR head runner length won't be that much different...use wallace Calculator You know the AFR starts at 255cc get the MCSA and CSA 🤔 Hooper added say 262cc.
Do the math. You can get a damn good idea of what the heads starts at for a combination Size and RPM to where it will be, same combination Size and it's new Rpm point. The Productive way of spec'ing a head for a Combination. < Easy math....
Ask for the cc port volume too.
You really helped me understand the MCSA but I still like to know the port volume also.
Nope not gonna do it 😴....Your behind is gonna give me a Precision number on a given size/rpm and it's choke point While getting how much >CC< it has and matching what's been done to the same heads . Naw you can gawn over to Hooper Heads and ask your yourself... Which is too Easy. Call or text...
10-22-2020, 06:27 AM
