Cautionary Question About Rev Limiters... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

AadosX · 10-07-2005, 06:17 AM

Ok, I've been literally searching about stuff all night, it's now 7 a.m. and I'm still reading.

I've come to a question though...

I'm putting a 96 KA24DE motor into an S13 chassis, so I'll be using the S13 ECU. What exactly is the reasoning for the lower redline in S14s? I just want to make sure that I won't hurt anything revving the motor to 7k (since it will be controlled by my S13 ecu... right?)

For the record, I might just be putting the S13 cams in the S14 motor as well, if that changes anything.

Thanks,
John

orion::S14 · 10-07-2005, 07:56 AM

S13 cams allow it to breather a little better up top...so they had a higher redline.

You won't hurt anything by taking a stock S14 motor to ~7000..it just won't make power up there as compared to an S14 motor with S13 cams.

Functionally, the S13 and S14 motors are identical...except for the cams and the head casting.

I take my S14 motor to 7500 regularly, under 12psi of boost...with no ill effects in +2 years. Before that, when I was N/A...it saw the same RPS...with S14 cam, S13 cams, a pair of S13 exhaust cams (248/248), and JWT cams.

It's safe, it's fine.

- Brian

Redsunz916 · 10-07-2005, 11:15 AM

u can run 2 exhaust cams? that sounds like a good idea, if it would work? any feedback?

projectRDM · 10-07-2005, 03:32 PM

Of course it works, didn't he just say that?

There's a ton of information about using the 248/248 setup, I bet if you search you might find it.

slivia-junkie · 10-07-2005, 06:13 PM

i have a question just to learn more about cars would a obd1 s13 ecu work with the 96 obd2 engine

theicecreamdan · 10-07-2005, 10:29 PM

swap the intake manifold, use the obd1 sensors and wiring harness.

ryan hagen · 10-08-2005, 01:16 AM

its hard to find, i found the installation instructions last night, and searched for 2 hours today and couldnt find it, the searching and finding depends on the right key words, i found a nice set of directions last night for the exhaust cam swap, couldnt find it today, s14 cams are colored differnt than s13 cams yes? green and orange are opposites for each?

AadosX · 10-09-2005, 07:48 PM

Um make your own threads! :P Actually yeah just search, I found that info 100 times over the other night...

Thanks to Russ and Brian for the info.

10-07-2005, 06:17 AM	#1
AadosX Zilvia Addict Join Date: Dec 2003 Location: Auburn University Posts: 959 Trader Rating: (0) Feedback Score: 0 reviews	Cautionary Question About Rev Limiters... Ok, I've been literally searching about stuff all night, it's now 7 a.m. and I'm still reading. I've come to a question though... I'm putting a 96 KA24DE motor into an S13 chassis, so I'll be using the S13 ECU. What exactly is the reasoning for the lower redline in S14s? I just want to make sure that I won't hurt anything revving the motor to 7k (since it will be controlled by my S13 ecu... right?) For the record, I might just be putting the S13 cams in the S14 motor as well, if that changes anything. Thanks, John

10-07-2005, 07:56 AM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	S13 cams allow it to breather a little better up top...so they had a higher redline. You won't hurt anything by taking a stock S14 motor to ~7000..it just won't make power up there as compared to an S14 motor with S13 cams. Functionally, the S13 and S14 motors are identical...except for the cams and the head casting. I take my S14 motor to 7500 regularly, under 12psi of boost...with no ill effects in +2 years. Before that, when I was N/A...it saw the same RPS...with S14 cam, S13 cams, a pair of S13 exhaust cams (248/248), and JWT cams. It's safe, it's fine. - Brian __________________ www.KA24DEvelopment.com

10-07-2005, 03:32 PM	#4
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 50 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Of course it works, didn't he just say that? There's a ton of information about using the 248/248 setup, I bet if you search you might find it. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

10-08-2005, 01:16 AM	#7
ryan hagen Zilvia FREAK! Join Date: Jan 2003 Location: rhinelander wisconsin Age: 41 Posts: 1,465 Trader Rating: (8) Feedback Score: 8 reviews	its hard to find, i found the installation instructions last night, and searched for 2 hours today and couldnt find it, the searching and finding depends on the right key words, i found a nice set of directions last night for the exhaust cam swap, couldnt find it today, s14 cams are colored differnt than s13 cams yes? green and orange are opposites for each? __________________ 1990 hatch ka24de gt2871r

10-07-2005, 11:15 AM	#3
Redsunz916 Zilvia Junkie Join Date: Dec 2004 Location: Sacramento Ca USA Posts: 403 Trader Rating: (0) Feedback Score: 0 reviews	u can run 2 exhaust cams? that sounds like a good idea, if it would work? any feedback?

10-07-2005, 06:13 PM	#5
slivia-junkie Leaky Injector Join Date: Jan 2005 Location: if you could tell me i would be most greatfull Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	i have a question just to learn more about cars would a obd1 s13 ecu work with the 96 obd2 engine

10-09-2005, 07:48 PM	#8
AadosX Zilvia Addict Join Date: Dec 2003 Location: Auburn University Posts: 959 Trader Rating: (0) Feedback Score: 0 reviews	Um make your own threads! :P Actually yeah just search, I found that info 100 times over the other night... Thanks to Russ and Brian for the info.