Information on porting cylinder heads

Discussion in 'Race 400/430/455' started by gmcgruther, Oct 3, 2014.

  1. gsjohnny1

    gsjohnny1 Well-Known Member


    jim,
    i run 100psi for the s/charged 350 with no problems using the oem pump.
    john
     
  2. gmcgruther

    gmcgruther Well-Known Member

    I think its funny when I see post about me not being able to make 750 hp range on cast heads! To those that hasn't experimented with cast cyl. heads- its called cut and weld people, or should I say old school of thinking! I have see cyl. heads that flowed jack crap and the owner did a little old school tech work and achieve the impossible ;) Now that being said, I could take the easy road and have a set of billet heads done to my spec's and easily obtain it ;) but why? I have a imagination and like to use my brain to obtain a certain goal ! If I wanted 750+hp easy , I would've went with a single turbo and fuel injection from Moran racing engines and that would've been detuned or spray a N.O.S. Pro Dual stage Double cross-plate that is adjustable to 650 hp ;) , that's the simple way though. I like challenges more then the easy road, if I want easy, I'll stick with Chevy then ! Jim, I would love to talk about some serious power if you want to do a engine that is in the 494 to 528 range, something like 1500 - 2500 hp range ;) You build it and sell it if you like and all I do is consult with ya! Sincere Gary M.
     
  3. Jim Weise

    Jim Weise EFI/DIS 482

    Ya John, I have had some 455's run some serious pressure with the stock pump.. but typically not the loose race stuff.

    X factor in a 455 is cam tunnel size and lifter/bore clearance.

    JW
     
  4. gmcgruther

    gmcgruther Well-Known Member

    Jim, he needs a small base circle cam or should I say "use of a small base circle cam ;) " here is another thing, I either plan on running a AM&P OILoil pump scavenger system or a external petersen oil pump or if feeling not safe, a dry sump system. Gary M.
     
  5. pmuller9

    pmuller9 Well-Known Member

    Gary

    Any BBB cam with lobe lift much over .350" has to have the base circle reduced to fit through the cam tunnel.
    So small base circle cams are a given for high lift BBB lobe profiles.

    It doesn't take much base circle reduction before the cam core diameter has to be reduced to keep the lifter from rubbing on it.
    This makes for a cam that will have more twist and creates a bigger difference in cam timing from front to back.

    As the base circle is decreased the ramp rate increases for a given lobe profile which increases the forces or loading on the lifters.
    Add increased rocker ratios and the problem compounds and you have a very high stress valve train.

    That''s some of the reasons Pro Stock cam tunnels are about the same size as the the crank main line.
    It's also the reason when we order an aftermarket block we always take the larger cam tunnel option.

    We use a 3 stage Auto Verdi dry sump system.
    The 3 scavenger pumps pull 10 inches of vacuum on our engine (before full boost) so there is no need for a vacuum pump.
    What's also cool is, since I data log, if I see the vacuum taking a dive then I know the engine has a piston ring problem.

    Paul
     
    Last edited: Dec 5, 2014
  6. gmcgruther

    gmcgruther Well-Known Member

    Devon,
    I'm referring to not much changing in design in factory cylinder heads and in aftermarket cylinder heads too! The aftermarket cylinder heads haven't changed in how many years? While every single engine company has for the last 15 Years! Buick it self had several chances to do aluminum heads but, they lost that chance! Now, here is a thought that I know for one that works very well, Why hasn't anyone tried to make a SB 2.2 cylinder head design? Please don't say " because it don't look like a Buick!" because, if that's the case, don't use any aftermarket parts. They are not Buick at that point! The SB 2.2 cylinder head is one of the best cylinder head designs of today and that is relatively old now too! Just think about that for a while and even research it. Sincere Gary M.
     
  7. gmcgruther

    gmcgruther Well-Known Member

    Derek, Have you heard of a engine diaper? They keep a lot of oil and parts off the track or where ever the engine lets go! This engine I'm doing will have several safety shut off switches to make sure I don't do something really stupid! I do know the engine will eventually go boom, its not about where it will pop but, when? The engine will be used in NO ET grudge events. Also this engine in car will have full exhaust out to the bumper. The car I want must be a total sleeper! Derek, I will slowly add boost or Nitrous (depending which one I go with) as I go. I do want to test and document my progression. All this will be done on a BigStuff3. Sincere Gary M.
     
  8. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    I've never understood the sleeper tag on cars that have exhaust notes that rival a 747 on take off and shake the car at idle :puzzled: And the intake and headers needed to support the head's increased flow will be anything but sleeper'ish..... I guess that is my opinion on that.

