Ka24det rebuild question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RomulanS13 · 01-21-2018, 10:06 PM

Im currently in doing a rebuild on my dual cam for ka-t stock spec everything pistons rods rings bearings. Should I adjust ring gap? Im re using pistons just replacing all the bearings and rings. Im planing on 8 to 10 psi

550cc
Rc enthalpy tuned ecu
Walbro 255 pump
Te04 turbo 60trim
Z32 maf blow through setup
Front mount ic

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tuzzio · 01-22-2018, 08:03 AM

If you're going that far why not buy pistons? You're really holding yourself back.

RomulanS13 · 01-22-2018, 08:45 AM

Quote:

Originally Posted by tuzzio

If you're going that far why not buy pistons? You're really holding yourself back.

Yeah understand that but right now im in a pinch and need it done asap this is the most cost effective for me at the moment and most of this was pretty much handed to me. So do you think i should gap the rings.

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EnnEssEnnKAT · 01-22-2018, 11:56 AM

My suggestion would be to at least see if the gap with all of the new rings installed is the same from piston to piston. Then cross reference your measurements with what is stated in the FSM.

RomulanS13 · 01-22-2018, 12:13 PM

Quote:

Originally Posted by EnnEssEnnKAT

My suggestion would be to at least see if the gap with all of the new rings installed is the same from piston to piston. Then cross reference your measurements with what is stated in the FSM.

Ok thanks thats exactly what i needed to here. Thanks bud.

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KAT-PWR · 01-22-2018, 08:54 PM

Gap at the very end of stock spec

ZaK687 · 01-23-2018, 10:40 AM

in my experience, stock pistons will fail at the ring lands. I got two weeks off my reused oem pistons, went supertech after that and ive been going strong for 3 years stock rods, t28 pushing 12psi. still I have been told many times that stock pistons can handle your setup and I dont doubt that. Why not go forged? its worth it.

***FaLKoN240*** · 01-23-2018, 10:45 AM

If you're going KA-T upgrade your pistons and ring landings AT LEAST. I blew out my ringlandings on my first or second drift event after install.

Save yourself the downtime. Do some searches. People are always selling KA pistons.

RomulanS13 · 01-23-2018, 10:57 AM

I really didnt want to but ill be going over sized with the look of fhe cylinder wall on cylinder 3. Forged it is but i just dont justify almost a grand on parts and a re-tune.20180122_152738.jpg

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Prince of Saiyans · 01-24-2018, 01:01 PM

The amount of money and quality of your work will affect the longevity of your build. I guessing you want your build to last. Spent the money. Get the right parts and tools.

EnnEssEnnKAT · 01-24-2018, 01:18 PM

You could pick up another good engine for the price of some nice pistons.

RomulanS13 · 01-24-2018, 10:08 PM

Thanks for your input guys Ive come to a conclusion and just part what I can and go sr which are more abundant here than the closest reliable ka which is 300 miles away.

Hoffman5982 · 01-24-2018, 11:36 PM

Quote:

Originally Posted by RomulanS13

I really didnt want to but ill be going over sized with the look of fhe cylinder wall on cylinder 3. Forged it is but i just dont justify almost a grand on parts and a re-tune.Attachment 102482

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Part of the game, unfortunately. I boosted my stock and super healthy KA(179psi across the board). Got it tuned conservatively and while it ran great for a month of daily driving, I blew the ringlands out the first event. I was only running 10psi on a 2871. Should have just gone with a forged bottom end to start because I would have saved money on parts alone, but now my $600 tune is rendered useless after only a month and I'll be spending almost the same amount to get it back on the dyno.

*anti tyler* · 01-24-2018, 11:41 PM

You're giving up? Pathetic. Take out a loan and sleeve that block. And stop coming up with excuses to cheap out and go another route. DO IT

www.superstreetonline.com/how-to/engine/0805-turp-ka24de-build-up/

tuzzio · 01-25-2018, 08:05 AM

I had a stock bore KA with wiseco pistons dropped in it last 3 years before the cylinders need to be bored out.

The $1,000 needed to make your ka last at 3-400whp is 1/2 of what you'll spend on an SR swap that stock vs stock is rated for the same HP internals wise.

