1973 340, want more power.

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rumblefish360 said:
I have 4.88's in the Duster now. Put put around town and rip it up on the back street strip. Not really good for anything in between. But I do like them.
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I may...might...maybe go to 4.88's when I do the D60 for my car. I'll see what it does with the 4.56's and if I think I need a bit more..........4.88's it will be!
 
rumblefish360 said:
I have to disagree with MOPE a good bit working backwards on his list and say that the 340 has the HP advantage without a doubt. Not the torque. (IMO at least.)
2nd, pulling the 727 for a 904 is a pricey thing that includes driveshaft work.

IMHO, the following parts would be a better bet.
Open air cleaner
750 Holley/800AVS Thunder
RPM intake
RPM heads with some minor work done
(This over stock heads with a bowl porting and 2.02's.)
1-3/4 header - 2-1/2 exhaust
3.91 gears

My only two concerns are where the pistons sit in the hole and the cam to be used. These two areas as I read the read are a bit grey to me due to your goals. One feeds the other and to properly answer the question i need more clearity.

Just as an example, Edelbrock claims 417 hp with there set up which includes there cam, which I am not exactly a fan of. Add some duration for a street stripper. 10*'s ought to do it. (Hyd. cam)
To copy cat a build is not a shameful thing, but give accolades to the original builder.
Just food for thought.
Click to expand...
You mean this? Doesnt seem to pricey, might to it after the gears this year...
Would it make a noticable difference in power compared to my stock one?
rumblefish360 said:
I have to disagree with MOPE a good bit working backwards on his list and say that the 340 has the HP advantage without a doubt. Not the torque. (IMO at least.)
2nd, pulling the 727 for a 904 is a pricey thing that includes driveshaft work.

IMHO, the following parts would be a better bet.
Open air cleaner
750 Holley/800AVS Thunder
RPM intake
RPM heads with some minor work done
(This over stock heads with a bowl porting and 2.02's.)
1-3/4 header - 2-1/2 exhaust
3.91 gears

My only two concerns are where the pistons sit in the hole and the cam to be used. These two areas as I read the read are a bit grey to me due to your goals. One feeds the other and to properly answer the question i need more clearity.

Just as an example, Edelbrock claims 417 hp with there set up which includes there cam, which I am not exactly a fan of. Add some duration for a street stripper. 10*'s ought to do it. (Hyd. cam)
To copy cat a build is not a shameful thing, but give accolades to the original builder.
Jht.
Click to expand...
image.png
This doesnt see, to pricey. Would i notice a big i improvement over my stock one?
 
That one for for driving in cold weather, the air gap version here --> https://www.summitracing.com/parts/edl-7576/overview/make/dodge
If it is a fair weather car and for max power. It's worth a few HP over the standard rpm intake.

A big improvement? In a way, yes, and even more so when the engine gets more and more built up. It's not like adding a two hundred shot of NO2.
 
Richard McLaughlin said:
Did you dislike your 3.91 or did you find it a good highway/street/strip balance?
Click to expand...

Sorry i thought i had responded to this.
I HATTED Then on the freeway, you're the slow on in the slow lane. streetlight to street light and drag racing i like then a lot more.
now that it is trailered, 4:56 are a lot of fun.
If money wasn't a problem, i would keep my 4:56 and bolt a GV on the back. have the best of both worlds!
 
Cudafever said:
Sorry i thought i had responded to this.
I HATTED Then on the freeway, you're the slow on in the slow lane. streetlight to street light and drag racing i like then a lot more.
now that it is trailered, 4:56 are a lot of fun.
If money wasn't a problem, i would keep my 4:56 and bolt a GV on the back. have the best of both worlds!
Click to expand...
Would 3.73 be much better on highway?
 
rumblefish360 said:
That one for for driving in cold weather, the air gap version here --> https://www.summitracing.com/parts/edl-7576/overview/make/dodge
If it is a fair weather car and for max power. It's worth a few HP over the standard rpm intake.

A big improvement? In a way, yes, and even more so when the engine gets more and more built up. It's not like adding a two hundred shot of NO2.
Click to expand...
Ok. Keep referring back to a post where you wrote a list of upgrades that was easy to understand.
You still think 3.91 is best eh rumblefish360 ?
 
