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  1. #1
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    Sep 2006
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    Default Buick 350 convert. to a 383 stroker?

    So here's the question: Can you have the Buick 350 bored, and the pistons cupped to turn it into a 383 stroker the same as you would a chevy 350? And if not, why?

    It's been bouncing around in my head the last couple months to turn my little 350-2 into a beast. I'm not willing to remove it and drop in a 455, because I want people to know what they've been stomped by. But I havent found any mention, or reference to a Buick 383 stroker. So I'm left to wonder.. will the crank and rods out of a 400 not fit? Does cupping the piston sleeves ruin the block? And so forth...

    I believe I've asked before, but never received a straight forward answer and I cant seem to find the thread. Any help would be appreciated.
    Richard Herrmann

    B.C.C. Total Performance
    550 Cesar E. Chavez
    Pontiac, MI 48342
    Welding & Fabrication, Autobody repair & paint, OE Repair & Aftermarket performance

  2. #2
    Join Date
    Oct 2004
    Location
    PGH,PA, USA
    Posts
    4,705

    Default Re: Buick 350 convert. to a 383 stroker?

    the 350 is pretty much maxed out for stroking..you might be able to offset grind the crank... but you wont get a 383 out of it...you can definatly bore it out though, ta perfromance and poston has all the performance goodies for your 350, and if you want forced induction you can either follow the twintub thread and get an idea for a custom turbo setup or you may head over to xsperformance.net and getyourself a supercharger kit.
    Mike aka BiZnO
    72 twinturbo Skylark

    Buick 350 Inspirational members to me..
    TuBBeD for his 551+ N/A build
    BillMah52 First to take a 350 where no man has gone before
    Justa350 First to hang a pair of turbos and cause Kaos
    GSJohnny First to max out the bore at .090 and his .075 and have engines that actually breath well N/A!
    Bobb Makley First well known to Stroke a 350
    Ken Betts, Hopefully the guy to pull-off 350 AL heads :-D

  3. #3
    Join Date
    Sep 2006
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    Pontiac, MI
    Posts
    836

    Default Re: Buick 350 convert. to a 383 stroker?

    That's what I needed to know. Now to hit the parts lists.
    Thanks!
    Richard Herrmann

    B.C.C. Total Performance
    550 Cesar E. Chavez
    Pontiac, MI 48342
    Welding & Fabrication, Autobody repair & paint, OE Repair & Aftermarket performance

  4. #4
    Join Date
    Feb 2002
    Location
    Upstate NY 13901
    Posts
    5,820

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by Nothingface5384 View Post
    the 350 is pretty much maxed out for stroking..you might be able to offset grind the crank.
    Offset grinding is stroking.

    The Buick 350" is maxed out for stroke(for all practical applications). Even aftermarket rods have proven to be a challenge to not hit the cam, without the right clearance. The 3.85" stroke is bigger than some big blocks.

    Put your effort into the proper 'Buick' clearances, proper cam selection to match the heads, etc. The 350 Buick heads can be ported to flow better than just about any other iron small block head out there. Whoever does the heads needs to know that the stem height/tip height needs to be properly set. This isn't a small block Chevy!!

    Best way to make more power will be with boost.
    Last edited by GSXMEN; 02-05-2007 at 06:10 PM.
    Scott B.


    72 GS 455 Stage 1, 70 Skylark, 92 Roadmaster

    Acts 4:12 - Salvation is found in no one else, for there is no other name under heaven given to men by which we must be saved.

  5. #5
    Join Date
    May 2002
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    Fayetteville,N.C.
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    1,308

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by WickedWay View Post
    So here's the question: Can you have the Buick 350 bored, and the pistons cupped to turn it into a 383 stroker the same as you would a chevy 350? And if not, why?

    It's been bouncing around in my head the last couple months to turn my little 350-2 into a beast. I'm not willing to remove it and drop in a 455, because I want people to know what they've been stomped by. But I havent found any mention, or reference to a Buick 383 stroker. So I'm left to wonder.. will the crank and rods out of a 400 not fit? Does cupping the piston sleeves ruin the block? And so forth...

