Is a RB / KA Similar? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Wolf Mxbee · 08-14-2020, 01:18 AM

After amounts of research, I can?t find the answer I need, so to start I have a 1995 Lexus SC400 that I?ll be swapping a ?KA? into and yes I can go CD but have friends who bash on their stock UZ?s with KA trannies and hold up pretty well Lol. I have an excellent offer for a RB20DET Tranny with all new seals and bearings cheaper then a used KA24DE. I know the bellhousings are different but are they longer? If I were to swap a KA bellhousing then essentially it?ll be the same tranny correct? Also heard people say they used stock 240SX KA driveline and some say it won?t work? Are the output shafts the same? The lengths of the trannies the same too?

***Future240*** · 08-25-2020, 08:43 PM

Was in mod que

inferno s14 · 08-26-2020, 06:12 AM

a KA’s boosted performance is best expressed through a lightweight chassis, any chassis close to a sub-ton weight. you will need the proper gearing on the diff and the proper gearing on the transmission to compensate for the 300zx heaviness, piston compression will need to bump up aswell.fitment is the easiest thing, it will fit, getting the most out the KA on that chassis is the challenge.

silviaks2nr · 08-26-2020, 06:49 AM

F that put a JZ in it. WAY simpler, way better.

S14rebuild · 08-26-2020, 08:25 AM

Ka and rb20 are almost identical..shifter placement is in same location on an s chassis

KA24DESOneThree · 08-26-2020, 08:28 AM

https://zilvia.net/f/showthread.php?t=183121

https://zilvia.net/f/showthread.php?t=501158

https://zilvia.net/f/showthread.php?t=63529

08-14-2020, 01:18 AM	#1
Wolf Mxbee Join Date: Dec 2016 Location: Los Angeles, California Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	Is a RB / KA Similar? After amounts of research, I can?t find the answer I need, so to start I have a 1995 Lexus SC400 that I?ll be swapping a ?KA? into and yes I can go CD but have friends who bash on their stock UZ?s with KA trannies and hold up pretty well Lol. I have an excellent offer for a RB20DET Tranny with all new seals and bearings cheaper then a used KA24DE. I know the bellhousings are different but are they longer? If I were to swap a KA bellhousing then essentially it?ll be the same tranny correct? Also heard people say they used stock 240SX KA driveline and some say it won?t work? Are the output shafts the same? The lengths of the trannies the same too?

08-26-2020, 06:49 AM	#4
silviaks2nr Nissanaholic! Join Date: Nov 2004 Location: SC Posts: 2,105 Trader Rating: (10) Feedback Score: 10 reviews	F that put a JZ in it. WAY simpler, way better. __________________ '98 240sx 5spd

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08-26-2020, 06:12 AM	#3
inferno s14 Zilvia Junkie Join Date: Sep 2008 Location: NYC Age: 31 Posts: 461 Trader Rating: (8) Feedback Score: 8 reviews	a KA’s boosted performance is best expressed through a lightweight chassis, any chassis close to a sub-ton weight. you will need the proper gearing on the diff and the proper gearing on the transmission to compensate for the 300zx heaviness, piston compression will need to bump up aswell.fitment is the easiest thing, it will fit, getting the most out the KA on that chassis is the challenge.

08-26-2020, 08:25 AM	#5
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Ka and rb20 are almost identical..shifter placement is in same location on an s chassis

08-26-2020, 08:28 AM	#6
KA24DESOneThree Nissanaholic! Join Date: Feb 2004 Location: SD County SoCal Age: 35 Posts: 2,441 Trader Rating: (2) Rides Gallery: KA24DESOneThree Feedback Score: 2 reviews	https://zilvia.net/f/showthread.php?t=183121 https://zilvia.net/f/showthread.php?t=501158 https://zilvia.net/f/showthread.php?t=63529