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Forum: Hot Heads Tech Talk

Forums->Hot Heads Tech Talk->392 build help

Spartacus67
392 build help


All,
I could use a little help building my 392 hemi. I have a 1958 392 Chrysler Hemi, the engine had a 671 Weiand on it but I purchased it without the blower. This is going into a street car but I still want some power with reliability.

It’s going in a 40 Willy’s steel coupe, I dont want to cut the firewall hence why I’m going naturally aspirated. I’d like to have a snappy street motor with great torque (2500-6000). I know I’ll have to put some new pistons (thinking 10:- or 10.5:1), hydraulic .505 cam. Already have msd ignition. I may get the hot heads aluminum heads but still deciding. Like to have 500-575 torque / hp where it falls. I’ll either run a single carb or 2x4s. Is this doable or am I asking too much?

Much appreciated.
  user offline
on: Thu 15 of Aug, 2019 [19:42 UTC] reads: 1100

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hemihotrod
user offline
Re: 392 build help
on: Fri 23 of Aug, 2019 [23:52 UTC] score: 0.00
Why would you have to cut the firewall to run a 671...I would think the hood but not the firewall...

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George
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Re: 392 build help
on: Sun 18 of Aug, 2019 [18:15 UTC] score: 0.00
I’m going naturally aspirated. I’d like to have a snappy street motor with great torque (2500-6000). I know I’ll have to put some new pistons (thinking 10:- or 10.5:1), hydraulic .505 cam. Already have msd ignition. I may get the hot heads aluminum heads but still deciding.

Apart from the HP question, 10:1 is a good CR for street cars, If you use alloy heads you'll need to bump it up 1 point to compensate for the better heat conductivity of the alloy. Ask Bob about the cam.

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DaveBlakeman
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Re: 392 build help
on: Sun 18 of Aug, 2019 [16:51 UTC] score: 0.00
Remember the sign in the movie Mad Max ? SPEED IS JUST A QUESTION OF MONEY -- HOW FAST DO YOU WANT TO GO?


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