    I believe I've asked before, but never received a straight forward answer and I cant seem to find the thread. Any help would be appreciated.

    If you can get a aftermarket crank, then you can run Honda bearing and run a 4.00 stroke with a 1.88 or 1.85 bearing. You would do this by getting a set of Yates style rods from a Nascar setup. I got a set of Billet 6.400 rods that use a Honda bearing and are .937 wide. This would give you a 371 cu.in. with a .040 over. That would be about the best you can do for cubes. I don't think there are any blocks that will safely take .060 over and even that is only a 375.
    Nitrous is just a "poor-man's blower" on a payment plan.
    Rick Crawford
    72 GS w/Nitrous'd 466
    8.96 @133
    5.50 @129.5 1/8mi, 1.36 60ft
    2009 Pontiac G8 GT 10.87 @127 full street trim, 285/40-18 drag radials

  6. #6
    Join Date
    May 2003
    Location
    I-95, Old exit #69 ;]
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    5,333

    Default Re: Buick 350 convert. to a 383 stroker?

    you get a 383 stroker by putting a 400 small block Chevy crank in a 350 SBC block.

    there IS NO 400 small block Buick. the 400 ( and the 401 Nailhead for that matter ) has a 4.75" bore center ( along with the other two BBB's, the 430 and 455 ) while all of the SBB's ( 215,300,340,350 ) have a 4.24" bore center.

    needless to say, aside from the cam-to-crank clearance issue you'd never even get a BBB crank into the 350 block in the first place. physically unpossible.

    on the plus side, if you're willing to spend the dough it might be possible to resleeve the Buick 350 with 4" bores and that would give you 387.04ci on the stock stroke.

  7. #7
    Join Date
    Feb 2002
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    Upstate NY 13901
    Posts
    5,820

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by bobkmando View Post

    on the plus side, if you're willing to spend the dough it might be possible to resleeve the Buick 350 with 4" bores and that would give you 387.04ci on the stock stroke.

    I believe Bill M. ran that idea past his engine builder. Just not enough room I think he said.

    Since the LS1 and 318" have 3.9xx" bore sizes - I wonder if that might be an option. Sure seems like it would unshroud the valves nicely, and improve the already decent fully ported heads' airflow.
    Scott B.


    72 GS 455 Stage 1, 70 Skylark, 92 Roadmaster

    Acts 4:12 - Salvation is found in no one else, for there is no other name under heaven given to men by which we must be saved.

  8. #8
    Join Date
    Jan 2007
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    TOLEDO OH
    Posts
    549

    Default Re: Buick 350 convert. to a 383 stroker?

    YOU GUYS ARE CRAZY!!!!! I LUV IT!!!!!

  9. #9
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    13,481

    Default Re: Buick 350 convert. to a 383 stroker?

    Don't try to boer over 40 thou or stoke at all, spend the $ on head porting.
    __________________________________________________ ________________________________________
    My book called Small Block Buick Performance covering the V6, 215, 300, 340, and Buick 350 engines will be released soon.

    http://www.v8buick.com/forumdisplay....rformance-Book
    __________________________________________________ __________________________________________________ _________________________________
    1970 Buick Skylark 350 street/strip with 6 point cage: Custom tube headers feed Twin T3/T4 Turbochargers, Holley 650, sheet metal single plane intake, heavily ported iron heads with oversized valves, mild Poston 114 camshaft (2800-6000 RPM), Diamond forged pistons on Hershe forged rods, balanced, ARP everywhere, dual 3" exhaust, Paddle shifted 4L80E 4 speed overdrive, Moser 12 bolt with 3.42 gear.

