the Official "NA Tuning" thread
Joined: May 2004
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From: DFW, TX
Originally Posted by versionJDM,Nov 22 2005, 08:10 PM
i just looked at my dyno plot....my 213rwhp was at 12.1 AFR.......? please explain to me. shit, should i even mess with that. if the car is doing that stock.........???????????
What you have been thinking of are the af ratios for a turbo car. With FI you typically need to run richer ratios due to hotter CHT's and just the fact that the engine is working a lot harder. More fuel will help cool the engine down as well as reduce the risk of detonation...hence why turbo/fi cars run 11.0:1 - 11.5:1 ratios. N/A guys can go as lean as 13.5:1...and sometimes leaner, as I mentioned.
And s2000Nvegas
just stop posting here, this is a realistic thread, we don't care about your butt dyno ideas or anything so just stop. We are actually knowledgable enough to know how to make real power.
Joined: Sep 2004
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From: PNW
I don't know the exact AFR with a Mugen ECU, but I know it leans it out towards 13.5:1 at several points in the RPM range. It's BEST with a Mugen I/H/E setup. With a VAFC, you can get the AFR best to YOUR specific mods (which will likely be SIMILAR to Mugen ECU at many points).
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Joined: Aug 2003
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From: Lusby, MD
Originally Posted by S2oooNvegas,Nov 23 2005, 03:59 AM
been away for a while.
dude, ......
i know all this. i do this all day, everyday, for a living. i wouldnt give advice if i hadnt seen it myself, day in and say out. computers learn, and they have memory, they get stuck in a one track mind. thats why its good to reset them now and again. ever worked on an s2k, that an old lady drives, or older gent?. they say, it runs ok, but it never has any power. because its used to them never hitting VTEC, and always driving under half throttle. it is lazy fuel and spark curve wise. take it out for a drive, and smash on it, and look in the rearview. smoke and soot pouring out. they get back in, and its crisp as new, they freak out, and pull back on the service drive, and go WTF!!. my car runs so nice now.
yes long term fuel trims are used to being in one place. so you bolt on parts, and it takes a few for the car to edge the trims, and go, yeah, its safe...lil more, still safe, lil more...wow!!! we have new air.
listen, if you have an s2k, do this for me. everyone.
check your oil, if its overfull, drain out some, im not joking. now get in your car, and drive up the street, find a good back road. stand on it HARD, and run from 1st, through 4th, remember how it feels. slow down, do it again, HARD. remember how it feels. keep doing this. about 5-6 times. now drive up the road a ways, and let the car get some fresh air.... maybe 2 mins drive time. now put it back in first and STAND ON IT, wind out 4 gears, youll go WTF!!!!! car hauls ass. noticeable difference. the trims have learned, you arent messing around. and everything is warmed up now. fluids have thinned out, etc.
i drive my car very very hard. before we go hunting, we go burn the cars in. get em lit up. and people always say, man i notice your car runs extra hard. yeah, cause i know what the car wants. if i drive for 3 days, to work and back, no VTEC, then go get on it, im dissapointed, BAD. rip it for 15 mins or so, and its back to its old self. try it, and pay attention. youll love it, and win more races that way.
take it easy.
dave
Also, the soot and black smoke you see in grandmas car is built up carbon that never got blown out due to low velocity exhaust flow at a constant rate.
I'm not going to pretend to be an ECU guru, but I seriously doubt your ECU will generate a better fuel and timing curve in a matter of 20 minutes of hard driving. I could be wrong and that would be cool.
P.S. I drive my car hard pretty often. Vtec atleast 10 times crusising through town on a 5 mile hike.
Thread Starter
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Joined: Jul 2005
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From: formerly versionJDM
spoon ecu, header, and exhaust=220rwhp?
vfac,spoon header and exhaust=220whp?
i am this close to buying a vfac from my good bud wyatt, i just need some more assurance of...power...ease of tuning.
vfac,spoon header and exhaust=220whp?
i am this close to buying a vfac from my good bud wyatt, i just need some more assurance of...power...ease of tuning.
Joined: Sep 2004
Posts: 8,106
Likes: 2
From: PNW
Well, I can assure 1 thing: You can adjust AFR with the VAFC to match the Spoon ECU. You CANNOT adjust timing, or anything else, though.
If you get a spoon snorkel or AUT cooling plate, with your Spoon header and exhaust, the Spoon ECU will be "calibrated" to your mods, so no need to customize with the VAFC. I am playing both sides. VAFC is cheaper, but tuning prices and ease range so much... Whatever you decide to get, youll be happy with.
If you get a spoon snorkel or AUT cooling plate, with your Spoon header and exhaust, the Spoon ECU will be "calibrated" to your mods, so no need to customize with the VAFC. I am playing both sides. VAFC is cheaper, but tuning prices and ease range so much... Whatever you decide to get, youll be happy with.
Then you'll be dancing all night...
Joined: Sep 2003
Posts: 3,361
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From: las vegas
Originally Posted by Silver9k,Nov 23 2005, 04:55 AM
yes...the stock S2k runs right around there at 12. Typically we are able to lean it out to 13.0:1 and even 13.5:1 sometimes even leaner depending on the car. I believe the Mugen ECU goes as lean as 13.5:1. So yes a little leaning is good.
What you have been thinking of are the af ratios for a turbo car. With FI you typically need to run richer ratios due to hotter CHT's and just the fact that the engine is working a lot harder. More fuel will help cool the engine down as well as reduce the risk of detonation...hence why turbo/fi cars run 11.0:1 - 11.5:1 ratios. N/A guys can go as lean as 13.5:1...and sometimes leaner, as I mentioned.
And s2000Nvegas just stop posting here, this is a realistic thread, we don't care about your butt dyno ideas or anything so just stop. We are actually knowledgable enough to know how to make real power.
What you have been thinking of are the af ratios for a turbo car. With FI you typically need to run richer ratios due to hotter CHT's and just the fact that the engine is working a lot harder. More fuel will help cool the engine down as well as reduce the risk of detonation...hence why turbo/fi cars run 11.0:1 - 11.5:1 ratios. N/A guys can go as lean as 13.5:1...and sometimes leaner, as I mentioned.
And s2000Nvegas
just stop posting here, this is a realistic thread, we don't care about your butt dyno ideas or anything so just stop. We are actually knowledgable enough to know how to make real power.