Just wondered what everyone else is running. I've got an autolite 1100/Ford carb on a couple of my straight 6s and I keep having to replace the accelerator pump diaphragm every year. Does someone offer an ethanol resistant pump diaphragm that will last a little longer (the blue/green one)?.... Neoprene or viton I think is the word I'm looking for.? I replaced my GM's quadrajet accel.pump and needle and it's been working great for 2 years now. Would like to do the same with the autolite if someone knows who carries them.
Edit: I'm thinking a Holley 135-10 diaphragm is VERY similar and should work with a slight modification or maybe bolt right on.
Autolite 1100 constant maintenance
Autolite 1100 constant maintenance
-'61 F100 short box flareside (classic street rod) 223, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd
- ThinLizzy13
- Posts: 763
- Joined: October 5, 2012, 5:29 am
- Location: Catskills NY
Re: Autolite 1100 constant maintenance
Is the diaphragm itself getting a hole in it or does it just start leaking? Sometimes the metal cover can get slightly warped from over tightening which will allow it to leak pre maturely.
FWIW I ran a rebuild kit from Mike’s Carburetors and had zero issues with leaking or deterioration. I think they sell individual parts on their website.
FWIW I ran a rebuild kit from Mike’s Carburetors and had zero issues with leaking or deterioration. I think they sell individual parts on their website.
'63 F100 223 3OT
‘20 F150 XL
‘20 F150 XL
- Gravemetal
- Posts: 103
- Joined: September 26, 2016, 11:14 pm
- Location: Central Alberta
Re: Autolite 1100 constant maintenance
If you are googling stuff the word is vitron. I have used them in hydraulic situations
Ford... the other four letter "F" word
Chevrolet: Condition hopeless entire vehicle runs on leftover engine technology
Six cylinders make farting sounds
Chevrolet: Condition hopeless entire vehicle runs on leftover engine technology
Six cylinders make farting sounds
Re: Autolite 1100 constant maintenance
The diaphragm hardens and cracks. Spider web cracking across the whole thing. I've been using a Hygrade pump that comes in the kit from a local parts store, I'll have to try the one you suggested from online. I might be a little paranoid but I really don't like random fuel leaks in the engine bay since a cracked fitting almost burned my 57 Chevy to the ground when it sprayed gas onto the coil last year.ThinLizzy13 wrote:Is the diaphragm itself getting a hole in it or does it just start leaking? Sometimes the metal cover can get slightly warped from over tightening which will allow it to leak pre maturely.
FWIW I ran a rebuild kit from Mike’s Carburetors and had zero issues with leaking or deterioration. I think they sell individual parts on their website.
-'61 F100 short box flareside (classic street rod) 223, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd
Re: Autolite 1100 constant maintenance
Thanks, couldn't remember but that's probably what I got for the Q-jet.Gravemetal wrote:If you are googling stuff the word is vitron. I have used them in hydraulic situations
-'61 F100 short box flareside (classic street rod) 223, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd
-'62 F100 long box unibody (murdered out) 460, C6
-'66 F100 long box flareside (original) 240, 4spd
-'64 F100 long box styleside (pro-street) 307 GM, 700R4
-'64 F100 long box styleside (daily driver) 223, 3spd
-'65 F100 long box styleside (original) 240, 4spd
-'66 M100 long box styleside (sold) 240, 4spd
-'64 F250 long wrongbox styleside (sold) 292, 4spd