Richard McLaughlin said:
Ok. Keep referring back to a post where you wrote a list of upgrades that was easy to understand.
You still think 3.91 is best eh rumblefish360 ?
Click to expand...

Possibly
1: I'm still not sure of your direction.
2: Normally by now, the forum has answered all questions by the poster on there intended engine build and we are still here re discussing the combo over and over again. And you have asked me the same question twice.
Why?

3: What I think is best? Mat very well vari depending on the person at the other end of the key board and how there answering the same & similar question. So far, the way you answered the questions leads me "to think" that 3.91 gear set with a tall tire would work for you.

Now that we are on page 6, have you decided on what your doing?

1973 340, want more power.

1973 340, want more power.
 
rumblefish360 said:
Possibly
1: I'm still not sure of your direction.
2: Normally by now, the forum has answered all questions by the poster on there intended engine build and we are still here re discussing the combo over and over again. And you have asked me the same question twice.
Why?

3: What I think is best? Mat very well vari depending on the person at the other end of the key board and how there answering the same & similar question. So far, the way you answered the questions leads me "to think" that 3.91 gear set with a tall tire would work for you.

Now that we are on page 6, have you decided on what your doing?

1973 340, want more power.

1973 340, want more power.
Click to expand...
Sorry man haha you are right. New to the game so a little nervous and second guessing myself.
I know what your saying.
 
No worries.
So! What have we come up with?
Got a plan?
 
Ohhhhh-Kay then!
I thought it was New Brunswick New Jersey..... webby is a good guy.
 
That's why I gave you that on line gear calculator! Us it! Only you can decide if a 3.91 is the best fit, for you.
These are question that you have to ask.........and answer yourself.

how high rpm am i willing to have at freeway speed
How often do i drive or need to drive on the freeway
while this be more of a daily driver.
weekend cruiser
or drag strip Haller.

IN the end the gear ratio you choose will be a compromise. AKA the best compromise for what you want out of it.
use the calculate and ask and answer these questions.
 
Cudafever said:
That's why I gave you that on line gear calculator! Us it! Only you can decide if a 3.91 is the best fit, for you.
These are question that you have to ask.........and answer yourself.

how high rpm am i willing to have at freeway speed
How often do i drive or need to drive on the freeway
while this be more of a daily driver.
weekend cruiser
or drag strip Haller.

IN the end the gear ratio you choose will be a compromise. AKA the best compromise for what you want out of it.
use the calculate and ask and answer these questions.
Click to expand...
Sweet!
I'm Gona try and take it on the highway asap. See what rpm I can tolerate.
 
IF you have tall gears now (2:76) put it ins 2nt gear and drive down the freeway. Hold it at round 3000 rpm.
where i raced, i had to drive on the freeway about 50 miles. running at 3000 rpm and having every one pass you was a pain.
 
Cudafever said:
IF you have tall gears now (2:76) put it ins 2nt gear and drive down the freeway. Hold it at round 3000 rpm.
where i raced, i had to drive on the freeway about 50 miles. running at 3000 rpm and having every one pass you was a pain.
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Stupid question, while running at 3000rpm you could still tramp on it and pass someone correct??
 
Why sure you could...........but you don't want to stay at 4000 rpm right? what does EVERYBODY do when you pass them......They speed up! So you slow down and they pass you.
THAT IS THE FRUSTRATION! So you just drive in the slow lane, all the way there.:(
 
Mr McLaughlin
If you don't push your chair away from that computer, and get in that car............You will never be able to answer them question i gave for you to answer your self.
We can help But YOU have to make the final decision. and it cant be done in front of that computer screen!
 
Cudafever said:
Mr McLaughlin
If you don't push your chair away from that computer, and get in that car............You will never be able to answer them question i gave for you to answer your self.
We can help But YOU have to make the final decision. and it cant be done in front of that computer screen!
Click to expand...
Hahahahaha. I know i know, very close to buyng now dont worry..l
 
So you're going to buy a set of gears and then test>>> well that sure will tell if you like them...........
 
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