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Timing on Race Gas for 6.4 #3078399
09/18/22 12:55 PM
09/18/22 12:55 PM
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Dyno1 Offline OP
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I have a 6.4 that is raced in NHRA/NMCA Stock Eliminator. I am using a Holley Dominator system on the car. 2019 1320 Challenger. I use a leaded race gas (Renagade 116). What has anyone experienced with ignition timing? I use 26 - 27 degrees total above 6000rpm, generally finish line rpm about 7600-7700. I have been told that is max timing to use because of detonation above 27*. Anyone run 28 to 30* of timing and did you pick anything up? Thanks, Dyno

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3078636
09/19/22 07:40 AM
09/19/22 07:40 AM
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Dayton, OH
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1980volare Offline
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Every engine is different. One might take 30, one might take 25.



Since you’re using the holley, have you verified your timing? Your 27* might actually be 24, or even 30+. They holley has no way to tell if your crankshaft reluctor is in the correct spot. I’ve seen them off quite a bit, mine in particular has to use a 3* timing offset to get it where it needs to be.

Checking the plugs after a pass would be my suggestion. I also peek at the fuel flow numbers in the holley data log to see what timing changes make to fuel flow consumption, assuming all your fuel data is correct in the holley.

Re: Timing on Race Gas for 6.4 [Re: 1980volare] #3079159
09/20/22 09:14 PM
09/20/22 09:14 PM
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Dyno1 Offline OP
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I did verify the timing. I use an ATI balance with a Stanke timing pointer. I will be going back on the dyno in a month and try to creep up on the timing and see if the numbers drop. I also am trying to find a solid roller lifter that will work. NO ONE besides Jesel ($3500) makes one.

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3079229
09/21/22 08:28 AM
09/21/22 08:28 AM
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May be worth a call to Dave Weber at MMX, since he's done a lot of G3 Hemi work. He's the Weber in the former Ritter & Weber race team.

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3079543
09/22/22 09:35 AM
09/22/22 09:35 AM
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Pattison Texas
csk Offline
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Originally Posted by Dyno1
I have a 6.4 that is raced in NHRA/NMCA Stock Eliminator. I am using a Holley Dominator system on the car. 2019 1320 Challenger. I use a leaded race gas (Renagade 116). What has anyone experienced with ignition timing? I use 26 - 27 degrees total above 6000rpm, generally finish line rpm about 7600-7700. I have been told that is max timing to use because of detonation above 27*. Anyone run 28 to 30* of timing and did you pick anything up? Thanks, Dyno

How did you do the Holley system & not get the factory functions of the car messed up, I have been trying to find a set up that will have wide band o2 fuel control & tuning on my 2020 T/a 392 ?


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3080000
09/23/22 02:53 PM
09/23/22 02:53 PM
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To make the most HP you can on your motor you don't want to use the highest octane gas out there, it is a waste of money and fuel.
I would try either C10 or C11 if you insist on running leaded race fuel.
The least octane fuel you can run in that motor without detonation will make the most power and make the car run the fastest scope
I've been there done that with my old M.W. 1963 Plymouth stocker shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Timing on Race Gas for 6.4 [Re: csk] #3080055
09/23/22 05:24 PM
09/23/22 05:24 PM
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Originally Posted by csk
Originally Posted by Dyno1
I have a 6.4 that is raced in NHRA/NMCA Stock Eliminator. I am using a Holley Dominator system on the car. 2019 1320 Challenger. I use a leaded race gas (Renagade 116). What has anyone experienced with ignition timing? I use 26 - 27 degrees total above 6000rpm, generally finish line rpm about 7600-7700. I have been told that is max timing to use because of detonation above 27*. Anyone run 28 to 30* of timing and did you pick anything up? Thanks, Dyno

How did you do the Holley system & not get the factory functions of the car messed up, I have been trying to find a set up that will have wide band o2 fuel control & tuning on my 2020 T/a 392 ?


Race car only. None of the factory computers are used.

Re: Timing on Race Gas for 6.4 [Re: Cab_Burge] #3080057
09/23/22 05:26 PM
09/23/22 05:26 PM
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Originally Posted by Cab_Burge
To make the most HP you can on your motor you don't want to use the highest octane gas out there, it is a waste of money and fuel.
I would try either C10 or C11 if you insist on running leaded race fuel.
The least octane fuel you can run in that motor without detonation will make the most power and make the car run the fastest scope
I've been there done that with my old M.W. 1963 Plymouth stocker shruggy


I also race a 1968 Barracuda in SS/AH, so it is easier to carry just one brand of fuel. I have tried VP C12 and there was no difference.

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3080067
09/23/22 05:55 PM
09/23/22 05:55 PM
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Pattison Texas
csk Offline
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Originally Posted by Dyno1
Originally Posted by csk
Originally Posted by Dyno1
I have a 6.4 that is raced in NHRA/NMCA Stock Eliminator. I am using a Holley Dominator system on the car. 2019 1320 Challenger. I use a leaded race gas (Renagade 116). What has anyone experienced with ignition timing? I use 26 - 27 degrees total above 6000rpm, generally finish line rpm about 7600-7700. I have been told that is max timing to use because of detonation above 27*. Anyone run 28 to 30* of timing and did you pick anything up? Thanks, Dyno

How did you do the Holley system & not get the factory functions of the car messed up, I have been trying to find a set up that will have wide band o2 fuel control & tuning on my 2020 T/a 392 ?


Race car only. None of the factory computers are used.


Thank you for the reply !!!! what class in stock do these cars fit in ?

Last edited by csk; 09/23/22 06:06 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392

Re: Timing on Race Gas for 6.4 [Re: csk] #3080264
09/24/22 01:06 PM
09/24/22 01:06 PM
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Dyno1 Offline OP
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The car fits in A/SA. Best ET/MPH is 9.92 @133. Minimum weight of 3470 lbs.

Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3080831
09/26/22 01:33 PM
09/26/22 01:33 PM
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Originally Posted by Dyno1
The car fits in A/SA. Best ET/MPH is 9.92 @133. Minimum weight of 3470 lbs.
up bow


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Timing on Race Gas for 6.4 [Re: Dyno1] #3080878
09/26/22 04:03 PM
09/26/22 04:03 PM
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Pattison Texas
csk Offline
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Originally Posted by Dyno1
The car fits in A/SA. Best ET/MPH is 9.92 @133. Minimum weight of 3470 lbs.


WOW !!!!! Thank you !!!!!!


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392







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