Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 
Like Tree19Likes

Thread: Chevrolet performance 350 crate motor
          
   
   

Reply To Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 21
  1. #1
    DrGoob is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2015
    Location
    hartland
    Car Year, Make, Model: 69 Chevy C10
    Posts
    11

    Question Chevrolet performance 350 crate motor

     



    So i am planning on buying a Chevrolet Performance 350 C.I.D. 290 HP Engine Assemblies 12499529 from summit racing. I am putting this into my 1993 gmc k1500, and i plan on putting a new y pipe in the exhaust and taking out the cat converter (shhhh) but im not sure what to do with the fuel. Chevrolet performance says that they came up with that 290hp using a holly 670cfm tbi. I have heard to never use the holly tbis because they are unreliable and overpriced.... i also saw that you can put a 18psi spring in the throttle body and upgrade the fuel pump..... im not really sure what to do. Ive never done much with car engines, i can do stock repairs and such but i dont have any experiance in modifactions. What can i do to get that 290hp or close?
    Last edited by mrmustang; 08-16-2015 at 02:34 PM.

  2. #2
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor CHR Contributor Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Tigard
    Car Year, Make, Model: 63 Nova SS
    Posts
    2,505

    Welcome to CHR!

    Before you get too far, go buy a book on building small block Chevys like this one - http://www.amazon.com/Vizards-Perfor.../dp/1932494847 Study all the sections and get familiar with common terms and components among the small block.

    The engine you're referencing is a non-Vortec replacement (used in a lot of trucks) that is a good solid base to build on. Bear in mind that this is an 8:1 compression ratio engine that will peak at about 5500 RPM - regardless of what intake system you choose. I'd recommend that you download this document and read it.

    http://www.chevrolet.com/content/dam...e-12499529.pdf

    It fills in all the blanks and actually gives part numbers for Chevrolet flexplate/flywheel, harmonic balancer, intake manifold, distributor and holley 670cfm carburetor. You can buy it all from Summit or source locally.

    The document also gives information on headers, H-pipe and exhaust and all the little bit and pieces you'll need.

    Break in is critical as this is a flat tappet cam. Use a zinc additive in the oil.

    Again, welcome and let us know what you decide!
    Glenn
    NTFDAY and 36 sedan like this.
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

  3. #3
    DrGoob is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2015
    Location
    hartland
    Car Year, Make, Model: 69 Chevy C10
    Posts
    11

    Glenn thank you very much for that pdf. Since the current motor has a tbi not a carb, how would i go about switching it out? Do you thing it would be a better idea to spend the extra 700$ and getting the same motor from jegs with the carb, intake, distributor, and stuff all included? it says the motor from summit doesnt come with a water pump, harmonic balencer and stuff, but would i have to buy all that stuff new or could i just take it from the 350 tbi that is currently in the truck?
    Last edited by mrmustang; 08-17-2015 at 05:06 AM. Reason: links not allowed-removed

  4. #4
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor CHR Contributor Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Tigard
    Car Year, Make, Model: 63 Nova SS
    Posts
    2,505

    In that this is your "first one" it may be best for you to buy as complete an engine as you can afford. Get as close as you can to just having a true turn-key. I'd ditch the fuel injection and go with a carb -but that's just me as I'm an old school guy.

    Depending on what your funds are, there are some real deals on small blocks with roller cams that come complete pan to carb requiring very little effort to have in your truck and running. These engines have been test fired and do not need any special oil additives as they're roller cams - eliminating the potential issues with flat tappets.

    This one looks pretty good to me: http://www.summitracing.com/parts/hp...make/chevrolet 350 horse and you and a buddy could have it in and running in a day!
    techinspector1 likes this.
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

  5. #5
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Sep 2007
    Location
    Gardner, KS
    Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
    Posts
    10,678

    I would definitely consider switching to a roller cam engine vs flat tappet as Glenn suggests. You may get lucky, fire your new engine on the first crank and get it smoothly up to speed for initial break in, but if not you can start eroding cam lobes with nothing more than extended cranking, chasing gremlins that are keeping you from firing. Oil additives are a must with flat tappet, but why take the risk?
    techinspector1 likes this.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  6. #6
    DrGoob is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2015
    Location
    hartland
    Car Year, Make, Model: 69 Chevy C10
    Posts
    11

    Glenn that looks like a good motor. It says carb and manifold not included. What would you suggest for a carb? If i swap from a tbi to a carb, would there be any major modifications i would have to make? What about the auto tranny?

