3 3/4 engine

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3 3/4 engine

Postby bluecars » Wed Feb 20, 2019 8:25 pm

just wondering has anyone out there ran a 3 3/4 around 420 weight package and if so if I may ask what ET did it run what gear were u running tks in advance
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Re: 3 3/4 engine

Postby mrhockey » Thu Feb 21, 2019 9:19 pm

We haven't but I bet it's way sub 7.90 if that's what you are going for.
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Re: 3 3/4 engine

Postby jtracr » Mon Feb 25, 2019 12:18 pm

I ran just that. Mine had a dyno 127 cam, fairly small, and we ran a 42mm and fairly small diameter pipe. At around 430 lbs and a 5.50 gear it would run 7.70 et. At 2000-3000 ft DA. We played with weight from there.
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Re: 3 3/4 engine

Postby bluecars » Mon Feb 25, 2019 9:35 pm

Tks guys
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Re: 3 3/4 engine

Postby jtracr » Tue Feb 26, 2019 11:23 pm

When my son aged out I sold a 3 3/4 to a buddy with a bigger kid. He went to a 45 carb, bigger pipe and dyno 129. He was able to run 7.90 at almost 500lb package. They ran a 6.0 gear.Just FYI.
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Re: 3 3/4 engine

Postby simoncope » Mon Mar 04, 2019 1:15 am

Any stout 3 1/2 will run 7.90 at well over 500lb. A 3 3/4 will be overkill for anything but a very heavy package.
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