  10. #10
    Join Date
    May 2002
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    Fayetteville,N.C.
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    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by sean Buick 76 View Post
    Don't try to boer over 40 thou or stoke at all, spend the $ on head porting.
    ABSOLUTELY! ! !
    Nitrous is just a "poor-man's blower" on a payment plan.
    Rick Crawford
    72 GS w/Nitrous'd 466
    8.96 @133
    5.50 @129.5 1/8mi, 1.36 60ft
    2009 Pontiac G8 GT 10.87 @127 full street trim, 285/40-18 drag radials

  11. #11
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    May 2003
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    Mobile,Ala.
    Posts
    1,772

    Default Re: Buick 350 convert. to a 383 stroker?

    I have a stock bore 350 in a 3800lb Skylark that has run 11.92 (all motor )
    A 383 would be nice but for what it would cost for the short block I would spend it on the heads . Just my 2 cents .


    Mike Williamson
    71 GSX Stage1
    67 GS 400

    BPG #1996

  12. #12

    Default Re: Buick 350 convert. to a 383 stroker?

    turbos
    two turbos
    Andy bridgeview,il
    65 special v6 daily driver-this needs to go faster
    82 gn clone 455 12.50's on pump, soon trishield 464
    84 gn
    72 skylark convert#2 ,N-25 for sale

  13. #13
    Join Date
    Sep 2005
    Location
    South Lake Tahoe, CA
    Posts
    1,498

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by Buicks4Speed View Post
    If you can get a aftermarket crank, then you can run Honda bearing and run a 4.00 stroke with a 1.88 or 1.85 bearing. You would do this by getting a set of Yates style rods from a Nascar setup. I got a set of Billet 6.400 rods that use a Honda bearing and are .937 wide. This would give you a 371 cu.in. with a .040 over. That would be about the best you can do for cubes. I don't think there are any blocks that will safely take .060 over and even that is only a 375.
    wrong... stroke it anymore and the rods will hit the cam... then KABOOM!

    '64 Riv

    '65 Special WAGON... turbo and EFI here I come
    http://www.v8buick.com/showthread.ph...ntake-and-more

  14. #14
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    May 2002
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    Fayetteville,N.C.
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    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by 87GN@Tahoe View Post
    wrong... stroke it anymore and the rods will hit the cam... then KABOOM!

    First, KB ran aluminum is his test motor that was published here so there is a little room. Second, the rod journal is not moving any closer to the cam. You are just getting stroke by making the existing rod journal smaller on the "inside" so the rods wont be any closer to the cam. They are close but an offset grind should have no problems fitting. The small journal would be a problem on a stock crank as strength would be an issue.

    So, no KABOOM. Agreed? Just a weak crank.
    Nitrous is just a "poor-man's blower" on a payment plan.
    Rick Crawford
    72 GS w/Nitrous'd 466
    8.96 @133
    5.50 @129.5 1/8mi, 1.36 60ft
    2009 Pontiac G8 GT 10.87 @127 full street trim, 285/40-18 drag radials

  15. #15
    Join Date
    May 2003
    Location
    Mobile,Ala.
    Posts
    1,772

    Default Re: Buick 350 convert. to a 383 stroker?

    I like my 455 and 350 but with all that I am hearing about the possibilities of stroking a 350 makes me want to look deeper into it . I have some very personal vendetas around here and would love to post a kill story about my little 350 . Please keep the info coming .


    Mike Williamson
    71 GSX Stage1
    67 GS 400

    BPG #1996

  16. #16

    Default Re: Buick 350 convert. to a 383 stroker?

    someone make it a reality and then make kits available.
    then the alum heads and killer intake will be next
    Andy bridgeview,il
    65 special v6 daily driver-this needs to go faster
    82 gn clone 455 12.50's on pump, soon trishield 464
    84 gn
    72 skylark convert#2 ,N-25 for sale

  17. #17
    Join Date
    May 2003
    Location
    Mobile,Ala.
    Posts
    1,772

    Default Re: Buick 350 convert. to a 383 stroker?

