Lately there has been a lot of debate and discussion concerning the issue of how best to properly tune a car and what methods will achive the best "results"

As I was comming to Atlanta where Top Speed is located which has one of the best dynos available - a brand new Dyno Jet I decided to offer the customers an option of either dyno tuning or road tuning

As fate would have it the customers slpit 50 / 50 with half getting a dyno tune today and the other half getting a road tune tomorrow

One of the guys from tomorrow's road tune - member 1.8T showed up today and I decdied to tune him today on the road to get him done before some rain rolls in

His car was right down the middle of the road

RMR Intake
GSC 264 / 264 cams
Buschur 3 " Exhuast
Hallman MBC
Walbro pump
10.5 Hotside

custom road tune

With 93 octane pump gas and a nice conservative tune - this is what his car was doing with a few corrections on base map for his set up



NOTE * the Territory here is not 100% flat and I was going slightly down hill on this so the G's are a bit high

The car felt crisp, smooth and the data log showed a nearly perfect tune. However, the car MAY have had a slight boost leak based upon how the boost was falling down - a small one.

Now it was time to strap it on the dyno and see what it would do.

I DID NOT TOUCH THE FLASH - just adjusted the boost a bit to match the load on the dyno and we see that the dyno sheet is represnting exactly what I am seeing on my data logs

I have said it 1,000 times - A GOOD TUNER can get the same tune on a dyno or on the road

Road going cars are driven on roads not dynos so I prefer road tuning but either way will get you a good result if you know what you are doing and take your time

BTW - today I tuned a IX on the same dyno with a TB exhuast and MBC which made 360 TQ with pump gas

 

 

Thanks to Doug and Top Speed for warm hospitatlity and assistance today

Top Speed is a great dyno facility

 

The car feels strong and smooth. Thanks again for the tune Al. I have always liked road tunes. My previous project car that was built was road tuned and it is still running today, 3yrs later, on a motor that was never meant to see boost at all, much less 14psi(and it runs strong too, 115mph traps)

 

Big thanks to Al and Topspeed for a great afternoon, glad to meet some of the newer people and thanks again Giovanni for lunch

 

Hey Doug,

DO you think you can email me or PM me all of my dyno charts from earlier today? I would like to keep a copy of all of the runs that Al did.

I believe you named the folder "nathan".

Thanks again for hosting this event.

Also, I did have one question on the graph that you just posted. Are those uncorrected numbers or SAE corrected?

Thanks,
Nathan

 

graph says uncorrected

 

Is there a conversion for SAE Corrected?

Al or Doug, do you have the SAE corrected dyno graphs? I am curious to see how they turned out.

Thanks,
Nathan

 

You just take the run file, put it in WinPep, then switch to SAE. The correction factor depends on the weather conditions.

 

1.8t your boost appears to fall, but nice power though. You need to tighten the WG act a few turns or get a forge WG act
Thats whay the difference


These IX #'s are just getting out of hand.

 

368 actually

haha

al would you mind sending me the charts from my car? thanks

 

Nice job Al.......1.8t enjoy

 

Hehe, already used to the power to take down my little brothers Cobb stg.2 STI(300whp/350wtq on pump gas). Got him pretty good. Fun stuff.