What to do?

In my 71 CJ (T-14 & D18 twin stick) I currently have a tired 1978 231 V6 that really needs to be re-built. I found someone that has a 225 V6 for sale. I am thinking it would be nice to be able to put a 225 back in my Jeep. Either engine I would assume would need rebuilding. Other than the heavier fly wheel on the 225, which if you where I would you rebuild the 1978 231 or buy and rebuild the 225.

Thanks in advance for the help!

 

No matter what its going to cost double what you plan.

But the 225 runs cooler, and the flywheel is great for crawling but not much use on DD.

Either would make a good motor after rebuild.

 

I hope my JEEP doesn't read this; I drove her to work almost every day over the summer.

 

Everybody wants to kibbitz here.

What I should have said is the 231 has a lighter flywheel and will rev up easier and is more of a DD type setup.

The whole idea of the heavy flywheel was more drivability at low speeds like crawling around in offroad type situations.

If thats what you need then obviously the 225 would be better.

If your driving a stock type DD a lighter flywheel in a 231 would give better mileage to a point.
And would rev up a little easier.

If a heavy flywheel was the bees knees then they would have used them in a lot of cars but they didnt.

This is what makes them different, but may not be that big a deal.

But everyone has a different opinion as you can seeR)

It would be nice to get a 225 back in it, just my opinion.

Just keep in mind no swap is just bolt in never happens.
$$$$ Happens.

That said its likely that rebuilding what you have now and putting it back will be cheapest... most likely...


(IMHO) I think this will be my new sig.

 

Will the flywheel from the 225 fit the 231? Or is the bolt pattern different?:hurrican:

 

kib·itz (kbts)
intr.v. kib·itzed, kib·itz·ing, kib·itz·es Informal
1. To look on and offer unwanted, usually meddlesome advice to others.
2. To chat; converse.

 

Well that sounds like a forum..........

My mistake

Lets kibitz monkeys

 

They should have a kibitzing forum.

This is when someonre replys that if I searched, I would find the kibitzing forums.




What was this thread about ...oh yea.

X2 they sound really good. very good reason to pick 225.

Some will say they sound best with dual pipes.

But others will disagree because they perform better with a single pipe so duals are out....but I digress..


Although with just exaught manifolds they sound strange.

Opinions

Trick throws a piece of wood on the fire and takes a sip of beer.........

 

Meh, I drove my '71 CJ-6 as a DD for nearly a year. Once it's spinning (ie - after the starter motor disengages) the inertia of the heavy flywheel really posess little trouble to the engine. Mine would rev freely, accellerate strongly, etc.

On the other hand, I've driven a 2.5L Jeep with a custom lightweight flywheel in a comparative test against a regular 2.5L Jeep with miserable results. Had to rev the snot out of it from a stop to prevent the engine from stalling and there was little-to-no difference in accelleration as compared with the regular Jeep.

 

Alright , my turn to kabitz, I had a "48 Willys PU with the odd fire Buick 225 I loved it I drove it 20 miles to work dailly. While it was slow, it really shown in the snow!! As has been said, rebuilding the original to your Jeep 231 wil be less cost and less hassle. I would recomenn that option. IIRC not ALL 225s were odd fire. I realy like the sound of the odd fire, but my pa said it sounded terible, oh well to each his own, I hope this helps, Matt W.

 

Regarding the heavy flywheel. I think I read here once that one reason for using it was the odd fire pattern of the 225 OF.

The heavy flywheel could smooth out the motor, maybe make the timing chain last a little longer.

This may or may not be true but it does make some sense. Or I could be just kabitzing!