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Autolite 4100 1.08 Vs 1.12

  • Thread starter Thread starter 65-Fstbk
  • Start date Start date May 30, 2013

65-Fstbk

15 Year Member
May 20, 2007
316
26
49
Vancouver, B.C. Canada
May 30, 2013
#1
  • May 30, 2013
  • #1
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.
 

woodsnake

15 Year Member
Jan 16, 2007
1,352
15
69
Hicksville, NY
May 30, 2013
#2
  • May 30, 2013
  • #2
Are thees your only options? There are a few more choices today, other than either Holley, or Edelbrock..
 

65-Fstbk

15 Year Member
May 20, 2007
316
26
49
Vancouver, B.C. Canada
May 30, 2013
#3
  • May 30, 2013
  • #3
woodsnake said:
Are thees your only options? There are a few more choices today, other than either Holley, or Edelbrock..
Click to expand...
Lots of options (too many I think). I was thinking of using a 4100 b/c it is touted as one of the best carburetors ever built. Set it and forget it.
 

Fstbk

Member
Sep 7, 2010
215
2
19
May 30, 2013
#4
  • May 30, 2013
  • #4
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

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Jun 1, 2013
#5
  • Jun 1, 2013
  • #5
to the OP, go with the 1.12 carb on your combination, it will work just fine.
 
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