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#451 |
Registered User
Join Date: Mar 2004
Location: Hoytsville, Utah
Posts: 3,365
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Re: Post Your Straight Six Pics!
I bought myself a Birthday present and it came today, one day early. Langdon's ceramic-coated cast iron headers
![]() ![]() ![]() I stuck them on just to take a picture. These are gonna be great! Now I can start working on the exhaust pipes. I'm still trying to decide on an intake manifold. Indecision may or may not be my problem. ![]() ![]()
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#452 |
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Join Date: Jun 2011
Location: Monroe, WI
Posts: 1,415
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Re: Post Your Straight Six Pics!
Very Nice!
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Adam My 1967 C10 - Turbo 250 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=485843 (608) 214-8706 |
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#453 |
Senior Member
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Location: Winona Lake, IN
Posts: 6,273
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Re: Post Your Straight Six Pics!
Very cool. Happy birthday to you!
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#454 |
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Join Date: Feb 2012
Location: So. Cali.
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HAPPY BIRTHDAY ! :
![]() Be aware that splitting the exhaust like this , reduces scavenging and so reduces available power at low RPM's like off line acceleration . Adding a crossover as close to the outlets as possible , will bring back the low RPM power and you'll still look nice and have that roaring open exhaust sound . Did I ever post pix of my 292 ? I'm getting ready to tear it down and might have pix of it as purchased....
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-Nate Geezer '49 3100 235 W/ Muncie SM420 SOLD '69 C/10 shortbed sidemount survivor 250 L6 W/ 350TH ![]() |
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#455 |
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Join Date: Oct 2012
Location: Chicago, IL
Posts: 26
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Re: Post Your Straight Six Pics!
none of you guys running 3x1bbl...i was thinking about setting up my 6 with the 3x1 bbl...is there a reason no one runs this carb/intake setup? is it that terrible to get running well?
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#456 |
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Join Date: Feb 2012
Location: So. Cali.
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In general ;
Using one carby per intake port will give you maximum fuel economy , power and throttle response all at the same time . It is critical to personally check and make sure you have identical carbys and jets before beginning . Never trust the guy who sold you the carbys .! Once they're installed you must have each one disconnected from the others and have seperate return springs , balance all carbys until they draw the same amout of air @ idle , (use a Manometer or listen for the hiss ) , then re connect the linkage and adjust it so that when the accellerator pedal is flat on the floor , all the throttle pates are perfectly vertical , now you're done and will be able to shame about 1/2 the stock V-8's and break U-Joints etc. Good fuel filtration is imperative , I like one before each carby , always a clear plastic one so you can see the crud before it screws up your carbys and time consuming proper adjustment . Once properly adjusted , CARBURETTORSDO NOT GO OUT OF ADJUSTMENT !! ![]() " CARBURETTOR " is a French word meaning ' Leave it alone ! ' " ![]()
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-Nate Geezer '49 3100 235 W/ Muncie SM420 SOLD '69 C/10 shortbed sidemount survivor 250 L6 W/ 350TH ![]() |
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#457 |
Senior Member
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Location: Alexandria, MN
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Re: Post Your Straight Six Pics!
" CARBURETTOR " is a French word meaning ' Leave it alone ! ' " .
From an autos and small gas engine teacher.... this phrase will be used for a long time.... FN awesome!!!! --Mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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#458 |
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Join Date: Dec 2011
Location: New York City
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Re: Post Your Straight Six Pics!
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#459 | |
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Join Date: Feb 2012
Location: So. Cali.
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Re: Post Your Straight Six Pics!
Quote:
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-Nate Geezer '49 3100 235 W/ Muncie SM420 SOLD '69 C/10 shortbed sidemount survivor 250 L6 W/ 350TH ![]() |
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#460 |
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Join Date: Mar 2004
Location: Hoytsville, Utah
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Re: Post Your Straight Six Pics!
Can you expand on this a little? I'm wieghing my options for a fuel system, and I've never really heard anyone else lead me in this direction. I have 3 matching carbs, but I'm not exactly sure what they are just now, but that's not really an issue, having to get others. I would probably buy all new anyway. I'm sure some are better than others. But if I could gain power without losing toooo much milage, I may consider this route. I haven't bought an intake manifold yet because I can't decide what I want. I'm pretty sure I don't want a 4bbl, though. I like different.
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green Last edited by ETsC10; 11-11-2012 at 10:06 AM. |
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#461 | |
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Join Date: Jun 2011
Location: Monroe, WI
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Re: Post Your Straight Six Pics!
[quote=pritch;5653207]
Quote:
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Adam My 1967 C10 - Turbo 250 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=485843 (608) 214-8706 |
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#462 |
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Join Date: Feb 2012
Location: So. Cali.
