360 heads on 318

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iran

iran

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iran tehran
i searched about it and i had found that it will decrease the compression ratio but it will incease the intake and exhaust flow , but every body says something , some people say it will make the engine weaker and some say that it has good effect ,
what is your opinion about it ? because i have a set of 360 heads and i wanna know to swap the head on my 318 or not
 
you're going to get the same thing here - lots of differing opinions - some will be based on facts, some will be based on experience, some will be pure opinion... may I suggest you go for it and tell us what YOU think when all is said and done..? a decent machine shop/engine builder will be able to help you make it all come together :thumbsup:
 
ScampMike said:
you're going to get the same thing here - lots of differing opinions - some will be based on facts, some will be based on experience, some will be pure opinion... may I suggest you go for it and tell us what YOU think when all is said and done..? a decent machine shop/engine builder will be able to help you make it all come together :thumbsup:
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i think thousands of people did it before and as my engine is stock so i think answering to this question will be easier , because maybe if it was modified answering to this question would be harder .
 
Usually cylinder head flow is more important than compression. However, IMO, 360 heads on an already low compression 318 make it dismal. It will be down in the 7s for compression.

With the mild build you are talking about, I would want the extra compression the 318 heads offer, because you will not be coming close to flowing what they are capable of, much less the 360 heads.

Again, just my opinion of course.
 
So much depends on your combo. 360 on a 318 with 2 barrel or 4? Exhaust? Headers? Camshaft? Stock trans? Stall Converter? Gears?

Not trying to be difficult, but the combo makes a difference. 360 with 2 barrel or cast iron 4 barrel, through exhaust manifold and stock exhaust, will not be worth it.
360 with performance intake, headers, duals, etc will let it breath better, but the gains from air flow, will likely be offset by compression loss.
 
I have done it. But I decked the block and stuck the piston out of the hole .040 and ran the 284/.484 cam. Took a lot of BB money with that car. It also had a B&M Super Holeshot converter, RMVB and Hooker 1.75 headers. Drove it on the street even though everyone said it couldn't be done. Hell, it was a nice driver, till the car owner got screwed by a local trans shop.
 
Backtobasics said:
So much depends on your combo. 360 on a 318 with 2 barrel or 4? Exhaust? Headers? Camshaft? Stock trans? Stall Converter? Gears?

Not trying to be difficult, but the combo makes a difference. 360 with 2 barrel or cast iron 4 barrel, through exhaust manifold and stock exhaust, will not be worth it.
360 with performance intake, headers, duals, etc will let it breath better, but the gains from air flow, will likely be offset by compression loss.
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Exactely.........my buddy runs a "smog" bottomend 318 with a set of 360 heads shaved I believe 90 thousands, aluminum intake, 625 carb,.477 lift cam,headers and it has run a best of 13.75 not bad for what it is..
 
Depends what you want.
With stock CR and a 270 ish cam the stock 318 heads will get you about 300 hp. So if you want more you could go more cam but you don't have the CR to support that or more head flow the best way would be by porting but not everyone is confident not doing that or by swapping on better heads.
Ported 318 heads is a win tie situation, gain cfm break even on cr. 360 is a win lose situation gain hp on cfm and lose hp on cr.
The best swap would be magnum head win win gain both cr and cfm.

Saying that before I knew about the CR situation I've and people I know have done the 360 head swap and have made power.
 
If I was gonna do the swap I'd do the 360 heads with 2.02 flat valves which will lower chamber volume with pocket work and a .020" off the head.
 
I think all that is a waste of money at his power level. He will be happier and less broke if he keeps the 318 heads and goes for simple bolt ons, IMO.
 
Sell the 360 heads and buy a set of 302 casting. You'll get 69CC chambers and the larger exhaust port!!

treblig
 
Treblig said:
Sell the 360 heads and buy a set of 302 casting. You'll get 69CC chambers and the larger exhaust port!!

treblig
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in iran last models are 1979 because in 1979 islamic revolution replaced kingdom , so no 302 or 308 heads!
 
Wow, I didn't see where you are located.

Must be impossible to get stuff there. Use what you have and what you can get. That certainly changes how I would do it were I in your shoes.
 
yellow rose said:
Wow, I didn't see where you are located.

Must be impossible to get stuff there. Use what you have and what you can get. That certainly changes how I would do it were I in your shoes.
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i can import parts illegally and buy paying to smugglers but it cost me about 4 times more than it costs to you , they should bring it with speed boats from UAE ! it's a complete story it self , because i should have someone in Dubai and then ship parts to Dubai and then they must send it to Iran , those mother fuckers wont let you import these parts easily and legally
 
but still there are people in iran that have more than 20-30 cars and do decent restoration jobs on them , with all these problems that we have , i have a friend who it's about 12 years that he is restoring his 1962 chrysler imperial , and it's not finished yet .
 
Do the math to determine the compression ratio, then either pick a cam that works with that CR, or mill the heads and/or deck to get the CR up, and then pick a cam. If that's not an option for you, a thinner head gasket will raise the CR negligibly, but probably not enough. Just bolting them on to a stock 318 will probably hurt more than it will help; you will gain flow, but lose velocity, so it will pretty much cancel each other out, and probably cost on the low end..
 
I did it. 13.7 in the 1/4 mile was my best. This was with lots of bolt on's and a 464 lift cam. It was a little weak in the low rpm's, but that was easily overcame with the 4-speed.
 
Did you guys catch where he lives?


Seems that he may not have many options that we do.


That's why I said do what you can. He's in a tight spot for sure, if nothing else from a logistic and monetary standpoint.
 
Geeze jpar, where the hell you been?


Last I heard you was in the woods fighting bears or some **** like that. Thought maybe you got ate by one.
 
I did it several times, 360 head 1.88 intake valve. 270/470 hydraulic flat tappet. LD4B intake. 600cfm carb. It really wakes up the old 318....
 
I've put 360 heads on stock piston 318's. I usually cut the heads .040, and nope, I've never cut the intake. No problems whatsoever. Yes, they work, but as stated above, if not going to put at least a 4bbl on it, it's kind of pointless.
 
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