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The mkiv Supra Owners Club

Dyno run with cats and stock air box


Chiefgroover

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On a dynapack, Sat afternoon.....

T04Z, BVH, Tanabe touring quiet exhaust (you know those real restrictive ones ahemm) Two parallel 3" cats, and a stock airbox with blitz LM panel filter.......so what did it make @ 1.45bar ?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

665BHP @ the fly. ;)

Not bad for something thats very quiet around town. Will dyno shortly with no cats but stock air box @ 1.6bar or more.

 

Have pic of dyno screen will post at later date when i get it e mailed to me.

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256/264 HKS & type R intercooler, AEM etc.

 

Cats, which are slightly damaged (crushed) from hitting a speed ramp are Random technology 3" race cats. You can see them in the custom fabrication thread i did a few weeks ago.

Standing behind the car on the dyno I got to realise just how much they flow lol.

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Here you go. I suppose it dispells some of the "massive restriction" idea's so commonly used in car talk vocabulary.

Yes, it will make more without the cats and a different intake but the noise and social aspect vs a small decrease in performance and the ability to live with it easy will appeal to an increasing number of people I think?.

dyno t04z 1.45 cats sm1.jpg

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Put it this way, the knock sensors now read half the voltage I had before, I dont have black smoke out the exhaust even on the hardest pull, it runs smooth as silk, but the biggest improvement is the fuel economy, a massive difference in the fuel i am getting through so much easier. Dont know the EGT's but I'll ask and get back to you. I think you'll be more interested in my next run without cats. Might get it done this week.

I'll get a good pic of the screen as its not printing right now.

Edited by Chiefgroover (see edit history)
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From your print out it looks like the car has been dynoed in 3rd!!!! Any reason for that?? Personally I would have thought the EGT's would be high at an AFR of hi 11's, the AFR under boost makes very little difference to power but a lot of difference to safety, saying all that Dimitri's mapping is well known so its prob just a diff slant, he is the 'mad scientist' after all!!!! Just don't want peeps running out and altering their ECU's without his know how.

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With any Dynapack i have to use, i always give the Hub figure as the Flywheel figure mainly because Dynapack say too! Dynapack hub figures always come within 5% of a Dynodynamics then.

 

Either way it still good :thumbs:

 

Have you had it noise tested and emission tested yet?

 

Ryan

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