A crate 5.9l makes 400 hp @ 5400 rpms which at that rpm is displacing about 563 cfm of air a 318 would need to turn just over 6100 rpm to displace about the same amount of air aka both engines would be the same size at those rpms. So you would need a cam the would peak around 6000-6300 rpm for the 318 doesn't necessarily mean need a different cam or even if you do, doesn't mean need more duration to do so maybe different opening and closing points and or LSA could need a little more lift and or duration but I wouldn't imagine all that much. The 3 magazine 400 hp 318 do it with different cams from xe268h, xe275h, 280h so 224-231.
Today, dollar for dollar, is the 318 faster than the 340 ???
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A crate 5.9l makes 400 hp @ 5400 rpms which at that rpm is displacing about 563 cfm of air a 318 would need to turn just over 6100 rpm to displace about the same amount of air aka both engines would be the same size at those rpms. So you would need a cam the would peak around 6000-6300 rpm for the 318 doesn't necessarily mean need a different cam or even if you do, doesn't mean need more duration to do so maybe different opening and closing points and or LSA could need a little more lift and or duration but I wouldn't imagine all that much. The 3 magazine 400 hp 318 do it with different cams from xe268h, xe275h, 280h so 224-231.
Not saying it would, I have a feeling It would make 400 hp, Just keep seeing a 318 is gonna need $$$$$ to get their I'm saying if It needs a different cam thats not gonna cost anymore at worst if It needs more CR to reach it that will cost a bit but nothing crazy, not seeing where all these extra dollars are gonna come from?? Peeps are acting like your gonna need fully port W2 with 15:1 and a huge solid roller or something
So I expect this 400 HP 318 to run low 12's in the 1/4 in a 3200 pound A-body
Well
The 400hp 318 will run as good as you can set your chassis up.
If you change pistons you will have to get the bottom end rebalancedNot saying it would, I have a feeling It would make 400 hp, Just keep seeing a 318 is gonna need $$$$$ to get their I'm saying if It needs a different cam thats not gonna cost anymore at worst if It needs more CR to reach it that will cost a bit but nothing crazy, not seeing where all these extra dollars are gonna come from?? Peeps are acting like your gonna need fully port W2 with 15:1 and a huge solid roller or something
The 400hp 318 will run as good as you can set your chassis up.
420 HP with all the other variables puts a 3200 # A-Body down the 1/4 in the mid 11's @ a buck 14.
what's the HP of the Duster I posted ??? 11.9's and I think it was almost 3300 without driver. We have to be talk'n 400 hp with under .500 lift, eddy heads, 650, dual plane intake... not too shabby
j par
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Dave_J
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You all just need to stop posting as Scamp has won the day. Its his way ($$,$$$) or get your cheap skate butt the hell out.
I think a low mile junkyard 5.2 long block with some UTAwesome Beer kegger mods ($99 for the three piece kit), UTAwesome Big Mouth 1200CFM TB ($499 no core or $439 with core), a Lunati Voodoo 270/279 Retro Roller Cam ($285), a step up in Beehive springs for the 0.530 (Using 1.5:1 rockers, but a Mag is 1.6 for 0.565" lift cam) ($250), A complete 'Head gasket' change kit from RockAuto $50-$80 and a nice home done port job on the heads will get well over 330 HP for less than $2000 and that is with buying the junkyard block. No over boring or stroking and using the stock Iron exhaust manifolds and the OEM Kegger intake.
AND ITS STILL A 318CI
Lunati Cam spec's:
Retro-Fit Hydraulic Roller. Great mid range torque and power. Likes 2000 RPM stall converter and works great in towing applications with lower gearing. Advertised Duration (Int/Exh): 270/279 ;Duration @ .050 (Int/Exh): 219/227 ;Gross Valve Lift (Int/Exh): .515/.530 ;LSA/ICL: 112/106 ;RPM Range: 1800-5800
UTAwesome Magnumn parts UTAWESOME PERFORMANCE
I think a low mile junkyard 5.2 long block with some UTAwesome Beer kegger mods ($99 for the three piece kit), UTAwesome Big Mouth 1200CFM TB ($499 no core or $439 with core), a Lunati Voodoo 270/279 Retro Roller Cam ($285), a step up in Beehive springs for the 0.530 (Using 1.5:1 rockers, but a Mag is 1.6 for 0.565" lift cam) ($250), A complete 'Head gasket' change kit from RockAuto $50-$80 and a nice home done port job on the heads will get well over 330 HP for less than $2000 and that is with buying the junkyard block. No over boring or stroking and using the stock Iron exhaust manifolds and the OEM Kegger intake.
AND ITS STILL A 318CI
Lunati Cam spec's:
Retro-Fit Hydraulic Roller. Great mid range torque and power. Likes 2000 RPM stall converter and works great in towing applications with lower gearing. Advertised Duration (Int/Exh): 270/279 ;Duration @ .050 (Int/Exh): 219/227 ;Gross Valve Lift (Int/Exh): .515/.530 ;LSA/ICL: 112/106 ;RPM Range: 1800-5800
UTAwesome Magnumn parts UTAWESOME PERFORMANCE
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justinp61
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So you have built this 400HP 318 for $3000? What did it run, 1/8 or 1/4?
