Heads for 250 Blower ?

November 17, 2021, 10:59 AM

70 Mach 1

New best this past weekend on the 33 pulley with some killer air. Went 4.89@142.95 and was off .03 in 60ft. It got on the bars a little too hard and rattled the tires on the leave. Would like to have made another hit without rattling the tires but they had a tree malfunction so we headed home.

November 17, 2021, 04:15 PM

Blake4128

Brodix -3xtra 335’s ported exhausts titanium valves, Brodix aluminum block, 4.500 Bore, 4.250 stroke
12-7.1 compression
Naturally Aspirated
936.2 HP
747.1 torque
4.81/143 best
8.90/170

10-20
TBS 250 blower 39/67 pulley
Standard top with black widow spacer
APD 1250 Alcohol Enforcer
4.60/151 best

Blown 1250 Carb/Buffco top
1st pull 3# Boost
6800 RPM 39 Pulley 1250 Carb
1157/957
30 degrees timing

7500 RPM
39 Pulley 1250 Carb 3# Boost
1207/957
30 Degrees Timing
MM016SB1
4.65/151
4.29 gear little bubba

37 Pulley 1250 Carb 4# Boost
1245/981
30 Degrees Timing
MM016SB1 4.538/153.13
4.29 gear little bubba
8.90/181.99
With big bubba 8.90/181.74

35 Pulley 1250 Carb 5# Boost
1289/1021
30 Degrees timing
MM016SB1
@3500’ 4.559/152.76

35 Pulley 1450 Carb 5# Boost
1302/1034
30 Degrees Timing

33 Pulley 1450 Carb 6# Boost
1.021 60’ 2.880 330’ 4.452/156.44
Big Bubbas
29 degrees timing
4.29 gear MM016SB1
Shift @1.75 7721 RPM
2017 Lbs

November 20, 2021, 09:31 PM

smokinjeff

Thanks to everyone who replied, looks like getting any head is weeks months out. Supply may be better after first of year or we can only hope.

November 22, 2021, 02:45 PM

70 Mach 1

Made it back Saturday in some good air and ran a new best at 4psi (33 pulley). Car is 2740 lbs, glide with 1.69 low, 4.30 gear, 26 degrees timing, and 32x14.5w tire. Went 1.107 60ft 3.159 330ft and 4.855@143.27.

November 22, 2021, 03:18 PM

329L

quote:
Originally posted by Blake4128:
Brodix -3xtra 335’s ported exhausts titanium valves, Brodix aluminum block, 4.500 Bore, 4.250 stroke
12-7.1 compression
Naturally Aspirated
936.2 HP
747.1 torque
4.81/143 best
8.90/170

10-20
TBS 250 blower 39/67 pulley
Standard top with black widow spacer
APD 1250 Alcohol Enforcer
4.60/151 best

Blown 1250 Carb/Buffco top
1st pull 3# Boost
6800 RPM 39 Pulley 1250 Carb
1157/957
30 degrees timing

7500 RPM
39 Pulley 1250 Carb 3# Boost
1207/957
30 Degrees Timing
MM016SB1
4.65/151
4.29 gear little bubba

37 Pulley 1250 Carb 4# Boost
1245/981
30 Degrees Timing
MM016SB1 4.538/153.13
4.29 gear little bubba
8.90/181.99
With big bubba 8.90/181.74

35 Pulley 1250 Carb 5# Boost
1289/1021
30 Degrees timing
MM016SB1
@3500’ 4.559/152.76

35 Pulley 1450 Carb 5# Boost
1302/1034
30 Degrees Timing

33 Pulley 1450 Carb 6# Boost
1.021 60’ 2.880 330’ 4.452/156.44
Big Bubbas
29 degrees timing
4.29 gear MM016SB1
Shift @1.75 7721 RPM
2017 Lbs

You need a big bubba, 4.10 gear and possibly a tighter converter, then it should run the numbers you are looking for.

December 02, 2021, 11:24 AM

Blake4128

quote:
Originally posted by Blake4128:
Brodix -3xtra 335’s ported exhausts titanium valves, Brodix aluminum block, 4.500 Bore, 4.250 stroke
12-7.1 compression
Naturally Aspirated
936.2 HP
747.1 torque
4.81/143 best
8.90/170

10-20
TBS 250 blower 39/67 pulley
Standard top with black widow spacer
APD 1250 Alcohol Enforcer
4.60/151 best

Blown 1250 Carb/Buffco top
1st pull 3# Boost
6800 RPM 39 Pulley 1250 Carb
1157/957
29 degrees timing
Big Bubba
800-1500'
4.58/151

7500 RPM
39 Pulley 1250 Carb 3# Boost
1207/957
30 Degrees Timing
MM016SB1
4.65/151
4.29 gear little bubba

37 Pulley 1250 Carb 4# Boost
1245/981
30 Degrees Timing
MM016SB1 4.538/153.13
4.29 gear little bubba
8.90/181.99
With big bubba 8.90/181.74

35 Pulley 1250 Carb 5# Boost
1289/1021
30 Degrees timing
MM016SB1
@3500’ 4.559/152.76

35 Pulley 1450 Carb 5# Boost
1302/1034
30 Degrees Timing

33 Pulley 1450 Carb 6# Boost
1.021 60’ 2.880 330’ 4.452/156.44
Big Bubbas
29 degrees timing
4.29 gear MM016SB1
Shift @1.75 7721 RPM
2017 Lbs