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  1. #1
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    Default highest horsepower out of 455

    I am wonder what is the highest horsepower that anyone has seen/ produced in a 455 buick. I am curious to see what can be done.

    Tim
    1971 Buick Sportwagon 350/4
    2013 Ford Focus ST. factory pro-touring car. " Pugsley"
    2008 Harley Fatboy 96ci

  2. #2
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    My engine builder, Scotty Guadagno of PeeGee Performance, built the most powerful Buick V-8 so far.....950 HP! This was back in the mid-90s with a set of T/A Stage IV heads, dual 1050s on a sheet metal tunnel ram, and around 505 CI. He still holds the title of "World's Fastest V-8 Buick", having run 7.68@176 mph in 1996 in his ProStock-style '92 Regal. He is bringing his car out to the BPG Buick Nats in August, which will be the first time he's had it out (Buick powered) since the late '90s. He'll be running it with a T/A intake and single Dominator this time. He ran the car as a ProMod for a few years with a BBC motor with EFI and nitrous, and ran 6.96@205.
    Last edited by stagetwo65; 06-24-2004 at 08:49 PM.
    Doug Hecker
    65 Gransport - 8.74@152.61

  3. #3
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    Windsor, Ontario, Canada
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    Default

    Only 950 horsepower. I thought I read he was topping 1000 somewhere. Anyways pretty good, plenty more where that came from with the new block.
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  4. #4
    Join Date
    Jan 2004
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    76

    Default power

    Im not sure if you are talking about natural, or power enhancers, but the time slip section has that blown skyhawk at 172 plus at 8.0s , so that has to be atleast 1050hp or so at 2900 lbs.Would be curious to see if he has dynoed it.

  5. #5
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    Default

    Eather NA or enhanced. I have seen that there is a 900+ hp V-6 GN. but I an looking at the 455

    Tim
    1971 Buick Sportwagon 350/4
    2013 Ford Focus ST. factory pro-touring car. " Pugsley"
    2008 Harley Fatboy 96ci

  6. #6
    Join Date
    Jun 2003
    Location
    Joliet, IL
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    1,395

    Default Re: power

    Tom Haeffner said:Im not sure if you are talking about natural, or power enhancers, but the time slip section has that blown skyhawk at 172 plus at 8.0s , so that has to be atleast 1050hp or so at 2900 lbs.Would be curious to see if he has dynoed it.
    If your talking about Rod Hendrick's (sp) Skyhawk at the Chicago Chapter dyno meet he did a part throttle run and shut the dyno down when it pegged something like 850 hp. I unfortunatly went home and missed it, but heard it was quite a show. LOL
    Mike Prybell
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  7. #7
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    Feb 2002
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    Default

    Gr8ScatFan said:Only 950 horsepower. I thought I read he was topping 1000 somewhere.
    Actually, Scotty's dyno was always on the conservative side. The Moroso power-speed calculator says that it would take 1000 HP for a 2400 lb car to go 176 mph in a 1/4 mile. I think it's safe to say that Scotty made 1000 HP. On the subject of the aforementioned motor, I just happened to see that particular shortblock at Pat Musi's tonight, when I went down there to drop off a fuel pump to Scotty for his Regal. He had lent it to a friend of his to go street racing with a few years ago, and he called him last night to get it back to he can freshen it up, put the StageIV heads on it and the big roller cam back in it. His buddy was running it with a smaller cam and Stage2 SE heads. Scotty said he's dropping the Regal off at the body shop to get it re-painted this weekend so it'll look sweet at Salem. The beast will be running soon! It'll be cool to see that thing fly down the track again.

    Regarding Rod's blown, alcohol-injected moter....I believe Rod told me that when he had it dyno'ed, it tore up the dyno in some way. I don't remember if he broke it or what.
    Doug Hecker
    65 Gransport - 8.74@152.61

  8. #8
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    Nov 2003
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    Default

    I dunno about buick 455's, but I have heard that Jim Burek(I think) is making a 573 CI Buick engine(with it's own block, etc.), that should be making around 1,200 horses, and if that's the case, when it's done, would be the biggest buick V8.(correct me if im wrong on anything up there.)

    Note this:Chevy has a 572 crate motor that makes 720 HP, buick has one more CI and is making a-lot more HP and torque than that. That explains everything!!!!!!!!!!

