B18C Recommended Timing retard question
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B18C Recommended Timing retard question
[edit]
Can a mod move this to the Engine/Tuning forum please, thanks.
[/edit]
Setup is:
EJ8
Bone stock B18C with ARP head studs and a block guard
Garrett T3/t04e 60/.63
2.5" charge pipes
Tial 38mm
HKS SSQ bov
precision 350 hp FMIC
AEM fuel pressure regulator
Chipped P28 on Crome
full-race 3" DP to 2.5" exhaust
Vibrant flat black 2.5" muffler
Precision 1000 cc injectors
Current manifold: Peakboost ramhorn (cracking, warped headflange)
Upcoming manifold: Go-autoworks mini-ram (for better spool time with minimal power loss)
NGK plug wires
NGK platinum 7's gapped at 0.028
I currently have the ignition timing retarded by 1 degree. I run 93 octane at 10 PSI all day.
Even before the manifold started having issues, the car has never idled properly. I never had that issue when I was NA. I have seen people run similar injectors, and bigger injectors, who were able to get a stable idle and no detonation. From what I've searched, a timing retard of 1 degree is optimal for my setup, though I've never really been 100% positive? The car has been running very well, aside from leaning out due to recent manifold leaks which will be fixed within the next couple weeks (whenever the weather warms up a bit for a couple days).
My question is this; Is the only way to really find optimal and most reliable ignition timing application specific (meaning, should I just be adjusting and tuning as I adjust), or is it pretty much a universal spec per engine model and boost level?
I just want to get rid of the rough idle and minor detonation associated with it, as much as possible. I have seen many other turbo'd Hondas with similar setups that idle perfectly normal.
Sorry if my questions are noobish, but I'm not an expert.
Can a mod move this to the Engine/Tuning forum please, thanks.
[/edit]
Setup is:
EJ8
Bone stock B18C with ARP head studs and a block guard
Garrett T3/t04e 60/.63
2.5" charge pipes
Tial 38mm
HKS SSQ bov
precision 350 hp FMIC
AEM fuel pressure regulator
Chipped P28 on Crome
full-race 3" DP to 2.5" exhaust
Vibrant flat black 2.5" muffler
Precision 1000 cc injectors
Current manifold: Peakboost ramhorn (cracking, warped headflange)
Upcoming manifold: Go-autoworks mini-ram (for better spool time with minimal power loss)
NGK plug wires
NGK platinum 7's gapped at 0.028
I currently have the ignition timing retarded by 1 degree. I run 93 octane at 10 PSI all day.
Even before the manifold started having issues, the car has never idled properly. I never had that issue when I was NA. I have seen people run similar injectors, and bigger injectors, who were able to get a stable idle and no detonation. From what I've searched, a timing retard of 1 degree is optimal for my setup, though I've never really been 100% positive? The car has been running very well, aside from leaning out due to recent manifold leaks which will be fixed within the next couple weeks (whenever the weather warms up a bit for a couple days).
My question is this; Is the only way to really find optimal and most reliable ignition timing application specific (meaning, should I just be adjusting and tuning as I adjust), or is it pretty much a universal spec per engine model and boost level?
I just want to get rid of the rough idle and minor detonation associated with it, as much as possible. I have seen many other turbo'd Hondas with similar setups that idle perfectly normal.
Sorry if my questions are noobish, but I'm not an expert.
Last edited by 8YourV8; 01-03-2011 at 11:02 AM.
#3
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Re: B18C Recommended Timing retard question
its hard to say without really tuning the car on the dyno...
id say from my past experience you should be somewhere around 20 degrees total timing give or take a little from the info you have stated
id say from my past experience you should be somewhere around 20 degrees total timing give or take a little from the info you have stated
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Re: B18C Recommended Timing retard question
Again, forgive the noobishness, but I am still learning myself after 3 years of building and driving a turbo'd Honda.
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Re: B18C Recommended Timing retard question
pulling 1 deg per psi will have nothing to do with your idle problems, it does not start to pull timing until you hit boost. Did you get the car tuned or are you on a basemap? Whats your afr at idle?
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Re: B18C Recommended Timing retard question
a lot of times with crome, i've noticed that the afr's at idle need to be in the 12:1 range to get it to idle properly. I'm not sure if this applies to your situation or not but just figured i'd toss it out there.
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#9
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Re: B18C Recommended Timing retard question
My AFRs, I don't know off the top of my head. It's been a while since I've looked at the data logs from the last tune I got. Once that new manifold goes on I'm getting another tune done anyway, I'll post the new numbers and updates when that happens to see if it changes anything.
The car was tuned about 1 hour on the dyno and another hour on the street, over three years ago.
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