Extra hp out of my 340.
Hi All,
I've got a 71 Dodge Demon 340. Don't know what's been done to the motor as it was rebuilt before I bought it. Seems very strong though & with maybe 10,000 miles on it. We put it on the dyno recently & it's getting 340 hp at the flywheel. I would like to get some extra hp without tearing down the motor. Has no after market mods on it besides a 670 holley street avenger. Was looking at doing the following -
1. Alloy Heads
2. Dual plane alloy intake manifold &
3. Headers (or as we call them here in Aust. extractors).
Not sure about a cam change as I don't want to sacrifice torque which it's got plenty of.
With the alloy heads I would like them to fit under the factory rocker covers. I will also paint the inlet manifold the hemi orange. Trying to keep the engine bay as original as possible.
If I do the above what hp increase would I see?
Cheers,
Glenn.
Hi All,
I've got a 71 Dodge Demon 340. Don't know what's been done to the motor as it was rebuilt before I bought it. Seems very strong though & with maybe 10,000 miles on it. We put it on the dyno recently & it's getting 340 hp at the flywheel. I would like to get some extra hp without tearing down the motor. Has no after market mods on it besides a 670 holley street avenger. Was looking at doing the following -
1. Alloy Heads
2. Dual plane alloy intake manifold &
3. Headers (or as we call them here in Aust. extractors).
Not sure about a cam change as I don't want to sacrifice torque which it's got plenty of.
With the alloy heads I would like them to fit under the factory rocker covers. I will also paint the inlet manifold the hemi orange. Trying to keep the engine bay as original as possible.
If I do the above what hp increase would I see?
Cheers,
Glenn.
