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450 horsepower 318?? #1402082 03/13/13 06:47 PM 03/13/13 06:47 PM
Joined: Jul 2012 Posts: 153 Plant city fl 7 70Dart499 OP member
70Dart499 OP member 7 Joined: Jul 2012 Posts: 153 Plant city fl	Thinking about swapping my bigblock for a SB in my Dart, and I was wondering, how hard would it be to make between 450 and 500 horsepower with a stock stroke 318? What heads, intake and cam would be best.. 1970 Dart Drag Car

Re: 450 horsepower 318?? [Re: 70Dart499] #1402083 03/13/13 06:49 PM 03/13/13 06:49 PM
Joined: Nov 2005 Posts: 15,119 85086 moparpollack Lil Herman
moparpollack Lil Herman Joined: Nov 2005 Posts: 15,119 85086	Is boost an option? 56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d

Re: 450 horsepower 318?? [Re: moparpollack] #1402084 03/13/13 07:00 PM 03/13/13 07:00 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	It'd be hard without a power adder, and the engine would be a bear to drive on the street. Look at Steve Dulcich's two different 400hp 318 articles, one with max ported 302 heads, the other with 360 heads, to see that to get to that level he used a camshaft quite big for a 318 on the street. Adding another 50hp to that would take some doing, IMHO. It'd be like falling out of bed with a 4" crank, the right heads and pistons, though. R.

Re: 450 horsepower 318?? [Re: dogdays] #1402085 03/13/13 07:30 PM 03/13/13 07:30 PM
Joined: Jul 2012 Posts: 153 Plant city fl 7 70Dart499 OP member
70Dart499 OP member 7 Joined: Jul 2012 Posts: 153 Plant city fl	Not interested in a power adder since I bracket race, but It's not a street car. I don't think I was clear, I was thinking of something with aftermarket heads, intake &pistons Last edited by 70Dart499; 03/13/13 07:34 PM. 1970 Dart Drag Car

Re: 450 horsepower 318?? [Re: 70Dart499] #1402086 03/13/13 07:31 PM 03/13/13 07:31 PM
Joined: Jan 2003 Posts: 4,395 The Pale Blue Dot Skeptic master
Skeptic master Joined: Jan 2003 Posts: 4,395 The Pale Blue Dot	Nitrous and/or a 4" crank.

Re: 450 horsepower 318?? [Re: Skeptic] #1402087 03/13/13 07:47 PM 03/13/13 07:47 PM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat master
Triple Threat master T Joined: Jan 2003 Posts: 6,266 Renton Washington	First question would be why? Secondly yes it can be done. My stroked 318 made 525+ There are more economical ways to make the power. -Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA

Re: 450 horsepower 318?? [Re: Triple Threat] #1402088 03/13/13 08:02 PM 03/13/13 08:02 PM
Joined: Jul 2012 Posts: 153 Plant city fl 7 70Dart499 OP member
70Dart499 OP member 7 Joined: Jul 2012 Posts: 153 Plant city fl	Quote: First question would be why? Secondly yes it can be done. My stroked 318 made 525+ There are more economical ways to make the power. Why, i bought my car with the BB in it and I'm not much of a big block guy, and my car is a original smallblock car so I would like to put one back in it. Not dead set on a 318, though just exploring options. 1970 Dart Drag Car

Re: 450 horsepower 318?? [Re: Triple Threat] #1402089 03/13/13 08:04 PM 03/13/13 08:04 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 master
1Fast340 master 1 Joined: Feb 2007 Posts: 2,578 sweden	a good set of ported W2 heads and dont be afraid to turn the rpm it takes. M1 W2 single plane intake and enough compression to suport a 250-255 somethingdegree at .050 lift cam might even make more than 450hp

Re: 450 horsepower 318?? [Re: 70Dart499] #1402090 03/13/13 08:11 PM 03/13/13 08:11 PM
Joined: Nov 2003 Posts: 1,969 Chandler, AZ Duner top fuel
Duner top fuel Joined: Nov 2003 Posts: 1,969 Chandler, AZ	I wouldn't limit myself to just a 318 if the only requirement is a smallblock..... but at least you didn't say you wanted to do it with a 273!

Re: 450 horsepower 318?? [Re: Duner] #1402091 03/13/13 08:22 PM 03/13/13 08:22 PM
Joined: Jul 2012 Posts: 153 Plant city fl 7 70Dart499 OP member
70Dart499 OP member 7 Joined: Jul 2012 Posts: 153 Plant city fl	Quote: I wouldn't limit myself to just a 318 if the only requirement is a smallblock..... but at least you didn't say you wanted to do it with a 273! I honestly think a 340 would be cool since that's what's the car came with, but I don't think I'll be able to find a 340 block that's not really expensive 1970 Dart Drag Car

Re: 450 horsepower 318?? [Re: 70Dart499] #1402092 03/13/13 08:35 PM 03/13/13 08:35 PM
Joined: Jan 2003 Posts: 9,876 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,876 Weddington, N.C.	you can get 450 out of a a 318 but it takes a lot of RPM to get there, ..so the peaky "327 chevy" style powerband won't 'feel' much like 450 unless you're beating the snot out of it. I built a 341" 3.55" crank 318 a few years back and it was a screamer with actually pretty decent torque, pretty easy to do a low buck 360 crank and with a 6" rod a 9:1 flat top 318" KB piston will wind up right at (or just slightly over) zero deck. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: 450 horsepower 318?? [Re: Streetwize] #1402093 03/13/13 08:38 PM 03/13/13 08:38 PM
Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,566 Downtown Roebuck Ont	I would become more of a "big block guy" Kevin

