350 head project.....

Discussion in 'Small Block Tech' started by Buicks4Speed, Jan 30, 2007.

  1. fastest430

    fastest430 Well-Known Member

    That's a good steady hand you got there. Nice job:TU:
    Be safe and wear your safety glasses:Smarty:
     
  2. bad-buford

    bad-buford Well-Known Member

    Just to put the SSB head in perspective to the "other brands" after market heads.

    #60999 SBC RPM Edelbrock 2.02/1.60 valve size

    Int Ext
    .100-64 54
    .200-130 104
    .300-183 144
    .400-226 169
    .500-229 175
    .600-232 182

    #60989 SBC ETEC 200 cc port
    .100-67 57
    .200-122 110
    .300-175 153
    .400-223 182
    .500-252 196
    .600-259 204

    #77629 SBC Victor Jr
    .100-67 64
    .200-119 112
    .300-177 153
    .400-226 188
    .500-265 207
    .600-281 217

    #60779 SB Mopar
    .100-69 64
    .200-129 108
    .300-188 142
    .400-232 171
    .500-249 183
    .600-251 190

    #60229 SBF RPM head
    .100-72 57
    .200-132 104
    .300-183 142
    .400-216 159
    .500-245 170
    .600-249 174

    #77179 SBF Victor Jr
    .100-64 54
    .200-127 108
    .300-186 140
    .400-234 167
    .500-268 189
    .600-291 195

    #60579 Pontiac head
    .100-72 56
    .200-138 106
    .300-198 141
    .400-239 163
    .500-264 175
    .600-275 185

    #60519 Oldsmobile head
    .100-67 54
    .200-131 102
    .300-195 137
    .400-247 163
    .500-265 179
    .600-268 188

    Dart Heads (web site only listed max flow numbers)

    165cc port

    Int/Ext
    210/175

    180cc port

    Int/Ext
    222/175

    200 cc port

    Int/Ext
    262/175

    215cc port

    Int/Ext
    268/175

    230cc port

    Int/Ext
    308/207Ported, 1.92/1.55 vlaves

    And just to recap our ported flow numbers on the SBB head with a 1.92/1.55 valve size.

    Intake Exhaust

    .100 - 60 53
    .200 - 116 102
    .300 - 172 145
    .400 - 215 175
    .500 - 247 177
    .600 - 262 182

    This is enough airflow to support well over 500hp N/A in a perfect world:Smarty:

    Now of course if you ported any on the above aftermarket heads you could far exceed our ported SBB heads, but most hotrodders buy aftermarket heads as a bolt-on item and they do not spend 500-1000 extra bucks on port work on top of the 800-1200 dollars they spent on the heads.

    We will continue to keep updating as data comes in. Hopefully in the coming months we will have our 350 project engine to the Dyno:3gears:
     
  3. Hector

    Hector '79 Buick Limited

    Great thread guys:beer .
     
  4. alec296

    alec296 i need another buick

    so you need another set of heads to "practice" on
    i can send you mine as my car is apart for restoration:laugh:
     
  5. WickedWay

    WickedWay Got Torque?

    I've no clue what the above information refers to.., not even sure what they mean by flowing the heads. So in my ignorance, I'm going to toss the valve sizes suggested to me in here and hopefully grab some opinions from knowledgable Buick guys and girls.

    I was told to put 2.02 exhaust vales, and 1.88 intake valves in my buick, with a three angle valve job (Can see potential problems with this suggestion, as this came from a Chevy fanatic). It's a 350-2, but I'm having it bored .030 over and am attempting to get around 400 hp out of it when I'm done. I do want to have them ported, and have picked out a TA intake, Poston cam, pistons, and headers. Wanting to run an Edelbrock 600 cfm carb. This is the first motor I've ever completely rebuilt, and my lack of knowledge is... well, fustrating. So... I'm looking for suggestions and constructive criticism.

    Anyone see any problems with this, or have suggestions?
     
  6. alec296

    alec296 i need another buick

    which poston pistons/cam? ihave used the hyperutectics and the 118 cam
    was not impressed .compression is about 9.2 with stock deck and 040 thick
    head gaskets
    also the carb your using is it a afb type carb,i suggest the Q-jet style carb
    i ran a carter afb and was having a problem with too rich in lower cruise and my exhaust would get so hot it would melt my taillight housing at the tailpipe exit.also i think you will need a 750 at least for what you are looking for
    your heads wont fit those valves(chevy) but ta valves are around 1.82/1.55
    i think would have to check that, you are going to need alittle over 9.5
    to get that hp goal,good flowing heads( i suggest jim burek at pae engines)
    headers with Xpipe 2 1/2 exhaust .good dist with proper advance recurve
    im tring something similar,mostly same parts but im goin with a lazers cam grind for a higher torque street motor not hp
    keep looking on this board for suggestions,oil modifications,other peoples combos that did or didnt work
    also am&p has a 350 build going on on this site that is in the range your looking for might want to check that out
     
  7. Buicks4Speed

    Buicks4Speed Advanced Member

    1.92 intake and 1.55 exhaust is about as big as you can go with out the valves touching unless you want to move the seats and guids apart. Way too much work involved in that. A 600 is way too small. Go with a 750 or 850 with annular boosters and a 1" spacer. 400 HP?? You'll need the heads ported if you want to even get close without race gas.
     