  7. #7
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor CHR Contributor Visit my Photo Gallery
    Join Date
    Mar 2005
    Location
    Tigard
    Car Year, Make, Model: 63 Nova SS
    Posts
    2,505

    The add at Summit is a bit unclear - shows a manifold, but to be sure, I'd call ATK directly Chevy 350 Mid Dress Engine 350HP and talk to them. They make a quality line in base, mid-dress and complete turn-key. Ask them exactly what comes with each level. Again, the closer you get to turn-key the easier this will be for you. Remember that without a minifold typically means no distributor as well.

    If you do opt to buy a engine without the intake manifold I like the Edelbrock 7104 - Performer RPM for Q-Jet with this carb http://www.summitracing.com/parts/sum-210216/overview/

    Great performance and I love the sound of the Quadrajet secondaries coming to life.
    Last edited by glennsexton; 08-17-2015 at 05:03 PM.
    Henry Rifle and rspears like this.
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

  8. #8
    dannronn is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2013
    Location
    Graham
    Posts
    4

    Streetrodder Mag. has had an excellent article on the very same engine on how to get 340 hp plus and a bunch of torque out of the same Summit engine. I suggest you look it up, very cheap HP.
    glennsexton likes this.

  9. #9
    firebird77clone's Avatar
    firebird77clone is offline CHR Member Visit my Photo Gallery
    Join Date
    Sep 2005
    Location
    Hamilton
    Car Year, Make, Model: 69 nomad, 73 charger, 74 vega
    Posts
    3,877

    For alternator, it is such an easy fix, I'd say use the old one. But the starter is harder, (especially if you have headers, might want to consider a new one, and the water pump, well there is a lot to do to change that, the fuel pump is a real easy fix...

    It's not the last time you will wrench on it. But you don't want to find yourself a month, or a year from now saying " for another fifty bucks, I wouldn't be working on it now.
    .
    Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
    EG

  10. #10
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
    Join Date
    May 2003
    Location
    Zephyrhills, Florida, USA
    Car Year, Make, Model: '32 Henway
    Posts
    12,423

    Quote Originally Posted by glennsexton View Post
    These engines have been test fired and do not need any special oil additives as they're roller cams - eliminating the potential issues with flat tappets.
    What issues you say Dr.? Here, take a look......
    http://www.crankshaftcoalition.com/w...ips_and_tricks

    .
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  11. #11
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
    Join Date
    May 2003
    Location
    Zephyrhills, Florida, USA
    Car Year, Make, Model: '32 Henway
    Posts
    12,423

    Quote Originally Posted by glennsexton View Post
    This one looks pretty good to me: http://www.summitracing.com/parts/hp...make/chevrolet 350 horse and you and a buddy could have it in and running in a day!
    Yep, looks pretty good to me too, roller cam and coming in under the $10/hp figure that it will take to build a good motor.

    .
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  12. #12
    DrGoob is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2015
    Location
    hartland
    Car Year, Make, Model: 69 Chevy C10
    Posts
    11

    Although i wish i could get that 350 hp motor glenn suggested, i dont have much of a budget to work with.... im not really sure what i can do... i have to do this before winter comes, but i think i will only have around 2500 total by then..... im not sure. I have a real nice distant family member that used to race pro stocks at the local track and he might have a 350 or 2.... i dont know. Ill see what i can do.... thanks everybody

  13. #13
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Sep 2007
    Location
    Gardner, KS
    Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
    Posts
    10,678

    DrGoob, a respected engine builder who has become a friend writes an occasional column for one of the rags, and his statement was that with today's oils it's not a question of IF a flat tappet cam will fail, it's only a question of WHEN. Now there are some who will disagree, and you can roll dice if that's what you choose, but in your place I'd find a way to get a roller cam motor as opposed to taking that chance. Yeah, you can run Joe Gibbs oil and eliminate a lot of the risk, but I'm not convinced that you can find an oil today that matches what all of the majors put out fifteen or twenty years back.....
    Rrumbler, glennsexton and 36 sedan like this.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  14. #14
    jerry clayton's Avatar
    jerry clayton is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2006
    Location
    Bartlett
    Posts
    6,830

    what engine do you have in the truck now------it should be a roller cam one piece rear seal block

  15. #15
    DrGoob is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2015
    Location
    hartland
    Car Year, Make, Model: 69 Chevy C10
    Posts
    11

    Its the stock 350 tbi that came in the truco when i bought it

Reply To Thread
Page 1 of 2 1 2 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink