A90 Supra MKV on the dyno

[Twisted Tuning]

I think you guys are confused, as i wasn't using a V-dyno as a replacement. As i use and have a real dyno, lol. Someone asked about it, so i posted. Really, there was no hacking parameters. Frontal area is a fairly easy calculation and takes 10 seconds to figure out. Drag coefficient is a little more complicated, but can also be calculated or simply used a known value. The rest is gearing which is readily available.

All i did was plug the log into VD, adjust the temp to match the log, and change the weight to roller weight of the dyno. And it spit out virtually identical curve and numbers. the guys who said it was way off probably left the vehicle weight when using a dyno log, that isnt correct. no real hacking needed. put the info in, load the log. spits out the numbers. its an estimate, not absolute. And is all based off calculations (speed vs time) similar to dynos for the most part.

Anyway, like i said, wasn't posting VD saying its a replacement. but in my experience, as long as you don't fudge the numbers and are honest. its generally very close and something people can have fun with. in the end, trap speed and et is the best way to know approximate power. And even then its not perfect science.

Sponsored

 

[johnny_10196]

 

[vb22]

 

[Captain_Kirk]

 

[65sohc]

So in the midst of all those youtubes I missed what, if anything, the MST intake gained. Was it any more than a simple HKS panel filter which supposedly is 5-9 hp?

 

[Dannyvandelft]

So in the midst of all those youtubes I missed what, if anything, the MST intake gained. Was it any more than a simple HKS panel filter which supposedly is 5-9 hp?

I just assume an intake only adds noise. These days intakes are so well designed, aftermarket ones don't add any power, and sometimes even lose power.
They get you by "dyno proven gains" BUT that's a dyno run right after the battery has been disconnected and the car is running slightly richer while relearning fuel trims.
Just consider an intake like a catback. Noise only.

 

[65sohc]

I agree. The stock air box has flow diverters which don't appear to be there for looks. I did install an HKS panel filter which showed a modest gain on a dyno from someone who is not selling the part which is always a plus.

 

[Twisted Tuning]

As I have said before, unless you're going beyond 650whp or so the stock airbox is sufficient. You could replace the pipe between the turbo and airbox. But replacing the full instake system is a waste of money below the power level i mentioned. But if someone wants to spend all that money for a sound change, to each their own.

 

[65sohc]

It is interesting to gauge how restrictive a stock intake is by hooking up a manometer between the filter and the throttle body and measuring the amount of pressure drop which is, essentially, negative boost. I've done this on numerous vehicles. On my GT350 it was close to negligible, about 11" of water vs. 6" for the aftermarket system. On my Boss 302 the factory system was quite restrictive with a whopping 28" of water vs. 6" for aftermarket. I got a solid 10hp increase on back to back dyno runs.

 

[Captain_Kirk]

 

[Supraboi7]

Does anyone have a dyno graph comparison for stock vs catted downpipe? Interested in seeing if the power comes on sooner!

 

[gymratter]

 

[supraboi]

 

[Captain_Kirk]

Dyno starts around 12min.

 

[vb22]

Sponsored