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350 cid questions

  1. #1
    I'm famous ! Lucky's Avatar
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    Default 350 cid questions

    I have a 92 chevy 350 cid ( original throttle body truck engine )
    I would still love to build a turbo motor , but finacially its not in the plan .

    So i have this motor , a tpi manifold .

    I am thinking of utilizing the manifold and computer system for my 70 chevy pick up . I am going to go threw the engine and would like some fun oppionons on how YOU would build it for the applications .

    Here are my paramiters
    Towing the boat
    gasmilage
    I don't want it to be a slouch .

    Having owned a 92 camero z-28 -that motor always impressed me, and i was able to pull 24 mpg in it . I would like to improve on that senerio ( z28)
    What compression / cam and fuel pressures along with programing would you use ? I am/was planning on running a camero computer and wiring harness for a manual set up !

    my truck is a 70 with three speed 1:1 finail ration / 3:07 gears / 30" tires Help me out with some senerios !
    Last edited by Lucky; 01-25-2010 at 03:18 PM.
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

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  3. #2
    cfm
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    A lot of options, just depends on $$$.

    First issue I see, is the towing part along with those rear gears. Youch !

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    Quote Originally Posted by cfm View Post
    A lot of options, just depends on $$$.

    First issue I see, is the towing part along with those rear gears. Youch !
    I know- but these lil flatbottoms don't weigh nothing
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by Lucky View Post
    I know- but these lil flatbottoms don't weigh nothing
    I used to tow with a 350 single 500cfm carb, crate motor,3:07 gear's , the bed FULL of camping stuff, my hydro, and the girl friend,, had 245-60 -15 tire's , about 26" tire's though ,,towed fine,,, ...........Eric
    Last edited by alkyexpress; 01-25-2010 at 05:27 PM.

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    Senior Member EVILFORCE's Avatar
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    Put a Whipple on it and you are done.
    No Fool Like A Old Fool is there?

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    Purple headed member Quickjet's Avatar
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    Chris, Your truck weighs twice as much as your Camaro did and with those tall tires and no gear, you can throw your around town gas mileage and power out the window.
    The GM TPI setup is garbage (and that's being nice). You would get better performance out of a Performer RPM manifold and a 750 carb.
    For a budget dealio I would run the Vortec heads, 9.5 compression, a nice Hydrolic roller cam in the .485 range with about 225 @ .50 on the durration and a 110 lobe cnt. Performer RPM Air Gap and a 750 Holley.
    I would then install an 11 inch 2,200 converter and a set of 3.73's in the rearend.
    Headers, 2.5 exhaust and your done.
    Quote Originally Posted by thatguy View Post
    I used to believe QJ was a gay black man..

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    Keith...
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    Senior Member EVILFORCE's Avatar
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    Sorry to disrupt this thread BUTT. Someone here needs to change his avatar. Are you catching my drift SCOTT? Is that a diaper? Must be cold as you have no package. Oh ya. Did you get treated for them warts yet?
    No Fool Like A Old Fool is there?

  10. #8
    Purple headed member Quickjet's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    Sorry to disrupt this thread BUTT. Someone here needs to change his avatar. Are you catching my drift SCOTT? Is that a diaper? Must be cold as you have no package. Oh ya. Did you get treated for them warts yet?
    That's not me in the pic. It's a friend of mine and I am swinging from his nuts. You just can't tell in the pic.
    Quote Originally Posted by thatguy View Post
    I used to believe QJ was a gay black man..

    Quote Originally Posted by Havasu Secret View Post
    Keith...
    Real Fast Big Blocks are always V-Drives

  11. #9
    BTC cardcarrying member sunkisst's Avatar
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    Default X's 2 0n the Vortec heads

    Quote Originally Posted by Quickjet View Post
    Chris, Your truck weighs twice as much as your Camaro did and with those tall tires and no gear, you can throw your around town gas mileage and power out the window.
    The GM TPI setup is garbage (and that's being nice). You would get better performance out of a Performer RPM manifold and a 750 carb.
    For a budget dealio I would run the Vortec heads, 9.5 compression, a nice Hydrolic roller cam in the .485 range with about 225 @ .50 on the durration and a 110 lobe cnt. Performer RPM Air Gap and a 750 Holley.
    I would then install an 11 inch 2,200 converter and a set of 3.73's in the rearend.
    Headers, 2.5 exhaust and your done.
    I built a 400 sbc for my Suburban, Vortec heads, new from Summit. The RPM Air Gap manifold, 750 Holley. Now, I bought Dished pistons to keep compression down. This is a 4X4 Suburban tow vehicle.There is a complete build in the book"How to build BIG-INCH Chevy Small Blocks" Publication by Graham Hansen. Published by CARTECH. www.cartechbooks.com Good luck with the truck. I was getting 10 mpg with the 350 I took out. Now getting 11.5 mpg with the vortec head 400. I would give credit to the heads,being a much newer and better head than the older design heads.
    Last edited by sunkisst; 01-29-2010 at 01:30 PM. Reason: more

  12. #10
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    thank you Guys
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

  13. #11
    I'm famous ! Lucky's Avatar
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    gears will change after the 6 is gone - Probably 3:73 or just a wee higher - for fuel miliage
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

  14. #12
    Senior Member alkyexpress's Avatar
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    Is your truck a 2 or 4 wheel drive ?..........Eric

  15. #13
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    Quote Originally Posted by alkyexpress View Post
    Is your truck a 2 or 4 wheel drive ?..........Eric
    two wheel . freway cruiser -
    " my carbon footprint is gonna kick your green ass"


    Quote Originally Posted by 396_Ways_To_Spit View Post
    WOWO!!!!! THat has to be the most beautiful crank that Ive ever seen!!!!!!!!!!!!!!!!


    Quote Originally Posted by MAXIMUS View Post
    He has been allowing me to park my equipment in his backyard for a few years now...
    [/SIGPIC]

  16. #14
    New here Beer:30's Avatar
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    IF you stick with EFI, try to use your TPI manifold. They are bottom-end torque/hp intakes. They run out of breath around 4500, which is why people started making larger-tube runners for them. However, for towing, TPI is an excellent intake.

    HOWEVER, if you changed to Vortec heads - which is an excellent value and will definitely put your motor where you want it powerwise - you would have to spend a few more $ and get the Vortec TPI base. The runners and plenum will bolt right to it. Ultimately, that would be the best of all worlds for you.

    I would keep the cam down around 218/222 @ .050 and .450-.480 on the lift. That would still be a flat-tappet motor / unless you want to spend the coin for a roller setup, but not necessary. The smallest Lunati VooDoo (256) would be an excellent cam choice for your application. I have just finished breaking-in the 262 version and it would probably work for you as well. It works well off-idle, but really starts pulling at 1400 or so. The 256 version would probably allow you to de-clutch at idle with your boat in tow. The VooDoo 256 cam with a TPI intake would provide more bottom-end than you could handle.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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