what is the best way to tune, street or dyno? and please state why which is better or more effective when specifying

 

strip/track > dyno > street

 

A dynojet is my preference. The tuner can adjust timing/boost/fueling in a controlled environment. They can make changes and look at the graph (smooth is what you want) to see how the engine reacts. You can also tune the knock filter safely if your car has a built engine and is louder (mechanically) then stock. The tuner can also use "knock ears" and listen for detonation .

There is no risk of getting a speeding ticket or going to Jail.
Less harm on the engine if something isn't right.
You can quickly address problems and make adjustments.

Using low smoothing ( 0,1,2 ) on a dynojet shows you how good/bad the engine is running . I've seen some cowboy dynographes that looked like a mountain formation and the tuner was proud of the the result. Thats a good example of not knowing any better. Numbers are numbers and more people should look at the graph rather then just peak.

Before going to the dyno, zip tie all hoses and fix any boost leaks and make sure its ready to go.

 

^^ Agree. Specifically find a load bearing dyno. Tony Palo of T1 was able to find more power by putting his GTR on a dyno versus tuning only at the drag strip.

 

I prefer dyno tuning for a good baseline. Then touching up that tune if need be on the road in a real world environment.

 

I would do most of the tune on a dyno, then dial in the rest at the track on a test and tune day.




Please dont tune your car on the street. It is not safe and to many mini vans full of families. But if you live in the middle of nothing then please use good judgement.


Most rental session are like 200-300 bucks for a few hours.

 

I prefer my car tuned on tarmac (no not with other cars) vs a Dyno. I don't drive on dynos!! I do drive on the road however

 

Well said All street tunes in my ECU

 

Street tune.
*** dyno
Very detailed fine tuning usually involved in street.
Affordable
Free if you study

 

Both.

A dyno tune always needs retuning on the street because a dyno can't reproduce the road properly.

A tune always starts with a cold start. Then idling and warm up.
Then a hot start , then low load.

You're NOT going to go onto a dyno until you've got it pretty much driving properly.

In my own case I like to do pretty much everything on the road (zero traffic), it's easy to calculate torque from acceleration, calculate power from torque and RPMs, also calculate power from fuel pressure, IDC, BSFC, then compare the power figures to make sure they match.

The time to go on a dyno is if it's making too much power to road tune or if there's no safe roads.

Then when it comes off the dyno it needs a retune.

Cars seem to get dynod with the hood open.
You don't race with the hood open.

The open hood makes a big difference to dyno numbers when you've fitted a pod filter with it's hot air intake.

 

How do you consider the track/strip better for tuning than a dyno?

 

Real world tuning for specific conditions and getting actual feedback from your changes. Real world conditions allow you to determine how the whole car as a complete system responds to your changes. In motorsport the whole car is tuned to specific tracks and specific conditions like weather and altitude.

Also what works on a dyno could literally blow up an engine when subjected to the real world rigors of racing. A dyno is a tool, and a good one, but what counts is what makes for a faster more stable car in the real world

 

i dont drive on a dyno to work every day

 

Best way is to get the tuner to come to the track with you and do datalogs there.

 

Wow, lots more "street/track/road tuners" than I expected. I've always thought dyno was good enough...