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Data Logs From Power Cruise - Off Street Drags

Guilt-Toy

By Guilt-Toy,
in Engines & Forced Induction

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

I took some logs of the street races and i am pretty embaressed to say that i totally botched the race with that torana... i stuffed up hardcore. :)

I got some data together, i did forget to set the ecu to log SPEED as well :blink: so i got the data that was logged and set it up into a excel spread sheet.

You can see that the stupid anti lag did not spool as fast for some reason, i think i was too slow on the throttle and i dropped the clutch at 3100rpm when racing that Torana Drag car compared to when i raced the Datto 1200 ute i dropped it at 6100rpm+.

So yeah here is the screen shot and the xl spreadsheet if anyone is interested in checking it out. I cannot say that i would have beaten the Torana if i launched properly because its best quarter is a 8.7 second quarter mile but I can say things may have been different. I guess its all a big learning curve and i know now what NOT to do next time.

Anyways if anyone can give me some ideas on where i stuffed up or whatever then go for it.. I can take constructive critisism.

I converted the boost levels every now and then from KPA to PSI so you guys understand the boost levels i was running, over 30psi!! - 2 bar of boost.

Metric Converter is here, put the boost kpa in my log into absolute KPA to get the PSI

http://skylinecentral.org/upload/MetricCalc.exe

Excel Spreadsheet

http://skylinecentral.org/upload/race.xls

racej.JPG

Fastrotor Proficient

Fastrotor

Posted
Posted (edited)

And just to comment on the data..... even though you botched the drag car run with the antilag , its obviously alot smoother.... whereas your having to be on /off throttle alot more with the ute run.....

So maybe you need to try a lower rpm limit to reduce crazy wheelspin on launch for when it does boost up properly ? Obviously wheelspin is always going to be there with your power, but the drag car runs shows higher boost and more consistent, so if you can get this with the more instant responce of the dato run......

This is on pump fuel too isnt it ??

Gary

Edited by Fastrotor
Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted

yeah.. thats the one.. its a 8 second drag car with wheelie bars and chute!

it would not have looked so bad if i did not stuff up the start but you get that :banana:

You do know that this Torana won ?

paulr33 Grand Master

paulr33

Posted
Posted

when you ramp near 30 psi your afrs plummet to low 10s

is this by design as part of a safety catch?

your probably sacrificing power / throughput to cram more boost in safely - ie there might be no gain from this, or it could be negative gain

you might find more power / throughput from less boost and mid 12.5 afr instead

Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted

Yeah I like to run my engine rich. Especially for power cruise I was expecting it to get hot and I wanted to keep the temps down as much as i could so I tuned it this way.

I never tune my car to 12.5. I would rather sacrifice 10kw and have heaps of extra cooling there then have a tune on the edge which will detonate when the air temps get up there..

The car ran hard all weekend, 3 days worth of thrashing the crap out of it and the engine did not miss a beat! Yes i did go through a full tank of fuel in 190km's worth of track time in ONE day but i had damn good fun doing it.

I normally run 11.3 - 11.5afr on cars I tune with a fair amount of power. Its just safer that way, my 10afr stunt was just something I did for my car because the weather was a bit up there on the sat and sunday.

This was tuned on BP98 and was running on Shell optimax half the time at power cruise.

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