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building hypo 318 for 93 dakota, need help!!!

  
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building hypo 318 for 93 dakota, need help!!!

 
pmcgee5150 pmcgee5150
New User | Posts: 1 | Joined: 05/10
Posted: 05/26/10
09:54 PM

Looking to build or buy 300-400HP streetable EFI 318 that will tow a trailer and not burn out at 75,00 miles. And being that im in a smog county in cali i cant just up and swap for a carb, 360, (or 4BT cummins which i would really like) without jumping through a bunch of hoops for DMV and all that. Soooo, 1: Does anyone have any advice for making a 300-400HP smog legal EFI 318 within 2-$3000 or 2: Anyone have advice or experience in going through the motions to swap motors and get approved for smog in california. PLEASE HELP! Thanks, Phil.  

ChristopherCampbell ChristopherCampbell
Moderator | Posts: 66 | Joined: 02/10
Posted: 06/11/10
11:06 PM

Horsepower is nice, but for a truck I'd focus on building torque low in the RPM range- especially since it sounds like you plan on using it to tow.
Living in smog county (like the PHR staff) does limit your choices, but doesn't kill them completely.
Here's some food for thought from a couple past PHR tech stories on 318 Mopars.
http://www.popularhotrodding.com/enginemasters/articles/mopar/0667em_mopar_318_engine/index.html
http://www.popularhotrodding.com/tech/0810phr_chrysler_318_engine/index.html  
Christopher Campbell
Technical Editor
Popular Hot Rodding Magazine

gtomustang gtomustang
Enthusiast | Posts: 456 | Joined: 06/09
Posted: 06/14/10
09:53 AM

If you want the torque to pull a trailer and not burn itself out, then forget the HP--chances are, the parts you will find, will require revving up an engine that small.  You won't have the off the line torque you want, and every time the trans shifts and the RPMs fall back to 3000RPM, you may feel like you just fell out of the torque curve and need to wait for the engine to rev back up to it again.

How good is the piston ring seal?  If this is a hgih mileage tow engine, you may find the extra power you need blowing into crankcase.  Also, watch out for new cylinder heads that raise the mechanical compression ratio, or cams that keep the valves closed long enough to raise the cranking compression ratio...either may invite pinging on long hills.

How's the rest of the truck going to handle the increased towing you're hoping for?  Will the brakes take it?  Will your transmission need a stage 1 shift kit, that prevents the stock factory setting that "slips the clutch" from burning out the clutch packs?

I'm not sure if Direct Connection's $350 stroker crank (318 to 390) will work in a 5.2 liter Magnum, but I'm going to guess, you'd be better off in the long run using that $3000 as a down payment on a bigger truck (maybe a diesel of a similiar year, they can take high miles), and then selling the truck you have to pay off the rest.  Not the answer you wanted, I know...  
Just because you can't do it...doesn't mean its impossible

gtomustang gtomustang
Enthusiast | Posts: 456 | Joined: 06/09
Posted: 06/14/10
09:53 AM

If you want the torque to pull a trailer and not burn itself out, then forget the HP--chances are, the parts you will find, will require revving up an engine that small.  You won't have the off the line torque you want, and every time the trans shifts and the RPMs fall back to 3000RPM, you may feel like you just fell out of the torque curve and need to wait for the engine to rev back up to it again.

How good is the piston ring seal?  If this is a hgih mileage tow engine, you may find the extra power you need blowing into crankcase.  Also, watch out for new cylinder heads that raise the mechanical compression ratio, or cams that keep the valves closed long enough to raise the cranking compression ratio...either may invite pinging on long hills.

How's the rest of the truck going to handle the increased towing you're hoping for?  Will the brakes take it?  Will your transmission need a stage 1 shift kit, that prevents the stock factory setting that "slips the clutch" from burning out the clutch packs?

I'm not sure if Direct Connection's $350 stroker crank (318 to 390) will work in a 5.2 liter Magnum, but I'm going to guess, you'd be better off in the long run using that $3000 as a down payment on a bigger truck (maybe a diesel of a similiar year, they can take high miles), and then selling the truck you have to pay off the rest.  Not the answer you wanted, I know...  
Just because you can't do it...doesn't mean its impossible

thoresonr thoresonr
New User | Posts: 2 | Joined: 10/10
Posted: 10/12/10
09:49 AM

hughesengines.com  they have ported intake manifolds cams etc..  id check them out..  

Budnicks Budnicks
New User | Posts: 40 | Joined: 10/10
Posted: 10/12/10
08:54 PM

I have a 99 4x4 auto w/tow package I tow a 68 RR sometimes, Some simple things you can do the Magnum engine seem to respond well to exhaust mods I installed some Edelbrock shorty bolt in headers, Y pipe & 3" Flowmaster cat back exhaust system, some Harle Sharpe 1.7 ratio rockers (you will have to put your factory 1.6 rockers back on for smog checks)& gasget match the heads & manifolds, get a Hypertech computer tuner & a strocker crank kit wouldn't hurt but it will break the budget all the products I have used have a C.A.R.B. # on them so they are Cali. compliant, the only issue I have is truck dosn't like to climb hills at 35 mph keeps up & down shifting but (just put in 2nd gear & O/D off 2200rpm)I have 32"x12" snow tires on mine I live in the Sierra foothils, I  have only 55,000 miles so fare but no issues yet. also I added a K/N cone filter and repaced the air box with a 4" aluminum tube & silicone rubber fittings & AEM 3/4" spacer under the throttle body,  Budnicks  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

Budnicks Budnicks
New User | Posts: 40 | Joined: 10/10
Posted: 10/29/10
11:23 PM

just getting spam off font page  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

Budnicks Budnicks
New User | Posts: 40 | Joined: 10/10
Posted: 11/05/10
12:34 AM

Need to buy the Big Inch Small Block Mopar book from Mancini Racing $14.95  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

3836bbl 3836bbl
Enthusiast | Posts: 407 | Joined: 11/10
Posted: 12/05/10
11:12 PM

+1  
"Fill Your Library Before Your Fill Your Garage"  3836bbl alias Budnicks