KA24DE Turbo Kits - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Zenki Two40 · 12-12-2001, 05:57 PM

okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?

*AceInHole* · 12-12-2001, 06:38 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Zenki Two40 on 5:57 pm on Dec. 12, 2001
okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?</td></tr></table><span id='postcolor'>

TY Yap with the FMax stage II kit on a stock S14 KA24DE is at 14.5 psi pulling 320 rwhp.
Most "stage I" kits will do something like 250 whp @ 7 lbs of boost.  The graphs shown are generally stock engines with just the kit, and possibly an exhaust.  I don't see why you should only boost at 4 psi if the fuel is handled correctly.  Technically that would be the limit of the 270 cc stock injectors, but IIRC, the FMax kit comes with 370 cc injectors and the means to control them... I.E. a JWT ECU, in which case you should have no problems turning up the boost.

BadMoJo · 12-12-2001, 10:13 PM

14.5 psi on stock motor?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> i thought the KAs limit was like 10psi. Wouldnt that require better internals?

12-12-2001, 11:10 PM

does getting better internals entail a re-build or is a re-build and getting better internals two different things?

uuninja · 12-12-2001, 11:52 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from BadMoJo on 10:13 pm on Dec. 12, 2001
14.5 psi on stock motor?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> i thought the KAs limit was like 10psi. Wouldnt that require better internals?
</td></tr></table><span id='postcolor'>

People thought the world was flat till Galileo went an proved them wrong. TY was running 10psi for a while and that was the estimated limit at the time. However he recently upped the boost to 13 or 14 psi.

*DSC* · 12-13-2001, 12:34 AM

The world isn't flat?

Archangel · 12-13-2001, 01:08 AM

learn somethin' new everyday, huh dsc... :biggrin:

If you get a boost controller, you can run 7 or 8 psi normally, then crank it up to 12 or even 14 when you really wanna run it (track, civic with only NOS stickers, or other neccessary occasions)

Archangel · 12-13-2001, 01:11 AM

Oh, and nismos14, upgrading or replacing internal would be part of a rebuilt, but upgrading internals alone would not really constitute a rebuild.  
However, if you're go as far upgrading internals, you might as well rebuild the engine.  They gotta take it most of the way apart anyway.

matic 240sx · 12-13-2001, 04:01 AM

the only way i would run like 14 psi on a KA motor is if i had ngk plugs, good valve springs and good chrome valves.. the stock ones would go to crap on 14 psi..

i think the pistons could take it for a while but.. i would get a boost controller and drive on like 5psi.. and race from 10-14 psi

uuninja · 12-13-2001, 07:33 AM

I don't think that the valves will give you too much trouble. Duy's s14 in TX ran a 10.9 at 20some PSI. They estimated 500 some HP to the wheels. He was using a stock KA head. The KA pistons however have very shallow ring lands and tend to be the weak link in the motor.

Zenki Two40 · 12-13-2001, 07:38 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from AceInHole on 8:38 pm on Dec. 12, 2001
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Zenki Two40 on 5:57 pm on Dec. 12, 2001
okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?</td></tr></table><span id='postcolor'>

TY Yap with the FMax stage II kit on a stock S14 KA24DE is at 14.5 psi pulling 320 rwhp.
Most "stage I" kits will do something like 250 whp @ 7 lbs of boost. The graphs shown are generally stock engines with just the kit, and possibly an exhaust. I don't see why you should only boost at 4 psi if the fuel is handled correctly. Technically that would be the limit of the 270 cc stock injectors, but IIRC, the FMax kit comes with 370 cc injectors and the means to control them... I.E. a JWT ECU, in which case you should have no problems turning up the boost.
</td></tr></table><span id='postcolor'>

that's cool, i didn't know that the fmax turbo kit came w/ upgraded 370cc injectors. so basically if my whole car was just stock w/ an exhaust n an fmax turbo kit, i could run 7psi when i'm driving then turn it up to like 10-14psi whenever needed? would there be ne problems that may occur if i wanted to keep it relatively stock for a long while, but still keep the boost at 7psi (what would need to be done, basic stuff)?

uuninja · 12-13-2001, 10:05 AM

No you cannot turn up the boost to 14psi on a stage 1 fmax. you have to remember that the 370cc injectors on the KA have to supply fuel for 25% more displacement than an SR. So where 14psi on a stock t25 or t28 turbo sr is about the max duty cycle for 370cc injectors. The KA will reach max duty of 370cc injectors at lower a much lower boost level. Not to mention the fact that the fmax uses a t3/t4 that will flow more air anyway. TY is using 500cc (or 52lbs MSD I don't remember which) injectors. Those have proven good up to 14 psi.

12-12-2001, 05:57 PM	#1
Zenki Two40 Zilvia Member Join Date: Dec 2001 Location: ... Posts: 285 Trader Rating: (0) Feedback Score: 0 reviews	okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?

12-12-2001, 06:38 PM	#2
AceInHole Autox Technician Join Date: Dec 2001 Location: New Haven, CT Age: 44 Posts: 3,961 Trader Rating: (0) Rides Gallery: AceInHole Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Zenki Two40 on 5:57 pm on Dec. 12, 2001 okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?</td></tr></table><span id='postcolor'> TY Yap with the FMax stage II kit on a stock S14 KA24DE is at 14.5 psi pulling 320 rwhp. Most "stage I" kits will do something like 250 whp @ 7 lbs of boost.  The graphs shown are generally stock engines with just the kit, and possibly an exhaust.  I don't see why you should only boost at 4 psi if the fuel is handled correctly.  Technically that would be the limit of the 270 cc stock injectors, but IIRC, the FMax kit comes with 370 cc injectors and the means to control them... I.E. a JWT ECU, in which case you should have no problems turning up the boost.

