1. Sorry for the initial hiccups after launch. Everyone should be able to login now.

    Welcome to the new Pavement Sucks!

    If you are having a problem logging in, try RESETTING YOUR PASSWORD HERE

5.2L magnum HP upgrades??

Discussion in 'Dodge 4x4' started by STAR_SCREEM70, Oct 7, 2007.

  1. STAR_SCREEM70

    STAR_SCREEM70
    Expand Collapse
    New Member

    160
    0
    0
    i would like to pick up the HP and TQ in my 5.2...but not exactly sure whats able to be done, or what i should look into doing...i wanna reach like 350...its a DD so nothing crazy is needed...anyways, i have exhaust parts...header back all upgraded...i have upgraded intake...what else should i do to reach that goal...should i do roller rockers and cam? just a cam? just rockers? any help would be appreciated greatly...let me know asap...thanx
     

  2. LIL Mack

    LIL Mack
    Expand Collapse
    New Member

    870
    0
    0
    well i also have the 5.2l. i am looking at the harland sharp 7:1 roller rockers. that way it is like adding a mild cam but dont have to pull the front of the truck off. plus you get the rollers.. :bigthumb:
     

  3. bluffratram

    bluffratram
    Expand Collapse
    New Member

    150
    0
    0
    I would start with and R/T cam. that plus exhaust (with headers) and a good air intake should put you around 300HP. the problem is wverything you do to increase HP moves where it makes it further up the RPM range. My next buy would be a good set of heads, with maybe just bowl porting. The Heavy Duty aftermarket castings are nice, they flow better than the R/T heads. Thats all the stuff I am doing ot my 5.2. Have all the parts sitting inthe garage if i can ever get around to building my motor.
     
  4. LIL Mack

    LIL Mack
    Expand Collapse
    New Member

    870
    0
    0
    yeah i dont want to push the power to high up the rpm level.. i want low end grunt.. but the thing is your max torque will be much lower level than max hp. but if you increas hp you usually increase torque.. let us know what you do to your motor and how it works for you..
     
  5. STAR_SCREEM70

    STAR_SCREEM70
    Expand Collapse
    New Member

    160
    0
    0
    ive been told to look into the R/T cam...is it worth getting roller rockers with the R/T cam as well...i dont want to pull heads off and replace them but what can i do to the existing ones i own now?...exhaust is all purchased...headers back all new...intake will be upgraded to the K&N intake...i want low to midrange...any other interesting ideas to throw in there
     
  6. LIL Mack

    LIL Mack
    Expand Collapse
    New Member

    870
    0
    0
    BTW. you dont have to pull the heads to change the rockers. just take of the valve covers.. but to change the cam out comes the rockers pushrods and lifters. then have to pull the radiator to be able to get the cam out.
     
  7. chizzle1

    chizzle1
    Expand Collapse
    New Member

    2,370
    0
    0
    with everything listed in my sig I'm only putting 225 (about) to the ground.

    You'll be needing forced induction (or stroker kit) to reach 350 hp without putting the powerband so high that it's useless. IMHO.



    In addition to what's in my sig, I'd get some heads, modded kegger intake (to retain low end), mild cam, and 1.6:1 roller rockers.



    That would put you in the 300 hp neighborhood.
     
  8. LIL Mack

    LIL Mack
    Expand Collapse
    New Member

    870
    0
    0
    well even in your sig you have no internals changed, such as a cam or higher lift rockers. but the intake and headers would make the internal changes even more noticeable..
     
  9. bluffratram

    bluffratram
    Expand Collapse
    New Member

    150
    0
    0
    with just about any small block other than forced induction and stroking it, the only way to make major power gains is in the heads and cam.You can add the 1.7 rockers if you really dont want to pull the cam but it will cost about the same as pulling the cam which is worth doing, and comes with some added benefits like you get to replace your timing chain, which on any engine with more than 70k on the clock should be done anyways.
     
  10. LIL Mack

    LIL Mack
    Expand Collapse
    New Member

    870
    0
    0
    :withstupid: Well put..
     
  11. 8=D

    8=D
    Expand Collapse
    New Member

    2,372
    0
    0
    chizzle :eyecrazy:



    awake from you sleep?
     
  12. STAR_SCREEM70

    STAR_SCREEM70
    Expand Collapse
    New Member

    160
    0
    0
    yea i know that the covers just need to come off in need for changing the roller rockers...but thanx...would i be best just getting aftermarket heads and just going that way or would it be worth just kinda cleaning and mild port and polish the heads it has now? i dont want to spend a fortune on heads and intake...if you guys can point me in a direction to some good deals that would be great...im gonna look into the R/T cam(specs on that by chance anyone???)...possibly just update the rockers to roller rockers...have the throttle body cleaned and polished up...and from there not sure what else...
     
