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1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
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Discussion Starter · #22 ·
here is your chance to join the club


ken

View attachment 852591
You have no idea how bad I want to play around with one of those. Same for a 3x2. I have plenty of motor for either one big carburetor (current deal) or multiple ‘little’ ones. Hmmm…….
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #26 ·
Which one did you say tolerates the heat better?
The one in the middle, black anodizing. 650 cfm, air velocity is faster vs 750, that‘s why it behaves better in this heat. But it also won’t flow as much at 6000+ rpm. Big carburetors on little motors, there’s always trade-offs and compromises.
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #31 ·
A pair of 390s would work well on the XF-8
but requires a little hood modification or one of those tear drop bubble hoods.

ken
My son and I can have the hood off in ten minutes. There’s even a spot in the living room for it. Simple problem/simple solution 😜
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #42 ·

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
·
2,413 Posts
Discussion Starter · #43 ·
As a young man, I may or may not have been a little self-destructive 😇
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #45 ·
P

Personally I fail to see the logic of asking for or thinking you need help . Looks like your doing a fine job by yourself getting them carbs .

And some nice ones they are too unless I miss my guess.
Thank you 😎
The thing is…. there are more of them. I ran out space on the workbench 🤪
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #67 ·
Race carb. Didn’t have provisions for PCV, so I put one in it

Automotive tire Guitar accessory Musical instrument accessory Automotive design Rim
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #69 ·
Looks like nice work! I finally did some screwing around on my Holley. Starts a lot better, stumble mostly gone. Only 10" of vacuum though. But at least it's steady.

Next step is I think I need to retime it. Part of my problem was I had the advance hooked to manifold vacuum. Seems to like the timed port better. I also adjusted the squirter cam position.

Only issue now is I borrowed my timing light to my neighbor to use on his boat. He then sold the boat. And forgot my timing light in the hull!
Yeah, gotta have timing & PCV all squared away. Ignition all has to be 100%, no vacuum leaks, fresh gasoline, stable fuel pressure. Without all of that, carb tuning is just chasing one‘s tail.

Tell me more about your motor, maybe I can help with that stumble.
 

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Premium Member
1965 Mustang GT. 11.898 @ 113.646, all motor, three pedals
Joined
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2,413 Posts
Discussion Starter · #71 ·
View attachment 855261 '66 289 .030 over, balance and blueprinted, factory cast iron heads (ported/smoothed I'm told) 10:1 Probe flat tops, Comp Cams high energy FS 268H-10, pertronix III ignition and flamethrower coil, factory dizzy, motorcraft plugs, Holley 4776-7, 1" open spacer, edelbrock performer dual plane, long tube headers, billet flywheel, centerforce clutch, 3spd that someday will be removed for a T10. Factory fuel pump (never got around to upgrading but it seems to do the work) anything else? Possibility of a 302 crank/289 rods, but doubtful. Had the pan off a number of years back, think it's still 289 stuff.
You‘ve built a nice piece, lots of good parts 👍
First thing I’d do (after sorting out the ignition/timing) is try a four-hole spacer. Really strengthens the vacuum signal. I suspect the transfer circuit is a little lazy; a different spacer just might wake it up.
 
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