Dyno 5/12/07

[BlackMagic]

Well, just wanted to say thanks to Brian for waking up early and working getting the Teg on the dyno.

We had some weird timing issues all day, but I believe that the distributer is the culprit. The car started making only 132 hp @ 7psi with i figure about 10-12* of actual timing. After playing with the ignition map we got the car to a conservative tune of 196.4 hp @ 7psi. This was done with a small trim t3/t4 turbonetics kit.

I had hoped to see around 220whp @ 7psi so we could get there with a little more timing. Tuning will resume once I get a good distributer in the car.

Thanks again Brian

[KryptoSol]

What are you using for fuel mangement?
and whats the trim of the "small trim" hybrid?

Just curious, was it breaking up???

[BlackMagic]

The car is being tuned on AEM.**I think the turbo is around a 47 trim.**Next time I come up I am going to write down the number and get the compressor map from turbonetics.

About the timing issues.**When I showed for the dyno we checked idle timing and it showed only about 2* actual timing when the ign parameters showed 16* total timing.**We free revved to 3000rpm and the parameters showed 35*(which was correct according to the ign. map) but the actual timing was only at 21*.**I tuned the AFR's first and then started to play with timing, increasing about 2* each pull.**The torque values kept rising and the hp and toque curves smoothed out each time.**We pulled the plugs at about pull #6 and the timing mark was barely even showing on the plug.**At this time I was at 29* timing in the ign map.**We continued in 2* increments and the torque kept climbing.**We got to 196.4 hp and 178(i think) ft-lbs torque and the ign map showed 34* timing at full load.**I figure if the actual timing and map followed the original pattern I was at 20-22* actual timing.
I made one final pull and shut the car off at the top end to check the plugs.**We did so, and the timing mark was barely at the start of the bend in the strap.**This was good enough for now, but the car wouldnt start again.**I check the ignition parameters displayed by AEM and it showed -17.00* timing while it was "trying" to idle.**I restarted the computer and reloaded the map but still got the same result.

I took the car back to the shop and Russ and I pulled the dizzy and took it apart, nothing loose or anything.**We reloaded the map I had tuned on the dyno with the same result.**I then loaded the map I started with at the dyno and the car fired.**So I figure something happened with the other map.**I copy and pasted the tuned maps into the running map and the car fired right up.**So we decided to take it for a spin...well shit, now the car acts like it has WAY too much timing in boost.**We were already late to the track so I didnt get to recheck idle timing with the light, but I am pretty certain it will match the ign parameters now.
The dizzy that is in the car was built with parts I had from several other distributers, but it was done in the same way as my white turbo hatch. I am going to get a new vtec dizzy and see if that fixes the problem.

[KryptoSol]

Sounds crazy...

[BlackMagic]

yep.**If anyone else has ideas about what it could be let me know. :)

Some good news though.**I just called turbonetics and they tell me the turbo on this kit(if this is the right kit) is the T04B V-trim which is a little bigger than I thought, but I did some calculations and at the power we made, we needed 22.54 lb/min of airflow with a pressure ratio of 1.5(about 7lbs) which is pretty much right where we were.

I plotted the operating range from 4000 to 7800 on the compressor map and it shows we were in a good operating point, but the turbo has some left in it.**Below you can see the operating line at a pressure ratio of 1.5 drawn in red.**The blue line would be at 300hp, as you can see lower RPMs would give us major issues.**I figure we could safely hit 250 if we turned the boost up a little.

http://i50.photobucket.com/albums/f326/wsuk20/Danscompressorplot.jpg

[KryptoSol]

if i'm not mistaken, that looks similar to the 57trim comp map.