  13. chizzle1

    chizzle1
    Expand Collapse
    New Member

    2,370
    0
    0



    if you're asking where the hell I've been, I'm still there.

    Just got internet to the office over here.

    Should be back home in another 6 months or so.



    on topic: I'd agree with the statement about the cam being more effective than the 1.7 RR, BUT some may not have the inclination / know-how to tear into a cam swap. Even a shadetree can do a roller rocker swap. AND, in most cases, a cam requires reflashing the PCM to get full benefits.
     
  14. STAR_SCREEM70

    STAR_SCREEM70
    Expand Collapse
    New Member

    160
    0
    0
    i have people that can do the cam swap...but i will also have to look into the pcm flash and what not...
     
  15. southeastrt

    southeastrt
    Expand Collapse
    New Member

    32
    0
    0
    Be careful, those jokers telling you HD heads flow better than RT heads leave alot to be desired.

    Pro Topline in Austrailia originated the HD heads back in 2002. I actually spoke to them about the heads at SEMA to learn they had upgrade thicker deck surfaces and slightly improved nickel content compared to stock 5.2 and 5.9 heads. I still have their old catalog sitting here on the table.

    although flow rates were said to be improved, they were still comparable to factory Magnum heads and not considered a true performance head by any standard. The only plus would be the better metal content as an asset to help against constant head cracking with the stock magnum heads. They wanted my $10,000 Buy-In to be a direct distributer badly but i felt there was little to gain in the real performance industry with these stock replacement heads. Thank goodness i held off.



    Shortly thereafter, Pro Topline is Out of Business !!



    Today, Ron Shavers picked up the line and is distributing to a few places we know. the heads flow so great, these places are shoving a bigger intake valve in them just to bump up the numbers because they do not flow well out of box. Even with a bigger 2.02 size and mediocre porting they do not catch the RT heads or the Edelbrock heads power ranges.



    Some will charge you for the HD heads plus porting and then add the cost of springs, valves, retainers, keepers, seals and any additional work. Now your totally at or over the cost of what a complete C&C ported real performance head costs with more power.



     
  16. STAR_SCREEM70

    STAR_SCREEM70
    Expand Collapse
    New Member

    160
    0
    0
    ...so look into some R/T heads? plus the cam? will those have a better combo pack...or should i look at edelbrock heads with a certain cam? so port and polishing stock heads isn't worth the effort with new valves and such?
     
  17. bluffratram

    bluffratram
    Expand Collapse
    New Member

    150
    0
    0
    Im not going to say that they are better than the edelbrock heads, but a certain Mopar Specialist engine builder has a whole tech article on how they are way better than the stock heads and they will flow better numbers than the R/T heads



    "The heads with stock valves (as shown above) exceed the flow of the stock OEM Magnum heads and are almost equal to the stock Edelbrock aluminum Magnum head and exceed the Mopar Performance R/T heads. You should see a performance improvement by simply bolting these on"



    http://www.hughesengines.com/partDetail.asp?partID=11678&eTypeID=10



    and having dealt with them before I beileve them when they tell me something. Maybe they are getting thier heads from somebody else, i dont know.

    :roll:
     
  18. southeastrt

    southeastrt
    Expand Collapse
    New Member

    32
    0
    0
    Although we are direct with Mopar in Detroit,and have been a supporter of the Dakota RT Club since it began and other Dodge forums as well, It has been proven on dyno and track the RT cam is pretty lame and will not supply you with any major gains.

    The only time those are used are in the situations involving emission states and even then there are custom grind cams offering alittle more gumption which might slip through the emissions check.

    There is no secret that power comes from the heads, the biggest mistake you could do is get locked into unproven suggestions some use for sales and lose the opportunity to get what your really after.

    It's really simple, check around and see what others used to accomplish the task.Guaranteed, anything over 400 hp like the 11 second trucks out there including the 10 second RT we built a 408 engine are running real performance cylinder heads that can accomodate that type of power.

    If your into a stock rebuild or power levels under 400 hp, you can re-work a stock designed set of heads to achieve those goals.

    For all out power and torque there is a reason for Edelbrock, RT, Indy, Brodix,World type cylinder heads which use totally different port configurations for a reason.

    Drop me an email or send a number and i can go further into this. Maybe save you some grief and give you 10-15 people you can speak with that will let you know whats up.











     
  19. Silver

    Silver
    Expand Collapse
    New Member

    667
    0
    0



    I thought the stock heads were too thin of castings to be able to do much with? Plus, word on the street is they are prone to cracking anyway.
     
  20. southeastrt

    southeastrt
    Expand Collapse
    New Member

    32
    0
    0
    Thats true,the heads themselves are little to be desired for all out HP and performance but slap a blower or 100 shot on there and your 400hp without pulling them.



     

Share This Page