I was responding to the photo of the Pick Up. Yes, the early pistons are the way to go as well.
What vehicles had a HIPO 318?
- Thread starter MonkeyTrev
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That truck is a 1976.
Here is the truck I have now, 1989 D100 318 roller engine, with a 4 barrel, and mopar HEI ignition conversion with the E-Core ignition coil. Runs out nice.
Like the Trucks...
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That is a nice looking truck.
Wasn't E58, but there was a police 318 with all those extras listed above for pretty much all of the 1980's.
Not sure the HP rating.
The 170 HP 318 was in the 1972-74 Charger and Challenger "Rallye 318" cars, the 1972-74 'Cuda 318, and the 73/74 Roadrunner 318.
IIRC the only difference from a "standard" 318 was dual exhaust.
Not sure the HP rating.
The 170 HP 318 was in the 1972-74 Charger and Challenger "Rallye 318" cars, the 1972-74 'Cuda 318, and the 73/74 Roadrunner 318.
IIRC the only difference from a "standard" 318 was dual exhaust.
For $140, Id have that engine in my garage. The windage tray and main bolts for it are worth $100 alone. I always wanted 318 windage tray bolts, but could never find a set.
I own a 1976 D100 SWB that is confirmed to be a fleet vehicle ordered by California's transportation department. It is painted their fleet color, Hugger Orange, from the factory and received a 318HD. I was told by a former Cal Trans employee that this was a supervisors truck being a SWB.
There was no windage tray on it when I tore it down. There was a double roller timing chain, 587 heads, and a 360 4-barrel that was the same part number as the 360 police manifold. I found out that a lot of class racers used to search out those intake manifolds but by 2020 when I was digging into it I discovered that there is near zero market for those now. I went the Speedmaster heads and air-gap route with a .060+ bore, SIR rods, Comp Magnum rockers, hypereutectic pistons, and a 224 @.050 intake (forgot the exhaust).
There was no windage tray on it when I tore it down. There was a double roller timing chain, 587 heads, and a 360 4-barrel that was the same part number as the 360 police manifold. I found out that a lot of class racers used to search out those intake manifolds but by 2020 when I was digging into it I discovered that there is near zero market for those now. I went the Speedmaster heads and air-gap route with a .060+ bore, SIR rods, Comp Magnum rockers, hypereutectic pistons, and a 224 @.050 intake (forgot the exhaust).
I've never heard of a 318 Duster or Dart with dual exhaust
340sFastback
Well-Known Member
My father in law had an '85 or so brand new Diplomat with a 318 4 barrel. He was in charge or ordering all the police cars so he got a new unmarked one to drive for himself every year. Shortly after he got it he sent the car to the cop car mechanics and told them make that 4 barrel kick in better. He said they got it to kick in pretty good.
middleagecrisis
Well-Known Member
The windage tray and factory studs cost more than the $140 for the entire engine. I've only found one place that sells new factory style windage tray studs (probably made in China) and the price is outrageous. I haven't been able to find used studs anywhere, including here. I'd buy the engine and get better pistons for it, as it probably needs to be bored anyways. If it's a factory roller block, even better.
MonkeyTrev
Well-Known Member
That’s what I plan to do.
AMC Diplomat
Well-Known Member
In the 80s Chrysler let police departments order M bodies and 318s any way they wanted. It wouldn't be impossible to see every odd combination you could think of. The rules kinda went out the window for fleet sales.
Mattax
Just the facts, ma'am
318 4bbl Shows in the Dealer Data books begining in '78
CPDave
Spin Cycle
AFAIK. '80's Police cars, Shelby Pickups, Ramchargers, the '68/'69 small chamber 318s with 2Brrls pulled hard. But anybody can bolt a windage tray to any LA, so it's not indicative of anything in particular beyond how that engine was built/modified; at least with out more information like casting numbers, and how far the pistons are down the bore at TDC...
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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You want to see street HP, plug some numbers into this calculator, and watch the P/V numbers which are an indicator of low-rpm torque, to somewhere around 3000>3500rpm, which is the rpm of interest for most streeters. Unless by some crazy miracle they buy a higher than factory-stall converter, which never seems to be in the budget..... like compression...........
Everybody wants to bolt on this and that and install a big cam, and suddenly Shazzam you got what HP? well maybe you get a few hp, but at 5000rpm which with the typical 2.76s , doesn't come around until 56mph in first gear. Meanwhile the lazy sob can't even chirp the tires., cuz the bottom end is gone. That's not performance.
And notta chance do you need bigport heads/4bbl intake/and a windage-tray on a stock-cam, lo-compression, single-exhaust 318 turdmobile, with factory stalls and hiway gears; and especially not with that 114LSA/340 cam, which is gunna drop your CCP some 18%psi, Maaaaybe you can pull a few horsepower out of it at 4800rpm, if the rods keep getting oil....but the entire bottom end all the way to ~3600 is gunna be softer than my wife's bellyfat, Bin there done that, more than once, and will never do it again.
You want a hi-perf 318?
Job one is get the stinking pressure up. Way up, like 195psi/now yur talking! Course you can't get that with any stock head, and maybe not with aftermarkets, and you can't run iron heads at that pressure either, but go ahead and bolt some alloys on there, and then put the 2bbl back on with the factory cam, Shazzam yur gunna have tire frying torque, right off idle.
Second best and with iron heads would be 165psi with a tight quench.
Here's the deal, with a torqueflite, on the 1-2 shift, the Rs fall to 59%. If yur teener doesn't have torque at 59% of whatever you shifted at, your performance just came to a screeching halt. With a factory cam, peaking around 4400, you might carry that to 4800, and 59% of that is ~2800. Un-hunh. 2800.
But with the 340 cam making 115psi, what are you gunna expect with those 2.73 gears turning 56mph. Yur done, and have been done since 50mph. That ain't performance. And the hi-stall , say a 2800, isn't gunna help you one tiny bit on that rpm drop....... And rear gears, only bring this problem down to a lower roadspeed. The problem, with the 340 cam ina sub 8/1 318, is a total lack of cylinder pressure.
I would put that $140 towards pistons, no question.
But-um hey
Theses are my opinions.
And
If yur not gunna up the pressure, just get a bigger engine that already has inherently more torque. Something with a longer stroke sounds about right.
j par
Well-Known Member
When I bought my duster, the previous owner and his father worked in a wrecking yard and said they pulled the three eighteen out of a police interceptor.. it not only had a windage tray, but it had three sixty heads on it as well..
Here we go again trying to figure out ma mopar...
Here we go again trying to figure out ma mopar...
Yep. 318 4 barrel with 360 heads. There has been talk of those in the head /intake discussions about port mismatch. Mopar didn't care enough about that to cast a new manifold or redesign the heads.
Another .5 won't make much more horsepower.
stillrunners
Just a wrench short of a full tool box !
Actually - that would be a buy just for the tray and the attaching bolts.....
Right around 1974 they did make a police addition 31 8 which I feel you probably are looking at. They were put in Dodge Dart four doors. The Eugene Police department ran them for several years and they had quite a reputation for being little hot rods some police officers told me they were the fastest and quickest cars that they had up to that point and specially in that era.
Those motors may have been equipped with 587 cylnder head castings.
After over 55 years of Mopar 318s there are a Ton of HiPo 318s, they just didn't come that way from the factory!
j par
Well-Known Member
Mine were five ninety six heads and I still have them.. long ago I had them rebuilt, and I poarded them and had the machine shop port them more and put 202 valves in them K-line
guides and crowler springs, titanium retainers and ran them on my four tenth stroker.And now they have an easy retirement on my 408 stroker in my power wagon....
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