what the hell should timing be set at ka-t - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nd240sx3 · 08-30-2004, 10:46 PM

i know i searched, but all i could find on what i will be using which is 370cc injectors and safc. timeing should be ~16 what the hell is that and what should i put imimg too thanx oh and one more question. when i look up pulley sets for my motor, all i can come up with is 95-98. why is that? i thought they are the same motor which they are so can i use them thanx again 91 s13 hatch

orion::S14 · 08-30-2004, 10:57 PM

That means base timing should be 16 degrees before top dead center. The retards the whole timing curve by ~4 degrees...which is not ideal, but a cheap way to run boost safely without retuned ECUs or MSD BTM.

The pulley has marks:

|....|....|....|....|....|
-5..0...+5..10..15..20

To set the base timing, car should be warm, and you have to unplug the TPS and set the idle to ~700. Only way to set base timing properly...these steps disable the ECU control and keep it from messing with the timing,

Using the pin near the pulley, set the timing to the intended degree by rotating the distributor.

Stock is 20, so you need to knock is back a few degrees...you have to eyeball it.

That's it, pretty easy.

- Brian

orion::S14 · 08-30-2004, 10:58 PM

Oh...and the pulley's are the same...get an ASP from www.rpmoutlet.com for $100-110.

RedSuns · 08-30-2004, 11:01 PM

stock is 20?

of all the SRs that i have worked with the base timing is a rough 15BTDC

papershot · 08-30-2004, 11:33 PM

Quote:

Originally Posted by RedSuns

stock is 20?

of all the SRs that i have worked with the base timing is a rough 15BTDC

ka-t...

message length.

AN89HATCH · 08-31-2004, 12:55 AM

Im also doing a kat (sohc), i set my timing to 14 degrees, but Im only running an 8:1 fmu, fuel pump, and stock injectors , and 6lbs of boost so i needed it to be alittle more safe. When I unpluged my tps, my idle did not change, so i set the timing, and pluged it back in, and my idle stayed the same around 700-730 rpm Is the ka24e stock timing 17 degrees?

orion::S14 · 08-31-2004, 10:44 AM

Stock KA24E timing is 15...plus, the static compresison ratio is lower, so you don't need to drop the base as much to keep it safe.

At 6psi, I'd bet you're OK with just a degree or 2 of base retard (13-14 BTDC)...

- Brian

RedSuns · 08-31-2004, 10:21 PM

Quote:

Originally Posted by papershot

ka-t...

message length.

and the KA is that much different from a SR?

base timing is base timing....

orion::S14 · 09-01-2004, 07:16 AM

Quote:

Originally Posted by RedSuns

and the KA is that much different from a SR?

base timing is base timing....

YES!

Base timing is what the ECU uses to determine total timing advance...so if your base timing is off by 5 degrees, you'll either blow it up, or have no power.

Set your SR to 10 BTDC and see if you can make any decent power...even at 14psi.

Set your SR to 20 BTDC base and 14psi and you'll be buying a new block...

Base timing is CRITICAL for decent performance...

...and 1 degree of timing is actually a lot.

- Brian

PSI240SX · 09-01-2004, 07:16 AM

Red Suns- You are an idiot. They are two totally different motors, and they use totally different base timing values. Can you not accept that?

SR 15btdc

KA 20btdc

End of discussion.

Var · 09-01-2004, 10:28 AM

SOHC KA = 15ºBTDC
DOHC KA = 20ºBTDC

OT!!

Which leads me to believe that nissan was stupido for building the DOHC engine. They have a claimed 10 horsepower over the SOHC...but if you bumped the compression to what the DOHC has and up the timing 5 degrees, you'll find that extra 10 horses out of the single cam. All they had to do was re-design the cam for better high end.

lrb_2000 · 07-07-2005, 03:50 AM

^^ I agree...but from what i've read, the dohc has a stronger bottom end.. but I could be wrong...

NismoDan · 07-07-2005, 04:50 PM

I heard that the SOHC's had weak heads, and that the threads tend to strip.
Just what I've heard, I'm happy with my DE.

ledzeppelin240 · 07-09-2005, 05:04 PM

I have determined that the cam journal is one very delcate part of the head, but regular oil changes will save that. Other than that the head is designed quite well. Intake and Exhaust ports only are already pretty smooth but have two casting lines in them. I believe in the 12valve SOHC and by spring I will get 300+ HP out of it.

RedSuns · 07-14-2005, 10:17 AM

Quote:

Originally Posted by PSI240SX

Red Suns- You are an idiot. They are two totally different motors, and they use totally different base timing values. Can you not accept that?

