Stock 99 LS1 head flow #'s
Stock 99 LS1 head flow #'s Looking for some flow #'s for the stock heads..Im looking at different setups and was wondering if someone had these..
Last edited by House347; Sep 5, 2004 at 12:52 AM. Reason: misspell
From an older post:
From Jay at Absolute Speed
6.0's and ls6 heads dont flow anything alike. Im looking for the flows I have on stock heads all I have are intake flows on 862, 241,806,and ls6 heads through an ls6 intake. I will look for the other flow sheets when I get back to work tommorow
-------241--ls6---806--862{5.3l
200 - 134 -135 - 127 - 128
300 - 185 -186 - 179 - 176
400 - 216 -220 - 212 - 204
450 - 222 -233 - 214 - 213
500 - 226 -238 - 220 - 216
550 - 228 -238 - 220 - 210
600 - 228 -236 - 221 - 210
From Jay at Absolute Speed
6.0's and ls6 heads dont flow anything alike. Im looking for the flows I have on stock heads all I have are intake flows on 862, 241,806,and ls6 heads through an ls6 intake. I will look for the other flow sheets when I get back to work tommorow
-------241--ls6---806--862{5.3l
200 - 134 -135 - 127 - 128
300 - 185 -186 - 179 - 176
400 - 216 -220 - 212 - 204
450 - 222 -233 - 214 - 213
500 - 226 -238 - 220 - 216
550 - 228 -238 - 220 - 210
600 - 228 -236 - 221 - 210
Originally Posted by DaleMX
From an older post:
From Jay at Absolute Speed
6.0's and ls6 heads dont flow anything alike. Im looking for the flows I have on stock heads all I have are intake flows on 862, 241,806,and ls6 heads through an ls6 intake. I will look for the other flow sheets when I get back to work tommorow
-------241--ls6---806--862{5.3l
200 - 134 -135 - 127 - 128
300 - 185 -186 - 179 - 176
400 - 216 -220 - 212 - 204
450 - 222 -233 - 214 - 213
500 - 226 -238 - 220 - 216
550 - 228 -238 - 220 - 210
600 - 228 -236 - 221 - 210
From Jay at Absolute Speed
6.0's and ls6 heads dont flow anything alike. Im looking for the flows I have on stock heads all I have are intake flows on 862, 241,806,and ls6 heads through an ls6 intake. I will look for the other flow sheets when I get back to work tommorow
-------241--ls6---806--862{5.3l
200 - 134 -135 - 127 - 128
300 - 185 -186 - 179 - 176
400 - 216 -220 - 212 - 204
450 - 222 -233 - 214 - 213
500 - 226 -238 - 220 - 216
550 - 228 -238 - 220 - 210
600 - 228 -236 - 221 - 210
Having a cam matched to the heads is what you want. Put in some phone time and get a feel for whats out there. Be ready to tell them what your goals are, street only or autocross or drag. Find a place that can tune it as part of the package.
Dale
Dale
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TECH Enthusiast
Joined: Feb 2004
Posts: 743
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From: Foley, Alabama-southern Alabama
Welcome Hysteria,say you ported your own heads?What did they flow when you were finished?I did some Vortec heads for my sb last year and flow tested them 3 times,learned a lot!! 
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On The Tree
Joined: Aug 2004
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273/210@.650, I just knocked the "ramp" down and blended it into the roof of the port and done the same thing to the rocker arm bolt boss on the side of the runner. I tulip shaped both intake and exhaust valve guide bosses and blended all of that into the rest of the port. Finally I header tube matched the exhaust port except for the bottom side(a d-shape look). I use the truck exhaust valves because they flow about 4 cfm better than the car ones. I have seen around 29x/22x by professional porters so I am not too far of the mark. Also I use a 5/8" carbide tulip shaped cutter so that it is easier to match the ports to each other.
