Cast/Qjet > sp3/750DP - lookin : swap thoughts

Discussion in 'Small Block Tech' started by DEADMANSCURVE, Jun 28, 2018.

  1. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    So , I have been playing with the idea of maybe selling my 69 cast 350 4bbl intake and a everyday performance 800 Qjet and pulling the trigger on a TA sp3 intake . I have a nice 750DP that is rebuilt and has a little test run time on it .
    Too early or go for it ? Maybe hang on to the cast/Qjet combo just in case .
    1969 350 , oem hi comp pistons , ta 212 cam , lifters , Ta stage one springs , quick rering and new bearings .
    65 special , Muncie , 9" with 3:55 and 4:11 gear option .
    Better 350 engine and parts apart and waiting for the time to assemble n install .
     
  2. gsjohnny1

    gsjohnny1 Well-Known Member

    don't know why everybody is waiting to buy a s/p. best thing since sliced bread.
     
    Fox's Den and alec296 like this.
  3. alec296

    alec296 i need another buick

    Try it. Cam seems abit small to take advantage of the intake but would like to know how well it works.
     
  4. Fox's Den

    Fox's Den 22 years of racing the same 355 Buick motor

    I just started my car up after sitting for 5 months with the SP3 and a Holley dbl pumper. I got lazy and just cranked the motor to get oil pressure and the car tried to start itself Before I even pumped the gas! I gave it one pump and it fired right up and sat there idling while it was bone cold no choke needed, don't have one anyways.

    Is that enough info to get the SP3 put on?

    the 212 cam won't care you put the SP3 on don't worry it won't know.

    sheesh
    stolen from another player
     
  5. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    the "B" motor should be fine with the sp3 . 75 era 350 , cap screw rods , heads done with TA springs/SS valves/roller rockers , crower solid cam , amp diamond pistons , etc .
    just thought maybe putting the sp3 combo on current motor to kinda get it up n runnin' instead of just putting it fresh on a new motor combo . also I like to follow along on the sp3 trials and tribulations and results before moving forward . especially since I do not have an unlimited budget and try and do as much work as I can myself .
    but you guys have kinda confirmed what I thought .
     
  6. gsjohnny1

    gsjohnny1 Well-Known Member

    I built my own s/p because there wasn't one. next to a t/a s/p, you would swear it was a rough first version. AND it's held together with j/b weld. I have proved that it works, but best with a d/p. all I do/have done is on a budget. some stuff there is no way around it, you have to build/buy the best stuff.

    I don't know what it is going to take for anybody to believe me regarding a s/p on a 350. maybe all you guys ought to believe and say thanks to the keyboard racers. they seem to know more than me about building and racing a 350, after all they spent zero time and money building and racing one.
     
    HeavensDevil likes this.
  7. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    OH NO ! - hood clearance !!! :(
    OH GOODIE !! - have a spare hood !!! :D
    "too much cam , too much compression , too much gear" - a good motto .
     
  8. Mark Demko

    Mark Demko Well-Known Member

    Go for the SP3 and double pumper combo, BUT keep your iron intake and Q-Jet incase you ever wanna change back.
    Ive never experienced a single plane intake before, all I heard was they kill low end torque, on the 350 Buick, that info is bullshit, I noticed VERY little/no loss of low end, the Buick 350 must be magic or something:D
     
  9. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    a LONG time ago ran a tarantula on a SBM 340 . did not see a huge dif down low and rpm's really took off once it hit 4000 .
     
    Last edited: Jul 2, 2018
  10. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Just do it!!
     
  11. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    A little info update :
    Took a break from house painting today , called TA .
    Sp3 - Qjet and sq bore style , in stock n ready to ship .
    And while I was on the phone with Tim asked about the good 350 rods . One press set left , several bushed sets ready to go .
    So I guess if you are a 350 guy and cash in your 401k ---- ?
    Mmmmmmmm , I better dbl check my PayPal situation .
     
  12. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    Yup get good rods!
     
  13. hugger

    hugger Well-Known Member

    That combo would love a 125 shot
     
  14. Fox's Den

    Fox's Den 22 years of racing the same 355 Buick motor

    Got That Right!
     
  15. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    Well it's going to get a $400 shot shortly .
    I'll grab the intake first .
    Won't need good rods for awhile . Have a little bit more prep time on the "B" motor then a couple more things to gather up before laying it out for assembly .
     
  16. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    SP3 money on the way to TA .
    have to get a new blade for the Sawzall and some bandaids for that hole i'm probably gonna have to cut . we'll see .
     
  17. Swagon

    Swagon Well-Known Member

    if you have time to before you install the sp3. Id recommend porting the heads and installing the TA big valves. I just did the valves on my engine and it wants to keep pulling past 6,200 but the head is holding it back since I didnt port them. This is why cant wait for the TA heads to come out. This engine will pick up a ton with them.
     
    Mark Demko likes this.
  18. Mark Demko

    Mark Demko Well-Known Member

    Sounds like my heads I had done many years ago to install the bigger valves, the bowls were opened up some, but honestly, it wasn't a full on port job, the guides are still large, fat, and in the way:rolleyes:
    ANOTHER reason to not have a CHEVY shop do ANY Buick work.
    They have the new, young machinists LEARN on Buick stuff:mad:
     
    Swagon likes this.
  19. DEADMANSCURVE

    DEADMANSCURVE my first word : truck

    so far the heads have the TA dual springs , good guides , larger TA SS valves , equalized valve stem heights and the usual check up , cleaning and good valve job . next I guess is touching up the port areas and bowls and working on the roller rocker to stand clearance .
    actually the shop that worked on the heads for me does some pretty serious mopar stuff so familiar with rocker shaft set up etc .
     
    Mark Demko likes this.
  20. Swagon

    Swagon Well-Known Member

    Thats exactly how my heads are. Im kicking myself now because I just wanted to get the engine running. I also anticipated the aluminum heads to be out by now.
     
    Mark Demko likes this.

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