1974 4 Speed Top Speed?
CF Community Team




Joined: Apr 2016
Posts: 14,146
Likes: 7,433
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
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Has anyone actually driven one of these things flat out in stock condition? The speedo goes to 160 but I would think it won't do anywhere near that, especially without overdrive. I sometimes wonder what mine would do. I got up to about 80 once but value my driver's license too much and slowed down real quick. I estimate I have about a 3:50 rear gear by turning the rear wheel and counting drive shaft revolutions. I also have headers, and an Edelbrock carb and intake, which I guess may have added 50 H.P., or is that wishfull thinking?
Yep, its wishful thinking, you will need to get into the heads & or cam for a +50hp
CF Community Team




Joined: Apr 2016
Posts: 14,146
Likes: 7,433
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
My car has a horrible tendency to oversteer and Im still trying to figure out the alignment issues thats causing that....
So, when my 454 gets over 90 MPH (which I get to REAL quick) it gets very scary. Also, running generic sidepipes makes it sound like its going to blow up at those RPM's.
So, when my 454 gets over 90 MPH (which I get to REAL quick) it gets very scary. Also, running generic sidepipes makes it sound like its going to blow up at those RPM's.
Some time ago there was an extensive thread on C3 Aeros. The consensus was a fastback C3 w/PC aeros and a little cleaning up should do 160mph w/300 rwhp. That fit w/200mph requiring 600 rwhp.
Anything over 125 requires areos and rwhp!
JMHO
R
Anything over 125 requires areos and rwhp!
JMHO
R






