What I'v done so far.....

Ross forged pistons ,248 degree duration cams from a 1996 altima,ported & polished my head ,turbo off a mits gsi made my own turbo manifold ,oil cooler from a crysler dynasty(same junk yard . I boost about 10 psi and get about 300 or so horse.
Go to Home Depot and by a Mig welder for about 200 bucks it will pay for its self trust me , also if you have a compound miter saw put a metel blade and you can cut a weld your heart away. www.straptech.com this is my Co. i was thinking of sewing 5 point harnesses ,later

 

How does that answer his question? lol

Seth, dont take this wrong in any way. But seems to me you should sit back and do your research first before building a na to a forced induction motor. A 250hp HIGH compression KA cannot transform to a 400hp low compression turbo KA.... thats unheard of. Its to different COMPLETELY different setups and platforms.

 

okay well then, let me rephraise. I want to build the engine for a turbo. I figure I can get the thing up to about 240 - 250 horse while it is n/a by using parts much like the ones listed here. www.ka24de.com
if I did all that engine work I figure it should be ready for some good boosting.

 

well building the motor for turbo w/o any head work you not gonna see any power gains at all really lol. When we lower compression to prepare for forced induction, we loose NA HP. 200whp is hard enough going all out NA, 240-250 as yo speak in almost unheard of w/o nitrous. If you wanna build a turbo motor with those parts your car is gonna be a turtle untill you force feed those combustion chambers.

 

Seth depending how many miles your Ka has should determine wether or not you should replace stock internals,KA stock has forged rods and crank all you need to do is replace pistons even then peps have turbo'd on all stock internals successfully n/p.
You may want to put stronger valve springs and retainers when you boost your Ka. but research is key ! keep reading before you do any thing . Later

 

.....where do you guys get this false info of parts in the KA? Why on earth would nissan put forged rods on a softy NA motor? The rods are not forged, last time I checked the crank wasnt either but CAN hold up to par.....

Edit: Let me mention you dont need stronger valves and springs for boost realy, mainly you need those for beefy ass cams or high revs.

 

Harte Nissan Hartford CT. head mech personaly showed me the internal specs of the KA24de and the internals are forged except pistons.if you dont believe take your own advice and research :happyfing

 

Well then I stand corrected, I still have a hard time believing it though. Although anything can be forged....paper clips for example lol. But this still doesnt mean upgrading isnt needed. But for 400hp, ive scene on stock rods, may not be the safest thing but maybe safer than I thought.

 

common knowledge dude, hes not pullin that outta his ass.

 

Well then I stand corrected, I still have a hard time believing it though. Although anything can be forged....paper clips for example lol. But this still doesnt mean upgrading isnt needed. But for 400hp, ive scene on stock rods, may not be the safest thing but maybe safer than I thought.

yeah they are forged...just like the SR ones are too.

btw getting 250rwhp from a N/A KA is going to KILL your bank account. you can do everything to your engine and still be around a SR power with exhaust, dp, front mount. guy tried it...same results.

 

I thought only the 94's and below have forged internals minus pistons and ka24e's have forged pistons to go with everything else. About your 250h.p. Na and then turn it in to a 400h.p. turbo you won't be able to do that. I have je forged pistons, p&p head, custom ground cams, valves etc. unorthodox crank pulley and the motor is only slightly faster than stock with out the turbo. I have weight reductions and removed the a/c and fan on the water pump to let the crank spin faster. So that could be why my car is faster than stock. It has 1pt. lower compression about 8:1 and I was surprised its even faster than the stock motor was I was expecting a big terd without the turbo.

 

question, say i got my engine worked over and then installed everything off of www.ka24de.com what kinda horse you think I would be pulling.
all the research that I have found says that the stuff on that site will allow the engine to rev higher and faster. being more throtle responce.
it also tells me that having that will mean it will be a more turbo happy engine.

 

common knowledge dude, hes not pullin that outta his ass.

ha, learn something everyday I guess. Never came across that info before.

Seth- even though you rev higher you wont make any power that high in the band. The stronger springs help prevent what is know as valve float at high RPM. We bought the s13 from a buddy of mine with a blown KA, had no compression. When I took the motor out and took off the exhaust manifold I found the valves in peices, not to mention a punched through piston 3 & 4. With stronger valve springs most likely this could have been avoided. Some turbo and NA application allow you to make power really high in the power band, so these springs are needed so you can reach that limit. Hope this helps.

