Del_Slowest

is the air/fuel ratio different when going from a dynojet to a mustang dyno. I read on here somewhere about it being different but i want to know how much. If nobody knows then i guess i'll just have to wideband on each one

Kwuaymaikrup

I don't think the dyno has anything to do with it rather the type of wideband being used. *shrug*

-Ryan

ndogg

i would say that it might be a little leaner on the mustang. i know my car is leaner on the street than it is on a dynojet... and a mustang is a closer approximation to the street?

Del_Slowest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ndogg &raquo;</TD></TR><TR><TD CLASS="quote">i would say that it might be a little leaner on the mustang. i know my car is leaner on the street than it is on a dynojet... and a mustang is a closer approximation to the street?</TD></TR></TABLE>


thats what i was hearing was that the Dynojet ran the car a lil richer because of not loading the drum. Is there anyone else with first hand experience, and if so do you remmeber how much of a point you were off

here's a pic

gritsak

its gonna run a little leaner..its also just going to vary from car to car...most people get an ave of running about a 1/2 point leaner on the street then on a dynojet..so im guessing that going from a dynojet to a mustang would yield around that or maybe a little less difference

b16_madman

i dunno but their hp differences for my car was 20hp

USDM 4G VTEC

just get it dynojet tuned benchracer

the mustang dyno aint going to be accurate for you!!

if so worried get DESKTOP DYNO 2000 and be done

Del_Slowest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">just get it dynojet tuned benchracer

the mustang dyno aint going to be accurate for you!!

if so worried get DESKTOP DYNO 2000 and be done </TD></TR></TABLE>

LOL, steve colleti , the ownver of colleti motorsports in centerville ohio, called me a benchracer b/c i said i'd rather dynotune on a mustang dyno rather than his dynojet b/c i heard that the afr was about a 1/3-1/2 of a point difference.

vtec.dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kwuaymaikrup &raquo;</TD></TR><TR><TD CLASS="quote">I don't think the dyno has anything to do with it rather the type of wideband being used. *shrug*

-Ryan</TD></TR></TABLE>

thats what i'm thinking

Bailhatch

So even if you get a solid afr on the dyno how do you guys know what is is on a different day/ temp/ humidity etc..?

Mine swings almost a point day to day so i have to run high tens sometimes

Del_Slowest

i like the spring b/c it's not super cold nor is it super hot. Should be a good time for dyno tuning. I didn't know that they can swing a whole point from day to day though.

Bailhatch

mine changes that much with no more then 30* of temp change. Apparantly uber/hondata can't compensate for atmospheric temp changes or something.

makes me wonder about these guys with $3000 motors with $3000 turbo kits on them that just get it tuned and leave it. Maybe my setup is extra lame for some reason but this seems liek aproblem that you don't read much about, or maybe I have something else wrong....

Enthalpy

if your car is changing 1 afr point with 30* temperature swings then you either have a bad Intake Air Temp Sensor...or your your tuner fucked up huge. You should not fluctuate more than a couple tenths of an AFR point based on temp. I have seen cars dyno in 50 deg weather and be only 1-2 tenths of AFR wise in 100 deg heat. when everything is working and it is properly tuned.

FwdCivicHatch

if your getting your car tuned, use the wideband the first time. compare those numbers with the dyno. then use the same dyno everytime you want to tune. it doesn't make sense to tune you car on different dynos.

and the only thing you should use the dyno for is to tune, the hp differences between differnt dynos is huge, and even the same dyno could yeild different hp results with the same exact setup on the day after.

Del_Slowest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FwdCivicHatch &raquo;</TD></TR><TR><TD CLASS="quote">if your getting your car tuned, use the wideband the first time. compare those numbers with the dyno. then use the same dyno everytime you want to tune. it doesn't make sense to tune you car on different dynos.

and the only thing you should use the dyno for is to tune, the hp differences between differnt dynos is huge, and even the same dyno could yeild different hp results with the same exact setup on the day after.</TD></TR></TABLE>


i'm talking about going from a dynotune to the street. which one is better for dynotuning, a mustang dyno or a dynojet

FwdCivicHatch

Well the A/F should be the same initially, meaning that both the machines have newer O2's. I've heard that after a period of time(not sure how long) they become inaccurate. If I were your I would use your own Wideband if you have it.

vtec.dc2

from what i know your car would run leaner on the street than it would on a dyno (maybe half point difference).. and it shouldn't matter what type of dyno they use, because its really up to the quality/condition of wideband.

my latest setup has not been dynotuned yet, i'm still running on cold winter maps, but it seems to run just fine so far, its not hot summer yet, but if its still going to run fine, i'll just use it all year long. imo, its best to have one for winter, one for summer.

Mase

the car should not fluctuate more than a tenth of a point or so between the dyno and the street.

any differences with AFR's between different dynos are probably due to the different wideband meters..

ndogg

so why does mine swing by .5 ? i'm using the same wideband. tune it on the dyno to 12:1... pull off the dyno to drive home and its 12.5:1.

Mase

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ndogg &raquo;</TD></TR><TR><TD CLASS="quote">so why does mine swing by .5 ? i'm using the same wideband. tune it on the dyno to 12:1... pull off the dyno to drive home and its 12.5:1.</TD></TR></TABLE>

by the looks of your sig, it says youre using uberdata.

god knows why ur afr changes that much, but i know the cars i tune, they dont change that much.