DYNO Testing???

[LMNFCTR]

What gear (8 speed Auto) are you testing the Supra in? I realize 1:1 is the standard, but 6th gear seems awfully high (top speed wise). Thanks in advance.

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[jRuN]

Just got mine dyno'd last week and they did it in 6th gear.. I think he said he saw 165mph in the dash

 

[razorlab]

8 speed auto, using the OEM tire diameter of 26.6":

6th gear (1:1 ratio)
5500 = 138mph
6000 = 150mph
6500 = 163mph
7000 = 175mph

 

[Kujiwara]

It doesn't really matter as long as you know the gear ratio and input that into the dyno computer as well as final drive and wheel diameter. They typically used 1:1 ish gearbox ratio because it allows the car to take some time to build up the rpms and get higher resolution over the rev range. But since final drive varies quite a bit between cars you don't need it to be that close to 1:1, it's more important you use a long enough gear without exceeding your tire's speed limit rating. Also FYI, based on my experience, runs that take longer to build revs (aka higher gears), tend to read higher torque numbers at lower rpms especially (larger) turbod engines since it gives them more time to build up boost, this shows the absolute max you can make with the engine (but you may not see this much torque irl in lower gears).

 

[Benjilis]

It doesn't really matter as long as you know the gear ratio and input that into the dyno computer as well as final drive and wheel diameter. They typically used 1:1 ish gearbox ratio because it allows the car to take some time to build up the rpms and get higher resolution over the rev range. But since final drive varies quite a bit between cars you don't need it to be that close to 1:1, it's more important you use a long enough gear without exceeding your tire's speed limit rating. Also FYI, based on my experience, runs that take longer to build revs (aka higher gears), tend to read higher torque numbers at lower rpms especially (larger) turbod engines since it gives them more time to build up boost, this shows the absolute max you can make with the engine (but you may not see this much torque irl in lower gears).

People like you are annoying and unhelpful

 

[Kujiwara]

People like you are annoying and unhelpful

What?? I'm literally informing OP as much as I could about why some tuners do what they do and how it can be flexible.

 

[Rocses]

@Kujiwara he means aka dumb it down a little

 

[suicidaleggroll]

@Kujiwara he means aka dumb it down a little

Why? It's written perfectly fine and at a level that any car enthusiast should either already understand or be able to understand with minimal research.

 

[Rocses]

@suicidaleggroll ask @Benjilis

 

[Mr. Jonathan]

Why? It's written perfectly fine and at a level that any car enthusiast should either already understand or be able to understand with minimal research.

Don’t know anything about dyno and I followed it. 1-5 to short. 7&8 are basically over drive.

 

[Rocses]

@zrk finish this

 

[Moorman]

People like you are annoying and unhelpful

Both insightful and informative; I'm sure the poster will make the noted changes in the future.

 

[Moorman]

I don't know anything about cars, or the methods pertaining to them. Please spoon feed me (pre-chewed) so that I might digest whatever you're saying without thought.

 

[Moorman]

Also... tequila.

 

[PASupra85]

Also... tequila.

Don’t forget the lime! Tbh I learned a Liltte something today, thanks @Kujiwara , well written.

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