Trickflow vs AFR on 3.90 bore flow numbers
11-02-2005, 07:28 PM
#1
Trickflow vs AFR on 3.90 bore flow numbers Just had a chance to flow the new TFS LS1 head, it has a 13.5 degree valve angle and relocated spark plug to enhance the mid lift flow with a smaller valve, these had 2.04/1.57 valve diameters. This is the most impressive head we have seen on a 3.90 bore. The chamber measures around 3.950" across, so it is designed to be optimum on a 3.90 bore. 
All flow numbers off our bench.
Lift............AFR 205...........AFR 225...........TFS 215
.100............64...................68........... ........69
.200............140.................149........... ......139
.300............203.................220........... ......219
.400............250.................269........... ......261
.500............282.................306........... ......304
.550............296.................315........... ......314
.600............303.................305........... ......325
With this head having this much all around flow and being designed specifically for a 3.90 bore we anticipate it should be the most powerful 3.90 bore head money can buy, and it has TONS of piston to valve clearance. It has about .050" more P to V then our 5.3 Stg 1.5 head. I have flow numbers off the new Dart heads, but they were not as good as the AFR 205. Enjoy!
Almost forgot, this is with absolutely NO hand finish work.
All flow numbers off our bench.Lift............AFR 205...........AFR 225...........TFS 215
.100............64...................68........... ........69
.200............140.................149........... ......139
.300............203.................220........... ......219
.400............250.................269........... ......261
.500............282.................306........... ......304
.550............296.................315........... ......314
.600............303.................305........... ......325
With this head having this much all around flow and being designed specifically for a 3.90 bore we anticipate it should be the most powerful 3.90 bore head money can buy, and it has TONS of piston to valve clearance. It has about .050" more P to V then our 5.3 Stg 1.5 head. I have flow numbers off the new Dart heads, but they were not as good as the AFR 205. Enjoy!
Almost forgot, this is with absolutely NO hand finish work.
Last edited by Brian Tooley Racing; 11-04-2005 at 09:19 PM.
11-02-2005, 07:53 PM
#3
TECH Regular
Join Date: Oct 2005
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
What do you use for intake port radius? Your 225 AFR data is substantanily lower (305 vs. 320) @ 0.600" than their posted numbers: http://www.airflowresearch.com/ , but the rest of the 225 and the 205 data is similar.
Update: Oops! I see they test the 225 on a 4.125" bore...
Update: Oops! I see they test the 225 on a 4.125" bore...
11-02-2005, 08:34 PM
#6
Teching In
Join Date: Jan 2003
Location: nm
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Brian Tooley
Just had a chance to flow the new TFS LS1 head, it has a 13.5 degree valve angle and relocated spark plug to enhance the mid lift flow with a smaller valve, these had 2.04/1.57 valve diameters. This is the most impressive head we have seen on a 3.90 bore. The chamber measures around 3.950" across, so it is designed to be optimum on a 3.90 bore. All flow numbers off our bench.
Lift............AFR 205...........AFR 225...........TFS 215
.100............64...................68........... ........69
.200............140.................149........... ......139
.300............203.................220........... ......219
.400............250.................269........... ......261
.500............282.................306........... ......304
.550............296.................315........... ......314
.600............303.................305........... ......325
With this head having this much all around flow and being designed specifically for a 3.90 bore we anticipate it should be the most powerful 3.90 bore head money can buy, and it has TONS of piston to valve clearance. It has about .050" more P to V then our 5.3 Stg 1.5 head. I have flow numbers off the new Dart heads, but they were not as good as the AFR 205. Enjoy!
All flow numbers off our bench.Lift............AFR 205...........AFR 225...........TFS 215
.100............64...................68........... ........69
.200............140.................149........... ......139
.300............203.................220........... ......219
.400............250.................269........... ......261
.500............282.................306........... ......304
.550............296.................315........... ......314
.600............303.................305........... ......325
With this head having this much all around flow and being designed specifically for a 3.90 bore we anticipate it should be the most powerful 3.90 bore head money can buy, and it has TONS of piston to valve clearance. It has about .050" more P to V then our 5.3 Stg 1.5 head. I have flow numbers off the new Dart heads, but they were not as good as the AFR 205. Enjoy!
when can we order a set?