    -Cody

  9. #9
    Join Date
    Mar 2004
    Location
    Iowa City, Iowa
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    96

    Default

    Buicks are known for their low end grunt, and im no expert here but i think that when it comes to factory engines we can be proud as buick owners to have the king "510" ft lbs. After market motors compete for the highest HP, but isnt the technology based on the factory engineering. I for one believe that buick did an outstanding job with their head designs and those specs are still good technology today. Yes the block design has flaws that are still being worked out, but lets think about how much R@D has gone into the Chevys and Fords. I think that sums it up right there. Not mant people build buicks, but the people who do get to go fast with class. T-

  10. #10
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    Feb 2002
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    MI
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    Default

    The future of big horsepower in a Buick once the block is done won't be the block it will be the heads. If the heads cannot support the cubic inches it won't matter how big the block is. This is just a factor that super flow gives to calculate horsepower. It seems to come out low but I will give it to you anyway.

    Hp = .27*(corrected flow)*(25/test pressure)

    .27*400*.892=96.33*8=770.68hp

    That number seems low for a 400 cfm head but I have also heard that if you multiply the peak by 2.2 that will get you close and that makes 880 hp which is still a long way from 1200 hp. We built a 464 and ran it then built a 494 with the same heads and intake and cam it only made and extra 15 horse power but it pick up about 60 foot pounds. I don't mean to burst any bubbles but once we have a block then we will need heads that will flow better than 400 cfm or it will be a waste of time to build a big motor to make huge power. You will be able to make a dependable motor with big inches but airflow is the key to HP.

  11. #11
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    Default

    The demand for high HP is in high demand right now, so as time goes on, I guess will will see what is done as far as the buick market goes. Heads are a, or should I say, *the* Key factor in flow, so one of these days, us buick guys/gals will have something to work with!

    I guess if ford is making some major HP with a 281, Maybe someone will do something for us 231 lovers That would be awesome

    -Cody

  12. #12
    buickboy71 Guest

    Default

    Rumor has it that a new billet head is also being created. Supposed to have some big flow numbers!

  13. #13
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    Default

    I do agree power adders are the way to get past the flow issue. I had that in the original but rewrote a portion of the post do to the fact I found my super flow book I have at work. I did not have the formula so I was not going to try and remember it so when I found it I changed a good portion of the post my apologizes

  14. #14
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    Default

    Bobb Makley said:The future of big horsepower in a Buick once the block is done won't be the block it will be the heads. If the heads cannot support the cubic inches it won't matter how big the block is.
    As we all know, TA has a selection of heads. Stage I and II have been the most popular, but I know they have additional offerings- Stage III for sure, and I think that the TA wagon used some Stage IV.

    Also, if I remember correctly, about 5-6 years ago I think that Mike once told me about some stage V and VI heads- I don't remember whether those were in the design phase or he had actual prototypes, but suffice it to say that I feel comfortable that there will be heads available for much higher of airflow than are commonly used now, if the demand is there.

    Personally, I'm a fan of power adders- I'd love to see a twin turbo setup pushing 25 PSI into a 5-hundred something inch motor. The V6 guys do that pretty frequently now, the same basic ideas (with some tweaking of course) will make the technology available for a big block. Of course the exhaust side is a lot harder to boost.

    FWIW, since I already have FI on my 455, turbocharging wouldn't be a big stretch for me. I have already looked into a twin-turbo setup- I was given a price by one of the best-known Turbo-6 engine builders of around $6,000, including custom intercoolers and custom headers. But since I already have nitrous, I decided to stick with that as my power booster (unless I happen to get a spare $6,000).

    -Bob Cunningham
    1969 Buick Special 4-door, 455 w/ EFI

  15. #15
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    Aug 2003
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    Windsor, Ontario, Canada
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    Default

    The TA Wagon used Stage V heads as it says on the buildup for it on the website. The link is http://www.taperformance.com/tawagon.htm

    As for the Stage VI heads, I think I read that there was castings or prototypes for them on this board, and they were to be some sort of Pro Stock style head. We need a Buick in the Pro Stock field, Anderson needs to be taken down, either way GO GM!
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  16. #16
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    Default

    http://www.v8buick.com/showthread.ph...Cylinder+Heads

    Read down to the post by Buick Power. Just what we need to be attached onto a new 572 inch block. We'll be running sevens all day.
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  17. #17
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    Default

    And since we're on Scottys car...anyone got pictures?
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  18. #18
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    Default

    I'm using a computer dyno calculator and I'm entering a few numbers into it. Sure, its not as good as Scotty's dyno, but it could give a good indication. I have heard several different weights for the car and several horsepower levels. I'll use a few different numbers.

