L98 aluminum head flow numbers
10-27-2003, 07:46 PM
#1
L98 aluminum head flow numbers
Does anyone have the flow numbers for the stock L98 aluminum heads, part number 12556463? I am interested in the numbers for intake and exhaust at 28" of H20 at these valve lift numbers: .100, .200, .300, .400, .500. Neither GM nor Scoggin-Dickey have the information.
David
[Modified by DSKRALL, 9:59 PM 10/28/2003]
David
[Modified by DSKRALL, 9:59 PM 10/28/2003]
10-27-2003, 07:51 PM
#2
Melting Slicks
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Re: L98 aluminum head flow numbers (DSKRALL)
.100 62
.200 116
.300 161
.400 185
.500 195
These are the intake numbers. I don't have the exhaust numbers.
[Modified by flyersfan1088, 6:52 PM 10/27/2003]
.200 116
.300 161
.400 185
.500 195
These are the intake numbers. I don't have the exhaust numbers.
[Modified by flyersfan1088, 6:52 PM 10/27/2003]
10-27-2003, 08:06 PM
#3
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Re: L98 aluminum head flow numbers (DSKRALL)
You sure thats the right PN for the 113 D-ports, or do you want flow numbers for the 128 heads?
My record here shows the PN for the 88-91 as 10185086, casting 10088113
My record here shows the PN for the 88-91 as 10185086, casting 10088113
10-27-2003, 08:38 PM
#4
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Re: L98 aluminum head flow numbers (vader86)
You sure thats the right PN for the 113 D-ports, or do you want flow numbers for the 128 heads?
My record here shows the PN for the 88-91 as 10185086, casting 10088113
My record here shows the PN for the 88-91 as 10185086, casting 10088113
Flow number I have from GM High Performance Mag are
intake
0.05 30.18
0.1 58.23
0.15 90.440002
0.2 116.599998
0.3 158.360001
0.4 185
0.5 193.139999
0.55 193.139999
exhaust
0.05 22.780001
0.1 47.330002
0.15 70.419998
0.2 94.010002
0.3 126
0.4 144.960007
0.5 160.589996
0.55 162.179993
These are a little more conservative than the ones for Desktop dyno.
10-27-2003, 09:30 PM
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Re: L98 aluminum head flow numbers (1MoorTym)
You sure thats the right PN for the 113 D-ports, or do you want flow numbers for the 128 heads?
My record here shows the PN for the 88-91 as 10185086, casting 10088113
Thats right. P/N 12556463 is the part number for the 113 casting used on the ZZ4.
My record here shows the PN for the 88-91 as 10185086, casting 10088113
Thats right. P/N 12556463 is the part number for the 113 casting used on the ZZ4.
10-28-2003, 05:09 PM
#6
Re: L98 aluminum head flow numbers (vader86)
Thanks for the flow numbers. I genuinely appreciate the help I get on this forum. By the way, I corrected my post to read 28" of WATER, not Mercury.
Vader86: I too, double-checked the part number in both the Scoggin-Dickey and GM catalogs, and it is 12556463.
I'll have to check into that GM performance magazine that was mentioned by 1MoorTym.
David
Vader86: I too, double-checked the part number in both the Scoggin-Dickey and GM catalogs, and it is 12556463.
I'll have to check into that GM performance magazine that was mentioned by 1MoorTym.
David
