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Need engine recommendations...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by txbartman, Nov 19, 2001.

  1. txbartman

    txbartman 1/2 ton status

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    Alright, I am tired of my tired ol' 305 and I am swapping in a 350. My original plan was to go with the basic Scoggins Dickey 249HP GM Crate 350. I figured if I added Edelbrock Performer intake and cam kit, Edelbrock TES headers, and roller tip rockers, I could squeak out 270 or so HP and about 320 ft lbs torque.

    But, today I have been considering the 330HO GM Performance crate. I would add the Performer Vortec intake, TES headers, and the roller tip rockers but keep the bigger cam that comes in this crate. This should give me about 340-350 HP and about 400 ft lbs of torque.

    What would you guys recommend?

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  2. BurbinOR

    BurbinOR 3/4 ton status

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    If you have the bucks, and are anything like any of us testosterone-raging males, go for more POWER. Can never have enough of that.............am I right?

    Hormonal rage in progress................powerrrrrrrrrrrrrrrrrrrrrrrrrrr

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  3. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Can you say GEN IV BBC? [​IMG]

    I love the big block, but you can't really go wrong with any GM crate engine. The only suggestion I have is to buy the biggest thing that you can afford, and enjoy every horse you can pull from the combo.

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  4. smack

    smack 1/2 ton status

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    Seems like more and more people are claiming that stroke is the way to go. Build a 383 or 400, I'd bet you'd have better bottom end than the 350HO crate and you'd spend a lot less!
    Just my .02

    '87 Jimmy
     
  5. solowookie

    solowookie 1/2 ton status

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    if you are rock crawling then the more HP you have the more parts you are gonna break so I'd go the cheap 350 route... if you want a happy medium then a 350 ho, and if you are looking for something better a 383, and if you really wanna rock then a BBC!

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  6. 1979Jimmy

    1979Jimmy 1/2 ton status

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    Just stroke it. With my 383 im managing some pretty impressive power with some bolt on accesories.

    79 Jimmy, 5" lift 35 M/T with a 383 puttin out 400hp and 450lb/ft. Locked front and back.
     
  7. Zepplin

    Zepplin 1/2 ton status

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    Yeah just stroke it. I have a 496 just begging to go into my Blazer this winter!! Can't wait until the teardown begins.

    74 Blazer
    Zepplin
    Check out my Blazer
    <a target="_blank" href=http://community.webshots.com/user/zepplin1976>http://community.webshots.com/user/zepplin1976</a>
     
  8. coolhandluke

    coolhandluke 1/2 ton status

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    just this weekend you said it was your low hp that let you run a the front locked 10 bolt, without trashing it, how much do you really need? It would suck to shell out all your dough for a nice high hp engine, then start breaking tons of stuff and be broke and unable to fix stuff (like me!)

    I never thought I'd steer someone away from hp....

    sometimes nothing is a real cool hand

    what we have here is a failure to communicate
     
  9. K5Jimmy

    K5Jimmy 1/2 ton status

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    I'm sorta lookin' at the Scoggins TBI performance motors.....280hp/416lb for about $2700......or the 330hp/410lb at $2950.....says both work with stock TBI computer and chip.....the 416lb comes in at 2500rpm, and the 410lb come in at 3000rpm.........both are complete with the Vortec heads and Vortec TBI intake......seems like a reasonable amount of reliable power for a long term daily driver........seems usually that the hotter motors are more tempermental , and offer an increased opportunity to break stuff in the drivetrain.......of course the stock answer is to go D60/14ff with a built tranny and a 205.....then ya need a 502, etc......all of which defeats the purpose originally stated......I think either of these motors offer a good compromise between power and budget......just an opinion.....JD

    Stuck?...Hell no..I still got some gas left..
     