My 340 was .030" over, ported Edelbrocks, 11.4-1, Weiand X-Cellerator intake, Hughes 236/242 @.050", .580"ish lift IIRC hydraulic cam , 750 Quick Fuel, 727 with a 9 1/2" converter that flashed 5400, 4.30 gears. On a 275 radial it ran a bunch of 7.24 @ 94 in the 1/8 and 11.60 @ 116 in the 1/4 @ 3240#. These are real world numbers, not it should make ***, my buddy knows a guy who....... or inflated magazine builds.
I'm not saying a 318 or 5.2 can't make 400 hp or run 11's because they can, but it's not as easy as bolting on headers, intake and changing the cam. If that were the case you'd see tons of them at the drag strip on Saturday nights. Don't even mention stockers or super stockers because they are a breed all their own and you will not see guys who have $3000 budget running one any where near being competitive.
dirty white boy
50 yr old Juvenal delinquent
idk,..always got along with YR,..this dude make me wanta unload a scatter gun...lol
Sounds like you would have been better off getting a 380hp crate motor! They ran mid 11's in light a bodies. That's a fact that is well documented. Alot less cam, converter and head and roughly same performance. I still find it mind boggling that the factory give everyone the recipe but no one wants to cook it.
318willrun has documented a 318 duster in your neighborhood of et. So better refine your combo
real world #s your 340 was making around 425 or so HP.
Your car is well setup. your new combo really gets it done.
justinp61
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3200# isn't exactly light, hell a slant can be fast in a light car. My 340 would've been better off with a better flat solid cam and a 950HP but it is what it is. The numbers I posted are real world number that it ran, not hypothetical or hearsay.
BTW, the 380 crate engine wasn't a 318/5.2.
trapster
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Nitrous is cheap, 340's aren't.
Dave_J
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This is really nice to see real world. Don't take this wrong, please don't. What was the costs of this package to get 11.6@ a Buck16? Not including the body and chassis mods.
EDITED, fixed the 11.9 to 11.6.
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So you are saying that the duster 318willrun posted numerous times is all a lie? It's been documented over and over again. Here I will lay some facts out for you again! A 340 has a 22hp capability advantage over a 318. I never argued that. Point I was making is that a 380hp crate motor was well documented running into the mid to upper 11's with stock magnum heads and another smaller camshaft. So for someone to tell me how much they have tied up into their motor with a bunch high dollar parts is mind boggling to me. What did the 395hp crate motor run? I don't know haven't seen any bonified published numbers.
justinp61
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11.60? The heads were bought used
Not at all. I'm asking you if you have actually built a 400HP 5.2 and what did it run?
justinp61
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11.60? The heads were bought used and after milling and porting I had about $2500 total in them. Diamond pistons, Eagle SIR rods, balanced rotating assembly and good machine work. I'd guess 6k at the time, about 15 years ago.
The heads later went 6.57 on a 10.8-1 408 with 4.10 gears on pump 93.
Haven't got a et or mph on the 400hp 318 I built still getting other things lined out. But I can tell you that in my 3500lb dakota with 3.92 gears and 24.5-25" tires the smaller cam motor all stock internals except cam. Was smacking the 6000rpm Rev limiter right at the end of the 1/4 in the 1/8 it was running 8.80 with sever traction problems that I never addressed. This was at 4,500' elevation. People were accusing me of having a big block. So a long box peg leg dakota piss poor 1/8 times and I was still running in the 13's in the 1/4. It dynoed at 330hp. No I don't have the dyno slip that was 10years ago
Your motor runs fine just alot of different combinations out there. That's what racing is all about
Your motor runs fine just alot of different combinations out there. That's what racing is all about
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Man.... oh live !! Don't let this turn into a chest bumping contest !!! This thread simply asked a yes or no question. Do you think if you had a 3k budget to buy and build a 318 or 340 at fair market prices, which would make the most power at the end of spending 2999.99 ?? If you think 318, vote 318. Think 340, vote 340. Care to share how you'd build it?? great, put your recipe out there. No need for the "show me this"..... "No, you show me that".... LOL... Thought we all loved mopars and it's mopars we are discussing.
Dave_J
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Two things on this thread are from Sandy Utah....
One is UTAwesome and the other is a grouch that keeps call names and posting the same stuff time and again that is meaningless dribble.
I truly hope they are not the same. Sandy Utah has 83,000 people so unlikely but......
One is UTAwesome and the other is a grouch that keeps call names and posting the same stuff time and again that is meaningless dribble.
I truly hope they are not the same. Sandy Utah has 83,000 people so unlikely but......
actually I'm a Chevy guy . nothing compares to the power of a 350. lol
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