|
Re: vac advance on street car?
[Re: 70VcodeCoronetRT]
#1145041
12/27/11 02:01 PM
12/27/11 02:01 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Hello, I've been reading a lot about the need for Vacuum advance distributor for a street car. But I swear 90% of the BB street builds I see have a MSD Pro Billet non vac advance distributor. So do I need the vacuum advance? This is a mild 500hp BB street build. Thanks
They do help for fuel mileage when your cruising
|
|
|
Re: vac advance on street car?
[Re: MR_P_BODY]
#1145044
12/27/11 02:19 PM
12/27/11 02:19 PM
|
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
Pacnorthcuda
Too Many Posts
|
Too Many Posts
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
|
Quote:
Quote:
Hello, I've been reading a lot about the need for Vacuum advance distributor for a street car. But I swear 90% of the BB street builds I see have a MSD Pro Billet non vac advance distributor. So do I need the vacuum advance? This is a mild 500hp BB street build. Thanks
They do help for fuel mileage when your cruising
and part throttle response.
|
|
|
Re: vac advance on street car?
[Re: 1_WILD_RT]
#1145045
12/27/11 03:12 PM
12/27/11 03:12 PM
|
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Quote:
I can't recall the last time I hooked up a vac advance...
Then your wasting fuel.... Unfortunately most serious aftermarket ignitions are designed by guys with more race thinking than street thinking....
If so it isn't much. The last 3 engines (2x440's) had curved and welded distribs. The Supercharged 440 in my 67 coronet netted me 12mpg w/ 3.91's doing 65-70mph or so over 50+ miles. The 340 swinger w/ holley 750DP and 3.55's got over 17mpg at 65-70 and this 440-6 build w/ solid roller cam avg'd around 12-13 putting (40-45mph) on back roads to and from the track (40+ miles) How much better would a vac advance be?
|
|
|
Re: vac advance on street car?
[Re: lewtot184]
#1145047
12/27/11 03:20 PM
12/27/11 03:20 PM
|
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
i use them on my streeters. they make perfect sense, and are tunable. they help keep the combustion chambers clean and aid in fuel mileage. i used to be the "full centrifugal only" type guy but got away from that thinking years ago.
how much does one want it to advance??
|
|
|
Re: vac advance on street car?
[Re: Pacnorthcuda]
#1145050
12/27/11 03:57 PM
12/27/11 03:57 PM
|
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Yep--I adjust to 52-54 total.
Is that too much for a 11:1+ motor
|
|
|
Re: vac advance on street car?
[Re: Mr.Yuck]
#1145051
12/27/11 04:00 PM
12/27/11 04:00 PM
|
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
Pacnorthcuda
Too Many Posts
|
Too Many Posts
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
|
Quote:
Quote:
Yep--I adjust to 52-54 total.
Is that too much for a 11:1+ motor
It might very well be too much, depending on what fuel you're feeding it. If you get any part throttle pinging then back off.
|
|
|
Re: vac advance on street car?
[Re: 383man]
#1145053
12/27/11 05:44 PM
12/27/11 05:44 PM
|
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
I also build my eng more toward the race mode then a cruiser even though I cruise in it 99% of the time. I just have a mech only Mallory dist and it has full advance by 1800 rpm of 38 degrees. I dont think I would want 52 or so myself with my eng and if I was that worried about gas milage I would be in the wrong hobby.  Course I think race mode and that is full throttle the vacum advance dont work anyway. Ron
same boat here Ron. I run 93..I have mine in full at 2k (38*) The meth/H2O injection helps a ton under load, but it won't fog until vaccuum is at zero an at cruise my vac gauge is at 20+
|
|
|
Re: vac advance on street car?
[Re: 70VcodeCoronetRT]
#1145054
12/27/11 05:51 PM
12/27/11 05:51 PM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
Meh, Haven't run vacuum advance in quite a few years now. The last 318/360 headed motor that we pulled apart that I had run this way looked clean as a whistle on the tops of the pistons and would pull down decent mileage for what it was. The 440 used to get 14-15 mph going down the Interstate at 70mph with 3.23 gears, .528 mechanical, headers and Holley 750. 
|
|
|
Re: vac advance on street car?
[Re: mikemee1331]
#1145056
12/27/11 06:37 PM
12/27/11 06:37 PM
|
Joined: Jul 2003
Posts: 1,212
Canton, Ohio
Crazy68Dart
pro stock
|
pro stock
Joined: Jul 2003
Posts: 1,212
Canton, Ohio
|
There was a pretty good thread about this a while back. Try a search.
Depending on how it is hooked up, can help with mileage, cooling, etc.
383, Hemi 4-Speed, AlterKtion, D60
|
|
|
|
|
