Re: Dyno Simulators and ignition timing
[Re: mopar dave]
#2482613
04/14/18 03:14 PM
04/14/18 03:14 PM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,185
Bend,OR USA
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Sounds like that program is based on Chevy V8 engine results None of the Mopar V8 engines I've work on made from 1952 to 1990, no NASCAR race motors though, liked more than 36 degrees total on gasoline, none of them At the track or on the dyno
Last edited by Cab_Burge; 04/14/18 03:18 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Dyno Simulators and ignition timing
[Re: BigBlockMopar]
#2482701
04/14/18 07:25 PM
04/14/18 07:25 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I went through the trouble of setting up a rpm retard in high gear.. on my junk it made ZERO difference so after 1 season I pulled it off.. my timing was best around 34*.. my last SB liked 40* on the dyno.. I used 36* on the street due to fuel(I run moose piss pump crap.. still do unless I'm going to the track)
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Re: Dyno Simulators and ignition timing
[Re: mopar dave]
#2482862
04/15/18 01:22 AM
04/15/18 01:22 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Yur right. Just too many generics in that program. I'll stay with 34* locked out to be safe for now. The plugs will tell you the correct timing. Unless the Chevy has a late model head they take 42 total most of the time. And big block stuff was about 40. Every BBM took 39-40. I'd be surprised if 34 is best power for you. The only way to know is to test.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Dyno Simulators and ignition timing
[Re: mopar dave]
#2483207
04/15/18 06:40 PM
04/15/18 06:40 PM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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If you're willing to play with a curve on that distributor, maybe using the heaviest pair of springs and modifying the weights for a short advance. I'm thinking every 1000 rpm that can be delayed before 'all in' will be 1000 rpm it doesn't show retard on the top. https://www.tapatalk.com/groups/racingfu...-less-t765.htmlCan you afford the time experimenting??
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Re: Dyno Simulators and ignition timing
[Re: mopar dave]
#2483328
04/15/18 10:14 PM
04/15/18 10:14 PM
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Joined: Jan 2003
Posts: 11,712 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,712
Portage,michigan
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Absolutely nothing odd about running 40 degrees of timing for best results. Known of a few combinations over the years( smallblocks) that was the case. One was a stroker B1BA headed motor that immediately comes to mind. Few years back i had a ross flattop 416 Hensley built i had eddies on top of. Sold the whole top end. Ran that combo several years, liked 34 degrees best( and i tried it everywhere) Put W5 heads on that shortblock, TTi W 5 headers, a modified Victor W2 i bought from Brett, and plopped all that stuff on the untouched 416. Had the timing all over the place on that motor, and the car flat ran a tenth better at 40 degrees than it did at 36, 34 or 32.... the other places i ran it..... late that same year i broke that cast crank 416 shortblock. Built a new roller x block 422 with CP domes. Dropped the W5 topend on that, and it was happiest at 32.......... slower everywhere else
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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