Chassis dyno

[metalstorm]

I was wondering how many of you have used a chassis dyno,You likes,dislikes on your experience.I have been one 1 before but they did not want be to rejet my carbs so I used the pulls to check other information.I hope to get to a local dyno if I can't get to the track with the unstable weather.

 

[george68hemirr]

A dyno is a tuning tool.....the track is the real results.....we did some pulls at car shows......one after the other....a water dyno which is supposed to be a certain temp....which gave false readings

 

[4spd69RR]

Never have but thought about it several times.

 

[metalstorm]

I can relate to a happy dyno/false readings!

 

[Big John]

I've seen the car show dynos and I'm not impressed... In fact they look like a receipt for a disastrous wreck with the car launching off into the crowd. I watch from a distance.

 

[inri]

I can relate to a happy dyno/false readings!

I've read that manual transmissions oftentimes perform better on dynos, generally speaking, but autos perform better at the track.

 

[metalstorm]

I know there is a lot of discussion on converter slip fudging the #'s.The guy I went to would not drive my car on a pull on the dyno and he let me operate the car.I think he was afraid of the trans going boom.

 

[george68hemirr]

I did 2 separate pulls at car shows.....3 pulls each.....75-100 bucks......he wouldn't let me behind the wheel.....i guess for insurance purposes......plus what big john said.....shit could happen

 

[metalstorm]

Can I ask the results of those pulls?[just for fun]

 

[inri]

Careful with those car show dynos, as I've seen on youtube a few of them go KABLAM. Some aren't made for serious high hp.

 

[george68hemirr]

can i ask the results of those pulls?[just for fun]

it was 600hp at the rears wheels both times.....but the track proved different.....735 hp with my numbers

 

[metalstorm]

Very nice and at least you went better that the dyno where mine went the other.The dyno read out 1050hp[engine w/346 iron heads]] and the track was around 700hp with 3900# going 10.14/136 but I am not looking for excuses just saying.I want to dyno to check for reversion I had if I can't get to the track.For fun also here is the video.
https://www.youtube.com/watch?v=deuuTcazgrU

 

[inri]

Very nice and at least you went better that the dyno where mine went the other.The dyno read out 1050hp[engine w/346 iron heads]] and the track was around 700hp with 3900# going 10.14/136 but I am not looking for excuses just saying.I want to dyno to check for reversion I had if I can't get to the track.For fun also here is the video.
https://www.youtube.com/watch?v=deuuTcazgrU

I think dynos are a great way to dial in your cars engine/power. As for what the readout says regarding hp & tq... ...as George said before the "track" tells the true numbers.

 

[metalstorm]

^Agreed!You can't reproduce the air scoop effect also so many times there is more tunning at the track after the dyno.

 

[69hemibeep]

:nachos:

 

[george68hemirr]

Very nice and at least you went better that the dyno where mine went the other.The dyno read out 1050hp[engine w/346 iron heads]] and the track was around 700hp with 3900# going 10.14/136 but I am not looking for excuses just saying.I want to dyno to check for reversion I had if I can't get to the track.For fun also here is the video.
https://www.youtube.com/watch?v=deuuTcazgrU

you should be losing around 120hp thru the drive train....so with that said you should have 930hp at the rear wheels.....very impressive

 

[metalstorm]

you should be losing around 120hp thru the drive train....so with that said you should have 930hp at the rear wheels.....very impressive

Impressive only if it were true results,like you said the track results are the real #'s.Once I get the carbs running good after adding aluminum heads I can make other adjustments.The dyno will help get some results that I can use to adjust the carb.

 

[Tempest 455]

Yep ditto on the track. You can calculate pretty close to actual HP based on MPH/weight.

 

[zupanj]

I had mine on a dyno twice, once before with the 383 and once after with the hemi. This was done in a shop not a car show. The dyno was used to optimize the tune on the engine and was pretty useful. When I put the hemi in the car and they did a few pulls the guy said he planned about 4 hours of jet changing but the A/F ratio was spot on. The engine was built by a good group in Ohio and it was tuned on an engine stand before I received it.

For what it's worth I also had my 427 Cobra on the same dyno some time ago too. I thought the engine was not putting out the power I expected. Turns out the dyno said it was, I guess I was just used to driving it. I have given a lot of people rides in the car since and the looks on their faces say it's not underpowered.

 

[metalstorm]

I am going to a local chassis dyno on friday at HMF in Cleveland,O so I am very excited.