Re: 400 question
[Re: indytex96]
#947071
03/09/11 12:29 PM
03/09/11 12:29 PM
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Joined: Jan 2003
Posts: 5,445 So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,445
So Cal
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A couple of things to do.. 1. Increase the shooter size to 0.031 2. Increase timing to 35 degrees 3. Liten the Holley secondary spring 4. Make sure the accelerator pump is set rite Just my $0.02...
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Re: 400 question
[Re: DaytonaTurbo]
#947073
03/09/11 02:12 PM
03/09/11 02:12 PM
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Joined: Mar 2008
Posts: 270 SE Kansas
indytex96
OP
enthusiast
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OP
enthusiast
Joined: Mar 2008
Posts: 270
SE Kansas
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Quote:
Get your timing curve sorted out first. The low-cr smogger big blocks are very sensitive to this.
What do suggest on the curve?
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Re: 400 question
[Re: indytex96]
#947074
03/09/11 04:54 PM
03/09/11 04:54 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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You'll want to play with your distributor curve. Remember to set it up first with the vacuum advance disconnected and plugged at the intake. I set mine for as much initial timing as it would take while still being able to restart hot. With a smogger 440 with a lunati voodoo 60303 cam and 440source heads it liked near 20* at idle and I set it for 38* total in by 2500rpm. Not too much longer after that it wouldn't want to restart hot, I thought I had too much initial timing(turned out to actually be a charging system issue), so I backed the initial timing back to around 15. Could not get rid of that initial launch bog until I figured out the problem was my charging system, not too much timing. Bumped the timing back up and the bog was gone again.
With a stock cam and heads, you won't need as much timing as mine did, but I would still start by figuring out how much initial it will tolerate, then dial in your total from there.
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Re: 400 question
[Re: RapidRobert]
#947076
03/10/11 10:57 AM
03/10/11 10:57 AM
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Joined: Mar 2008
Posts: 270 SE Kansas
indytex96
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OP
enthusiast
Joined: Mar 2008
Posts: 270
SE Kansas
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X 2. in order: initial w vac gauge method, w that figure in hand shorten the slots to get 35 (SB) w vac adv unhooked/plugged. Springs-toss the heavy one w the long loop & start by adding one of the very light ones in the MP cellophane pkg & want to stay just under the pinging point at WOT up thru the gears on your hottest/driest day no matter where (RPM) that makes the slots max out at. then plug in the vac adv & want (A) the most adv coming in (B) as fast as it can (2 adjustments) WO pinging at steady PART throttle (high vacuum) at an RPM at or above where the slots (mech adv) is all in. EDIT it's a BB so 36-38 for total (vac adv capped)
Thanks, I'll play with the timing this weekend and see if it helps. When you say shorten the slots do you mean the slots for the advance in the distributer?
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Re: 400 question
[Re: indytex96]
#947077
03/10/11 02:03 PM
03/10/11 02:03 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
X 2. in order: initial w vac gauge method, w that figure in hand shorten the slots to get 35 (SB) w vac adv unhooked/plugged. Springs-toss the heavy one w the long loop & start by adding one of the very light ones in the MP cellophane pkg & want to stay just under the pinging point at WOT up thru the gears on your hottest/driest day no matter where (RPM) that makes the slots max out at. then plug in the vac adv & want (A) the most adv coming in (B) as fast as it can (2 adjustments) WO pinging at steady PART throttle (high vacuum) at an RPM at or above where the slots (mech adv) is all in. EDIT it's a BB so 36-38 for total (vac adv capped)
Thanks, I'll play with the timing this weekend and see if it helps. When you say shorten the slots do you mean the slots for the advance in the distributer?
Yes he does.
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Re: 400 question
[Re: DaytonaTurbo]
#947084
03/11/11 03:48 AM
03/11/11 03:48 AM
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Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Stock 400 right? Use the Mopar perf dist with the adjustable vacuum advance.Tune per the instructions.No reason not to use it with a stock engine.
Leave the gun.......take the Cannoli's....Mike
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Re: 400 question
[Re: 71charger]
#947085
03/11/11 11:58 AM
03/11/11 11:58 AM
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Joined: Mar 2008
Posts: 270 SE Kansas
indytex96
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enthusiast
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OP
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Joined: Mar 2008
Posts: 270
SE Kansas
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Quote:
With my 400 and 3.23 gears, it was a slug using total timing in the 30s. I'm running a total of about 50 degrees and it's great.
Wow, 50 degrees seems like a bunch. How are you keeping it from pinging?
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