Detonation all of the sudden
Thread Starter
Staging Lane
Joined: Aug 2013
Posts: 59
Likes: 2
Detonation all of the sudden C6 Cammed vette. Bought it about a year ago with the nitrous installed. Recently I switched to E85 and car was tuned with hptuners for an N/A tune and a
nitrous tune. Everything went fine at the dyno, 563whp on the jug, Ran a few times it seemed ok, 57n 35f through a plate. 450lph pump, 1200cc injectors.
Fast Forward to 2 days ago I went to do some test hits on nitrous and there’s a noise like marbles in a can which tuner told me it’s def Detonation, I even tried to use a smaller size nitrous jet 52n leaving the 35f in there and still detonating when I stab it. What could it be the issue..??
nitrous tune. Everything went fine at the dyno, 563whp on the jug, Ran a few times it seemed ok, 57n 35f through a plate. 450lph pump, 1200cc injectors.
Fast Forward to 2 days ago I went to do some test hits on nitrous and there’s a noise like marbles in a can which tuner told me it’s def Detonation, I even tried to use a smaller size nitrous jet 52n leaving the 35f in there and still detonating when I stab it. What could it be the issue..??
Teching In
Joined: Jan 2020
Posts: 22
Likes: 1
From: Los Angeles
What plugs are you running currently ?
Would that be the first time you spray on the street ?
Do you know how many degrees of timing your on while on spray ?
You def need you be checking plugs on spray.
Would that be the first time you spray on the street ?
Do you know how many degrees of timing your on while on spray ?
You def need you be checking plugs on spray.
Thread Starter
Staging Lane
Joined: Aug 2013
Posts: 59
Likes: 2
box went bad, I’ll prob go down to a 50 since that small of a shot shouldn’t really have an effect and see if stops det..
Thread Starter
Staging Lane
Joined: Aug 2013
Posts: 59
Likes: 2
What plugs are you running currently ? Tr6
Would that be the first time you spray on the street ?
No, Car was on a 200 shot, 150 etc. countless times
Do you know how many degrees of timing your on while on spray ? 24 deg [E85]
You def need you be checking plugs on spray.
i do
Would that be the first time you spray on the street ?
No, Car was on a 200 shot, 150 etc. countless times
Do you know how many degrees of timing your on while on spray ? 24 deg [E85]
You def need you be checking plugs on spray.
i do
Thread Starter
Staging Lane
Joined: Aug 2013
Posts: 59
Likes: 2
One thing I noticed, With the bottle off and
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
Teching In
Joined: Jan 2020
Posts: 22
Likes: 1
From: Los Angeles
One thing I noticed, With the bottle off and
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
2)pull every plug to examine if it’s detonation or pre ignition
3) if they look fineTry that 50 shot and see if detonation happens again.
4) I’d think those a/f are rich.
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TECH Fanatic
Joined: Mar 2014
Posts: 1,266
Likes: 165
One thing I noticed, With the bottle off and
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
just spraying fuel, the afr’s only went from 12.5 afr’s (that’s the norm for N/A) to like 11.2-10.6. I would think with a 35f jet the widenand would be reading way over rich. So maybe just
maybe the fuel noid doesn’t like E85 and had enough???? Same solenoid was used for 2 years on 93 octane with no issues...
both noids are ColdFusion brands
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