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330 HP GM Engine (350HO) With Stock Throddle Body?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dawson444, Sep 6, 2001.

  1. dawson444

    dawson444 1/2 ton status

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    I want to get the 330 HP 350 GM has. <a target="_blank" href=http://www.paceparts.com/350_ho_crate_engine.htm>http://www.paceparts.com/350_ho_crate_engine.htm</a>. I am getting it for a better price locally.
    My question is can I get away with the stock throttle body or do I need to spend $350 and get an after market one that flows 670 CFMs. It says they recommend putting a 650 CFM carb on it.
    Will I be ok with the stock intake or do I need to get a new one?
    What about running it w/ the stock pieces and swapping them out later?
    Anyone else see any problems w/ putting this engine in my 88?
    Parts guy @ dealer didn't really know too much about bolting FI stuff on the engine, you guys see any problems? BTW- I am having a shop put it in not the dealer.
    Also what little things should I replace? Water pump, dist, etc.? Thanks!

    Dawson
    Raleigh, NC

    88 K5, 6" lift, 36" TSL Radials, 14 Bolt, Rancho 9012s
     
  2. dawson444

    dawson444 1/2 ton status

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    Re: 330 HP GM Engine With Stock Throddle Body?

    Looks like I answered my own intake question. Looks like I am going to have to get a new intake, the engine has the vortec heads. Anyone know if Edelbrock makes a vortec intake for TBI? If so know what the part # is? Thanks!

    Dawson
    Raleigh, NC

    88 K5, 6" lift, 36" TSL Radials, 14 Bolt, Rancho 9012s
     
  3. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    Re: 330 HP GM Engine With Stock Throddle Body?

    Got an e-mail on a list the other day on an EFI list that read "With a 2" butterfly 2 brl, and 90#/hr injectors available no real need too. An honest 330HP from that is wasy."
    The guy that wrote it knows more about EFI than I will ever learn and has several awesome write ups about reprogramming EFI the cheap way.

    Bubba Ray Boudreaux,
    Leader of the Advance Party for
    the CSA revolution in the PRK!
    <a target="_blank" href=http://community.webshots.com/user/mdntrdr1>http://community.webshots.com/user/mdntrdr1</a>
     
  4. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    Re: 330 HP GM Engine With Stock Throddle Body?

    gm perf. parts makes a tbi to vortec aluminum manifold.

    scott,
    1989 suburban 3/4t 4" lift soon to be rollin on 33s, tbi350
     
  5. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Re: 330 HP GM Engine With Stock Throddle Body?

    They must have just came out with it. When I did my 350HO (330hp) neither GM nor anyone else made an intake for the stock TBI and vortec heads. I didn't want to spend the money on a full fuelly set up at the time so I went with the Edelbrock performer votec manifold and carb. I may still change back to a after market injection system but I haven't had the typical carb problems even on tough inclines with my 1406 and the off-road needles and seats. Some guys say you can drill out the stock TBI manifold to bolt to the vortec but I HATE LEAKS so I woudn't. If you really want the TBI do some checking before you put your money down on that motor. Good luck.
    By the way, the 350HO kicks A$$ !
    Here, check it out along with the other goodies I used. <a target="_blank" href=http://community.webshots.com/album/16887872TAzbZjYmWz>http://community.webshots.com/album/16887872TAzbZjYmWz</a>

    [​IMG]<font color=red>[/b]"Rid'in HigH in my K5"[​IMG]
    ....[​IMG]<font color=blue>[/b]"8" Lift -<font color=purple>38.5's"[​IMG]....
     
  6. dawson444

    dawson444 1/2 ton status

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    Re: 330 HP GM Engine With Stock Throddle Body?

    Anyone help me in doing checking on stuff before I get the engine? Anyone know anything that will help me? Don't they make adapter places that will allow it to bolt up? Thanks guys!

    Dawson
    Raleigh, NC

    88 K5, 6" lift, 36" TSL Radials, 14 Bolt, Rancho 9012s
     
  7. txguy

    txguy 1/2 ton status

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    Re: 330 HP GM Engine With Stock Throddle Body?

    Storm Trooper, I was looking around getting ideas to get a bigger engine. I found that one off of GM's site. What type of mileage do you get with it? Right now, mine is also a daily driver.
     
  8. solowookie

    solowookie 1/2 ton status

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    I just got the new GM Perf. intake for the TBI and Vortec heads... part # 12496821... I'd get the from Jim Pace Chev... a little more expensive then paceparts.com

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  9. solowookie

    solowookie 1/2 ton status

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    p.s. you might wanna check the cam to verify it is computer compatible... I'm assuming it isn't so you man wanna check into that.

    I ended up using crane cam #114122 (comes with lifters from summit for $134)... this cam was recommended by <a target="_blank" href=http://www.fastchip.com>fastchip.com</a> when I called them about getting a custom chip burnt...

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  10. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Re: 330 HP GM Engine With Stock Throddle Body?

