ka24de t25 dyno

[dirtdiggler666]

ok i just want to see whats been the best numbers you have seen from a ka with a t25?? dyno sheet tho not well my friends friend hit like 300 whp bs.

oh and whats about the psi limit of a t25??

thanks guys

[SleepR 240sx]

Not sure about the numbers for a Ka-T, but the psi limit is about 12. Thirteen is capable, but 14 will probably burn the turbo out pretty quick. Twelve is generally the best setting for a t-25.

[dirtdiggler666]

thanks man

no ones got dyno sheets??

[sldbyuramg]

psi changes with octane used...what octane gas is gonna be used i said test?

for example if he can use 12 psi with 91 oct he can safely run maybe 15 or so on 93...and maybe 22 psi on race gas.

[punxva]

try ka-t.org... Dyno graphs for days... you probably wont make any more than 250, at 12lbs

[dirtdiggler666]

ok but race gas or not if the turbo is only efficient to say 12 psi how would race gas help??

[UNISA JECS]

If you do more research you'll probably want to avoid using a T25 alltogether, atleast a S14/S15 T28.

Dig threw here and weed out the T25 dyno's:

http://www.ka-t.org/forums/viewforum.php?f=3

[RedtopTech]

Not sure about the numbers for a Ka-T, but the psi limit is about 12. Thirteen is capable, but 14 will probably burn the turbo out pretty quick. Twelve is generally the best setting for a t-25.

While your initial statement indicates that the engine itself is a variable.
The rest of your statement is (for the most part) the only information some people need. That being said you are still spreading bad information. A turbochargers output is measured by how much air it is designed to flow. If the compressor is forced to spin faster (to increase airflow) the turbine starts to whip the air (turbulance) instead of flowing more air.
Now for example: the t25 on a near stock sr20 will produce 12 psi while still efficient enough to outweigh the increasing outlet temperature, it is already spinning from 100,000-125,000.
now take that same turbo and install it on a 6 liter engine. The turbo will be able to produce that same 12psi but only untill (example only) lets say 3000 rpm. At this rpm the airflow through the engine is low enough to to restrict the air being forced out of the turbo. Now once the engine reaches a higher speed lets say 6000rpm. The turbo is now spinning at a rediculous speed yet doesnt produce enough airflow to build much boost if any. Simple example: blow as hard as you can through a straw. Now blow as hard as you can through a paper towel roll. If you could upgrade your lungs to produce more airflow than you could actually build pressure.
This same affect can be seen even on a stock sr20. It will hold 11-12 psi untill redline howhever if you turn the boost up to 15psi it will only hold to around 5800-6200 before it starts droping back down to 11-12 psi. Conversaly if the turbo wastegate was left at 12 psi and you modified the engine to flow more air, or simply rev the engine to a higher speed (considering that increase in rpm correlates to more airflow) than you will see the compressor mantain that pressure untill the engine reaches a speed where it flow's more air than the compressor can produce.
Another important variable to mention is the turbine side. The turbine is a restriction in the exhaust which is designed to flow only a certain amount of air. It is possible that the compressor side is capable of holding a certain pressure while the restriction caused by the turbine causes such a large build-up of pressure that exhaust air can be forced back into the cylinder even when the piston is still on its exhaust stroke. Obviously any exhaust gas in the cylinder (inert gas) will take up space of incoming air and fuel. Less power. One way to experience such a condition would be to use a nitrous shot that produces enough exhaust gas to overcome the flow potential of the turbine without affecting the pressure of the compression side.
bottom line: if i install a t25 on say a 1 liter renault, im sure that i can produce well over 12 psi and stay efficient.

[McRussellPants]

picard.jpg.

ugh.

Thanks bill nye.

"your information is correct, but im gonna tell you you're wrong and say the exact same thing in a novel i composed while working at my menial job"

[RedtopTech]

psi changes with octane used...what octane gas is gonna be used i said test?

for example if he can use 12 psi with 91 oct he can safely run maybe 15 or so on 93...and maybe 22 psi on race gas.


When people read your posts and you arent very clear about what you are attempting to convey, Information can get misconstrued. This is especially true in this technical field. The internet is a great resource for information however much of that info is false do to this very reason.
I already answered your second question in my previous post so ill leave that alone. Now I'm sure what you were attempting to convey is that a rise in boost pressure that would surpass the detonation resistance (octaine rating) than a higher octane fuel should be used be used.
Your statement could be misunderstood in that pouring in a higher octane fuel somehow directly changes the boost pressure. I know that sounds rediculous to those who know but hopefully thats just one less ignorant statement someone would read on nicco. just an example......

[RedtopTech]

well sir, i put out a lot of information in that post in order to help others grasp a better understanding. I would appreciate any informative rebuttal, especially if i put out anything misleading. as far as my Career i have been in the automotive business for since i was 17. My Career has aloud me to provide for my family which to me is far from menial. Also i read your post again and i see that you stated that my information was correct. so i guess this reply is simply a waste of effort on my part and only shows that I'm concerned with what others think.
I wont pretend to know anything about you or your knowledge sir but do you have a deep enough understanding to make an accurate statement such as "your information is correct?"

[RedtopTech]

Also Mr. Mcrussellpants, this is the "technical forum."

[Ian]

this is the worst thread i've ever seen.


i've seen up to 270whp from a T25 KA-T

mighta been a t28



honestly if you're being this ghetto, are you really THAT worried about the power output? just put it together, dyno it and be happy with whatever happens

[McRussellPants]

this is the worst thread i've ever seen.


i've seen up to 270whp from a T25 KA-T

mighta been a t28

honestly if you're being this ghetto, are you really THAT worried about the power output? just put it together, dyno it and be happy with whatever happens


Nah, you need to plot KA on a T25 compressor map, then consider how much the 40mm exhaust wheel is choking down the motor and then never drive your car ever because its packed full of Bill Nye videos and dyno sheets.

[louisdaboois]

this is the worst thread i've ever seen.


i've seen up to 270whp from a T25 KA-T

mighta been a t28



honestly if you're being this ghetto, are you really THAT worried about the power output? just put it together, dyno it and be happy with whatever happens

lol damn dude thats harsh...... t25 on a ka isnt ghetto.....

also, 280whp on t25 kat's have been achieved.

[whereda40at]

im running a sr20 with a 2.35 stroker and i made 280hp/281tp at 12 psi on a hks 2530 .86 a/r i can take it to 20 psi and will make more. so does that help??? im almost a 2.4 but with those numbers

[dirtdiggler666]

fuck i just wanted to see some t25 dyno sheets but

ill let you guys get back to fist fucking each other:ugh: