it has nothing to do with actual boost pressure. its how much horsepower can a stock motor handle. it seems like the ka24de can handle up to around 350hp with GOOD fuel management.

 

No, actually it up the the fuel octane level. I've done 1.3 bar on the dyno with 97 octane, but I dont' recommend it to anyone.

1.0bar is safe on 91 octane. Just becareful in the summer.

 

in general 12 psi is the max to be safe.

 

is that with stand alone?

 

7-9 psi would be MAX on stock internals if you dont want to put a rod threw the block. 9.5:1 comp is high,this doesnt mean you cant run 10-14.5 psi but you can also fix eggs with your feet but it doesnt mean its to be done that way!trust me its alot cheaper to buy some good 8.1-8.5:1 comp pistons and some good connecting rods than it is to go threw 3-4 engines and then get rods and pistons.dont be dumb do it the right way. 7-9 psi and you wont have any problems!!!!

 

There is a dude some where ( here or nico I can't remember ) boostin like 15 lbs with 350 whp for like 2 years now, on stock internals. I guess he has that shit tuned just right

 

i would say lucy is more like it!i have a 97 and in my opinion 8 psi is still pretty fast im not going to risk killing my baby to go a little faster, ill wait for some lower comp pistons. plus ive heard from numerous sources,i.e.nsport,f-max,and others that 7-9 is the limit, without drastically reducing reliability.

 

7-9 psi would do good, because u still get the pushed to the seat excitement but ur engine isnt pushed to the limits.

 

I dont know. What's lucy?

 

7-9 psi is NOWHERE near the limits of the KA on stock internals. If anything breaks it will be the pistons anyway not the rods. Prevent detonation and there is no reason this motor shouldn't be able to handle 350-400whp without ever touching the longblock.

 

there is more then one person who has 350hp on stock internals, it can and is being done everyday. Unstable-hybrids.com go to projects and he's the second car. He is a member on this forum and is making 347whp on jim wolf stage 2 ecu on stock internals. Nice, respectable car.

 

you refer to him as the second car running that much boost on stock internals,but how many have expierienced detonation with more than 8psi on stock internals?if you want to dance on a knifes edge go ahead,my lucks not that good.

 

Notice also that all the people running that amount on stock internals either have a JWT ECU or an EMS. Conservative tuning is what it takes. Your not gonna get there with an S-AFC or hacked MAF, so in a sense meangreen is right.

 

all im saying is that if your going to run more than 7-9 psi on stock internals you better have the right set up and you better make shure you tune it right or its gonna blow!!!!!!!!!!

 

but you could blow ur motor at 3-5psi if u tried! the question is what would max boost pressure be. I quess the right answer to that would be, "How much money you got?"

 

well you guys do what you want,you ask how much is to much boost for stock internals,let me be the first to say "i dont want to know" becuase to truely find out somethings gotta blow!!!!!!!!!!hey that rhymed

 

well you guys do what you want,you ask how much is to much boost for stock internals,let me be the first to say "i dont want to know" becuase to truely find out somethings gotta blow!!!!!!!!!!hey that rhymed

but at the same time... there is a known limit as far as the highest boost level someone has gone to without blowing the engine (meaning it's 1. safe, and 2. as high as anyone can say).
as for longevity: 2 years at ~15psi, daily and track driven, with a setup that can be bought "off the shelf" from FMax (meaning it's nothing special or something that only a certain individual can get). this is a motor the owner WANTS to kill (so he can install the fully prepped engine waiting to go in) but just hasn't been able to.

basically: answer to this date is ~15psi reliably.

 

On pump gas, and stock compression, 17-18 is about the limit..i'm talking physics, not just how well you tune it. But it's been shown that a stock KA can take 15psi for extended periods of time.

 

Run an alcohol injection kit and I'm sure you can go over 20psi on stock internals haha. :1bowdown

 

4 years is how long my stock internal KA has been boosted. It's been running at 15psi for the past 2 years... Track driven (road race, not drag, nor street race), and drifting.

Yes, I have a built engine that has been sitting for over 1 year now.... This damn engine won't die!!!

 

4 years is how long my stock internal KA has been boosted. It's been running at 15psi for the past 2 years... Track driven (road race, not drag, nor street race), and drifting.

Yes, I have a built engine that has been sitting for over 1 year now.... This damn engine won't die!!!

lol see what 20psi does...im sure it will die just fine

 

The engine has done 1.3 bar on the dyno before. Nothing...

 

1.3 bar on stock internals, is awesome. What a ride that must be. So why is the ka24 so underated if so many people can boost like that?

 

Hype.

 

Because the SR is the god of all engines...everyone knows that.

RWD turbo KAs hit 350rwhp on stock bottom ends before RWD SRs did...by about a year!