Quote:
Can't view photos, but you sir, are either a madman or a genius.
I'm not sure this is an either/or situation. 
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| 300CFM Carter Thermo-Dual https://slantsix.org/forum/viewtopic.php?t=49546 |
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| Author: | cum*do_ge [ Sun Aug 12, 2012 8:05 am ] |
| Post subject: | 300CFM Carter Thermo-Dual |
You did what? Cut a 4-bbl in half? From your friendly "Precision Hacksaw Machinist" - I spent years learning a lot about carburetion, trying to get a Four-Barrel carb to run right on my 225 Slant Six. I learned it was just too over-carbureted, too many CFM, not enough cubes. So I decided to make my own progressive Two-Barrel carb. I figured an 850-cfm Carter Thermo-Quad ran a 440 so well, half of one should run a 225 pretty good. So I took a non-smogger and cut it in half! Countless man-hours and some J-B Weld later, ta-da! My one-of-a-kind 300-cfm Carter Thermo-Dual and intake manifold to match. It's amazing what you can accomplish with a hacksaw and a file. This was all done by hand, nothing was 'machined'. How's that for home-fabricated? https://skydrive.live.com/redir?resid=D ... 8BD346!252 |
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| Author: | Kroil [ Sun Aug 12, 2012 9:10 am ] |
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Can't view photos, but you sir, are either a madman or a genius. |
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| Author: | cum*do_ge [ Sun Aug 12, 2012 9:20 am ] |
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Sorry, try viewing the pics using this link - https://skydrive.live.com/redir?resid=D ... 8BD346!252 |
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| Author: | GTS225 [ Sun Aug 12, 2012 9:49 am ] |
| Post subject: | |
You really need to post a how-to, with many more pics. A description of cut line locations would be highly beneficial, too. Roger |
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| Author: | cum*do_ge [ Sun Aug 12, 2012 10:10 am ] |
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I'm still figuring out how to post a pic on this site, are the pics showing now? I could post more pics and info of the carb disassembled. |
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| Author: | Joshie225 [ Sun Aug 12, 2012 10:41 am ] |
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Cool idea. It's nice that the Carter has the float chambers on the sides rather than the front and back like a Holley. My question is, how does it run? Any before and after testing? |
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| Author: | Rust collector [ Sun Aug 12, 2012 11:46 am ] |
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I like it! |
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| Author: | Reed [ Sun Aug 12, 2012 12:15 pm ] |
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Please post as many pictures and details of this as possible. This is a GREAT idea and I can't wait to hear how it works. |
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| Author: | SlantSixDan [ Sun Aug 12, 2012 12:52 pm ] |
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Quote: Can't view photos, but you sir, are either a madman or a genius.
I'm not sure this is an either/or situation.
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| Author: | Reed [ Sun Aug 12, 2012 2:11 pm ] |
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   Brilliant! |
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| Author: | cum*do_ge [ Sun Aug 12, 2012 5:37 pm ] |
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Wish I knew how to post pictures on here. I have more disassembled pics on Photobucket, I just don't know how to do it. |
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| Author: | emsvitil [ Sun Aug 12, 2012 5:39 pm ] |
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Quote: Wish I knew how to post pictures on here. I have more disassembled pics on Photobucket, I just don't know how to do it.
There's a sticky in this section of the forum on how to do it..
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| Author: | Jeb [ Sun Aug 12, 2012 5:52 pm ] |
| Post subject: | |
This is awesome, its a BBD that you can actually get tuning parts for! |
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| Author: | Reed [ Sun Aug 12, 2012 5:59 pm ] |
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Go to photobucket, put your mouse over the picture you want to post. A drop down menu will appear with four different blocks of text. You want the bottommost block, titled "IMG code." Click once anywhere in that text and it will say "copied." Now come to the best web board in the universe (that's slantsix.org), start a new port or post a reply, and in the dialog box paste the text copied from photobucket. VOILA! You have now posted a link to a picture. It is really very easy. |
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| Author: | DusterIdiot [ Sun Aug 12, 2012 9:00 pm ] |
| Post subject: | Some but not a lot... |
Quote: This is awesome, its a BBD that you can actually get tuning parts for!
TQ's aren't as compatible with the available tuning parts for the AFB/AVS, some things will work but you may need to scavenge parts from small block TQ's to get a bit closer to what is needed. Two things I'd be worried about: 1) Even 30 years ago, TQ's were notorious for having the phenolic resin bowl warp and leak, you may have a good donor now, but it's only a matter of time... 2) Small plenum manifolds with the big secondary aren't very well matched, typically this creates low vacc. signal once the secondary cracks a bit (it doesn't take much opening angle on the larger plate to flow the same as the smaller plate at less of an angle). Quick drop off of vacc. is usually accompanied by poor gas mileage (think large Holley 2 barrel on not so gasket matched super six manifold...) It is a nifty idea that one carb manufacturer has put into play, but with nominal bore sizes...I think using one of the 340/360 TQ's would have been better start. Let us know how testing goes. -D.Idiot |
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