12-12-2001, 10:13 PM	#3
BadMoJo Nissanaholic! Join Date: Sep 2001 Location: San Luis Obispo, Ca Age: 43 Posts: 1,931 Trader Rating: (0) Feedback Score: 0 reviews	14.5 psi on stock motor?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> i thought the KAs limit was like 10psi. Wouldnt that require better internals?

12-12-2001, 11:10 PM	#4
Guest Posts: n/a	does getting better internals entail a re-build or is a re-build and getting better internals two different things?

12-12-2001, 11:52 PM	#5
uuninja Zilvia Addict Join Date: Dec 2001 Location: Reston, VA Age: 47 Posts: 812 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from BadMoJo on 10:13 pm on Dec. 12, 2001 14.5 psi on stock motor?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> i thought the KAs limit was like 10psi. Wouldnt that require better internals? </td></tr></table><span id='postcolor'> People thought the world was flat till Galileo went an proved them wrong. TY was running 10psi for a while and that was the estimated limit at the time. However he recently upped the boost to 13 or 14 psi.

12-13-2001, 12:34 AM	#6
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	The world isn't flat?

12-13-2001, 01:08 AM	#7
Archangel Zilvia Junkie Join Date: Sep 2001 Location: Cincinnati, OH Posts: 425 Trader Rating: (0) Feedback Score: 0 reviews	learn somethin' new everyday, huh dsc... :biggrin: If you get a boost controller, you can run 7 or 8 psi normally, then crank it up to 12 or even 14 when you really wanna run it (track, civic with only NOS stickers, or other neccessary occasions)

12-13-2001, 01:11 AM	#8
Archangel Zilvia Junkie Join Date: Sep 2001 Location: Cincinnati, OH Posts: 425 Trader Rating: (0) Feedback Score: 0 reviews	Oh, and nismos14, upgrading or replacing internal would be part of a rebuilt, but upgrading internals alone would not really constitute a rebuild.   However, if you're go as far upgrading internals, you might as well rebuild the engine.  They gotta take it most of the way apart anyway.

12-13-2001, 04:01 AM	#9
matic 240sx Join Date: Jul 2001 Location: las vegas Age: 42 Posts: 798 Trader Rating: (0) Rides Gallery: matic 240sx Feedback Score: 0 reviews	the only way i would run like 14 psi on a KA motor is if i had ngk plugs, good valve springs and good chrome valves.. the stock ones would go to crap on 14 psi.. i think the pistons could take it for a while but.. i would get a boost controller and drive on like 5psi.. and race from 10-14 psi

12-13-2001, 07:33 AM	#10
uuninja Zilvia Addict Join Date: Dec 2001 Location: Reston, VA Age: 47 Posts: 812 Trader Rating: (0) Feedback Score: 0 reviews	I don't think that the valves will give you too much trouble. Duy's s14 in TX ran a 10.9 at 20some PSI. They estimated 500 some HP to the wheels. He was using a stock KA head. The KA pistons however have very shallow ring lands and tend to be the weak link in the motor.

12-13-2001, 07:38 AM	#11
Zenki Two40 Zilvia Member Join Date: Dec 2001 Location: ... Posts: 285 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from AceInHole on 8:38 pm on Dec. 12, 2001 </span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Zenki Two40 on 5:57 pm on Dec. 12, 2001 okay, i've been seeing on this board that most turbo kits for the ka24de will give u like 230-250 hp to the ground. is this at 7psi? shouldn't u only be boosting about 4psi at first if u just bought the kit and had it installed? r the dynos that they've shown based on a stock ka motor w/ just their kit on it?</td></tr></table><span id='postcolor'> TY Yap with the FMax stage II kit on a stock S14 KA24DE is at 14.5 psi pulling 320 rwhp. Most "stage I" kits will do something like 250 whp @ 7 lbs of boost. The graphs shown are generally stock engines with just the kit, and possibly an exhaust. I don't see why you should only boost at 4 psi if the fuel is handled correctly. Technically that would be the limit of the 270 cc stock injectors, but IIRC, the FMax kit comes with 370 cc injectors and the means to control them... I.E. a JWT ECU, in which case you should have no problems turning up the boost. </td></tr></table><span id='postcolor'> that's cool, i didn't know that the fmax turbo kit came w/ upgraded 370cc injectors. so basically if my whole car was just stock w/ an exhaust n an fmax turbo kit, i could run 7psi when i'm driving then turn it up to like 10-14psi whenever needed? would there be ne problems that may occur if i wanted to keep it relatively stock for a long while, but still keep the boost at 7psi (what would need to be done, basic stuff)?

12-13-2001, 10:05 AM	#12
uuninja Zilvia Addict Join Date: Dec 2001 Location: Reston, VA Age: 47 Posts: 812 Trader Rating: (0) Feedback Score: 0 reviews	No you cannot turn up the boost to 14psi on a stage 1 fmax. you have to remember that the 370cc injectors on the KA have to supply fuel for 25% more displacement than an SR. So where 14psi on a stock t25 or t28 turbo sr is about the max duty cycle for 370cc injectors. The KA will reach max duty of 370cc injectors at lower a much lower boost level. Not to mention the fact that the fmax uses a t3/t4 that will flow more air anyway. TY is using 500cc (or 52lbs MSD I don't remember which) injectors. Those have proven good up to 14 psi.