Fast 102 Ported & Stock Flow Numbers
Thread Starter
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
Fast 102 Ported & Stock Flow Numbers
Flowed our LS2, 243 CNC'd head on a 4.00" bore. Runner volume is ~225 cc and these are with 2.00" intake valves. These are going on a project here and since we have a few of the new 102's, I figured it was appropriate to update the flow numbers.
So, we started by flow testing the head and then went at swapping intakes and eventually we ended with the ported version of the 102.
Chart was done in excel and the actual data is below. Next I need to measure the volumes of each intake and I'll post that.
Here's the raw data..
Cylinder Head (RPM - CNC 243 casting - 4" Bore)
.100 71.4
.200 152.2
.300 219.6
.400 256.0
.500 285.3
.550 300.9
.600 309.9
.650 314.4
LS2 - Stock Intake
.100 72.2
.200 149.2
.300 204.4
.400 227.4
.500 248.3
.550 262.7
.600 264.1
.650 268.6
LS6 Stock Intake
.100 72.2
.200 141.7
.300 204.4
.400 227.4
.500 247.7
.550 256.0
.600 260.5
.650 269.5
Fast 92 - Stock
.100 71.4
.200 144.7
.300 205.9
.400 235.7
.500 259.0
.550 270.8
.600 272.6
.650 276.2
Fast 102 - Stock
.100 74.4
.200 150.7
.300 211.9
.400 241.7
.500 265.6
.550 271.7
.600 274.0
.650 278.4
Fast 102 - Ported
.100 73.7
.200 150.7
.300 213.7
.400 244.1
.500 269.2
.550 280.7
.600 286.5
.650 291.9
So, we started by flow testing the head and then went at swapping intakes and eventually we ended with the ported version of the 102.
Chart was done in excel and the actual data is below. Next I need to measure the volumes of each intake and I'll post that.
Here's the raw data..
Cylinder Head (RPM - CNC 243 casting - 4" Bore)
.100 71.4
.200 152.2
.300 219.6
.400 256.0
.500 285.3
.550 300.9
.600 309.9
.650 314.4
LS2 - Stock Intake
.100 72.2
.200 149.2
.300 204.4
.400 227.4
.500 248.3
.550 262.7
.600 264.1
.650 268.6
LS6 Stock Intake
.100 72.2
.200 141.7
.300 204.4
.400 227.4
.500 247.7
.550 256.0
.600 260.5
.650 269.5
Fast 92 - Stock
.100 71.4
.200 144.7
.300 205.9
.400 235.7
.500 259.0
.550 270.8
.600 272.6
.650 276.2
Fast 102 - Stock
.100 74.4
.200 150.7
.300 211.9
.400 241.7
.500 265.6
.550 271.7
.600 274.0
.650 278.4
Fast 102 - Ported
.100 73.7
.200 150.7
.300 213.7
.400 244.1
.500 269.2
.550 280.7
.600 286.5
.650 291.9
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
Porting the 102
Charlie I can see where porting will show gains in the Flows on the 102
on A 243 HEAD. As far as aftermarket ( Trick Flow 225) There is very little to be done if that head was to be used for A before and after porting
for the 102. It would have been A more complete picture if you had A
PORTED 92 in there because its common kmowledge the FAST 92 gains
nicely from porting. If you feel the PORTING on the102 will gain from porting with TRICK FLOW 225 please PM me for I am in the process of comparing the 102 to the FAST 92 units.
on A 243 HEAD. As far as aftermarket ( Trick Flow 225) There is very little to be done if that head was to be used for A before and after porting
for the 102. It would have been A more complete picture if you had A
PORTED 92 in there because its common kmowledge the FAST 92 gains
nicely from porting. If you feel the PORTING on the102 will gain from porting with TRICK FLOW 225 please PM me for I am in the process of comparing the 102 to the FAST 92 units.
Le Mans Master
Joined: Oct 2006
Posts: 5,078
Likes: 19
From: Cumming, GA
Charlie I can see where porting will show gains in the Flows on the 102
on A 243 HEAD. As far as aftermarket ( Trick Flow 225) There is very little to be done if that head was to be used for A before and after porting
for the 102. It would have been A more complete picture if you had A
PORTED 92 in there because its common kmowledge the FAST 92 gains
nicely from porting. If you feel the PORTING on the102 will gain from porting with TRICK FLOW 225 please PM me for I am in the process of comparing the 102 to the FAST 92 units.
on A 243 HEAD. As far as aftermarket ( Trick Flow 225) There is very little to be done if that head was to be used for A before and after porting
for the 102. It would have been A more complete picture if you had A
PORTED 92 in there because its common kmowledge the FAST 92 gains
nicely from porting. If you feel the PORTING on the102 will gain from porting with TRICK FLOW 225 please PM me for I am in the process of comparing the 102 to the FAST 92 units.
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Instructor
Joined: Oct 2006
Posts: 124
Likes: 1
From: Valencia CA
Melting Slicks
Joined: Jun 2006
Posts: 2,164
Likes: 3
Melting Slicks
Joined: Aug 2000
Posts: 2,612
Likes: 828
From: Phoenix, AZ USA
Great info Charlie...it would be awesome to see back to back dyno tests. I have heard from a very reliable cylinder head porter that flow numbers don't tell the whole story on intake manifolds.
Instructor
Joined: Oct 2006
Posts: 124
Likes: 1
From: Valencia CA
Got my intake back from RPM, the porting work is amazing. Painted it at my body shop yesterday, flat black w/ a nice coat of matte clear to keep it from flaking. Here's some shots of the process I went through removing the lettering--which was quite thick. Used a dremel to grind them down, then 100-400 grit sand paper, then it was primed/painted/matte clear.
Just need to make an appointment with RPM to get it installed and dyno'd. It's going on a 04 GTO (LS1). I currently make 437/398, anything around 450-460 rwhp and I'll be happy.
Just need to make an appointment with RPM to get it installed and dyno'd. It's going on a 04 GTO (LS1). I currently make 437/398, anything around 450-460 rwhp and I'll be happy.
Melting Slicks
Joined: Jun 2006
Posts: 2,164
Likes: 3
Got my intake back from RPM, the porting work is amazing. Painted it at my body shop yesterday, flat black w/ a nice coat of matte clear to keep it from flaking. Here's some shots of the process I went through removing the lettering--which was quite thick. Used a dremel to grind them down, then 100-400 grit sand paper, then it was primed/painted/matte clear.
Just need to make an appointment with RPM to get it installed and dyno'd. It's going on a 04 GTO (LS1). I currently make 437/398, anything around 450-460 rwhp and I'll be happy.
Just need to make an appointment with RPM to get it installed and dyno'd. It's going on a 04 GTO (LS1). I currently make 437/398, anything around 450-460 rwhp and I'll be happy.
