As someone who has done at least a thousand soft dyno pulls this year, I'd like to share some pointers about how to get a meaningfull datalog.

1. Make sure the car is totally up to normal operating temperature, but not heat soaked. I drive several miles on the highway before doing my first datalog, then avoid stopping between logs if possible to minimize heat soak.
2. Only datalog 1 gear from a low RPM to redline. Data from a 1st through 4th jaunt is worthless. Depending on the speed of your datalogger, you might be able to get good data from 2nd, but 3rd will probably give much better data. The challenge is finding a spot where it's safe to accellerate from 2500 to redline in 3rd several times.
3. Try to do all your tests of different setups using the same tank of gas on the same day in as short of a time span as possible. It's surprising how much difference a different batch of gas will do to AFR's and power.
4. If you have to do datalogs on multiple days with different tanks of gas, then repeat at least one of the datalogs on the 2nd day before swapping in the next setup. This will give you an idea of how much difference the new climate and gas impacted the results.
5. If you want to analyze the data with a software dyno, make sure each datalog is performed with the same total vehicle weight using the same exact stretch of road in the same direction, etc.
6. Make sure the A/C is off and the top / windows up.

 

Thanks Gernby. I am actually not data logging soft dyno pulls as I think those would show "meaning less" results.

I am logging, IAT, Coolant temp, Engine RPM, Engine Load, and speed. I think these are that areas that a difference would be seen in.

I set-up a 30mile loop that encompasses residential speeds, high way speeds, in-between speeds, and a stop for a time duration with both the car running and the car off. My expectation was to see a shift in IAT temps under each test condition...

From my observations during the drive, unmodified IAT seemed to average out about 120*F, thermal wrapped actually a few degrees warmer... BUT the IAT appeared to fluctuate very quickly and often with the Intake wrapped vs unwrapped. The more load the motor was under the IAT temps would drop very quickly where unmodified it seemed to just stay at 120*f or drop slower... Thermal wrapping seemed to help with heat soak too, it seemed to not reach the same temp after sitting in comparison to unmodified...

I will be looking at the data in the morning to confirm my observations... But my initial assessment, wrapping the intake affected IAT temps when the motor was subjected to load, and adding pulling air from outside the engine bay should also affect IAT temps...

 

hey silver~ can you post moar pics of your setup after it's all done? thanks man

 

Will do Hirev...

This is what I did today.... Ducting should be in Monday so I should be able to get it all buttoned up some night next week

 

Any ideas on a clear sealant for the tube against the lens?

 

Well you could just get some clear silicone caulk... then there is epoxy but that is certainly permanent at that point!


I didn't get a chance to look at the data from the 2 data log runs on Saturday... Irene took my power away at 8 yesterday... Still don't have it back...

 

Yea just anything that will hold up to the hot to cold climate of NY.

After seeing the 3" tube i have the itch to go big or go home as well lol. Maybe ill just form the 3" to see how it would look against the lens.

 

Just thought id post up some pictures of my progress, slow and steady.

 

WOW great job guys!

 

Tape of around your bevel on the lens and use clear drying epoxy in the crack. Than hurry up and pull off the tap leaving a nice perfectly filled bevel.

Looks great!