318 to 340

[Moparbaker]

I'm wondering about if there's any use to bore a 318 to a 340 or would the cylinder walls become to thin then?
Anyone who's done that? & how good & reliable would it be for daily use?

 

[MoparMike1974]

Not enough meat in the block.

 

[72Dart6pack]

Try it. Let us know how it goes. Keep us posted.

 

[66fs]

Not worth it anyway. It is best to have the thickest cylinder walls you can. 4.04 - 3.91 = .13. +1/8 of an inch bigger bore, .06 per side, same stroke, not much difference if you put all the good 340 stuff in a 318.

 

[Hellrats]

Try it. Let us know how it goes. Keep us posted.

LOL... Your mean

 

[72Dart6pack]

340's are so over rated

 

[Divenut]

Hey! We made it to post #6 before the 340 haters chimed in! LOL ;)

Pat

 

[72Dart6pack]

Skipped over 340 & went right to 408 Six Pack.

 

[72Dart6pack]

Bet we can drag this Bad Boy post out to 3 or 4 pages.

 

[72Dart6pack]

Hydraulic or solid cam? In this clone 340? Power will peak around 5400. So no need for a forged crank.

 

[318willrun]

Bore a 360 .040 over and put a 318 crank in it = 340

 

[273]

A 0.030 - 0.060 over bore 318 is a decent size. Unless building a 500 hp plus engine build a 318 as if it was a 340 you aint gonna notice much of a difference especially if geared and stalled properly.

 

[72Dart6pack]

Just tell people it's a 340. Problem solved.

 

[Go Mango]

340's are so over rated

My 70 swinger 4 speed car has a 340. It was rebuilt many years ago by Sam Jones of early 60's NHRA fame. I don't know what he did to it, but it's a wicked little beast with the factory 3.91 gears. Best engine I've ever owned.

 

[nm9stheham]

FWIW, I just measured a standard bored 273 block that had pretty nice walls. If it was bored .065" on all walls, it would end up at .120" minimum on any thrust face, and .115" minimum on any front or rear wall. It might work out for just driving around if you found a 318 block with such even walls. But as said, there are better ways to get to what is desired.

 

[Max1196]

No no no , put the 360 crank in the 318 and then you've got a 340nine

Bore a 360 .040 over and put a 318 crank in it = 340

 

[72Dart6pack]

Are we on page #2 yet? Lol

 

[408 swinger]

Don't forget the ported 906's and 509 cam and, oh ****! 340 not 440. My bad! Bwahahahahaha!

 

[318willrun]

No no no , put the 360 crank in the 318 and then you've got a 340nine

Didn't you read? The OP want's a 340, so it has to be my way

 

[72Dart6pack]

So should put X Heads or TA Heads on this clone 340? Just throwing the topic out there.

 

[Go Mango]

I'd imagine the OP feels like he was asking a legit question, and didn't expect to be poked fun at.

 

[abodyjoe]

Sonic test the block and see if it will go that far safely.

 

[gliderider06]

Why not just put a 4" stroke in it? More cubes than a 340. Much better than paper thin cylinder walls and lots more torque. My $0.02

 

[SWED67barracuda]

Well, at least there was a few serious answers... at 1:st I thought I'd tell you more but... nope.
I was just asking if it would be worth it, now I'm leaving you to continue with all your fun, don't 4get 2 go to the toilet sometimes...

Hi , posted a comment on this in the thread 340 just under this one

 

[Hellrats]

No bore a 360 .040 over and call it a 340 stroker!