Turbo dyno
Turbo dyno When you are getting your turbo'ed car dynoed, I have read in multiple places, you should run your car in the highest gear instead of 4th. Does anybody have any input on this? Here is one example of what I have read.
http://www.sdsefi.com/techdyno.htm
On intercooled, turbo cars, there is usually insufficient airflow to ensure accurate results due to charge temperature variation which can be substantial. Even coolant temperatures may not stay down during the run which can affect power outputs considerably. The rate of acceleration is also important on turbo cars to be sure that the boost is not lagging the engine rpm. With RPM climbing too quickly, the boost has not reached a peak value so the hp figure is again inaccurate. Turbo cars should therefore be tested in top gear.
http://www.sdsefi.com/techdyno.htm
On intercooled, turbo cars, there is usually insufficient airflow to ensure accurate results due to charge temperature variation which can be substantial. Even coolant temperatures may not stay down during the run which can affect power outputs considerably. The rate of acceleration is also important on turbo cars to be sure that the boost is not lagging the engine rpm. With RPM climbing too quickly, the boost has not reached a peak value so the hp figure is again inaccurate. Turbo cars should therefore be tested in top gear.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
OK, lets see them dyno a car in 6th gear.
Can their rollers handle being spun to almost 300mph ??? I doubt it.
4th gear is best on most cars, as a compromise of roller speed, drivetrain strength and efficiency, and also to allow the rollers to achieve a decent time for each pull.
Can their rollers handle being spun to almost 300mph ??? I doubt it.
4th gear is best on most cars, as a compromise of roller speed, drivetrain strength and efficiency, and also to allow the rollers to achieve a decent time for each pull.
OK, lets see them dyno a car in 6th gear.
Can their rollers handle being spun to almost 300mph ??? I doubt it.
4th gear is best on most cars, as a compromise of roller speed, drivetrain strength and efficiency, and also to allow the rollers to achieve a decent time for each pull.
Can their rollers handle being spun to almost 300mph ??? I doubt it.
4th gear is best on most cars, as a compromise of roller speed, drivetrain strength and efficiency, and also to allow the rollers to achieve a decent time for each pull.
Trending Topics
The real issue here is load. Most dynojets are not load capable. Personally I think using a non load capable dyno is a waist of time, esspecially on a turbo car.
Find a loaded dyno, like a mustang (and others) and put more load on it. That way the pull is slowed down, data acquisition is better, and the tuning is real world comparable.
If you use a non loaded dyno on a turbo car, you can put timing in, take fuel away and make big numbers......pull it out on the street, detonate the hell out of it, then tune it right back were you had it before the dyno.
Or just leave it, trusting the expert operator, and be in for an engine in short period of time, and for some reason most dyno shops also do engines...HHMMMMmmmm
Find a loaded dyno, like a mustang (and others) and put more load on it. That way the pull is slowed down, data acquisition is better, and the tuning is real world comparable.
If you use a non loaded dyno on a turbo car, you can put timing in, take fuel away and make big numbers......pull it out on the street, detonate the hell out of it, then tune it right back were you had it before the dyno.
Or just leave it, trusting the expert operator, and be in for an engine in short period of time, and for some reason most dyno shops also do engines...HHMMMMmmmm
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
