Quiestion for the big guys.....Dyno tune or Street tune?
 

I've been talking with a few turbo guys and they say that it is best to tune your car into a ballpark figure on the dyno then fine tune the car on the street because the dyno doesnt bring the "LOAD FACTOR".Is this true?



Eric

You are best off getting it close on the dyno ... but the reason is that you don't want to waste expensive dyno time tuning for partial throttle, and you can't get the effect of moving air through the intake/intercooler, etc. Dyno's can put a load on the roller, so it's pretty accurate. There's just a lot of factors that come into good tuning for a street car. For a drag only car, the dyno is a lot more accurate.

Whoever your boy is needs to be slapped, the only tuning should be done on a dyno with a wide band lambda sensor

Well,the guy that I was talking to has a 7 sec turbo mustang,I know a mustang.Not a 7 but fuck I was just curious to what he was saying .......


ya heard !

Tuning on the street with a wide band is also ok. I've seen many cars tune on the dyno but fine tune on the street with the wide band.
The advantages on the dyno is seeing how much more HP you make at 15deg advance or 17 deg advance and so on....

Anthony

I believe Ari Yallon uses the dyno and street to fine tune the RX-7.

I agree with BOOSTD 7 on this one. Tune it on the street with a wideband. do it as well as possible. Then head to the dyno to fine tune it. You can miss things on the dyno, and you can miss things on the street... hell , you can miss things when you do them both... just whatever you do, use a wideband o2.

Did you get your Haltech, or have you changed your mind?

ok, where are the places to purchase wideband O2 sensors and hardware, and are there any that can connect to a laptop to datalog the run so you can make adjustments after the run?

MRM Wideband
 

In the ECU forum there is a thread about widebands. I posted in there, but I recommend the MRM unit. The link is in that thread.

Uhmmm i dont understand what you guys mean by street tuning a car...sorry can u break it down for me cuz im not familiar with this....Thanx

Instead of tuning the car on the dyno most people tune on the street. Example, instead of my spending hard earned cash on dyno time, I can drive around town and adjust my fuel and timing curves for free.

Im just waiting for MAZDATRIX to finish my streetport job done then the motor will then be assembled. I will be using E6K to support my TO4 and the rest of the car. I have some few questions for you guys.

Should i plug the HALTECH myself then tow the car to a dyno shop?..

OR

Should i just street tune the HALTECH?..
This car by the way is just to street!..

Also where is the best place to put the HALTECH UNIT on an FC Turbo?..

Welp then i would assume that street tuning is somewhat to very inaccurate...Ohh and thanx for clearing that up for me man...

Not inaccurate, just cheaper. If you are doing everything properly you should have gauges to read during your tuning to see how your engine is performing. If you engine is performing at its peak then your gauges will reflect that. I spend dyno time experimenting with things since there is less load on the dyno than in the real world and things can be shut down faster than on the street.

Rev. Dr. Jay
http://ricemobile.net/

I suggest you call summit 1-800-230-3030 and order a power speed calculator by morossofor 15 bucks. Get the car close on the dyno. Then take it to a drag strip. The power speed calculator is very accurate if you are a consistant driver. The truth is I've seen alot of engines\cars make alot of power on the dyno but can't get out of their own way at the track. Ive been in the racing industry for awhile now and seen some weird stuff. You won't be able to tune it on the street because torque will fool you very easily. The car may feel faster because of the torque pushing you into the seat. Alot of people ask me how to get alot of torque out of their engines. I just tell them to convert their car to a turbo diesel and go pull as many stumps as they can because their car will be slow. Also don't look at peak horse power numbers either, these are for people that like to say they have 1100 bhp, I'd rather say I have 900 average BHP from 4000 rpm and up. Look at formula one engines for a second, they make roughly 200 pound\feet of torque but around 900 bhp. HP = tq x rpm divided by 5252. Tuning on the track is much better anyway because it's alot safer, legal, and accurate.

Agree with the majority.
Tune on the road and dyno .... both using a wide band O2 sensor.

By the way, the new Dynojets can also further "load" the car.

Both street and dyno tuning are valuable. I think you should first tune on a dyno (especially if you have a new engine you are scoping in).

You are able to watch many parameters at once at the dyno and can stop as soon as trouble is sensed or heard. Sometines on the street it is harder to hear things that are important.

Tuning a 7 on the dyno brings results very close to real life on the street. There are some cars that when taken to the street may perform a little differently than on the dyno due to certain reasons. A lot has to do with the load put on by the dyno machine.

I think both are important, but do the dyno first :)

HITman prefers tuning on the street. It is real world. Yes you can put a load on a dyno, but not the same as going up a hill, down a hill, through some twisties on light throttle.....

Dyno is for power runs, no registered cars and cars on big boost and race fuel that don't get traction on the street :)