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  1. #76
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    Very cool story!
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  2. #77
    Join Date
    Mar 2003
    Location
    Roseville,MN.
    Posts
    124

    Default Re: 69' Banshee Build

    Love to hear how the old girl is doing, love to see and hear video even more.

    -Steve
    '69 GS400 (clone)
    '71 455 block
    '70 Riv heads
    Poston 284/304-490
    T/A sp1 intake or Iron stocker
    Poston headers
    Holly 800 double pumper
    TH400 modified
    Stock convertor
    3.36 12 bolt posi
    No heat,No blower motor,No ductwork.
    No A/C
    No wipers or wiper motor
    Manual steering
    Manual brakes
    No soundproofing
    No carpet
    No radio
    No speakers
    3410 lbs

  3. #78
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Car has been sleeping under a cover in the garage past couple of months. Weather hasn't been that great and the tranny likes to leave large puddles even after I have replaced all the external seals on it.

    Picked up a 200-4R tranny today from a local guy that already had it rebuilt to take some power. Stay tuned for installing that and I will get some smoky tire vids at that point. I'll try and have it all going by the end of the month.
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  4. #79
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    I look forward to seeing video for sure! The overdrive will be awesome!!!
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  5. #80
    Join Date
    Mar 2003
    Location
    Roseville,MN.
    Posts
    124

    Default Re: 69' Banshee Build

    Quote Originally Posted by tinker14bs View Post
    Car has been sleeping under a cover in the garage past couple of months. Weather hasn't been that great and the tranny likes to leave large puddles even after I have replaced all the external seals on it.

    Picked up a 200-4R tranny today from a local guy that already had it rebuilt to take some power. Stay tuned for installing that and I will get some smoky tire vids at that point. I'll try and have it all going by the end of the month.
    Looking forward to it.
    '69 GS400 (clone)
    '71 455 block
    '70 Riv heads
    Poston 284/304-490
    T/A sp1 intake or Iron stocker
    Poston headers
    Holly 800 double pumper
    TH400 modified
    Stock convertor
    3.36 12 bolt posi
    No heat,No blower motor,No ductwork.
    No A/C
    No wipers or wiper motor
    Manual steering
    Manual brakes
    No soundproofing
    No carpet
    No radio
    No speakers
    3410 lbs

  6. #81
    Join Date
    Nov 2011
    Location
    Rifton, NY
    Posts
    839

    Default Re: 69' Banshee Build

    If you need any 2004r advice I have one behind my SBB. Definitely makes the car a great cruiser with 3.73s
    Jacob
    72 Skylark with rebuilt Buick 355. 8.5:1 JE pistons. TA 1.60 roller rockers, roller cam and lifters.
    TA SP3 Intake converted to Holley HP MPFI with 66lb injectors
    Chevy 12 bolt 4.11 gears
    TA 1 5/8" headers
    Extreme Automatics Stage II 200-4r Extreme Automatics 2600rpm 9.5" converter
    Coil near plug ignition, GN cam sensor, 36-1 crank trigger.
    Front and rear disc brake conversion, Rear sway bar, boxed lower rear control arms
    17x8 and 17x9 Year one Magnum wheels. 285/40/17 rear tires.

  7. #82
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    I will probably take you up on that at some point. Unfortunately my nights and weekends are spoken for until mid May, so the tranny is going to have to wait. I might be able to get a paint job snuck in on it. Weather is getting nice down here though. I need to get it going soon.

    Quote Originally Posted by DauntlessSB92 View Post
    If you need any 2004r advice I have one behind my SBB. Definitely makes the car a great cruiser with 3.73s
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  8. #83
    Join Date
    Mar 2003
    Location
    Roseville,MN.
    Posts
    124

    Default Re: 69' Banshee Build

    Any updates?
    '69 GS400 (clone)
    '71 455 block
    '70 Riv heads
    Poston 284/304-490
    T/A sp1 intake or Iron stocker
    Poston headers
    Holly 800 double pumper
    TH400 modified
    Stock convertor
    3.36 12 bolt posi
    No heat,No blower motor,No ductwork.
    No A/C
    No wipers or wiper motor
    Manual steering
    Manual brakes
    No soundproofing
    No carpet
    No radio
    No speakers
    3410 lbs

  9. #84
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Quote Originally Posted by 69gs400 View Post
    Any updates?
    I got the second 2004r transmission working it in this past weekend. Upon a test drive tonight I realized the car is running real rich. I need to lean it down and bit and see if I can get a vid posted up. It was 80 and sunny today so I drove the car to work today. Bunch of guys wanted to come out to check it out. It gets a lot of attention where ever it goes still.
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  10. #85
    Join Date
    Mar 2003
    Location
    Roseville,MN.
    Posts
    124

    Default Re: 69' Banshee Build

    Quote Originally Posted by tinker14bs View Post
    I got the second 2004r transmission working it in this past weekend. Upon a test drive tonight I realized the car is running real rich. I need to lean it down and bit and see if I can get a vid posted up. It was 80 and sunny today so I drove the car to work today. Bunch of guys wanted to come out to check it out. It gets a lot of attention where ever it goes still.
    I bet it does, thanks for giving her a good home. Love to see video.