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It's pretty simple :
More carbys allows better metering of the intake fuel charge , as GM's L6 engines all have three intake ports , this means three carbys will work the very best . Not a simple thing to adjust in the beginning but once done it's terrific . InLine engines with single carbys always have a long intake runner so the end cylinders always run lean , even of you plop on a two or four barrel carby . More precise metering of the fuel improves throttle response and tractability in daily operation , you really have to experiance it to believe the massive improvement . Be aware that romping the throttle will use more fuel no matter what else you've done , a little bit of reality check there .
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-Nate Geezer '49 3100 235 W/ Muncie SM420 SOLD '69 C/10 shortbed sidemount survivor 250 L6 W/ 350TH ![]() |
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#463 | |
Registered User
Join Date: Mar 2004
Location: Hoytsville, Utah
Posts: 3,365
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Re: Re : Multi - Carburation
Quote:
![]() ![]() ![]() I think I just might go this route. I understand linkages and how to make things work as one, and this would be a nice challenge. I've done a little research last night and I'll do some more this weekend, but it all makes perfect sense to me. Good amount of "cool" factor, too. I'm sure there are some carbs that would be easier to link up than others. That's what I'll look for. I'm sure, with my luck, the 3 identical carbs I currently have are the toughest to link. ![]()
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#464 |
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Location: Richmond, KY
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Re: Post Your Straight Six Pics!
Keep us, or at least me updated on your three carb setup, if u go that way. I'm planning to do the same with my 250 just haven't got to that point yet.
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Raymond 1967 Chevy C/10 LWB Custom Optioned "big window truck" AKA Copper. My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=452594 The story of how I got the truck:http://67-72chevytrucks.com/vboard/s...d.php?t=450939 Ole Smokey Build Thread 2002 Silverado 8.1L Crew Cab **SOLD**http://67-72chevytrucks.com/vboard/s...d.php?t=618402 |
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#465 |
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Join Date: Mar 2004
Location: Hoytsville, Utah
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Re: Post Your Straight Six Pics!
I'll do it, Slick Copper. I ordered the manifold last week, so I hope I have a package waiting for me when I get home tomorrow night. (I work out of town during the week).
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#466 |
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Join Date: Mar 2004
Location: Hoytsville, Utah
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Re: Post Your Straight Six Pics!
Oh yeah!
![]() My 3x1 manifold came this week. ![]() The 1st carb is taking a bath right now. I'll rebuild it nest weekend and throw #2 in to soak. I only have enough carb cleaner for one at a time. It's going to take a little modification to get hot water heat on this intake, but I have a couple of ideas. I'm going to go ahead and use these model 'B' carbs, since I have 3 of them.
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'68 Panel Project Boogie Chillin' '68 C-10 Ol' Green |
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#467 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: Post Your Straight Six Pics!
^ that is sweet makes me want to go spit on my 350
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Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
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#468 |
Hand Crafted C-10
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Location: Burien, WA
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Re: Post Your Straight Six Pics!
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#469 |
Registered User
Join Date: Mar 2008
Location: Spring, Tx
Posts: 5
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Re: Post Your Straight Six Pics!
just bought it work not in progress but will start soon
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#470 |
1967 SWB sw
Join Date: May 2005
Location: Jax Florida
Posts: 80
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Re: Post Your Straight Six Pics!
definitely keep this thread goin
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#471 |
Six in a row makes it go...
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Location: Vacationland: Maine
Posts: 1,346
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Re: Post Your Straight Six Pics!
I've often dreamed of this carb set-up. Please post your experience with it - either here or in a separate thread - after you get it going. Please post the dog's opinion too.
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67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#472 |
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Join Date: Dec 2011
Location: New York City
Posts: 648
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Re: Post Your Straight Six Pics!
Any shots of how you ran your kickdown cable to the linkage by the carb? I swapped the manual for a TH350, and trying figure out how to make it work. The obvious spot on the bottom of the throttle linkage doesn't work because the lower part of the linkage is at or just below the manifold. The linkage connected to that, at the carb, goes side to side instead of front to back.
Ideas? Shots of how you ran yours? Thanks |
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#473 |
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Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: Post Your Straight Six Pics!
The 327 in my 66 bit the dust and I wanted to go back to what was original to my truck. Picked up a 250 w/ a brand new Offenhauser intake and Flow Tech headers. Found a Holley 390 to go on top. Working on a few small things like linkages and a bracket for power steering. Hopefully I'll get to fire it up soon!
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#474 |
Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,436
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Re: Post Your Straight Six Pics!
For tube headers you would be wise to replace those locator pins on both ends of the head with bolts or even better, threaded studs.
Every hole down the side of the head is threaded 3/8-16. The heads originally had those end pins and the third hole from each end had a threaded stud for a 3/8-24, nut. Originally they had both long and short clamping bars for between the IN and EX runners. I found extra short bars and used only those between the tube headers and a Clifford manifold. I put studs in all eight holes and it makes it a lot easier to hold everything in place for assembly.
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'67 GMC 2500, 292, 4spd, AC |
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#475 | |
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Join Date: Feb 2012
Location: So. Cali.
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Good man ! .
Now your truck will stand out even more. -Nate Quote:
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