340 cam for 318

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There was a time when Crane was selling select single pattern cams marketed as the “Energizer” line.
The SBM 272/272, 216/216, .454/.454, 110lsa cam(grind number 272H10) was part number 15005.

There was a time(a while back) when the Summit cams were supposedly being ground by Crane.
I believe this was when Crane owned Camshaft Machine Co.

I’m pretty sure that the current summit 272 cam is the same as that old Crane grind.

Imo, this is as big of a cam(duration) as I would put in an 8:1 318, mild cruiser type build.
I’d actually prefer something more like an Isky 262 supercam, I just couldn’t bring myself to spend $350 for an off the self HFT cam for a mild 318.
 
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If one were looking for a little bit of “lump” in the idle, the Hughes 318 Whiplash cam would be worth consideration.
 
PRH said:
I think the .454/.454, 216/216-110 summit house cam is under $200.
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Real close to the Howard mc710931-12 455/455, 215/215-108 1500- 5200 rpm range, my choice.
The summit would work great for what the op is looking for
 
Baggs said:
In my first thread, I’ve decided to just square the deck and get it to 9.58 height.

This 318 will be 8:1 SCR
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If you're taking the engine apart anyway, then why is it staying at 8.0, which is the 318's Achilles heel? and then start talking about 340 cams? which were designed for a high-compression engine?
Just put some decent compression pistons in it right from the get-go. You won't be sorry.
 
AJ/FormS said:
If you're taking the engine apart anyway, then why is it staying at 8.0, which is the 318's Achilles heel? and then start talking about 340 cams? which were designed for a high-compression engine?
Just put some decent compression pistons in it right from the get-go. You won't be sorry.
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this was covered in his other thread....
 
I bet factory replacement 9.2:1 pistons are not terribly expensive.
 
rumblefish360 said:
@Baggs - What is the rear ends gear ratio and tire size? The cams mentioned below work well with 2.94 to 3.55 gear ratio pretty good.

The weird thing with Chrysler is for a long time there is a gap between the 3.55 to 3.91 ratios. The 3.73 went missing in the early days. It’s available though.

If your gear ratio is at 3.23/3.21 or numerically lower, I would not use a larger cam and the stock converter. Read on below.

The Crane is a 272 (216@050) .454 on a 112.
This cam has a mello idle, easy driver, a basic upgrade cam that works well in a stock engine with or without bolt on’s. Exhaust manifolds or headers, 2 or 4bbl carbs.

I used the split cam at 216/228 (272/284) .454/.480 on a 112 in that old project Duster I started in with a decade plus ago to try and show how just simple bolt on parts can really improve a low compression 318. The Duster did end up managing some high 14 1/4 runs on a ‘79, low 7.8-1 compression long block 318 & 3.23 gears on stock tires.
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Currently 4.11. 727 transmission. No power brakes, only vacuum I think, will be for the distributor.
Here’s a screen capture of the one I was looking at.

IMG_8026.png
 
I might add, I’ll do some port work on the heads, I won’t be having larger intake valves installed though, and won’t be going radical with the die grinder.
 
Baggs said:
@junkyardhero likes the cam for the 8:1 318.
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that was the best of the ones you posted.

personally, i'd look elsewhere before buying anything from comp (except maybe springs/retainers or maybe a timing chain).

you mentioned 4.11's what tire are you running out back?

also, i don't know if it's been asked and answered yet: what's your desired outcome? what kind of driving are you doing? what are your expectations?
 
junkyardhero said:
that was the best of the ones you posted.

personally, i'd look elsewhere before buying anything from comp (except maybe springs/retainers or maybe a timing chain).

you mentioned 4.11's what tire are you running out back?

also, i don't know if it's been asked and answered yet: what's your desired outcome? what kind of driving are you doing? what are your expectations?
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Tires will be 15 inch, probably in the 205-15 range, maybe 215. So not tall. 60 series if available.
Good drivability, I don’t need/want a rumpity cam.
No strip time will be seen. Possibly some spirited driving, but not along side of someone.

