340 to replace 318

[72golddustermike]

Just rebuilt my 340 10to 1 pistons and a comp xe268 cam kit was originally going in my scamp but decided to sale scamp. my 69 satellite has original 318 with 24000 miles and runs good how much performance would 340 be over my original engine I know the 318 torque starts sooner than 340.I think car has 3.23 open rear

 

[monaco66coupe]

The difference will be night and day.

 

[Bb70charger500]

318 and performance shouldn't be in the same sentence
The 340 motor is a monster if built correctly they can make a 440 owner cry 318 not so much
But 318's are great reliable motor s and mpg isn't bad ether
So yes 340 way faster and in my opinion the best motor choice not so bad mpg and lots of power best of both worlds

 

[bkleenfltx]

Interesting. If I wanted to boost the 318 from the 240 to 325....what are the easiest ways to get there. Like 72 Gold.... my car has 60,064 miles. I want some pep but I'm not going to any races anytime soon.

 

[monaco66coupe]

A budget Compromise would be to Install the 340 Cam, 68-71 Heads, or (360 heads if you can't locate the 340 head). and Intake. Install a Windage tray, And the 340 stall Torque converter. (Assuming you have the 727). 67-69 318's were 9.2:1, which will help with pump gas. 3:23 ratio as well.
The 71 Roadrunner came as a 340 with 9:5, and the car drove very well.

 

[bkleenfltx]

Okay sounds good I had some of that idea. How close do those trinkets get me to 325? Those are all things I'm willing to change and I have a new 625 demon just looking for a home.

My car is just TOO original to go messing with it. SO I will look into this idea and 325 gives me a better power/weight ratio May change my mind later but the 318 with trinkets is the plan for now.

 

[monaco66coupe]

Personally, I just don' t see 325 HP out of that 318, as that is hard enough to get with a 340 (68-71 model)I always felt 275HP was conservative on the 340, but 275 would be a success with the 318, if you want to maintain reliability,and an easy driving experience, meaning no headers under the hood. No huge tires, as that does affect your final gear ratio as well. I did this on a 318 69' Dart, and it turned into a really fun quick car, without all the hassles, and my mileage was still decent.

 

[QQBlue1]

Interesting. If I wanted to boost the 318 from the 240 to 325....what are the easiest ways to get there. Like 72 Gold.... my car has 60,064 miles. I want some pep but I'm not going to any races anytime soon.

I have a 318 in a 1968 Charger and at this point I've left it in there because it is original. I did a rebuild a few years ago in which I bored it out .30 over and did a pocket port on the original heads (675's). The cam shaft has a 450 lift, 268 duration (214 at .50) and a 112 lobe separation. On top I bolted on an aluminum dual plane Edlebrock intake with a 1406 4 barrel, MSD distributor and Hedman headers through a 2 1/4 exhaust. I went to 3.55 limited slip for the gear ratio. Once it was all said and done I took it to a dyno and made 192 hp at the rear wheels and 195 lbs of torque. I managed to burn up my transmission because I did not install the shift kit correctly, which ruined all the good work on the 904 that a buddy and I did. So, I took it to a pro who installed 5 clutches instead of the four (which were fused together) and a larger sun gear. Once I had it all tuned up I took it back to the dyno and produced the same hp, but had a bump to 225 pounds of torque. Perhaps that gives you an idea of what to expect? I think I should have gone with a smaller exhaust and although that cam shaft makes for a nice smooth idle, I'm sure someone on here can give you a better idea of a better combination. Honestly, I didn't really know what I was doing beyond reading some magazine articles and having a ton of fun! The car runs great as a cruiser, but it has to be tuned perfectly to spin the tires from a standstill, and smoother pavement helps. I'm running 255 BFGs on the back. Usually, I need a little break torque to help turn'm loose. At any rate, it is a lot sportier than the 318 I had over twenty years ago in a 1969 Charger. By the way, if anyone can comment on the dyno numbers or my combination in general that would be helpful. Are they good? Average? poor? I'd be open to suggestions on how to build more torque.

 

[monaco66coupe]

Whereabouts in Kansas? The QQ1 Charger looks like one I sold back in 1992 in Omaha. No vinyl top, no AC?

