#21  
Old 06-08-2021, 10:39 PM
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firechickenman firechickenman is offline
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Location: Savannah, MO
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Originally Posted by prostreet64 View Post
Greg, what is the lift for that cam? and what is your race weight? Thanks.
Lobes are .398" and .404" which work out to right at .650" net lift with my HS 1.65 rockers. Race weight is 3300. My previous cam was the 254/260 lobes on a 112 LSA. It was just a little too tame for me. I did pick up a couple tenths in the 1/4 when I switched to my 266/272.
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__________________
'68 Firebird

463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14

Hot Rod Drag Week finishing averages:
2014 - 11.12 @ 118.56
2015 - 10.84 @ 124.97
2016 - 10.56 @ 127.88
2017 - 10.29 @ 130.74
2018 - 10.29 @ 130.53
2019 - 10.16 @ 132.34
2021 - 10.09 @ 132.69
2022 - 10.13 @ 133.07

9.93 run - https://youtu.be/hII0_UlYM4U

  #22  
Old 06-09-2021, 12:00 AM
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slowbird slowbird is offline
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Location: Montgomery, IL
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Quote:
Originally Posted by firechickenman View Post
Lobes are .398" and .404" which work out to right at .650" net lift with my HS 1.65 rockers. Race weight is 3300. My previous cam was the 254/260 lobes on a 112 LSA. It was just a little too tame for me. I did pick up a couple tenths in the 1/4 when I switched to my 266/272.
A couple tenths between the two? That's a good gain, do you remember the mph difference? Any other changes at the time?

  #23  
Old 06-09-2021, 08:18 AM
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firechickenman firechickenman is offline
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Originally Posted by slowbird View Post
A couple tenths between the two? That's a good gain, do you remember the mph difference? Any other changes at the time?
That was the only change I can remember. I was a little surprised at the gain myself. I did the cam swap between the 2016 and 2017 seasons. You can see the ET and MPH difference in my Drag Week averages in my sig.

__________________
'68 Firebird

463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14

Hot Rod Drag Week finishing averages:
2014 - 11.12 @ 118.56
2015 - 10.84 @ 124.97
2016 - 10.56 @ 127.88
2017 - 10.29 @ 130.74
2018 - 10.29 @ 130.53
2019 - 10.16 @ 132.34
2021 - 10.09 @ 132.69
2022 - 10.13 @ 133.07

9.93 run - https://youtu.be/hII0_UlYM4U

  #24  
Old 06-10-2021, 04:32 PM
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AG AG is offline
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Quote:
Originally Posted by firechickenman View Post
That was the only change I can remember. I was a little surprised at the gain myself. I did the cam swap between the 2016 and 2017 seasons. You can see the ET and MPH difference in my Drag Week averages in my sig.
Do you use a Victor intake?

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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #25  
Old 06-10-2021, 10:50 PM
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firechickenman firechickenman is offline
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Location: Savannah, MO
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Originally Posted by AG View Post
Do you use a Victor intake?
I run a 4150 Northwind. At the time I did the cam swap, I was running a 950 cfm 4150 carb on a 2" spacer. I've since switched to a 1050 Dominator on a 2" spacer/adapter.

__________________
'68 Firebird

463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14

Hot Rod Drag Week finishing averages:
2014 - 11.12 @ 118.56
2015 - 10.84 @ 124.97
2016 - 10.56 @ 127.88
2017 - 10.29 @ 130.74
2018 - 10.29 @ 130.53
2019 - 10.16 @ 132.34
2021 - 10.09 @ 132.69
2022 - 10.13 @ 133.07

9.93 run - https://youtu.be/hII0_UlYM4U

  #26  
Old 06-13-2021, 07:13 PM
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blueghoast blueghoast is offline
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Posts: 2,396
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Quote:
Originally Posted by firechickenman View Post
Yes, very happy with it for my combo which is very close to prostreet64's combo he's building. Comp XE Street Roller lobes - 266/272 duration on a 110 LSA installed at 106 ICL. Idles at about 900 in gear, runs best when shifted at 6500 and crosses the line at 6500-6600 with my 3.73's and a 275/60R15 at 133-135 mph.
Greg What converter are you running now. Thanks

GT

  #27  
Old 06-13-2021, 09:53 PM
firechickenman's Avatar
firechickenman firechickenman is offline
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Location: Savannah, MO
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Quote:
Originally Posted by blueghoast View Post
Greg What converter are you running now. Thanks

GT
I'm still running my 10" PTC that I've had in since the start of the 2016 season. Flashes to 5000 and works really well on the street.

__________________
'68 Firebird

463/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radials/1.37 60'/6.30@108.80/9.93@135.14

Hot Rod Drag Week finishing averages:
2014 - 11.12 @ 118.56
2015 - 10.84 @ 124.97
2016 - 10.56 @ 127.88
2017 - 10.29 @ 130.74
2018 - 10.29 @ 130.53
2019 - 10.16 @ 132.34
2021 - 10.09 @ 132.69
2022 - 10.13 @ 133.07

9.93 run - https://youtu.be/hII0_UlYM4U

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