Re: 450 horsepower 318?? [Re: Streetwize] #1402094 03/13/13 09:45 PM 03/13/13 09:45 PM
Joined: Jul 2011 Posts: 959 Chicago PurpleBeeper super stock
PurpleBeeper super stock Joined: Jul 2011 Posts: 959 Chicago	Maybe think a heavily stroked 360 with the best heads you can afford, the biggest cam you can tolerate and light weight internal parts? You start out 100hp in the hole switching from big block to small block. Sounds expensive... but definiteiy can be done. 70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"

Re: 450 horsepower 318?? [Re: 70Dart499] #1402095 03/13/13 09:48 PM 03/13/13 09:48 PM
Joined: Feb 2009 Posts: 207 People's Republic of Mass. B Belvedere2 enthusiast
Belvedere2 enthusiast B Joined: Feb 2009 Posts: 207 People's Republic of Mass.	Quote: Quote: I wouldn't limit myself to just a 318 if the only requirement is a smallblock..... but at least you didn't say you wanted to do it with a 273! I honestly think a 340 would be cool since that's what's the car came with, but I don't think I'll be able to find a 340 block that's not really expensive Depends on your budget. And if you live anywhere near me. I'll be selling my 340 soon. 406hp dynoed, 9.8comp runs on pump with a small cam, with W2 heads. Bump the comp bigger cam it'll easily run those numbers. Putting in my 380 this spring so it'll go or just end up sitting. PM if interested.

Re: 450 horsepower 318?? [Re: 70Dart499] #1402096 03/13/13 09:59 PM 03/13/13 09:59 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	Quote: Quote: I wouldn't limit myself to just a 318 if the only requirement is a smallblock..... but at least you didn't say you wanted to do it with a 273! I honestly think a 340 would be cool since that's what's the car came with, but I don't think I'll be able to find a 340 block that's not really expensive where do you live? i know where you can find one

Re: 450 horsepower 318?? [Re: 70Dart499] #1402097 03/13/13 10:00 PM 03/13/13 10:00 PM
Joined: Oct 2011 Posts: 559 Idaho L LaRoy Engines mopar
LaRoy Engines mopar L Joined: Oct 2011 Posts: 559 Idaho	Quote: Thinking about swapping my bigblock for a SB in my Dart, and I was wondering, how hard would it be to make between 450 and 500 horsepower with a stock stroke 318? What heads, intake and cam would be best.. 292ci/273, Indy 360X heads ported by LaRoy, Edelbrock Super Victor 2815, big solid roller, 93 octane, 462 HP

Re: 450 horsepower 318?? [Re: 70Dart499] #1402098 03/13/13 10:08 PM 03/13/13 10:08 PM
Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida rickstershemi master
rickstershemi master Joined: Jul 2006 Posts: 9,366 Lehigh Acres, Florida	Quote: Not interested in a power adder since I bracket race, but It's not a street car. I don't think I was clear, I was thinking of something with aftermarket heads, intake &pistons Just my but if your planning a serious bracket racing effort.....a big block, glide and as much tire as you can get under the car would be the best approach and way easier to maintain....just my opinion Rickster

Re: 450 horsepower 318?? [Re: rickstershemi] #1402099 03/14/13 07:23 AM 03/14/13 07:23 AM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	My , there's no replacement for displacement, I'd stay with the BB. It's alot cheaper and easier on parts to run a big mild motor than a hyper rpm small block.Dave

Re: 450 horsepower 318?? [Re: quickd100] #1402100 03/14/13 07:40 AM 03/14/13 07:40 AM
Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts MPerry Mopahts memba'
MPerry Mopahts memba' Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts	My car was originally a 318. I was going to try that 400 hp buildup that was in the magazine. The machine shops around here didn't feel comfortable in putting the big valves in 302 heads. I got frustrated and swapped a 413 big block in after a crappy day of bracket racing. It knocked 3 seconds off my et.

Re: 450 horsepower 318?? [Re: LaRoy Engines] #1402101 03/14/13 08:18 AM 03/14/13 08:18 AM
Joined: Jan 2005 Posts: 4,862 the frozen wastes... Pale_Roader Swears too much
Pale_Roader Swears too much Joined: Jan 2005 Posts: 4,862 the frozen wastes...	Quote: Quote: Thinking about swapping my bigblock for a SB in my Dart, and I was wondering, how hard would it be to make between 450 and 500 horsepower with a stock stroke 318? What heads, intake and cam would be best.. 292ci/273, Indy 360X heads ported by LaRoy, Edelbrock Super Victor 2815, big solid roller, 93 octane, 462 HP Hah! Why...??? I mean, thats damn cool, i love screamers, but with all the stroker hype out there, why would someone build a 462HP 273...??? Personally, i'd love to see this thread grow into some good examples. I'm also thinking about a stock stroke 318 for my next engine, and it'd need over 400HP too. I was fantasizing about Magnums though... That 360 Magnum magazine build-up linked in my 360/383 thread made 455HP with Edelbrock Magnum heads and the usual stuff. That'd be about 400HP with a 318 Magnum... and there was nothing tricky about that engine and no porting in the heads yet. I think 450HP would be pretty easy with the same combo plus bigger (but not stupid) cam, and some simple head porting? Hmmm...

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