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Best way to dyno an auto? #181067 May 19, 10:29am May 19, 10:29am
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Best way to dyno an auto?
I know that in most cases, manuals dyno in third gear for the most accurate hp/torque curve. What would I do for an auto? We just got a new shop with a dyno and me and a couple buddies were thinking of rolling down to check it out, and I want to dyno my 02 GT for shits and giggles. Do I leave it in 2nd, 3rd w/o Overdrive or what?


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Re: Best way to dyno an auto? [Re: CRBN BLU] #181068 May 19, 4:28pm May 19, 4:28pm
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I was watching Two Guys Garage this afternoon, and they dynoed a Ford F250 Super Duty automatic. While on the dyno, they ran it in 3rd with the torque converter locked up. How do I lock up the torque converter?


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Re: Best way to dyno an auto? [Re: CRBN BLU] #181069 May 19, 8:42pm May 19, 8:42pm
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Ok, answered my own question, at least one of them. Here's one someone might know: Which fuse deals with the transmission/drivetrain etc.?


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Re: Best way to dyno an auto? [Re: CRBN BLU] #181070 May 19, 11:56pm May 19, 11:56pm
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Do not do lock up the torque converter. The auto celica is a four speed right? that means the best gear to dyno it in is 2nd. I think the F250 is a 5 speed Auto thats why they left it in 3rd. Do not use overdrive it will fuck up all the readings cause it adapts to the pressure put on the wheels and you will get weird reading. Afriend of mine threw it into OD and on the 1st run got 98 then on the second run he got 175 without it he got a steady 125(99 Si).


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Re: Best way to dyno an auto? [Re: calidrifter] #181071 May 20, 12:47am May 20, 12:47am
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^^listen to the dyno expert thumbsup
serg how can you leave it in 2nd gear if its an auto???doesnt it shift automatically hence its an auto??? confused confused

we should have dynoed my car when i took off the kit and rims maybe next time smile

Re: Best way to dyno an auto? [Re: tru_Asiatik_Pride] #181072 May 20, 8:35am May 20, 8:35am
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dynos are hardly ever accurate anyway.

the only real accurate way to do it is to use the same exact dyno with the same exact dyno settings with the same exact car.

there are so many variables that it hurts to think of them all...that said, you can stay within about a 10-20 whp 'margin' between different cars and different dynos..but then again a 10-20 whp difference is a LOT.

Re: Best way to dyno an auto? [Re: tru_Asiatik_Pride] #181073 May 20, 10:23am May 20, 10:23am
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Originally Posted by tru_Asiatik_Pride
^^listen to the dyno expert thumbsup
serg how can you leave it in 2nd gear if its an auto???doesnt it shift automatically hence its an auto??? confused confused



you could just drop it to 2.

Re: Best way to dyno an auto? [Re: Deseck] #181074 May 20, 1:25pm May 20, 1:25pm
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i just dynoed my auto this past weekend and i think he did it in third...i wanted to cry though because it sucked puke . Peak hp of like 132 and 95 ft lb of torque. (i have a gts) it topped out at 122 in third gear...is that right?????

Re: Best way to dyno an auto? [Re: ricenit] #181075 May 20, 1:30pm May 20, 1:30pm
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yeah that sounds about right, I'm pretty sure.

Re: Best way to dyno an auto? [Re: RicePowered] #181076 May 20, 5:41pm May 20, 5:41pm
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where could I get a dyno done and how much would they usually cost?


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Re: Best way to dyno an auto? [Re: Deseck] #181077 May 22, 6:06pm May 22, 6:06pm
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I don't know about where you live, but here, it'll cost me $75 for 3 runs without any tuning in between.


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Re: Best way to dyno an auto? [Re: calidrifter] #181078 May 22, 6:56pm May 22, 6:56pm
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Originally Posted by calidrifter
Do not do lock up the torque converter. The auto celica is a four speed right? that means the best gear to dyno it in is 2nd. I think the F250 is a 5 speed Auto thats why they left it in 3rd. Do not use overdrive it will fuck up all the readings cause it adapts to the pressure put on the wheels and you will get weird reading. Afriend of mine threw it into OD and on the 1st run got 98 then on the second run he got 175 without it he got a steady 125(99 Si).


what he said is right.


but btw they never made a si in a auto alwasy 5 spd.


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Re: Best way to dyno an auto? [Re: Krayze] #181079 May 22, 10:46pm May 22, 10:46pm
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^^^thats what i thought too

Re: Best way to dyno an auto? [Re: darksidecelica] #181080 May 23, 5:21pm May 23, 5:21pm
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yep cost me 75 for three runs too smile

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