can I get a 350-400hp 318?

[74 DART SWINGER]

Could I expect 350-400hp out of my 318? What im going to put in it is(top-bottom). 600 cfm holley vacumm,weiand action plus intake, 360 heads(standard valves) with good porting, new pistons, comp cams xtreme energy(477/484 lift), and a windage tray. Thats all I can think of for now.

If I had that engine with coil-overs and ladder bars,3.73 gears, 9-10" slicks, cold I be in the high 12's?

THANKS

[rumblefish360]

Sounds like your making consesions to a build up in MoPar Muscle. For everything you don't do like they did, there a trade off in performance. EX;
Smaller valves COULD mean lower HP and greater torque. as well as limiting your RPM. To many factors to list and explain in 1 shot. I'd be here all night going into facts and theroy about how the world turns.
Let me get the write up and give it some thought.
As it stands, the smaller valve could cut HP more than you might hope it not to. But it sound , sound.

[dave571]

12's are pretty fast.

I don't think that's enough gear.

You'll need a good stall converter.

A custom ground cam will yield you better results for only marginally more money.

I don't think the 600 cfm is enough either.

Using a horse power calculator you'll need over 400 at the crank to do it.(assuming 3400 lbs with you in it)

That's a lot of power. I think the combo you're suggesting is at least 100 horse shy of that.

[74 DART SWINGER]

Could I make it into the mid 13's, with a all of that plus the torque converter?

[The Dartman]

I fully agree with dave571's observations. You need more of everything to put those kinds of numbers together.

My 318 combo is a good example of a moderately built 318 motor that performs to your expectations.

My 318 is 40 over with 12.5:1 pistons, a Racer Brown .510 lift, .292 duration camshaft, unported "J" heads with 2.02's, and a 750 Mechanical Holley on a Edelbrock Victor Intake. The converter is a TCI 3800 Stall unit in a 727 with a shift kit, going back to 3.91 Gears. This car weighs 3065 without me in it, and recently pulled a 12.97@102 pass. I imagine your car weighs in at at least 3300 with the cow catcher bumbers and other "heavy" options as well.

I think my motor is more performance built than the one you describe above, and just barely performs to your expectations. This motor also requires the use of a least a partial blend of race gas to not self destruct. I estimate this motor to put out approximately 325 "real world" horsepower. In the digital world, Desktop Dyno says this is a 430 HP plus motor. The real ET numbers don't lie, though. It takes 290 (or so) HP at the wheels to go 12.90's in a 3000 pound car.

I think some time spent on porting the heads with help the little 318 run tons better, but the whole combo needs to be warmed up a little more to run the number. A 13 second 318 is quite an accomplishment in itself as well. I can count the ones I know on one hand. So guys, sound off if you have one!! (a thirteen second 318 that is!)

Dartman

[Woodchuck]

I run 13.50 all day long @ 101.5 MPH with a best of 13.47 @ 102.7mph

My Mirada runs a 318 STOCK block mild ported J heads with 202s & 160s @ 59cc's, Crane rollers,.497/.497 262 Mopar cam , Mopar Econo Headers. Torqure 340 intake Eddy 625 carb custom ram air set up. Built 904 8 3/4 with 4.56 gears on a spool. Electric fan & W/P.

The Miradas down to 3100lbs. and get this it runs 14.75 @ 91 mph in drive with a broken intake rocker arm. If you look at the pics you will notice the lack of headlights thats where the air goes in threw dual 4" mandrel bends in to a sealed housing(buils 2lbs @ 3/4 track). The car mph better with the covers over the headlights but the ET is off buy .3 and she runs REALLY rich.

The car can be seen @
http://www.npbra.ca/members%20pages/...avemetituk.htm

[ajmopar]

getting a Mirada down to 3100 lbs is quite a feat! How much is left?

[blueduster340]

There was an article in Hot Rod at the beginning of the year where they built a junkyard 318 and got 406 hp out of it. I don't remember what month the mag was. I don't think it cost them very much to build it up either.

[23T]

Originally posted by blueduster340
There was an article in Hot Rod at the beginning of the year where they built a junkyard 318 and got 406 hp out of it. I don't remember what month the mag was. I don't think it cost them very much to build it up either.

Don/ easy boy easy, down boy down LOL

[lgorton]

check the last issue of mopar muscle mag.(november '03)

they have a pretty good write up on a 357hp 318 check it out

[blueduster340]

Originally posted by 23T


Don/ easy boy easy, down boy down LOL

What was that for? I was just mentioning the article I saw.

[sbknut]

Try 12.49 @107 With a TWO barrel 3:55 gears on PUMP GAS.

And that ain't in Kansas!!!

[NZ 440R/T]

No...........MORE!!

[23T]

Originally posted by blueduster340



What was that for? I was just mentioning the article I saw.

No dig on you was'nt ment to be but that write-up has been discussed at lenght and I was joking (LOL) to calm Don before he started typing.

I have no doubt that if you have enough $$ you may pull 500+ hp on one dyno pull. but to build a engine right you need $, time and experience= HP & longivity and a dyno is just a tool nothing more nothing less unless you set around with the sheet in you wallet and whip it out at the local drive in

[dave571]

Originally posted by sbknut
Try 12.49 @107 With a TWO barrel 3:55 gears on PUMP GAS.

And that ain't in Kansas!!!

Was it in Oz then?

[Woodchuck]

There is still quite a bit to loose. Right now there is no interior. This was my old Roundie round car so its gutted. Aluminum dash and Lexan windows race seat fuel cell VERY small battery . Anything to lighten the carthat was quick last winter. The front bumper bar is gone replaced by a light brace to hold the nose cone shape. but really thats it. No tuperware yet. Big diet time this winter. plus a freshen up and some more porting. I should have more time this winter to stip the old girl more.

[cuda66273]

Answer is: NO

Cancel your subscription to those magazines your starting to believe that crap.

"You can never exceed the speed of your wallet"

What your trying to do will take a bigger wallet.

[Kevin Garceau]

Anything CAN be done, just how much money you got? Dont believe everything you read in them articles.

Case in point how much hp can you get outta a 358 cid Chevy?

My buddy pushes damn near 800 hp outta it with no power adders and a 1000cfm carb. You can buy it used for about 17,500.00 You also cant be afraid to spin it to about 8800 rpms.

Comp elim guys get tons of hp outta their stuff, but lots of them motors cost over 40k to build. How fast do ya want to go?

[cuda66273]

Example...When my 318 grenades, it'll get a 360, 1/2 the price to build with quicker ET's

Unless you got a bone to chew with someone just go get a 360.

I've chewed my bone and it's as white as a chicken bone at a Mississippi Harvest Picnic if you know what I mean.....

Hey Rush! Wait for me.