    Somebody make the parts , I volunteer to be the test guinea pig . By buying the parts , building the motor and having ALL the fun of running the h--l out of it . Lets hear more from the ones in the know about how to make it .


    Mike Williamson
    71 GSX Stage1
    67 GS 400

    BPG #1996

  18. #18

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by SS-TRUCK View Post
    I have a stock bore 350 in a 3800lb Skylark that has run 11.92 (all motor )
    Wow, 11.92 without a power adder from a 350 is incredible! I'm guessing you've spent many an hour on the heads! Please, please tell us more!

    There is an interesting thread over on the buickperformance board about cutting Mopar single plane intakes into four sections and making them work on the 350 block with adapter plates. It's been tested and does work but there hasn't been any companies interested in producing them as of yet.
    Ken McMillan
    68/69 Stepchild Nation
    '69 GS California 350 - 13.56 @99.4
    '69 GS Convertible current resto project
    '68 Harley Sprint SS

  19. #19
    Join Date
    May 2003
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    I-95, Old exit #69 ;]
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    Default Re: Buick 350 convert. to a 383 stroker?

    There is an interesting thread over on the buickperformance board about cutting Mopar single plane intakes into four sections and making them work on the 350 block with adapter plates.

    WTF???

    linky please?

  20. #20
    Join Date
    Jun 2004
    Location
    ontario, canada
    Posts
    172

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by gscalifornia View Post
    Wow, 11.92 without a power adder from a 350 is incredible! I'm guessing you've spent many an hour on the heads! Please, please tell us more!

    There is an interesting thread over on the buickperformance board about cutting Mopar single plane intakes into four sections and making them work on the 350 block with adapter plates. It's been tested and does work but there hasn't been any companies interested in producing them as of yet.
    Please? Will you tell us how? 11.92 ? 3800? sbb?
    Yeroon Van Leeuwen
    1969 Skylark - 5.3 Engine/th400.

  21. #21
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    Feb 2002
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    Cedar Rapids, IA
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    1,700

    Default Re: Buick 350 convert. to a 383 stroker?

    Quote Originally Posted by Rizzle View Post
    Please? Will you tell us how? 11.92 ? 3800? sbb?
    Where did you guys see 3800@11.92 ....... if it was Johns car, I think he is quite a bit lighter than that. I'd love to have my hulk do that...... but I am just happy to keep it doing 13's and not breaking.

  22. #22
    Join Date
    Dec 2005
    Location
    Minnesota
    Posts
    400

    Default Re: Buick 350 convert. to a 383 stroker?

    I'm with BOB! LINK please.
    Nic '73 Vega GT Aluminum Wildcat 355
    http://www.cardomain.com/ride/2357894

  23. #23
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    May 2002
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    Fayetteville,N.C.
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    Default Intake

    Nitrous is just a "poor-man's blower" on a payment plan.
    Rick Crawford
    72 GS w/Nitrous'd 466
    8.96 @133
    5.50 @129.5 1/8mi, 1.36 60ft
    2009 Pontiac G8 GT 10.87 @127 full street trim, 285/40-18 drag radials

  24. #24
    Join Date
    May 2003
    Location
    Mobile,Ala.
    Posts
    1,772

    Default Re: Buick 350 convert. to a 383 stroker?

    There is no link to the 11.92 run . Its my car , sitting in storage until I get over back surgery . The motor is 350 stock bore with full flat top pistons . cap screw rods , heads are cleaned up and angle milled with a good 5 angle valve job ,Poston cam and intake , 800 cfm Qjet very reworked , 2 1/2 mandrel bent exhaust , 3000 converter and 4.10 rear gear .


    Mike Williamson
    71 GSX Stage1
    67 GS 400

    BPG #1996

  25. #25
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    337

    Default Re: Buick 350 convert. to a 383 stroker?

    The good old 74 apollo went 11.66 at Indy this fall. 750QJ carb. Stock intake with stock trw 10.25 pistons. Car weighed 3620. Yip. its real.

 

 
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