  10. shupach

    shupach 1/2 ton status

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    brian, my friend from school and I have decided that we ever buy another engine that it would be the 632 CI!!!!!!!!!! v8 from www.theengineshop.com . with 950 hp and a 9.5:1 compression ratio, how could u go wrong?

    phill
     
  11. DesertDueler

    DesertDueler 1/2 ton status

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    Sure you would only need 2.5 ton axles, powerglide tranny and a 2.5 ton transfer case. Then just wait to brake more parts and fix it again.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  12. shupach

    shupach 1/2 ton status

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    pessimistic are we desert dueler. u just wait till i get my 632 ci v8........

    phill
     
  13. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Giddy-up 406! 448 lb/ft of torque @ 3,500 RPM and 362 Hp at 4,400 RPM. Thats using the second smallest comp cams 4x4 extreme cam, which delivers over 19" of vacuum. You could get even wilder than that but whats the use of getting high numbers if the motor has to be wound up tight.

    <a target="_blank" href=http://new.wavlist.com/movies/031/ag-blow.wav>"I ain't nobody, dork."</a>
    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  14. BorregoK5

    BorregoK5 1/2 ton status

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    If your out for speed and high rev's go for the short stroke heavy cam motors just keep in mind that your generating heat in all your components when their under load. If your looking for brute force for crawling and towing, then go for a longer stroke and a more conservative cam, it will probably last you longer.

    I started with nothing and I still have most of that left! - <a target="_blank" href=http://www.echobit.com:81/k5/> Pictures</a>
     
  15. JIM88K5

    JIM88K5 1/2 ton status

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    If it's your daily ride,go mild...
    You'll save your self time money broken parts &amp; GAS.-Jim


    88 5.7 5in lift( I tell my wife it's ten) 35"procomp at's
    700-208-456-3in exh w/flowlowder 10 bolts & some ORD stuff
     
  16. 84_Chevy_K10

    84_Chevy_K10 Banned

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    You CAN have too much power, and your choice of high RPM motors and big CID is going to kill any chance of fuel mileage.

    Nobody here cares how much horsepower they have at 5000 or more RPM. Most of us, if they drive like I do, seldom see that kind of RPM. I tried 4500 today...my truck sounded like a freekin' NASCAR engine on TV.

    So, forget those high end HP motors that are just going to spill unburned fuel right out the tailpipe at the cruise RPM you're at on the highway.

    Look for a motor that is built to operate in the 2000-2500 RPM range that yours runs in overdrive or you're asking for a truck that can't pull itself.

    I just simply can't see the point of a high HP motor in a truck.

    I have a DD 2000 estimated 250 HP @ 4500/330 ft.-lb. 305 in my truck. It has 4 bbl heads on it, a Performer intake, a Comp Xtreme 4x4 250 grind cam, 1 1/2" headers and 2 1/4" dual exhaust. Built completely for low end torque, not horsepower.

    Show me a stock vehicle that can make that kind of power at that low of RPM from that little bit of CID. That's not a typo, it's a 305, I swear!

    Whether it's 250 HP or not, I don't care. My truck hauls ass for a 4wd, and has all the power I want. I can and have exceeded 100 MPH in my truck (I think). It flies. And the low-end torque really slams you back in the seat on heavy accleration.

    Want to know something good about all of this???

    A torque motor is way better off road too!!

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  17. CaptCrunch

    CaptCrunch 1/2 ton status

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    Yup it really depends exactly what you want to do with it. Stroker motors are great for heavy daily drivers that don't see much rpm, but if you do mud on occasion or strickly mud you definetly may want the expanded rpm range ( over 4500 rpms). Another item is what kind of milage do you want to get, I remember right your's is a dailiy driver as well. If that is the a BBC may not be the best idea.

    383's and 406's are torque monsters! Fun engines as long as you have the brains as well to wheel with them. Much like when you get lockers... you just add that much more of a chance to break parts if you aren't careful. I'm a firm believer in these motors though you need to shell out a bit more coin for heads for the best results, but even sub par heads on an application can work fine. Another semi forgotten motor if you can find one is a 396/402 BBC. The right build up and some ported decent heads from a stock application can make lots of power and torque with similar gas milage to a built 383 or 406.