    People call my car a sleeper, but it's not going to sneak up on anyone at a light unless their car is louder than mine!
     
  9. gmcgruther

    gmcgruther Well-Known Member

    Jim W., Here is my list of parts, I'm getting. Custom Billet pistons from Moran Racing Engines, GRP aluminum rods, a pair of GM cast iron cylinder heads that is gonna be a work of art of old school, one off Marcella's Manifold non sheet metal intake, Pro-Systems carburetor, Custom ground solid roller cam, engine block girdle and main girdle, lifter valley epoxied and girdle, Engine halve bloc filled, and a bunch more goodies. Yes, this engine can be done much cheaper but, I'm gonna prove a point here ok. I don't like people doubting me, so I go over bore and show what I'm capable of! Jim, I don't mean no disrespect to you but, When I saw your build of the Triple Nickle (555), I was wondering what you did wrong and I called Steve Morrison of Morrison Racing Engines (last years DragWeek champion engine builder), he can only think that your cam was your weak link! That engine had all the right parts to go beyond 1500hp on boost! Sincere Gary M.
     
  10. gmcgruther

    gmcgruther Well-Known Member

    So true to the point, but there is a video in facebook that a father and son took a 1977-78 Buick le sabra and put a LS engine in it with full exhaust and at the track nobody thought of it being fast because of it not being loud:laugh:, that car weighs 4200 lbs and on the nitrous it went mid 9's and the crowd about craped there pants and the second time around it did a motor pass of mid 10's yanking the rt tire off the ground. needless to say, it show's that being a heavy car doesn't mean your slow any more especially when its muffled good:Brow::laugh:. Sincere Gary M.
     
  11. gmcgruther

    gmcgruther Well-Known Member

    [​IMG][/URL][/IMG] , [​IMG][/URL][/IMG] , [​IMG][/URL][/IMG] , [​IMG][/URL][/IMG] , by studying these pictures I see where it needs improving. Sincere Gary M.
     
  12. hugger

    hugger Well-Known Member

    Im all for traveling the road less traveled , but working with iron is gonna be a challenge . All I can say is Idk exactly how much power Moussud,Chilenski, and Montour's my apologies as im sure I butchered their names, but anyways their engines made over 700 and i venture to say the heads on those cars are were/some of the most over the top work, moral of the story is its been done
     
  13. Tom Haeffner

    Tom Haeffner Well-Known Member

    Hey Gary.Are you sure it ran a mid 10 at 4200 lbs with a ls motor without spray??I could see high 11's, but must be a heck of a pump gas ls engine to run mid 10's without spray.
     
  14. Smokey15

    Smokey15 So old that I use AARP bolts.

    You mean Steve Morris, Morris Race Engines (MRE) in Muskegon, MI. right?
     
  15. SubCool

    SubCool SubCooled

    going to need another can of cheese and possibly a bigger cracker..lol
     
  16. slimfromnz

    slimfromnz Kiwi Abroad

    Gary,
    For a guy that previously mentioned you are on disabilty and have a tribe of kids, I just cant see where you are going to get the money to fund this. I think we will be waiting a loooooong time for this to come to fruition. TA will have some badass heads and valvetrain readily available long before this one is ready.............

    I cant see the sincerety in your posts either!
     
  17. ceas350

    ceas350 "THE BURNER"

    Dude just needs thicker skin... can't start a thread asking for help then go on a rant because you get honest advise from experienced members. Just saying...
     
  18. gmcgruther

    gmcgruther Well-Known Member

    Hugger, your rt on Ron Chilenski's engine about his heads being damn near over the top! Now, the 528 by Kenne-Bell, nope just some simple porting! Here is my point though, a lot of poeple on here say I can't do it! Really ? Dang, hasn't anyone heard of slice and dice before? That's rt, cutting up cast heads and doing my own port shape then welding(brazing) it back together. I have done stuff like this and does take some time. I even plan on having someone weld up the combustion chamber so I can make my own and correct combustion chamber ! Anyone can look at the cross sectionak pictures I posted and see it is definitely not correct in anyway. Its up to the cylinder head guy to fix it. Sincere Gary M.
     
  19. gmcgruther

    gmcgruther Well-Known Member

    http://m.youtube.com/?#/watch?v=-iyhB3FjMHo here is the video, I was off on all times and engine. Its a Lt Series engine. just watch and listen carefully ok. needless to say, this car is no joke.
     
  20. gmcgruther

    gmcgruther Well-Known Member

    That's the thing, the ones that gave good honest imformation helped the others just said meanful things! Is it necessary ?
     

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