How important is a tune...
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Joined: Dec 2007
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From: 310/213
+1 Hero's advice..
when i first installed my J's header and J's 70RR i dyno'd like a week later and it was some wat ok.. and 3 month later, last week i dyno'd with J's intake added and AFR was 14.5~15 at lower RPM and 6k when vtec kicks in..
tuner couldnt really do much with my vafc2 as u cant add fuel with this.. so im gonna sell it and get emanage...
moral is yes tune is VERY important
when i first installed my J's header and J's 70RR i dyno'd like a week later and it was some wat ok.. and 3 month later, last week i dyno'd with J's intake added and AFR was 14.5~15 at lower RPM and 6k when vtec kicks in..
tuner couldnt really do much with my vafc2 as u cant add fuel with this.. so im gonna sell it and get emanage...
moral is yes tune is VERY important
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From: Lawrenceville, GA
Originally Posted by Terror,Sep 7 2009, 09:34 PM
In my eyes, a safe A/F is anything above 11.5 and below 13.2-13.5.
If you get your car tuned in the future, try for a 13.2 or around there. I've seen cars make power at 13.5, but that is too lean in my opinion.
If you get your car tuned in the future, try for a 13.2 or around there. I've seen cars make power at 13.5, but that is too lean in my opinion.
lol wtf.
11.5-13.5AFR on a NA motor with bolt ons?
are you fkin me.
14.7 is stoich
you want to be stoich all around and richen up maybe the vtec points.
I don't understand where you got 11.5-13.5 is good.
that 12.8-13.2 afr might be good for NA but that is a really lean afr for a turbo car running pump gas. I'm not sure on a turbo car on pump I'd push it much past 12.0 afr.
12.8 is not lean even for a turbocharged car.
you'd push past 12.0 on a turbocharged car? what? 10.0afr constant?
wash out your rings and spin some bearings while you're at it?
btw, this is with my experience with both NA and turbocharged 240sx with tuning a standalone megasquirt system myself.
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From: Clifton, NJ
babowc.....
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
Joined: Sep 2005
Posts: 3,368
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From: Aliso Viejo
Originally Posted by devs2k,Sep 29 2009, 10:05 AM
babowc.....
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
i will not leave my car running at 14.7 afr. that's too high for me.
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My experience thus far:
I bolted on the Ti-C, 70mm TP, and "Private Label" header and am monitoring AFRs with a Uego. I'm currently running mid-12 AFRs at WOT throughout the revs. Cruising around town I'm closer to stoich and run a few tenths rich/lean.
Obviously I'm in a MY00 so I was running rich in the first place. This doesn't apply to Fish22's setup. I just thought I'd share some first-hand experience w/o a tune.
Fish - I'm no expert, but I don't think you'd fry anything without a lot of abuse. You'd probably be looking at premature wear as well as the under-utilization of modifications.
I bolted on the Ti-C, 70mm TP, and "Private Label" header and am monitoring AFRs with a Uego. I'm currently running mid-12 AFRs at WOT throughout the revs. Cruising around town I'm closer to stoich and run a few tenths rich/lean.
Obviously I'm in a MY00 so I was running rich in the first place. This doesn't apply to Fish22's setup. I just thought I'd share some first-hand experience w/o a tune.
Fish - I'm no expert, but I don't think you'd fry anything without a lot of abuse. You'd probably be looking at premature wear as well as the under-utilization of modifications.
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From: Lawrenceville, GA
Originally Posted by devs2k,Sep 29 2009, 02:05 PM
babowc.....
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
Every single tuner not only in the history of the s2ki/S2000 community but any knowledge tuner will unanimously disagree with you.
You don't want to be at the stoich point for WOT/open loop. 14.7 is just for closed loop/partial throttle/cruising. Even the stock factory tune operates within the ranges Terror described. This is just pure fact.
I don't know anything about tuning an 240x, but I know you cannot make a generalization just because you happen to have some experience tuning yourself. Just because you tuned it yourself does not make it right.
12.8 isn't lean for a turbo car? Where are you getting this from? I'm glad you are not posting this on the Forced Induction forum because they'd chew you out in a matter of seconds.
Please don't post your misinformation here; it is really bad advice.
I'm referring to the post referring to staying within 11.0-13.5AFR.
14.7 is stoich, universally.
I'm speaking of crusing and idling, little to no load.
I don't think I ever mentioned stoich in WOT, I specifically said "stoich and you'd need to richen up where necessary", not run the mentioned AFR at idle or crusing and it wasn't specified. Who tunes for 11-13.5afr no load?
12.8 is lean? under what condition? WOT again?
of course 12.8 is lean under WOT! it's obvious you'd need to richen up under load, for any motor. I suppose with F22/F20 motor having such high compression would need more fuel after turbocharging also.
My apologies if I came off the wrong foot.