    I guess if those are your exotic and erotic.... then that leaves the plainjane blue collar work horse 350. I wouldn't underestimate the power you can make from on. While the other motors are great... they also cost quite a bit. You can easily build up a solid and reliable prefromer of 300 or so ponies and about 12 mpg. I guess the biggest deal would be the heads. The vortecs are your bang for the buck head. Awsome flow at low rpms and the heart shaped cumbustion chamber will help out your gas milaige a touch. Mid rpms and lift ranges see a drop in performance but still very solid! 4th best numbers on the market right now behind the Cansfield lines and the AFR190's. Anything in the uppper rpms they tend to kinda fall flat on their face. Some porting in the ports will help in this area, just leave the Combustion chambers alone. But for the 400-500 price tag and a few minor issues/hassles you can't beat the vortecs. Either Cansfield or AFR head (either 190 0r 210) will probably performe mutch better in the upper rpm ranges, a tad better in the mid rpms, and tad worse in the lower rpms (depending on you selection). Great results... just look at approx 1200 bucks a set.
    The next major choice will be cam... There I would figure out exactly what you are going with parts wise and give a call to the brand of cam you chose's tech line. Just make sure you stay off the overlap (aka kill the choppy idle) . Most guys find a nice grinds in the 260 area.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  18. txbartman

    txbartman 1/2 ton status

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    As I kinda expected with this post, I have received a lot of good advice, but much of it is vague. Let me give some more details...

    Priorities for me in an engine: (not necessarily in this order, but close)
    1. Torque - its a 4x4 with 35" tires and 4.56s gears. I want power. I do some mud, some sand, few rocks, mostly just good ol' fashioned trail running. I also have a 4,000 lb boat to pull. My current 305 won't pull the bottom out of a wet paper bag!

    2. Fuel economy - This is relative. My tired 305 gets about 9 MPG. In addition, over the years, it has deteriorated and now requires 92+ octane. So, if I can get 10-12 MPG and use regular unleaded gas, I am getting a big savings.

    3. Street legal - Live in Dallas area with emissions restrictions. I want to keep this thing emissions legal. So, I am not going too wild.

    4. Somewhat daily driver - I drive this truck 3-4 times a week to work (just because I love my truck). 20 miles each way, mostly highway.

    5. Ease of building - I have built engines before, but I just don't have that kind of time these days. I am looking at a long block for the most part that I build up from there.

    6. Cost - I am trying to keep everything under $3,000. This includes the engine and ALL its accessories (water pump, fuel pump, balancer, headers, intake, etc.) The ONLY thing going onto my new engine from my current one is the q-jet, after I rebuild it. Everything else will be new.

    7. Scalability - I want a good, solid, reliable base engine that I can always tweak later without having to perform a full replacement like I am now to the 305.

    Final thoughts... I don't want a BBC. Don't need it. I have other things I can throw my money at than a BBC right now. I have mostly stock drivetrain (10-bolts f/r with lockers, 208, 700R4). I don't want to tear things up too bad. I know a lot of that control comes with the right foot, but I wanted to mention it. Finally, this is my 4x4. I have a Firebird to fly in. I seldom ever get it above 65 maybe 75 MPH on the highway. Its not a NASCAR racer.

    I don't mean to downplay or unhappy with any advice I have received thus far, but does this help direct y'all's thoughts?

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  19. solowookie

    solowookie 1/2 ton status

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    a stock BBC can give ya 14-15 MPG if tuned right... just throw one in and be done with it.

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  20. HarryH3

    HarryH3 1 ton status Author

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    K5Jimmy, can you post a link to those Scoggins-Dickey motors? I haven't seen those on their web site. But I'm pretty skeptical about being able to run a 280 or 330 HP engine using a computer and injectors that were desinged for a 200 HP engine. [​IMG] You're typically talking a custom chip that "knows" about all the changes and possibly going to the larger 454 throttle body and higher flow injectors in order to work with an engine that has that big of a difference from stock.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     

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