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| 4.9 e85 dyno (Page 4/4) |
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lou_dias
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JUN 29, 03:01 PM
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Burned a new chip yesterday with supposedly 25% more fuel... Throttle response feels better. Might have to hold off for a dyno for a couple of weeks as I'm working on a solar trailer project right now.
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dear1700
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JUN 30, 01:15 AM
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Ever tried running a wide band to see the actual afr?
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lou_dias
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JUN 30, 08:46 AM
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| quote | Originally posted by dear1700:
Ever tried running a wide band to see the actual afr? |
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That's a little useful for logging when ordering "internet" tunes but for the cost it's about 4 hours of dyno time. I'd much rather have the dyno time and then never need the wideband again.
I tune for performance not for the # a book or person has it in their heads they have to target for AFR. The only reason to run a little rich below WOT is so when you increase throttle there's already fuel there to give you more power. At WOT, there's no more pedal increases coming so I have no problem tuning for 14+:1 AFR at WOT...or whatever # makes more power.
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pmbrunelle
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JUN 30, 08:55 AM
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| quote | Originally posted by lou_dias:
the # a book or person has it in their heads they have to target for AFR |
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You have a target number to follow, it's 14+ as you said. You found it on the dyno, so it's a good target for you.
The wideband gauge will let you know if anything changed since the dyno day, or if something is up with your car.
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lou_dias
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JUN 30, 09:59 AM
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| quote | Originally posted by pmbrunelle:
You have a target number to follow, it's 14+ as you said. You found it on the dyno, so it's a good target for you.
The wideband gauge will let you know if anything changed since the dyno day, or if something is up with your car. |
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LOL while true, I'm not going to tune daily based on the weather nor go on a cross-country road trip in a Fiero where I'll be seeing radical elevation changes. When I'd done tuning - done is done.
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lou_dias
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JUL 03, 07:23 PM
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196/298[This message has been edited by lou_dias (edited 07-03-2020).]
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pmbrunelle
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JUL 03, 11:54 PM
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I guess as long as you always use the same wheels when you go to the dyno, then the hp loss doesn't really matter; you'll still be able to track the progress of your modifications.
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lou_dias
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JUL 04, 12:26 AM
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| quote | Originally posted by pmbrunelle:
I guess as long as you always use the same wheels when you go to the dyno, then the hp loss doesn't really matter; you'll still be able to track the progress of your modifications. |
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Yea I know, but I guess I'm just making the point that if I had stock wheels, this thing would be >200/>300 at the wheels which is pretty good for a 4.9 ... My buddy's IROC at the beginning of the video has Vortech heads, 1.6 rockers and a few other mods put down 233/330 but he has an auto.
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One thing I did learn is the stock Fiero airbox is only good for about 190 rwhp. Once we bypassed that the hp and torque jumped +5 at peak but even higher >4200rpm...but that was past peak already.
Also this Fiero Factory cross-over is pretty small in diameter. Could probably gain some more power with a true dual exhaust...[This message has been edited by lou_dias (edited 07-04-2020).]
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