 

[73JF1Bird]

I have always been a BB Mopar Guy until last year. I purchased a 73 Bird with a mildly built 340, 4 speed gearbox and 3:55 rears. I have had a ball with this Roadrunner. It's hard to believe the torque this 340 makes. :happy3:

 

[monaco66coupe]

I agree! I drive a 69' 340 GTS presently, and that engine is a lot of fun. I have another 68' 340 engine on the stand, and I like it so well I'm Installing it in a 67' GTX I'm restoring as a driver, and The 440 will stay on the shelf.

 

[QQBlue1]

Currently I'm over in Leavenworth. I bought the car from a guy I knew down in Chattanooga four years ago. His brother had for years and drove it around North Alabama. It has a Johnson Motors sticker on the back which I think is down near Birmingham AL. You are right, no AC or vinyl, but I think it spent its whole life down there. It had been flooded up past the dash by the Tennessee River and then sat for a number of years until I bought . . . sight un-seen and drove it home.

 

[monaco66coupe]

No it doesn't sound like it. It is amazing what a tortured life some of the 68's went thru. Grateful we are they still exist!

 

[rumblefish360]

Below are two guys that know nothing about 318's and there performance potential. They must be big block only guys.think what ya want. Believe your own fodder. Just stop spreading it around.

Though I do believe a better choice is a bigger engine and it is more so a better idea because of the longer heavier B body.

318 and performance shouldn't be in the same sentence
The 340 motor is a monster if built correctly they can make a 440 owner cry 318 not so much
But 318's are great reliable motor s and mpg isn't bad ether
So yes 340 way faster and in my opinion the best motor choice not so bad mpg and lots of power best of both worlds

Personally, I just don' t see 325 HP out of that 318, as that is hard enough to get with a 340 (68-71 model)I always felt 275HP was conservative on the 340, but 275 would be a success with the 318, if you want to maintain reliability,and an easy driving experience, meaning no headers under the hood. No huge tires, as that does affect your final gear ratio as well. I did this on a 318 69' Dart, and it turned into a really fun quick car, without all the hassles, and my mileage was still decent.

 

[monaco66coupe]

He, if the 318 was such a great performer, why are there no factory examples? Because they aren't. And I'm sure I've been around them probably long before you were born, or hatched. so keep your pissy attitude to yourself, as your Ignorance is showing. Maybe too much meth? If you don't like what someone is saying, keep it to yourself. Better yet, push the delete button. so the bite me saying also applies.

Below are TQ guys that know nothing about 318's and there performance potential. They must be big block only guys.think what ya want. Believe your own fodder. Just stop spreading it around.

Though I do believe a better choice is a bigger engine and it is more so a better idea because of the longer heavier B body.

 

[rumblefish360]

Love the tantrum! Please continue.

Just because the factory never made a performance version of the 318 worth talking about has absolutely zero bearing on what it can be made to do, so that point you tried to make equal zero.

I do not care how long you have been around them. Your statement only proves you have never investigated them. Pure ignorance at a fine level. Well done, very very good.

Pissy tude? Well displayed by yourself. Again, very good.
Your insults, poor and childish.

I like what you said to begin with because you showed yourself. And I'll come and say what I please over and over and over again. Please, try and stop me! I beg you. Come to New York Mr. Internet muscle man.

Just get over the fact that you are dead balls on wrong and you'll be fine.

325 HP out of a 318 can be done easy. How you can't see a simple build of a barely more than 1hp per cube is a wonder.

 

[monaco66coupe]

Frankly,
You are so full of crap your eyes are brown.

You apparently forgot you intruded on the conversation. You Insulted the Original poster.



This Isn't the FABO, where you can blow off and Insult people you don't know, without consequences. People here are more mature, and have grown past people like you. Around where I live if you show up with that toy 318 they would kick your *** and send you home like the little boy you apparently are. Toy 318's are just that. Any Idiot can pour enough money into a weak motor and get power,. it just takes money and stupidity. You apparently have both. People on this website have outgrown the need to pour money into a slug motor and go fast No matter what a person likes, you Don't Insult people you Don't know. if you Don't like a topic shut up, and be an adult. If you were past a third grade education, you would have read where we spoke of only stock engines with stock parts, nothing else. But for some reason, You managed to escape from FABO, and come to FBBO to Insult the original poster as well. Around here most like Original cars, not bastardized cars. You can put all the money you want in a 318, and around here there are any number that would chew you up, and send you back home to mommy. So, in the end you Insult people you don't know, but it is our Fault, I guess. It must come from your upbringng.


