Hey guys. Just wondering. But to all the gassed up 6's out there, how much timing are you pulling out for what amount of hp putting in.. If that makes sense.. Also does any one tune on a air fuel ratio gauge, if so where's a good place to start or is it best to just see what the plugs are doing..
Any info appreciated..
Holden 6 on nitrous..
Started by
_NYS 71_
, Feb 24 2014 05:23 PM
18 replies to this topic
#2
SA EH
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Posted 24 February 2014 - 09:59 PM
Hey bud, 20 degrees retarded for 100hp of gas.
I was told that should be plenty when having my engine tuned, having said that it's as much as the crane retard box lets it go to. I'm not sure what the effect of a setting of, say, 15 degrees would have on the tune but I'm about to find out...
I have just installed an Innovate digital air fuel gauge to tune by so not to worry about what the plugs are doing. I'm thinking of just keeping the mixture setting at around the 12.7 mark, but keeping it on the richer side to save the engine. Will keep you posted, I should be tuning in the next week or two. Cheers.
I was told that should be plenty when having my engine tuned, having said that it's as much as the crane retard box lets it go to. I'm not sure what the effect of a setting of, say, 15 degrees would have on the tune but I'm about to find out...
I have just installed an Innovate digital air fuel gauge to tune by so not to worry about what the plugs are doing. I'm thinking of just keeping the mixture setting at around the 12.7 mark, but keeping it on the richer side to save the engine. Will keep you posted, I should be tuning in the next week or two. Cheers.
#3
Oversteer
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Posted 24 February 2014 - 11:03 PM
you mean 2 shirley !?
1-2 degrees per 50hp is something that rings a bell..
Edited by Oversteer, 24 February 2014 - 11:03 PM.
#4
madtoranajzedded
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Posted 24 February 2014 - 11:57 PM
yep what he said,2 degree for every 50hp
#5
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Posted 25 February 2014 - 06:22 AM
Alrighty then... Got that wrong!
We had it on 12 degrees last engine combo which worked spot on. This build with more comp/cam/headwork, tried the same & had nothing but dramas. Maybe I'll go with what you guys reckon then.
We had it on 12 degrees last engine combo which worked spot on. This build with more comp/cam/headwork, tried the same & had nothing but dramas. Maybe I'll go with what you guys reckon then.
#6
warrenm
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Posted 25 February 2014 - 07:18 AM
Hey bud, 20 degrees retarded for 100hp of gas.
I was told that should be plenty when having my engine tuned, having said that it's as much as the crane retard box lets it go to. I'm not sure what the effect of a setting of, say, 15 degrees would have on the tune but I'm about to find out...
I have just installed an Innovate digital air fuel gauge to tune by so not to worry about what the plugs are doing. I'm thinking of just keeping the mixture setting at around the 12.7 mark, but keeping it on the richer side to save the engine. Will keep you posted, I should be tuning in the next week or two. Cheers.
12.6-13.1 AFR is fine for a N/A engine, but I would be aiming for 11.5 -12 if you are giving it a spray.
#7
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Posted 25 February 2014 - 09:51 AM
Can't beat experience, cheers waz.
Should be interesting...
Should be interesting...
#8
_ChevLX_77_
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Posted 25 February 2014 - 07:41 PM
My last one had four taken off it for a 100 shot. ended up with 28 degrees total
#9
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Posted 25 February 2014 - 10:11 PM
So would you reckon if you had the retard set at 12 - 15 you would get massive pre-ignition & misfiring like it was over-fuelling??
#10
Oversteer
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Posted 25 February 2014 - 11:52 PM
Yes.
Retard raises egt and causes det....not to mention kills power >
#11
N/A-PWR
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Posted 26 February 2014 - 12:03 AM
Nice, seen two Torana's Drag the Quarter using NOS, and one was a 192 Triple Weber vs a 208, 500 Holley, Weber won bye a Torana length. Dave I
#12
Oversteer
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Posted 26 February 2014 - 01:09 AM
Yes.
Retard raises egt and causes det....not to mention kills power >
Should read- Excessive retard sorry
also make mix rich/overfuel because of late ignition..
#13
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Posted 26 February 2014 - 06:02 AM
Spot on Oversteer, exactly what I've got going on.
Ill start my tuning down at 4 degrees retarded then.
Good work lads.
Ill start my tuning down at 4 degrees retarded then.
Good work lads.
#14
warrenm
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Posted 26 February 2014 - 07:10 AM
How much total timing do you have? (before any retard)
#15
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Posted 26 February 2014 - 11:32 AM
Think it was 26, but ill double check.
#16
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Posted 26 February 2014 - 05:29 PM
Make that 24 warren.
#17
_ChevLX_77_
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Posted 27 February 2014 - 08:16 PM
Myn went 10.4 at 128mph with a 100 shot
#18
_NYS 71_
_NYS 71_
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Posted 27 February 2014 - 08:34 PM
Myn went 10.4 at 128mph with a 100 shot
thats quick.. if ya didnt mind could you shed some light on your combo.. just trying to make a small comparison to mine as ive just started playing around with nitrous. i pulled out 3 degrees to 29 and put in 50 shot. went well but was rich running 10.5 afr. just wasnt sure if i pulled too much timing out or not enough..
#19
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Posted 27 February 2014 - 10:34 PM
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