I can't see where your personal hobbies have anything to do with this
340 or 360?
- Thread starter gagembassett
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3forty
"Raw Power"
See post #50. His dream engine is a blueprinted '71 340 with a '68 manual cam.I can't see where your personal hobbies have anything to do with this
I wish I would have started a list years ago of the guys who have said “I don’t want to push my 340 to hard because it’s the original block”. So they stick with running 14’s or maybe stick a set of headers, intake, and carb change and run low 13’s. No wonder the GM guys make jokes about us. Lol
And don’t forget a 360 car will never be as valuable as a 340 car with numbers matching engine or not. Kim
You are talking to the wrong guy there. I couldn’t give a damn about value. Cars, guns, or whatever I buy them to beat on and use.
This is kinda funny from the stand point of the 340 purists beating the drum of how a 340 can rev..........
Jeff Seighman
aka jeffnmo
I have a numbers 70' 340 Dart, motor, trans and rear, but I've changed so much it's not original anymore, also it came with a lot of original parts missing. I've beat the snot out of it since I got it and will continue till I die and it goes to my son, running or not.
Rat Bastid
Dunamis Metron
Professor Fate
Push the button, Max...
Not really. You just posted the vaguest question imaginable and left people guessing as to what you meant.
hotrod swinger
Well-Known Member
meh, it’s been done before. Try searching the site
Professor Fate
Push the button, Max...
Slant six or Hemi and why
justinp61
Well-Known Member
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Exactly! I’ve never been one of the lug nut polishers that sat around at car shows talking about fender tag codes or dished someone else’s car because it didn’t have date coded plug wires.
They were built to be beat on and I’ve always tried to do my part.
408 .......stroker made up from a 360.
Why, because I have one from BluePrint Engines, and it is a real screamer. If I had the chance to buy another, I wouldn't hesitate.
The previous 360 I had was so gutless, it couldn't pull the skin off a rice pudding.
Why, because I have one from BluePrint Engines, and it is a real screamer. If I had the chance to buy another, I wouldn't hesitate.
The previous 360 I had was so gutless, it couldn't pull the skin off a rice pudding.
leblanc
member 2883
This discussion could never end but budget wise the 360 would be the winner.
I don’t think the machine shop did the labour for free? Do u? Kim
Absolutely not. But that doesn't seem like a lot of money to you? I'm comparing that to a 408 that was for sale locally for $2500. Same deal: fresh build, never run. It sat on Craigslist for at least a month.
U can ask whatever u want. Doesn’t mean u will get it. The price is a little high. U can buy a BluePrint 408 for that. So u have a choice to buy it or not. The 408 on Craigs List was a steel for whomever bought it. Kim
A 360 is just a stroked 340 with larger main bearings, but a 360 can be bought for a whole lot less money than a 340.
Comparing stock stroke to stock stroke, at one hp per cubic inch, the 360's twenty extra cubes will be worth 20 extra horsepower at the same compression ratio. Back in the seventies, eighties and into the nineties, there weren't any good, inexpensive zero deck pistons for a 360, which hurt 360's compared to 340's, but that's no longer a problem.
The 340's smaller main bearings might cause a bit less friction loss than the larger ones in a 360. But I would think a 4-inch stroker crank might be more rigid with the larger 360 mains than with 340 mains.
At any rate, they are pretty close to being the same motor. I am running one 340, plus have an standard bore spare 340 block. Also running one 360, with one spare 360 block. My 340 and 360 are equipped pretty much identically - cam, intake, heads and exhaust - except the 340 has maybe 1/2 to 3/4 point higher CR. I can't really tell any difference between the two in the seat of the pants, although that's complicated a bit by the 340 being a 4-speed and the 360 being an automatic.
For a concourse restoration of a factory 340 car, you kinda need a 340, although once in the car the two motors can hardly be told apart, especially if the 360 is internally balanced. For a modified motor, it makes more sense to start with a 360 just because it's so much cheaper than a 340, and originality doesn't matter anyway.
Just my two cents.
Comparing stock stroke to stock stroke, at one hp per cubic inch, the 360's twenty extra cubes will be worth 20 extra horsepower at the same compression ratio. Back in the seventies, eighties and into the nineties, there weren't any good, inexpensive zero deck pistons for a 360, which hurt 360's compared to 340's, but that's no longer a problem.
The 340's smaller main bearings might cause a bit less friction loss than the larger ones in a 360. But I would think a 4-inch stroker crank might be more rigid with the larger 360 mains than with 340 mains.
At any rate, they are pretty close to being the same motor. I am running one 340, plus have an standard bore spare 340 block. Also running one 360, with one spare 360 block. My 340 and 360 are equipped pretty much identically - cam, intake, heads and exhaust - except the 340 has maybe 1/2 to 3/4 point higher CR. I can't really tell any difference between the two in the seat of the pants, although that's complicated a bit by the 340 being a 4-speed and the 360 being an automatic.
For a concourse restoration of a factory 340 car, you kinda need a 340, although once in the car the two motors can hardly be told apart, especially if the 360 is internally balanced. For a modified motor, it makes more sense to start with a 360 just because it's so much cheaper than a 340, and originality doesn't matter anyway.
Just my two cents.
Rat Bastid
Dunamis Metron
You won’t get the same HP/CID for that 20 inches because of the smaller bore. And the little extra RPM reduces that number even more.
If you have a 340 and a 360 and both make 1 HP/CID the 340 will still be quicker IF you use the available rpm. RPM is horsepower.
ir3333
Well-Known Member
And on the seventh day God created the 340.
I cannot agree more.
Why? 350s came with steel cranks too.
You can get a Blueprint 408 stroker cheaper with a 3 year, 50K mile warranty. Carburetor to oil pan.
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