I went to a dyno to tune my car. I had a Hondata setup but switched to Uberdata so I could tune it myself.

Here is the Hondata setup (scroll down): https://honda-tech.com/zerothread?id=826578

Power gaining mods:
Mugen intake
HyTech header and exhaust
RS Machines cams and valvetrain
Skunk2 cam gears

This is the Hondata setup on the dyno I used:
These numbers are flywheel hp. NOT whp. A stock euro ITR dynos at around 190-195hp on this dyno.


This is the Uberdata program I made on the road with a wideband. A/F is around 13,5:1

Gained 4-5hp compared to the Hondata setup that ran around 12-12,5:1 A/F in the top end.

Then, I changed the cam gears from (+2,0) to (+3,0) and got this:

Gained before around 7400rpm, lost 3 hp over that point. Continued with the lower peak number graph. Nice low end and mid range gains...

Changed cam gears to (+3,+1), but that didn't do much:


Changed cam gears to (+3,-1) and got this:

It is not compared to the correct graph. Learning to use the dyno software, operating a dyno and tuning for the first time is not easy It did give better peak numbers though.

Then I added 2 degrees of timing using Uberdata in the entire rev range and gained power up to about 7k rpm, and lost some after that. Didn't take a picture...

So, I removed 4 degrees of timing above 7k rpm (total -2 compared to stock GSR bin file) and got this:

Again compared to the wrong one, but better peak numbers

Then, I removed 1 degree above 7k rpm:

Not much of a difference...

Another -2 degrees above 7k rpm:


Another -1 degrees above 7k rpm:

Stopped after that.

If you look closely I actually lost a little power from 7-8k rpm by pulling out timing on a couple of the runs. I didn't notice that when I was at the dyno, so I just added 3 degrees from 7-8k rpm afterwards. It should have been set up to show different colours, so you couldn't make this mistake...

This is the before/after from the changes:


I am pretty happy with the gains. Not a huge amount, but I had fun using Uberdata and the dyno

What do you think?

A little in car vid:
http://www.we-todd-did-racing....DE%3D
See, it's still too slow




Modified by DanishR at 1:21 AM 11/28/2004

 

so much dyno time.

 

good thing you mentioned that chart is in flywheel hp otherwise the gremlins of the itr forum might jump on your bones for posting this

 

So about 30 flywheel HP with bolt-ons and tuning? Very nice

 

Excellent, nice smooth curves with no glitches...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">So about 30 flywheel HP with bolt-ons and tuning? Very nice </TD></TR></TABLE>

There was 30 flywheel hp with the intake, header, exhaust and tuning.
Then another 10-12 flywheel hp with the cams and tuning.

It was about 5 flywheel hp weaker when it was stock than 2 other ITR's for some reason...


Modified by DanishR at 2:16 AM 11/28/2004

 

very nice, sounds awesome