dyno vs street
Oct 27, 2016, 11:45 AM
#2
EvoM Community Team Leader
strip/track > dyno > street
Oct 27, 2016, 11:53 AM
#3
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.
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.
Oct 27, 2016, 03:22 PM
#6
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.
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.
All street tunes in my ECU
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gsrboi80 (Oct 27, 2016)
Nov 12, 2016, 09:36 PM
#10
Account Disabled
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.
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.
Nov 21, 2016, 11:53 AM
#12
EvoM Community Team Leader
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
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
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butte (Nov 26, 2016)
