360 to 318

[Mopar-Charger]

Dumb question, but I'm pulling my 360, and putting in a 318 to sell the car.

The 318 is internally balanced, but the 360 isn't (later I will make it internally balanced).

So my question is when I put the 318 and bolt it to my 727 with the balanced converter will there be any problems?

Always had a weird vibration with the 360 from 2600 - 3000. So I'm not sure whats wrong there. Haven't had a look at the TC, but I assume it was balanced correctly.

Thanks,

Jake

 

[monaco66coupe]

different torque converters for the two. maybe the vibration was from having a convertor for the forged crank?

 

[Mopar-Charger]

I'm not sure the crank is forged?

The 318 i bought has a milled .10 crank with new high comp JE pistons and new rods, bearings, etc. The bottom end was all balanced right.

I'm thinking about just knocking the weights off and run it like that. Worst case scenario I buy a cheap converter from summit.

 

[monaco66coupe]

I believe the year of the engine will tell you. I thought I saw some cast crank 318's in the late 70's maybe? I would knock the weights off as well.

 

[440roadrunner]

The 318 uses a balancer for the cast crank. All 318s use neutral converters. You can even knock the weights off a 360 converter, carefully of course

So you want the proper 318 balancer

We are talking LA here, not Magnum. The 360 magnums are balanced differently than are LA 360s, I don't know about 318 LA / Mag

 

[Mopar-Charger]

Which ever 318 it is, everything inside is new.

It's a bored .30 block. I plan on putting it in this or next weekend. That's when I'll hit the TC problem, if there is one. I'll let you guys know.

I don't believe the 318 should have higher than 10-1 comp. If it is, what is the limit if I only have access to 93 octane?

How to lower comp? Taller gasket?



What would I face trying to start the car the first time on 93 octane if there is too much compression?

 

[monaco66coupe]

My 69 340 runs fine on 93. I don't push it around, though. I don't expect the response I got in 1979 with the car when I could get 98-100 octane, but it still runs very well. (10.5:1)

 

[Mopar-Charger]

Alright, my only thing is I plan on driving the car daily. Up until I sell the car. (to fund my other resto + 440 build.)

 

[Mopar-Charger]

Here is what the converter looks like. I pulled it out and there were no weights anywhere, except for maybe there the bolt threads are.

I always had a vibration from 2000-3000 RPMS, and had a rough idle. Is it possible that the tranny shop put an unbalanced converter in?

I was told to just pry off the weights, where would the weights be?

Thanks

 

[Cranky]

Very few teens have forged cranks but all were internally balanced. The 360 uses a different balancer than a teen and uses a weighted converter. I would think your 360 had a very noticeable vibration using a neutral balance converter on it unless you were using an aftermarket weighted flex plate and then it should have be smooth running.

 

[Mopar-Charger]

Very few teens have forged cranks but all were internally balanced. The 360 uses a different balancer than a teen and uses a weighted converter. I would think your 360 had a very noticeable vibration using a neutral balance converter on it unless you were using an aftermarket weighted flex plate and then it should have be smooth running.

No weighted flex plate. So based off the image you can determine that it's a neutral balance converter?

 

[Mopar-Charger]

View attachment 292473

Here is what the converter looks like. I pulled it out and there were no weights anywhere, except for maybe there the bolt threads are.

I always had a vibration from 2000-3000 RPMS, and had a rough idle. Is it possible that the tranny shop put an unbalanced converter in?

I was told to just pry off the weights, where would the weights be?

Thanks

Bump

I'm sorry for the being stupid. But is that ^^^ a neutral balanced converter? Also, how can you tell?

I appreciate it

 

[SublimeSixpack]

I see no balance weight on that convertor.

 

[Kern Dog]

View attachment 292473

Here is what the converter looks like. I pulled it out and there were no weights anywhere, except for maybe there the bolt threads are.

I always had a vibration from 2000-3000 RPMS, and had a rough idle. Is it possible that the tranny shop put an unbalanced converter in?

I was told to just pry off the weights, where would the weights be?

Thanks

If that converter was behind any 360, you would have had a vibration pretty much as you described. The weights are about 1/4" thick, sometimes in one piece, other times I've seen them in 2 but they are always about the same radius out as the mounting lugs for the flexplate. If this is how the trans shop put the car together I'd kick the manager in the ***.

- - - Updated - - -

Yes, that converter is neutral balance.

 

[Mopar-Charger]

If that converter was behind any 360, you would have had a vibration pretty much as you described. The weights are about 1/4" thick, sometimes in one piece, other times I've seen them in 2 but they are always about the same radius out as the mounting lugs for the flexplate. If this is how the trans shop put the car together I'd kick the manager in the ***.

- - - Updated - - -

Yes, that converter is neutral balance.

I put the 318 in without changing anything on the converter. I've never had my car drive so smooth.

After 3 years of driving the car with a bad converter. (I had the tranny +converter rebuilt by a shop, that solely does trannys.) I figured they'd know how to balance it, and never thought it to be the converter.

 

[Auggie56]

Had a neighbor years ago, who's 360 died. With none available a shop put in a 318, Yup, he had a vibration, where he had none with the 360. After talking with a local trans shop, they told me to just knock the weights off. Problem solved.