Autolite 4100 1.08 Vs 1.12

65-Fstbk

Active Member
May 20, 2007
280
13
29
Vancouver, B.C. Canada
Guys I need your experience....

I am thinking of using a bulletproof Autolite 4100 on my motor. I know the 1.12 venturis were typically used on the big blocks and hi-po 289's whereas the 1.08's were used on the smaller displacements. Ratings are supposed to be 480 and 600cfm.

Do you think a 1.12 would run well on my motor:

Converted 1987 5.0HO roller block - stock bore/pistons
Weiand Stealth manifold
ProComp alum heads
Comp Cam 281HR
5 spd trans
3:55 rear
Street car

Or do you think the 1.08 would run better?

Thx.
 
  • Sponsors(?)


Fstbk

Member
Sep 7, 2010
215
2
19
The 4100 on my 289 is perfect, but it's the smaller one.
It feeds a mild cam with stock heads but my crank is a 302 and I'm .060 over so I'm roughly 310 CID. I set my secondaries to work a bit more mechanically and when I hit it hard it can break traction when they kick in. I love these carbs, it feels as crisp as my last fox with efi.
 

rbohm

SN Certified Technician
Apr 12, 2002
6,638
536
204
61
tucson,az
to the OP, go with the 1.12 carb on your combination, it will work just fine.
 
Thread starter Similar threads Forum Replies Date
V Autolite 4100 Secondary Diaphragm Lever replacement 1965 - 1973 Classic Mustangs -General/Talk- 2
M Autolite 4100 Trouble 1965 - 1973 Classic Mustangs -General/Talk- 2
A Need Autolite 4100 Help Asap.. 1965 - 1973 Classic Mustangs -General/Talk- 1
M Autolite 4100 Secondaries Driving Me Nuts 1965 - 1973 Classic Mustangs -General/Talk- 5
ZachMartin68 SOLD Autolite 4100 4 Barrel Carburetor VERY lightly used!!! Engine and Power Adder 4
BlackVert Autolite 4100 troubleshooting Classic Mustang Specific Tech 3
BlackVert Rebuilding an Autolite 4100 carb Classic Mustang Specific Tech 16
J Autolite 4100 4V question Classic Mustang Specific Tech 4
G 4100 autolite carb Engine and Power Adder 0
JC Mustang Autolite 4100 float height, adjustments Classic Mustang Specific Tech 5
JC Mustang Autolite 4100 fuel filter Classic Mustang Specific Tech 4
R Autolite 4100 Choke Stuck off Classic Mustang Specific Tech 1
H autolite 4100 carbs Engine and Power Adder 2
JC Mustang Autolite 4100 Cal emissions difference? Classic Mustang Specific Tech 3
E Autolite 4100 Info Classic Mustang Specific Tech 8
wild70stang Autolite 4100 Venturi Problem Classic Mustang Specific Tech 2
wild70stang Where is the vacuum tube on Autolite 4100 Classic Mustang Specific Tech 3
wild70stang Autolite 4100 Classic Mustang Specific Tech 8
6 Two Autolite 4100 1.12 carbs Engine and Power Adder 1
6 Need Autolite 4100 THROTTLE SPRING Engine and Power Adder 0
6 Looking to buy Autolite 4100 carburetor Engine and Power Adder 1
6 WTB: Autolite 4100 carb 1.08 Engine and Power Adder 0
6 WANTED: Rebuildable Autolite 4100 Engine and Power Adder 3
6 Anybody use Performer 289 and Autolite 4100 ? Classic Mustang Specific Tech 3
6 WANTED: Autolite 4100 carb Engine and Power Adder 0
H Autolite 4100 Secondaries Not Opening Classic Mustang Specific Tech 7
jb1dsl Where do I find all the numbers on an autolite 4100 carb? Pics? Classic Mustang Specific Tech 4
notny41 Autolite 4100 Classic Mustang Specific Tech 51
6 Autolite 4100 or 625/525 Road Demon with Stealth Classic Mustang Specific Tech 3
N Why is my engine sluggish? Any thoughts on Holley vs. Autolite 4100? Classic Mustang Specific Tech 9
C Autolite 4100 / Distributor Vacuum Advance 1965 - 1973 Classic Mustangs -General/Talk- 1
T Plugs - NGK or Autolite? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
S Progress Thread C6AF F 6A F 4bbl Autolite 1965 - 1973 Classic Mustangs -General/Talk- 2
M Autolite 1100 1965 - 1973 Classic Mustangs -General/Talk- 4
Sweetmarie66 2100 Autolite Carb Classic Mustang Specific Tech 8
Steve491 Expired Autolite Ht1 Plugs, Oil Filters, And Fuel Filter Engine and Power Adder 0
billison Had To Get Autolite 2546 For A 88. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 18
Nick Bos 1970 Mustang 302-2v Carb? Classic Mustang Specific Tech 1
sen2two Autolite 25 Plugs 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 8
THEUNDERCOATER Gap For Autolite 25 Fox 5.0 Mustang Tech 5
R Expired Rare Autolite 4 Barrel In Line Carburertor Engine and Power Adder 0
skiwesser11 Questions About Autolite Spark Plugs Fox 5.0 Mustang Tech 2
cptawesome 66 I6 Autolite 1100 Install Won't Start The Welcome Wagon 4
Davidx9x Expired Autolites Ht1, Valve/tb Covers, Towr Brace, Cams, Gears, Steeda Ud Pulleys, Tails, Saleen Axleback Engine and Power Adder 1
B Any difference in Motorcraft SP498 and Autolite AP5143 spark plugs? 2005 - 2014 Specific V6 Tech 1
phendyr Options For Salvaging An Autolite 2100 Carburetor Classic Mustang Specific Tech 3
E Autolite Battery Cover - Need Battery Rec Classic Mustang Specific Tech 0
O Flooded Autolite 1100??? Classic Mustang Specific Tech 11
Dougsters For Sale Autolite 2100 1.23 Vent. 354 CFM Engine and Power Adder 1
Dougsters Rebuilt my Autolite 2100 but have a float level question ? Classic Mustang Specific Tech 4
Similar threads