SR 15btdc

KA 20btdc

End of discussion.

thanks for the fine comment

08-30-2004, 10:46 PM	#1
nd240sx3 Zilvia Junkie Join Date: Feb 2003 Location: warminster pa Age: 44 Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	what the hell should timing be set at ka-t i know i searched, but all i could find on what i will be using which is 370cc injectors and safc. timeing should be ~16 what the hell is that and what should i put imimg too thanx oh and one more question. when i look up pulley sets for my motor, all i can come up with is 95-98. why is that? i thought they are the same motor which they are so can i use them thanx again 91 s13 hatch

08-30-2004, 11:01 PM	#4
RedSuns Nissanaholic! Join Date: Jan 2002 Location: Northern VA Age: 43 Posts: 1,865 Trader Rating: (1) Feedback Score: 1 reviews	stock is 20? of all the SRs that i have worked with the base timing is a rough 15BTDC __________________ Johnathan 2005 Titan 1996 240SX 1991 240SX 1974 260Z 1996 Honda CBR 600 F3

08-31-2004, 12:55 AM	#6
AN89HATCH Zilvia Junkie Join Date: Oct 2003 Location: BAY AREA Posts: 393 Trader Rating: (0) Feedback Score: 0 reviews	Im also doing a kat (sohc), i set my timing to 14 degrees, but Im only running an 8:1 fmu, fuel pump, and stock injectors , and 6lbs of boost so i needed it to be alittle more safe. When I unpluged my tps, my idle did not change, so i set the timing, and pluged it back in, and my idle stayed the same around 700-730 rpm Is the ka24e stock timing 17 degrees? __________________ slide your ride.com

09-01-2004, 07:16 AM	#10
PSI240SX Zilvia Addict Join Date: Jul 2001 Location: The Gunshine State Age: 50 Posts: 843 Trader Rating: (0) Feedback Score: 0 reviews	Red Suns- You are an idiot. They are two totally different motors, and they use totally different base timing values. Can you not accept that? SR 15btdc KA 20btdc End of discussion. __________________ www.enjukuracing.com

09-01-2004, 10:28 AM	#11
Var Post Whore! Join Date: Sep 2003 Location: Norcal Age: 43 Posts: 5,032 Trader Rating: (0) Rides Gallery: Var Feedback Score: 0 reviews	SOHC KA = 15ºBTDC DOHC KA = 20ºBTDC OT!! Which leads me to believe that nissan was stupido for building the DOHC engine. They have a claimed 10 horsepower over the SOHC...but if you bumped the compression to what the DOHC has and up the timing 5 degrees, you'll find that extra 10 horses out of the single cam. All they had to do was re-design the cam for better high end. __________________ Hi

08-30-2004, 10:57 PM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	That means base timing should be 16 degrees before top dead center. The retards the whole timing curve by ~4 degrees...which is not ideal, but a cheap way to run boost safely without retuned ECUs or MSD BTM. The pulley has marks: \|....\|....\|....\|....\|....\| -5..0...+5..10..15..20 To set the base timing, car should be warm, and you have to unplug the TPS and set the idle to ~700. Only way to set base timing properly...these steps disable the ECU control and keep it from messing with the timing, Using the pin near the pulley, set the timing to the intended degree by rotating the distributor. Stock is 20, so you need to knock is back a few degrees...you have to eyeball it. That's it, pretty easy. - Brian

08-30-2004, 10:58 PM	#3
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Oh...and the pulley's are the same...get an ASP from www.rpmoutlet.com for $100-110.

08-31-2004, 10:44 AM	#7
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Stock KA24E timing is 15...plus, the static compresison ratio is lower, so you don't need to drop the base as much to keep it safe. At 6psi, I'd bet you're OK with just a degree or 2 of base retard (13-14 BTDC)... - Brian

07-07-2005, 03:50 AM	#12
lrb_2000 Join Date: May 2005 Location: wa Age: 38 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	^^ I agree...but from what i've read, the dohc has a stronger bottom end.. but I could be wrong...

07-07-2005, 04:50 PM	#13
NismoDan Zilvia Junkie Join Date: Feb 2004 Location: SF Posts: 310 Trader Rating: (0) Feedback Score: 0 reviews	I heard that the SOHC's had weak heads, and that the threads tend to strip. Just what I've heard, I'm happy with my DE. __________________ C4L #34

07-09-2005, 05:04 PM	#14
ledzeppelin240 Zilvia Addict Join Date: Sep 2003 Location: Sinse Posts: 688 Trader Rating: (0) Feedback Score: 0 reviews	I have determined that the cam journal is one very delcate part of the head, but regular oil changes will save that. Other than that the head is designed quite well. Intake and Exhaust ports only are already pretty smooth but have two casting lines in them. I believe in the 12valve SOHC and by spring I will get 300+ HP out of it. __________________ Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power. Looking for: JDM S13 OEM Sideskirts

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