*anti tyler* · 01-25-2018, 09:01 PM

Quote:

Originally Posted by tuzzio

I had a stock bore KA with wiseco pistons dropped in it last 3 years before the cylinders need to be bored out.

The $1,000 needed to make your ka last at 3-400whp is 1/2 of what you'll spend on an SR swap that stock vs stock is rated for the same HP internals wise.

I tried to destroy the first one I had, back in the day, as I was leaving for the military.

surely didn't spend $1000 nor was I able to successfully destroy the engine. just saying

01-21-2018, 10:06 PM	#1
RomulanS13 Join Date: Oct 2017 Location: near salty oceans Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Ka24det rebuild question Im currently in doing a rebuild on my dual cam for ka-t stock spec everything pistons rods rings bearings. Should I adjust ring gap? Im re using pistons just replacing all the bearings and rings. Im planing on 8 to 10 psi 550cc Rc enthalpy tuned ecu Walbro 255 pump Te04 turbo 60trim Z32 maf blow through setup Front mount ic Sent from my SM-G950U using Tapatalk Last edited by RomulanS13; 01-22-2018 at 05:45 PM..

01-22-2018, 08:54 PM	#6
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	Gap at the very end of stock spec __________________ MRP Manufacturing

01-23-2018, 10:45 AM	#8
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SF Bay Area Posts: 16,761 Trader Rating: (73) Feedback Score: 73 reviews	If you're going KA-T upgrade your pistons and ring landings AT LEAST. I blew out my ringlandings on my first or second drift event after install. Save yourself the downtime. Do some searches. People are always selling KA pistons. __________________ Best way to do business with me? Make your best offer FIRST.

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01-22-2018, 08:03 AM	#2
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	If you're going that far why not buy pistons? You're really holding yourself back.

01-22-2018, 11:56 AM	#4
EnnEssEnnKAT Zilvia Junkie Join Date: Sep 2014 Location: New Hampshire Posts: 427 Trader Rating: (13) Feedback Score: 13 reviews	My suggestion would be to at least see if the gap with all of the new rings installed is the same from piston to piston. Then cross reference your measurements with what is stated in the FSM.

01-23-2018, 10:40 AM	#7
ZaK687 Zilvia Addict Join Date: Apr 2013 Location: LIVERMORE, CA Posts: 838 Trader Rating: (16) Feedback Score: 16 reviews	in my experience, stock pistons will fail at the ring lands. I got two weeks off my reused oem pistons, went supertech after that and ive been going strong for 3 years stock rods, t28 pushing 12psi. still I have been told many times that stock pistons can handle your setup and I dont doubt that. Why not go forged? its worth it.

01-23-2018, 10:57 AM	#9
RomulanS13 Join Date: Oct 2017 Location: near salty oceans Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	I really didnt want to but ill be going over sized with the look of fhe cylinder wall on cylinder 3. Forged it is but i just dont justify almost a grand on parts and a re-tune.20180122_152738.jpg Sent from my SM-G950U using Tapatalk

01-24-2018, 01:01 PM	#10
Prince of Saiyans Join Date: Jan 2018 Location: Phoenix AZ Age: 31 Posts: 32 Trader Rating: (2) Feedback Score: 2 reviews	The amount of money and quality of your work will affect the longevity of your build. I guessing you want your build to last. Spent the money. Get the right parts and tools.

01-24-2018, 01:18 PM	#11
EnnEssEnnKAT Zilvia Junkie Join Date: Sep 2014 Location: New Hampshire Posts: 427 Trader Rating: (13) Feedback Score: 13 reviews	You could pick up another good engine for the price of some nice pistons.

01-24-2018, 10:08 PM	#12
RomulanS13 Join Date: Oct 2017 Location: near salty oceans Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for your input guys Ive come to a conclusion and just part what I can and go sr which are more abundant here than the closest reliable ka which is 300 miles away.

01-25-2018, 08:05 AM	#15
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	I had a stock bore KA with wiseco pistons dropped in it last 3 years before the cylinders need to be bored out. The $1,000 needed to make your ka last at 3-400whp is 1/2 of what you'll spend on an SR swap that stock vs stock is rated for the same HP internals wise.