  8. Hector

    Hector '79 Buick Limited

    Those are sizes for mods on a sbc head,as mentioned here, the sizes when modifying sbb heads are smaller.The Buick engine needs a complete different aproach than the chevy,do some searches here and most mods will come up to achieve certain levels of performance.The main group of Buick performance vendors know their stuff also and seem willing to help with all questions,at least,that's been my experience.
     
  9. Buicks4Speed

    Buicks4Speed Advanced Member

    AN update... I am pretty happy with this as a final number. It is hard to ask for more out of a 1.92/1.55 valve and iron head without getting into a lot of epoxy...
    int/ exh
    .100 - 65 66
    .200 -122 114
    .300 -180 150
    .400 -236 179
    .500 -260 191
    .600 -264 199
     
  10. 70aqua_custom

    70aqua_custom Well-Known Member

    great numbers Rick. Too bad those heads are not bolted to my 350 :Do No:
    Are you planning to use these with air pressure somewhat above atmoshperic?
     
  11. Buicks4Speed

    Buicks4Speed Advanced Member


    They will eventually see some added atmosphere to them. They may get the "Squeeze" first, then some boost. We'll see. We are busy getting the race car ready for BG and I have been trying to get my motor squared away.
     
  12. Mart

    Mart Gold level member

    Re: Exhaust ports before and after...so far....

    Porting looks great! In the process of the same on 71 350 heads,Did you leave the intake floors slightly rough? If not, what finish did you end up with? Grinding stone finish or 36 to 60 grit paper finish? I understand the intakes are supposed to tumble the air/fuel mix.

    Mart
     
  13. sean Buick 76

    sean Buick 76 Buick Nut


    Probly make 600 hp with 6 psi!
     
  14. TXGS

    TXGS Paint by numbers 70 GS 455 4spd

    Pretty good numbers Rick!
     
  15. bad-buford

    bad-buford Well-Known Member

    Keeping the topic going.
     
  16. Dan Jones

    Dan Jones Well-Known Member

    > As far as iron heads go, you will be hard pressed to find ANY small block
    > iron head other a Buick 350 that can be ported to flow the numbers they can.

    Nice work on those heads but a stock, unported, Ford 351C-4V
    small block head will outflow a max ported Buick 350 head.
    A friend's heads flowed 292 CFM with stock single angle valve
    job. With only short side radius work, our last set was at
    322 CFM at 0.6" lift. A full port job can go a fair bit higher
    than that.

    Dan Jones
     
  17. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    what about them chevy vortec heads, everyone always boasts about those..
     
  18. Buicks4Speed

    Buicks4Speed Advanced Member

    Re: Exhaust ports before and after...so far....

    Just hit it with a stone along the floor once you are done. Sanding rolls/barrles work but don't last long and wear out too fast. They are ok for aluminum.

    As far as iron heads, I meant to refer to factory iron. They make 230 Dart iron heads that flow close to 290 out of the box......

    Those factory 4v heads you don't see many use, they are HUGE and don't flow that great for there size. Great for nitrous if you have enough cu in.
     
  19. Dan Jones

    Dan Jones Well-Known Member

    > Those factory 4v heads you don't see many use, they are HUGE and don't
    > flow that great for there size. Great for nitrous if you have enough cu in.

    Lots of 351C-4V's in use. I see more of them that I do Buick 350's.
    They were standard issue in Mustangs and Torinos not to mention Panteras.
    The magazines will tell you they don't work well on the street but they
    haven't a clue. They work just fine when the combination is put together
    properly. I have an 8:1 compression mild 351C-4V that'll pull 5th gear
    just fine from 1000 RPM. The quench chamber versions work even better
    and will allow 11:1 compression on pump gas. And when you add cubes or
    RPM, they are fantastic heads. Contrary to what the magazines say, the
    large valves flow very well at low and moderate lifts (and keep on flowing
    past 0.650" lift) and the canted valves help unshroud the valves while
    permiting a larger size in the same bore (4V's are 2.19" intake and 1.71"
    exhaust).

    Dan Jones
     
  20. leo455

    leo455 LAB MAN

    I was always told by Ford people that the 351 c motor was a medium duty motor not a true small block. Windsor are small blocks. I have always liked the 351-c and the head of choice was the 351`-c 2-v head. Better volicity. Those huge ports on those and the scj429 where to big for the cid.
     

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