It appears that we have now officially run out of ideas on how to get more horsepower out of a 318.
There are two threads that come to mind @RustyRatRod guide to hot rod bliss and @318willrun $500 318 project.
318 upgrades
- Thread starter chorty55
- Start date
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There are two threads that come to mind @RustyRatRod guide to hot rod bliss and @318willrun $500 318 project.
We haven't ran out of ideas, this thread far as I know was just made to waste peoples time.
You build a 318 pretty much like you would any 340/360 etc.. as much as some people like to make it out like you need a dump truck full of cash and a Nascar level of R&D to get any hp out of a 318 is just not true.
You build a 318 pretty much like you would any 340/360 etc.. as much as some people like to make it out like you need a dump truck full of cash and a Nascar level of R&D to get any hp out of a 318 is just not true.
uh, Yeah! We actually included You(Our resident 318 Guru) in a 318 thread for Fun! There's a Good Chance that You won't get Beat-Up in here! (unless you blow it)
300 horse is pretty easy I think. But who cares about a number unless you build it from scratch and have it dyno'd at the shop. 350 is like the next step and 400 horse isn't at all out of the ballpark.
A member here just sent me lifter spider and dogbones for a roller cam 318 block I have. I have a set of Speedmster heads, a LD4B and a 650 AVS2. Also a pair of 69 340 exhaust manifolds if I want to use them. Oh, and a 273 crank (forged of course) I think I should be able to get 350 hp or more out of that combo with the right cam and some flat tops and 9.5 compression or so.
100%, I think a lot of people would be better off building to an Rpm number than a hp number.
eg.. 2000-5500 rpm with a hp peak around 5000 rpm, with some gears and higher stall, 2500-6000 rpm with a hp peak around 5500 rpm etc..
I don't have anything I would want to put it in but, I would like to build it and dyno it just to see what it does. Just for fun.
Exactly!
P4452761 .450"/.455" lift, 268/272 duration 110LSA, mild port 302's and a 3310 750 will do 330hp just under 6K
as a data point that was with headers, and the static was 10:1
so better heads and little more cam gets you there pretty easy. i don't think the 340 manifolds would be a hindrance at that power level, although you'd pick up more power everywhere with headers-- which we already knew.
And that's with a mild cam (a bit bigger than a 340 cam but not by much) and mild heads. It makes you wonder what all the hub bub is all about with these 318 threads. I know. The guys that always go for big cubes and maximum horsepower chime in and they would never be satisfied with 300 horse.
I think 318 threads are surfacing at a rate because of choices. Pretty much 5.2/5.9 is what's readily available on the lower spectrum of things. So, if one already has a 318, they ask themselves "can this work for what I want?" And the answer is generally "yes". I continue to get private messages here and emails on my channel about 318's and the likes.And that's with a mild cam (a bit bigger than a 340 cam but not by much) and mild heads. It makes you wonder what all the hub bub is all about with these 318 threads. I know. The guys that always go for big cubes and maximum horsepower chime in and they would never be satisfied with 300 horse.
One aspect of building a 318 based motor that seems to go overlooked is many of us left the 318 behind with our youth, many in our late teens but after years of building larger small blocks and the ease of BB power and when even the longer stroke builds past the cookie cutter 4 inch stroker kits can get tiresome.
Its fun and challenging and lets not forget there are many who love the Ford 289 and Chevy 302.
Fun can come in many different forms and many of us do not drink or fish and are too old (well, heart is too bad off) for frequent hookers and cocaine. Gotta do something.
Its fun and challenging and lets not forget there are many who love the Ford 289 and Chevy 302.
Fun can come in many different forms and many of us do not drink or fish and are too old (well, heart is too bad off) for frequent hookers and cocaine. Gotta do something.
well, that explains it. i was over here thinking what in the sam hell is forp horty?!?
hahaaaa...
14.7:1 CR?
36 dB firing order?
slower starter for help cold ignition?
longer spark plugs to seat into the pistons?
altimeter?
as mentioned, i had a better one typed up, but i tripped over the power cord and lost it.
oh well. and yeah i missed april 1st.
You guys all needed a laugh. Enjoy!
I wouldn't have it if you bought it for meI found Dan's duster.
funny pictures
junkyardhero, did you give this cam as a reference? I ask because according to summit website it's not available and jegs didn't even list it.
yes it's a MP purple shaft grind that's NLA
several companies make sometime similar enough or you could get a grinder to copy it.
74RRunner
Active Member
That's awesome. Or at least would be when finished.
Now I'm wondering what it costs to ship something like that all the way across the country.
74RRunner
Active Member
67FormulaS_273HiPo_4spd
Well-Known Member
I bought a totally stock standard 1974 318 recently, that was rebuilt years ago and sat in someone's shed. The cast pistons have 4 valve reliefs and are 0.103" in the hole. I bought a set of cheap Sealed Power 526AP30 pistons which are a true flat top with no valve reliefs and 0.067" in the hole. With the mildly ported (230/160cfm) 360 J heads I have, that have been cut 0.040" we get an honest 9:1 SCR, using a Mr Gasket 0.025" head gasket. Cam is a Comp XE262H with a Performer intake and Eddie 600 carb and Doug's long tube headers. Hoping for 320HP & 360TQ. I think this is really achievable and proves that you can have tons of street driven fun with a LA318.
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