230/240 HP is the most I’d want in this truck.

I may change the rear end though, but will start with what I have.
 
Re:Comp. Yeah, heard the same thing about them the past several years.
More so was looking at at the grind.
 
Garrett Ellison said:
Your best bet for your engine, just make sure you have enough room for the valve lift.
Howards Cams, Hydraulic Flat Tappet Camshaft, Chrysler SB 273-360/318, 208/214 @ .050, .479/.494, 110 LS - Competition Products
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i personally think that's a buncha lift for a low comp 318 with stock small valve heads and a restrictive intake (he's gonna run a street master and something like a 500cfm carb). the duration is good, the 110 is good but the combo isn't there to take advantage of all that lift.

if i was rolling howards i'd be keen on the street force uno

www.summitracing.com

DODGE Howards Cams 710011-12 Howards Cams Street Force 1 Hydraulic Flat Tappet Camshafts | Summit Racing

Free Shipping - Howards Cams Street Force 1 Hydraulic Flat Tappet Camshafts with qualifying orders of $109. Shop Camshafts at Summit Racing.
www.summitracing.com www.summitracing.com
 
I’ll mention I’ll be riding the lifters, unused, but new 25 years back. I’d trust them more than a new set of lifters.

I’ve never heard a bad word about Howard cams either.
 
Baggs said:
Tires will be 15 inch, probably in the 205-15 range, maybe 215. So not tall. 60 series if available.
Good drivability, I don’t need/want a rumpity cam.
No strip time will be seen. Possibly some spirited driving, but not along side of someone.

230/240 HP is the most I’d want in this truck.

I may change the rear end though, but will start with what I have.
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mannnn... 4.11's with short tires... so lots of street driving for you then!

for that HP goal (let's just say ~300), and what other components you've got-- the street master, 500cfm carb. honestly, a 360 2bbl cam would get you there. that howards street force 1 would too. something like those.

for this specific application, with the parts you've got i'd be looking at sub .450 lift, and something under 260~265 duration, no more than 112 and split pattern (a grind that's got slightly more lift/duration on the exhaust).

here's the biggest issue. the gearing is gonna spin the motor up with the quickness so with the relatively small carb, intake, heads you're gonna run out of huff. keeping the cam small will make the best of the motor combo, and it'll have great street manners but because of that gearing the power delivery is going to be very quick and seem very narrow.

switch the gears for something more friendly and it changes the entire picture.
 
junkyardhero said:
mannnn... 4.11's with short tires... so lots of street driving for you then!

for that HP goal (let's just say ~300), and what other components you've got-- the street master, 500cfm carb. honestly, a 360 2bbl cam would get you there. that howards street force 1 would too. something like those.

for this specific application, with the parts you've got i'd be looking at sub .450 lift, and something under 260~265 duration, no more than 112 and split pattern (a grind that's got slightly more lift/duration on the exhaust).

here's the biggest issue. the gearing is gonna spin the motor up with the quickness so with the relatively small carb, intake, heads you're gonna run out of huff. keeping the cam small will make the best of the motor combo, and it'll have great street manners but because of that gearing the power delivery is going to be very quick and seem very narrow.

switch the gears for something more friendly and it changes the entire picture.
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Yes on the gears. For width of the axle I need, will be an early 90’s or so ranger axle.
I’ll need new axle made to keep it 5 on 5.5 BP, and have the drums drilled to match.

Not a lot of options, if any for a ‘32 Plymouth rear end;).
Used it to put steel wheels on it for a roller, and not deal with the wood spoked wheels.
 
Oh, my nephew has a ‘89 Ranger, I pulled his wheel and drum off, axle hub was maybe 6.125, won’t leave a lot of meat on the edges of the hub to open them to 5.5 BP.
 
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