    -Steve
    '69 GS400 (clone)
    '71 455 block
    '70 Riv heads
    Poston 284/304-490
    T/A sp1 intake or Iron stocker
    Poston headers
    Holly 800 double pumper
    TH400 modified
    Stock convertor
    3.36 12 bolt posi
    No heat,No blower motor,No ductwork.
    No A/C
    No wipers or wiper motor
    Manual steering
    Manual brakes
    No soundproofing
    No carpet
    No radio
    No speakers
    3410 lbs

  11. #86
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    Quote Originally Posted by tinker14bs View Post
    I got the second 2004r transmission working it in this past weekend. Upon a test drive tonight I realized the car is running real rich. I need to lean it down and bit and see if I can get a vid posted up. It was 80 and sunny today so I drove the car to work today. Bunch of guys wanted to come out to check it out. It gets a lot of attention where ever it goes still.
    Keep in mind that your turbo setup will want a richer setup vs a NA engine.
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  12. #87
    Join Date
    Apr 2006
    Posts
    1,369

    Default Re: 69' Banshee Build

    Quote Originally Posted by sean Buick 76 View Post
    Keep in mind that your turbo setup will want a richer setup vs a NA engine.
    On low boost (8psi) I tuned for 12-12.5 afr. The guys that tune for 10 are using fuel to cool things down on high boost. As long as the engine doesn't ping NA or close to NA tune is okay. I picked up a ton of power going from 10.5 to 12.0. Tweaked it down to 12.5 and saw no notable improvement so I kept it 12-12.5. I did use 92 octane pump gas though. I originally ran 87, but pulled a lot more timing. With pump premium I ran 30-32 degrees total on 8psi with stock pistons. Never pinged.

  13. #88
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    Now that is some very useful first hand info that will help all of us Boosted Buick 350 guys!

    Here is the dyno graph of my car... We had to abort the run due to tire rub and a header leak but it still made 450 HP at the tires. Have a look at the air fuel ratio. Basically 12:1 the whole run:

    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  14. #89
    Join Date
    Dec 2006
    Location
    British Columbia, Canada
    Posts
    642

    Default Re: 69' Banshee Build

    Quote Originally Posted by sean Buick 76 View Post
    Now that is some very useful first hand info that will help all of us Boosted Buick 350 guys!

    Here is the dyno graph of my car... We had to abort the run due to tire rub and a header leak but it still made 450 HP at the tires. Have a look at the air fuel ratio. Basically 12:1 the whole run:

    How much Boost were you running on this dyno run?
    Buick #455

  15. #90
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    It was about 17 PSI, using both air to air intercooler and water meth injection. Bone stock CSU carb no mods to it, right out of the box. There were a few issues such as a converter that was slipping as it could not handle the power. Got a $1800 converter to swap in now.
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  16. #91
    Join Date
    Apr 2006
    Posts
    1,369

    Default Re: 69' Banshee Build

    Nice billiard table fuel curve! What was your total timing?

  17. #92
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    Quote Originally Posted by Justa350 View Post
    Nice billiard table fuel curve! What was your total timing?
    Total timing was 22 degrees, lots more left in the combo to be sure.
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  18. #93
    Join Date
    Jul 2007
    Location
    Greensboro, nc
    Posts
    4,340

    Default Re: 69' Banshee Build

    I shot for between 12 and 12.5 AFR. I ran a Mallory 6 box with boost and start retard..

    87 octane only. Setup was like this. 20* initial with 14* mechanical all in at 2K with a 2800 stall. 10* start retard. Map sensor pulling 1* for lb. of boost. Methanol came on with a full spray at 4 psi. Boost gauge said I was running 12PSI. Not sure how accurate that was. I used vacuum advance too.