    Horsepower=1000 Weight=2400 E.T.=8.2 MPH=164.3
    Horsepower=1000 Weight=2000 E.T.=7.71 MPH=174.6
    Horsepower=1200 Weight=2400 E.T.=7.71 MPH=174.6
    Horsepower=1250 Weight=2400 E.T.=7.61 MPH=177
    Horsepower=1100 Weight=2000 E.T.=7.59 MPH=177.4

    Please come to your own conclusions.
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  19. #19
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    Then by calculating the horsepower from weight & MPH, you get numbers like this:

    Weight=2400 MPH=176 Horsepower=1228
    Weight=2000 MPH=176 Horsepower=1024
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  20. #20
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    Default

    He'll be running it with a T/A intake and single Dominator this time. [/QUOTE]

    Also, I read in a GSXtra that he ran an 8.01 with a single carb setup. Everyone to Salem, you're in for the best Buick race in the world if all the big dogs are going to be there.
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  21. #21
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    Dec 2002
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    Kingwood TX
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    Default

    Not to bash any of you people's calculations but there is more to getting a car to run a good et besides horsepower to weight ratios. Efficiency of the coverter, if there is one, proper gear, right cam, the cars stream line coefficient, total rotational weight, elivation, the engine tuner, torque curve, and other factors come into account. A local here in my town has a 442 SBC powered 1950 lbs Camero that has run a best of 7.48 at 183. He only put 792 down on the rear wheel dyno. (Estimated 1000 on the motor) Put that in your calculations and see what you come up with. Granted he has had the same combo for 2 years but I feel that is still good.

    Blair
    1972 X275 Buick Skylark Convertible (BUICK SPECIAL OLYMPICS)

  22. #22
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    Default

    I just want to mension that the head work that can be done makes it possible to build allot of power. Some have already said this. It isn't cheep to build a Buick motor, but if we wanted the cheepest way to make power we would drive Chevies. Nuf said.
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  23. #23
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    Weight=1950 MPH=183 Horsepower=1122

    Seems like a pretty good car, and with a small block too, even if it is a Chevy.
    Steve Homick
    85 Regal-Father/Son 455 Project
    BPG # 1697

  24. #24
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    Default

    Blair, that's why I will never put my car on a chassis dyno again. Back when I was running 9.50s with a 481" motor in my car (750 hp on the engine dyno), I had it figured that I was losing almost 100 hp in my driveline. I used the Moroso power/Speed calculator with the car's weight (3000 lbs), mph thru the quarter (141), etc. It said that those numbers would require 650 hp at the rear wheels. Even though 100 hp is a lot to be losing, I've heard of much worse, so I didn't sweat it too much. I just started fooling around with stuff to improve it. (Swapped out the T-400 for a 'Glide, better convertor, correct gearing, etc.) Eventually, I got it to where I'm losing about 45 hp thru the driveline now. Not bad. Anyway, sorry I got off the track. My original point regarding the chassis dyno is this.....When I let my buddy talk me into running it on his, it claimed I had 500 rear wheel hp! RIDICULOUS!! It couldn't have even been close to that low. I would reckon your buddy's car has way more hp than that chassis dyno said it did. My humble opinion is that the engine dyno numbers(minus driveline hp loss, of course) are much more accurate. Might be a different story with a clutch car, I guess. Take care, Doug.
    Doug Hecker
    65 Gransport - 8.74@152.61

  25. #25
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    Kingwood TX
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    Default

    Yah, keep in mind you are going to lose about 20-25% of power through the drivetrain. That is with converter cars, a clutch car can be much less, around 8-15% power loss. (I saw one really bad combo that lost 30% to the rear wheels) That guys car made 847 on the dyno with out the spray and they spray a 150 shot on it. Don't get the idea that there are a bunch of fast cars in my area, becuase there aren't. Most guys bracket race, since they can't tune their way out of a paper bag, but can maintain running a slow et.

    Blair
    1972 X275 Buick Skylark Convertible (BUICK SPECIAL OLYMPICS)

 

 
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