 

yeah it does,
I just don't see how I can't make a 250 horse ka into a turbo motor.
someone said you can't take a high compression engine and make it turbo but what are these guys with the street bikes doing?
they have high compression and they throw turbo's on them.

 

Yea but with very little boost. The bike motors are square motors, the KA's however are far from it. Have you looked at some of our NA applications here? The work you have to do to make a KA reach just 200hp is more than a hassle, and a couple thousand to build. NA and Turbo motors dont compare, basically they are just 2 completely different types of applications.

 

yeah it does,
I just don't see how I can't make a 250 horse ka into a turbo motor.
someone said you can't take a high compression engine and make it turbo but what are these guys with the street bikes doing?
they have high compression and they throw turbo's on them.

Try getting 150k-250k miles without rebuild from a sportsbike... then when you get a fraction of that and have to rebuild your bike's motor, you've answered your own question

 

Seth, basically there isnt much aftermarket for the 240 to go NA up to 250, and the money youd spend just getting to 210 would prolly be enough for a turbo anyway. When people go for a high power NA, they have to raise the compression and advance the timing, but when when people go for a turbo, they lower it and retard the timing because the turbo would blow a motor really fast with high compression. Even with stock compression theres not much room for error, especially not enough room to go after the end numbers you want. Anythings possible if you have enough money... but you would basically be buying all the internals twice which would cost a ton of money. Your best option would be to buy a N02 kit on the classifieds and spray maybe 50 shot while you build your engine up for turbo, and as your engine gets more pieces maybe up the spray to 75 once you get your lower compression pistons and retard the timing, then just sell the kit back to someone else. This would waste a lot less money and still give you enough power now to wet your tongue while you save for a turbo.

 

alright so with a turbo 400 horse is a reasonable goal?
what kinda torque would we be looking at?

 

well building the motor for turbo w/o any head work you not gonna see any power gains at all really lol. When we lower compression to prepare for forced induction, we loose NA HP. 200whp is hard enough going all out NA, 240-250 as yo speak in almost unheard of w/o nitrous. If you wanna build a turbo motor with those parts your car is gonna be a turtle untill you force feed those combustion chambers.

I say that 250 is poissble, atully i say more then that. It just unheard of becasue no company make n/a parts. but never the less i engien that build for turbo, but has no turbo would bassically be abotu the same ass stock, becuse to low comp compent counter act every thing.

 

More than you can put down lol. Here are the dyno numbers from some decent KA-T guys.

390hp/352 tq (24psi)
435hp/ 391tq (22psi race fuel)
377hp/376tq (14psi)

 

More than you can put down lol. Here are the dyno numbers from some decent KA-T guys.

390hp/352 tq (24psi)
439hp/ 391tq (22psi race fuel)
377hp/376tq (14psi)

Wonder what caused the disparity between the numbers... the last one looks most realistic to me... at 22psi the gain is marginal compared to 14PSI and there was an equal torque trade off... that's really weird. I would think that anything in the 20PSI region would be about mid 400's HP. Maybe they had a really small turbo?

 

ahh.. I believe the word is "Tuning"

 

so unless i want to go for an engine that is a pain in the ass to drive around i should go and turbo this engine.

 

so unless i want to go for an engine that is a pain in the ass to drive around i should go and turbo this engine.

yeah because unless you have an unlimited supply of cash for parts and tuning, you'll never see 200hp n/a and if you do, you'll only be able to run about 5 psi of boost due to such high compression...plus you'll have to run the highest octane you can find and right now, with gas prices, that would suck majorly....just turbo it :thumbsup

 

Wonder what caused the disparity between the numbers... the last one looks most realistic to me... at 22psi the gain is marginal compared to 14PSI and there was an equal torque trade off... that's really weird. I would think that anything in the 20PSI region would be about mid 400's HP. Maybe they had a really small turbo?

Depends on which turbo and tuning of course. 10psi on a ko3 and 10psi on a t3 will give you completely different numbers. This is a good topic you created Seth