Well, I'm about ready to take my 489 to a dyno somewhere and have it tested and tuned to hopefully find some more power/make sure everything is set up right. I've never been to one before, so I want to know what kind of things I should look for, ask up front, expect, etc..? Also how much $ should I expect to pay? Anything to beware of? Thanks
Dyno question
bb489
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Well, I'm about ready to take my 489 to a dyno somewhere and have it tested and tuned to hopefully find some more power/make sure everything is set up right. I've never been to one before, so I want to know what kind of things I should look for, ask up front, expect, etc..? Also how much $ should I expect to pay? Anything to beware of? Thanks
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7,296 Posts
=bb489 said:
What kind of dyno?
Engine?
About $450-$500 a day
Some places are pretty laid back, others are very "structured"
I happen to fall into the first category,,
Questions,,,
Your fuel or supplied
Water pump or supplied, some are set up to use an electric one
Is the engine complete, primed, basic timed, valves adjusted,,, ready to run?
The closer it is to running the less it is going to cost you.All this stuff takes time & time costs.
Ignition system?
Dyno headers, your headers engine been broken in yet on a stand or new
Bring jets, fuel if necessary, headers if you intend to use yours, assuming they will fit the dyno in question
Are you allowed to do your own tuning so all the operator has to do is pull the handle & make suggestions?
If you have leaks or other issues will they let you do the repair so you don't have to pay extra?
Are they so busy you have to get in & out or will they work with you if there is any issues?
There is no easy answer to your question, some sessions just go better than others,,
Chassis dyno,,,, don't have a clue,
Someone else will need to answer that.
Is this a chassis or engine dyno?
You will want to start to find your best timing and jetting. Keep in mind, when its at the track, you will still need to fine tune, but at least the dyno gets you close.
If you have time, they probably have various carbs, intakes and headers you can experiment with too. Also, this is a good chance to watch your oil pressure in the upper rpms and make sure it remains stable and don't start aerating and fluctating around. I am sure they know this, they should get out of the throttle quick and abort the test until the problem is fixed.
Its sounds pretty exteme and hard on a engine, but as long as its good shape, everything will be fine. If its a engine dyno, you have plenty of guages and mesurments that you can usually forsee a potential problem well before a failure. The items to watch for are a test-to-test drop in oil pressure provided the oil temp is the same, the oil temp rising too quickly (bearing or clearance problem), fluctuation, exhaust temperatures too high or too low (too lean or rich), the brake specific fuel consumption, air/fuel ratio and carb cfm flow.
Finally, relax and have fun. See if they will let you run the test on the final one. After the test, if its a new engine, we usually cut the oil filter open to make sure there are no bearing trouble in the engine.
You will want to start to find your best timing and jetting. Keep in mind, when its at the track, you will still need to fine tune, but at least the dyno gets you close.
If you have time, they probably have various carbs, intakes and headers you can experiment with too. Also, this is a good chance to watch your oil pressure in the upper rpms and make sure it remains stable and don't start aerating and fluctating around. I am sure they know this, they should get out of the throttle quick and abort the test until the problem is fixed.
Its sounds pretty exteme and hard on a engine, but as long as its good shape, everything will be fine. If its a engine dyno, you have plenty of guages and mesurments that you can usually forsee a potential problem well before a failure. The items to watch for are a test-to-test drop in oil pressure provided the oil temp is the same, the oil temp rising too quickly (bearing or clearance problem), fluctuation, exhaust temperatures too high or too low (too lean or rich), the brake specific fuel consumption, air/fuel ratio and carb cfm flow.
Finally, relax and have fun. See if they will let you run the test on the final one. After the test, if its a new engine, we usually cut the oil filter open to make sure there are no bearing trouble in the engine.
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7,858 Posts
Check your local phone book/yellow pages for Dyno shops, or you could run down to a speed shop and ask them. They'll give you prices and/or location. A good dyno shop will do the needed runs to make sure you get consistant results that doesn't include changes to the car. This eliminates a chance the dyno messed up, and your baseline is inaccurate. You can generally do a few things to your car, with the help of the opperator to get your car running as best as possible, with the baseline price. However to tune your car on the dyno, the price goes up significantly, and that includes timing, jetting, etc.
Prices depend on the shop, but it can be hourly rate, or a baseline price for say 3 pulls, or whatever. Expect to pay $50-120 for the min, and upwards a few hundred for some tuning.
If your looking for nice numbers, look for a Dynojet. Mustang dyno's don't give you as high as numbers, but are still good at getting a good idea of what ur engine makes, but more importantly how the entire torque curve looks. Dynopacks I would personally avoid, I've never been a fan of those.
Prices depend on the shop, but it can be hourly rate, or a baseline price for say 3 pulls, or whatever. Expect to pay $50-120 for the min, and upwards a few hundred for some tuning.
If your looking for nice numbers, look for a Dynojet. Mustang dyno's don't give you as high as numbers, but are still good at getting a good idea of what ur engine makes, but more importantly how the entire torque curve looks. Dynopacks I would personally avoid, I've never been a fan of those.
I was supposed to take my chevelle to the chassis dyno yesterday..... my stupid job prevented it from happening though. :angry: (If only I didn't need money to work on the chevelle.... )
The place I found near me has Dynapak, the type of dyno that attatches to the axles on each side, with the wheels off. I've talked to the guy extensively.... while I don't know what he can actually do for me yet, I'm impressed with the info he asked me, and in their level of interest, and confidence that they can hook me up with a great carb tune and timing setting. They asked many specifics, and they haven't even seen my car yet! (or any $$...) They wanted to know the obvious stuff, eng size, heads, cam specs, carb info, trans, etc....he expllained the equipment they have, and what he wants to do to tune my setup. He was also excited to learn that i've got screw in air bleeds..... so if we get to mess with those, it'll definately be a learning experience for me.
They prefer to use a wide-band o2 sensor, threaded into the exhaust. they want $50 for the parts an labor to intall a bung in my exhaust. After that, the tuning is $200/hr. He figured 1 hr at least, but should be less than 2. I'm bringing my own jets and such, so I hope to get out for $400 or so.... I'll have to wait and see!
I'd suggest in your case, call a few places, and talk to them and see how comfoprtable you are with them. Then if they have a price you deem reasonable, go for it!
Here's where I'm going...
http://www.rocketridesperformance.com/dyno.html
)The place I found near me has Dynapak, the type of dyno that attatches to the axles on each side, with the wheels off. I've talked to the guy extensively.... while I don't know what he can actually do for me yet, I'm impressed with the info he asked me, and in their level of interest, and confidence that they can hook me up with a great carb tune and timing setting. They asked many specifics, and they haven't even seen my car yet! (or any $$...) They wanted to know the obvious stuff, eng size, heads, cam specs, carb info, trans, etc....he expllained the equipment they have, and what he wants to do to tune my setup. He was also excited to learn that i've got screw in air bleeds..... so if we get to mess with those, it'll definately be a learning experience for me.
They prefer to use a wide-band o2 sensor, threaded into the exhaust. they want $50 for the parts an labor to intall a bung in my exhaust. After that, the tuning is $200/hr. He figured 1 hr at least, but should be less than 2. I'm bringing my own jets and such, so I hope to get out for $400 or so.... I'll have to wait and see!
I'd suggest in your case, call a few places, and talk to them and see how comfoprtable you are with them. Then if they have a price you deem reasonable, go for it!
Here's where I'm going...
http://www.rocketridesperformance.com/dyno.html
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