I try not to mention,

But I have nine small Block 273-340 65-69 model cars, nine 383-440 HP big block 66-69 cars, and nine more parts cars. So, I have definitely forgotten more than you will ever be able to retain. Several are 318's, but I would never be stupid enough to build them into race engines.

And I never Insult people I Don't Know, except relatives recently Introduced.

 

[rumblefish360]

Wow! That was an excellent upgrade to your last tantrum post that included insults from 3 year olds mouths. Very good! Your next step up will be to form decent paragraphs.

I'd love to comment on everything you have written except it would be a waste of time, but, I will point out a mistake or two that you have made.

1; I have in no way insulted the OE poster. 72golddustermike was given my opinion about two people that know nothing about 318's and that I would go with a bigger engine.

Simply reading what was wrote would have stop your inaccurate ramblings.

2; you suggest FABO is a lesser board of Mopar lovers due to the use of some members 318 engines beyond a stock configuration. As well as my reply you don't like. Truth hurts don't it. Don't worry, you'll get over it sooner or later. I hope sooner.

One of my fav's is the "Dog Motor" label. But it's OK to throw money at a Favtory HP engine? Hypocrite! Or just another stupid comment. Perhaps both?

No worries! I'll insult who I want when I want where ever I want without fear from you or your twisted words. I don't need to know you. I all ready know enough about you in this forum and insult you only in this forums arena. While the FABO board is nicely adult, the dispensing of wrong info should not happen.

You don't like being corrected and insulted?

Perhaps you should leave the forum and come back when your skin is thicker. Grow some skin first.

Oh, you said "Race motor," who's building a race motor?
Certainly not the OE poster. He just said he was swapping engines.
Stay on topic! Jeezzz

Your such a waste of time

 

[bkleenfltx]

Wow! That was an excellent upgrade to your last tantrum post that included insults from 3 year olds mouths. Very good! Your next step up will be to form decent paragraphs.

I'd love to comment on everything you have written except it would be a waste of time, but, I will point out a mistake or two that you have made.

1; I have in no way insulted the OE poster. 72golddustermike was given my opinion about two people that know nothing about 318's and that I would go with a bigger engine.

Simply reading what was wrote would have stop your inaccurate ramblings.

2; you suggest FABO is a lesser board of Mopar lovers due to the use of some members 318 engines beyond a stock configuration. As well as my reply you don't like. Truth hurts don't it. Don't worry, you'll get over it sooner or later. I hope sooner.

One of my fav's is the "Dog Motor" label. But it's OK to throw money at a Favtory HP engine? Hypocrite! Or just another stupid comment. Perhaps both?

No worries! I'll insult who I want when I want where ever I want without fear from you or your twisted words. I don't need to know you. I all ready know enough about you in this forum and insult you only in this forums arena. While the FABO board is nicely adult, the dispensing of wrong info should not happen.

You don't like being corrected and insulted?

Perhaps you should leave the forum and come back when your skin is thicker. Grow some skin first.

Oh, you said "Race motor," who's building a race motor?
Certainly not the OE poster. He just said he was swapping engines.
Stay on topic! Jeezzz

Your such a waste of time

LOL you guys talk like a couple of very close friends giving each other the business for fun. I hope that is the case


I'm not looking for a drag car. I'm looking for enough power that when I want to get on the interstate I CAN! I want a little power to play with but not interested in stomping hinny every time I leave the driveway.

I finally had time to do a little more research and the 318 could be built up, however cost vs results is not worth it. I'm thinking minor changes now. By comparing the two engines it seems my original engine is best left alone with the exception of dual exhaust and maybe intake change and that is all I'll do. For a good 400 hp build I'll go to the 360 and store the 318 should I ever decide to sell.

 

[rumblefish360]

OK, so, your going the 340 route correct?
IMO, wise choice.
I also like the longer stroke of the 360 for in general hot rodding purposes. The longer stroke delivers more torque sooner and near identical HP up top earlier as compared to a 340. Advantageous for a heavy car. It's a very good engine for the street.