    I'm not sure but it's not bad at all. It took me about a tank and a half to get to Moab about 288 miles and a 22gal.? tank = something like 9 mpg at 75 mph over one 11,000ft. pass with 38.5"s, the windows down, fully loaded including spare axles, tools, beer and food. (Heavy metal playing in the background). Took us about 5 hours. [​IMG] [​IMG]

    [​IMG]<font color=red>[/b]"Rid'in HigH in my K5"[​IMG]
    ....[​IMG]<font color=blue>[/b]"8" Lift -<font color=purple>38.5's"[​IMG]....
     
  11. dawson444

    dawson444 1/2 ton status

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    What does it mean if the cam is computer compadable? How would I find this out? What do I need to do if it isn't? What is a good cam you guys would reccomend (cheap is good)? Thanks!

    Dawson
    Raleigh, NC

    88 K5, 6" lift, 36" TSL Radials, 14 Bolt, Rancho 9012s
     
  12. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    The one Jeff (solowokie) suggested is a good cam. What "computer compatible" means is that the profile/function of the cam won't freak your computer out. The Crane Compucam Jeff listed is a good example of one that was deigned with the stock computer in mind. I'm looking at the 114112 for mine as it says it give better low-end torque. The cam that comes in the 330 is NOT very computer friendly according to GM Goodwrench. They suggested a cam swap as well.

    Good Luck &amp; please let us know how you make out.

    Brian
    89KBlazer

    Build it Right or Don't build it at all!!
     
  13. solowookie

    solowookie 1/2 ton status

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    you cannot use cam 114112 unless you have a 305...

    after reading a warning on summit's page I called crane becauase I like the characteristics of that cam more. they told me that cam will NOT work with 350's, and I needed to use 114122... suppose to advance 5 deg. and it will give the characteristics you want out of the 114112...

    114122 is the correct cam.

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  14. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    Funny Jeff! I talked to a guy A.Cannon (??) via email from Summit &amp; he said that that would be a good one for the 350 if you want low-end. I read the warning too but looking at the cam specs, it looked ok! Oh well, guess I'll probably go with the 114122 like you. How do you find yours for low end? Good? That's my only concern as Crane specs it for 1500-4500 RPM, don't they??

    Brian
    89KBlazer

    Build it Right or Don't build it at all!!
     
  15. solowookie

    solowookie 1/2 ton status

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    they claimed the 5 deg. (crane) would give the same characteristics...

    man when I called them they were like do NOT do the 114112...

    I can't really tell ya how I like it because I'm still working on getting that engine together. I get the parts to finish it up on monday so I'm hoping I'll have it running monday night / tuesday sometime...

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  16. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    Thanks Jeff

    I was just about to order my cam! [​IMG] I may check out some other cam companies too before I order. Also, sounds like it'd be wise to talk to the cam companies first before ordering anything; if nothing else to get a yes/no from them!

    Brian
    89KBlazer

    Build it Right or Don't build it at all!!
     
  17. solowookie

    solowookie 1/2 ton status

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    hey,

    capt is the one who steered me onto calling all the companies! I was going to go with a crower cam or comp cam, but the place burning my chip so highly recommended the crane cam I ended up going with it.

    the guy from <a target="_blank" href=http://www.speedomotive.com/>speedomotive.com</a> swears by a comp cam (don't know which one)... I think its all sixes...

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>http://coloradok5.com/gallery/Jeffs-Stuff</a>
     
  18. ftn96

    ftn96 1/2 ton status

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    Another thing to think about or ask someone is the size of the jets in the Stock TBI unit. I dont think they will give you enough gas injection for the amount of horsepower that the HO 350 wants to give you. The fastchip company should be able to help you with that as well. Good luck and let me know what you find out. As Im in the planning stages for the very same swap.

    tRustyk5 for President!!![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  19. Nrose07

    Nrose07 1/2 ton status

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    Number 1. If you want to spin your motor over 4500rpm you will need to upgrade to Holleys or Turbo City's 670cfm TBI. Your stock 525cfm will only support about 4500rpm. Since the power band of the 330hp motor is above 4500, well you get it.
    Number 2. I made the swap to vortecs long ago and did not have a dedicated Vortec/TBI avaliable to me. Use GMP's intake, it will save alot of hassels that I had to conquer.
    Number 3. You will have to have a custom prom burned, so I would leave the cam that is in the crate motor there. People hear fuel injection and then think they have to have a computer cam. Sure if you had the stock prom maybe, but a good programer will incorporate your cam into the prom. I use Street &amp; Performance Electronics out of North Little Rock, AR. My cam that I run is a Crower 000241 Advertised duration 214-276degrees, @50 214-218 Lift is .456-.458 Most say this is too big but with it advanced 4 degrees and the prom built for it, friggin unbelivable.
    Have fun!

    Displacement, cubes, and did you say you drive a riceburner???
     
  20. Cavalry

    Cavalry 1/2 ton status

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    I am doing this exact swap right now. I talked with fastchip and they said I can get all the power out of my 350HO with 350 injectors (55lb?) and their chip, and the cam that came with it will be fine. Adapter plates are available through turbo city and howell. I think I may be making them too soon if the intrest is out there. You will also need a O2 bung on your exhaust.

    "There is a fine line between hobby and mental illness"
    Luke
    84 K5
     

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