    Jay
    Jay Davenport
    70 Skylark 455... Needs paint and interior
    72 GS 355.. Sold
    71 Skylark 355 Mark Burton Twin Turbo 7.67@ 92.1 W/2.01 60ft Ecoboosted SOLD

  19. #94
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Thanks for all the advice. I will be tuning this weekend. When I say it was running rich, it pinged my gauge at 10 at part throttle, it would creep up to 12 after a few thousand RPM. I can't recall off the top of my head what I am running for timing. I will check it this weekend as well. I am running the MSD 6BTM box and am pulling 1 per 1psi. I have some 11lb springs and a meth injection kit I want to install, but want to get it tuned at this combo first. Then I can see if I want to try more. Stock pistons, early rods, stock bore and when I re-ringed the engine I never checked gap on rings, I installed them out of the box (I was 16 at the time and had never heard of setting gap on a ring. Plus I never had dreamed of turboing the car 12 years later either). Does have upgraded springs.

    This car was my first car when I turned 16. I crashed it two weeks after I had it racing my buddy in his 75 Blazer. 4 wheel drum manual brakes and the car could barely stop above 40mph. We were side x side on a back road coming into a speed limit area. Tow truck pulled onto road what seemed like a ton of distance in front of us, but my car could not stop, slide it sideways and hit the safety bar into my passenger fender and bent the hood. I did get a GS hood for the car out of it though! My buddy sold that Blazer when we were 18. He called me tonight all excited saying he bought it back from the guy he sold it to. Told it was time we get them lined back up again.
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  20. #95
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Had a little extra time to work on the car this weekend. I pulled the valve body plate on the 2004r and made the 1-2 shift hole smaller. I was getting tire chirp with barely any throttle that I did not want. I went from 0.096 to 0.085 on the hole and put it back together. 1-2 shift was much better. Firm, but not chirping the tires at part throttle.

    I also was working on the PVRC jets. I was running 0.045 and went to 0.041. At cruise I have 14-15 inHg. AFR at 13.5. PV of 10.5. When I would give enough throttle to open PV, AFR would be ~12.2. With the 0.045 PVRC jets it would be bogged at AFR 10. Slowly rolling into throttle at 12 inHg the AFR creeps up to 14, but no pinging. Does that seem normal? Seems like a PV of 12.5 would be nice if they made one.
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  21. #96
    Join Date
    Mar 2004
    Location
    Edmonton Alberta
    Posts
    15,353

    Default Re: 69' Banshee Build

    How is the air fuel ratio under boost?
    __________________________________________________ __________________________________
    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 Turbo 350 street/strip

  22. #97
    Join Date
    Apr 2006
    Posts
    1,369

    Default Re: 69' Banshee Build

    If the AFR is going to 14 under load, it sounds like the PV needs to come in even sooner. Either that, or slightly more main jet. If you add main for the light load lean condition, you'll find that the transition from idle circuit to main might go rich. Air bleed correction comes into play, but that takes a LOT of trial and error. Personally I'd rather see a temporary rich condition than a lean one.

  23. #98
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Has anyone modified a PV to get it to come in sooner than a 10.5 inHg? I am assuming it is lighter spring or cutting of spring? I would rather go that route then adding to the main jet because the cruise AFR are good around 13.2.

    I will check on Thursday what AFR is with boost. I wasn't getting onto that hard last drive.
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

  24. #99
    Join Date
    Apr 2006
    Posts
    1,369

    Default Re: 69' Banshee Build

    That's still pretty rich for cruise. A two stage power valve has two vacuum points, usually one around 14" the second at 10". I've never tried one on a boosted setup but they're AWESOME for a driver. Allows for very economical jetting, but still good response. They're pricey though. $40-50. I've also made a tuneable valve that has 2 knurled knobs, one for adjusting spring pressure, the other to lock it. I don't think it would be possible to make without a lathe though.
    Attached Images Attached Images

  25. #100
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    220

    Default Re: 69' Banshee Build

    Quote Originally Posted by Justa350 View Post
    That's still pretty rich for cruise. A two stage power valve has two vacuum points, usually one around 14" the second at 10". I've never tried one on a boosted setup but they're AWESOME for a driver. Allows for very economical jetting, but still good response. They're pricey though. $40-50. I've also made a tuneable valve that has 2 knurled knobs, one for adjusting spring pressure, the other to lock it. I don't think it would be possible to make without a lathe though.
    Thanks for the input. I might try to modify one I have. My main jets are 64. I was going to drop a couple of jet sizes to bring up the cruise AFR, but the jet kit I bought only goes down to 64. I'll have to get a set with smaller jets. Can you get 1/4"-32 set screws and drill them for smaller sizes or do you need a certain shape in the jet?
    - Brennan

    1969 Buick Skylark Custom
    Work in progress - 13 years and counting, but I'm getting close!
    Texas

 

 
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