S14 Head on S13 Block, possible? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*wafflez66* · 10-29-2006, 02:47 PM

Like the title says, my block is warped and possibly cracked, I have access to an s13 block is it possible to put them together, or is there any disadvantages? thanks.

nismoman · 10-29-2006, 03:02 PM

I dont personally know if they are compatible, but I do know that the s13 SR head flows better. They must have changed the s14 head some to help emmissions

*wafflez66* · 10-29-2006, 03:50 PM

I know the heads are different, the s14 w/ vvt and low port vs s13 high port, but I had heard that the blocks were interchangeable and was wondering if it was true or not.

johngriff · 10-29-2006, 10:47 PM

Oil passage design prevents the two heads on being compatible, more over, the s14 head SUCKS. VVT FTL!!

dct223 · 10-29-2006, 11:22 PM

Quote:

Originally Posted by johngriff

Oil passage design prevents the two heads on being compatible, more over, the s14 head SUCKS. VVT FTL!!

so what are your reasons for saying VVT is bad?

bardabe · 10-30-2006, 12:21 AM

Quote:

Originally Posted by dct223

so what are your reasons for saying VVT is bad?

bcause I would think after you get cams/ cam gears guess what.. bye bye vvt.

dct223 · 10-30-2006, 12:37 AM

Quote:

Originally Posted by bardabe

bcause I would think after you get cams/ cam gears guess what.. bye bye vvt.

IMO i dont think VTC on s14/s15 SR's is a bad thing.. My friend is running a s14sr, VTC makes up for what s13 sr's lack... not very good low end power.. (i hope you all know VTC is for low end.... not like honda's vtec)

I know he has beat modded s13 SR's on freeway and all he has on his s14 sr is a cone filter and a 3" exhaust..

thats my experience with vtc.... but im sure its useless when people build a high HP S14sr and get some crazy cam that ditches vtc.

97 S14 · 10-30-2006, 01:15 AM

You S14 SR haters dont know what your talking about. High port vs. low port is an insignificant issue. There's plenty of S14 SR's making power out there right with the S13 SR's. Do you think Nissan engineers would really redesign their engines to make them run less efficiently? I would say that any inefficiency they created by switching port designs would have more than made up for with the redesigned intake manifold. But we all put greddy intake manifolds on our motors anyways, so that's why its pretty much an insignificant difference as I see it.

*wafflez66* · 10-30-2006, 05:03 AM

you can buy cams and gears that are compatable w/ vvt, so that's not a problem... anyways, I don't really care if you like vvt or the s14 motor in general, all I am looking to know is if I can put my s14 head on an s13 block which if johngriff is correct is not possible due to oil passage differences, can anyone back him up?

bardabe · 10-30-2006, 01:36 PM

Quote:

Originally Posted by dct223

IMO i dont think VTC on s14/s15 SR's is a bad thing.. My friend is running a s14sr, VTC makes up for what s13 sr's lack... not very good low end power.. (i hope you all know VTC is for low end.... not like honda's vtec)

I know he has beat modded s13 SR's on freeway and all he has on his s14 sr is a cone filter and a 3" exhaust..

thats my experience with vtc.... but im sure its useless when people build a high HP S14sr and get some crazy cam that ditches vtc.

I didn;t say it was a bad thing altough if he is going ot build or mod his motor somewhat. the cams tend to snap after 350HP. the VTC will be useless waste of time and money.

Yellow4g63 · 10-31-2006, 02:01 AM

VVT is so last year. VVL now there is where the flow is.

91ka · 10-31-2006, 10:11 PM

Quote:

Originally Posted by dct223

IMO i dont think VTC on s14/s15 SR's is a bad thing.. My friend is running a s14sr, VTC makes up for what s13 sr's lack... not very good low end power.. (i hope you all know VTC is for low end.... not like honda's vtec)

I know he has beat modded s13 SR's on freeway and all he has on his s14 sr is a cone filter and a 3" exhaust..

thats my experience with vtc.... but im sure its useless when people build a high HP S14sr and get some crazy cam that ditches vtc.

so youre saying your friends running sr head with s14 (kade) block? which makes up for low end torque.
im guessing vtc is like vtec except its designed for low end torque?

dct223 · 10-31-2006, 10:19 PM

Quote:

Originally Posted by 91ka

so youre saying your friends running sr head with s14 (kade) block? which makes up for low end torque.
im guessing vtc is like vtec except its designed for low end torque?

ummmmm no... noo wehre did i say he was running some hybrid setup.. i said he is running a S14SR...

and yes... VTC is for low to mid range torque if i didnt write it clearly before...

240_hawaii · 10-31-2006, 10:21 PM

wait i thought that sr heads dont fit on ka blocks? i guess a hawaii sr must be diff.

91ka · 10-31-2006, 10:26 PM

s14sr sounded like sr head on an s14 (ka) block... lol sorry :hammer:

johngriff · 11-05-2006, 10:00 PM

Maybe i just was not being clear.

In VAST experience with japanese, austrailian and american tuners, the VVT cam lobe switching system, has had MAJOR issues when changing cam profile when the motor is outputting more thatn 350ftlbs of tq before and during the cam switch. It has been known for snapping cams. Port/Intake manifold profiles did not even come up here. You can correct this issue by using one of the readily available VVT killer kits.

I DONT want to get into any arguments over lag issues between these series. Mostly this is based on turbo and cam profiles, and a lack of preplanning when putting together a setup. DSG did quite a bit of preplanning with his settup and seems to have great response out of a Non VTC setup.

10-29-2006, 03:02 PM	#2
nismoman Zilvia Junkie Join Date: Jul 2005 Location: Bowie, MD Posts: 412 Trader Rating: (0) Feedback Score: 0 reviews	I dont personally know if they are compatible, but I do know that the s13 SR head flows better. They must have changed the s14 head some to help emmissions __________________

10-29-2006, 10:47 PM	#4
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Oil passage design prevents the two heads on being compatible, more over, the s14 head SUCKS. VVT FTL!! __________________ [email protected]

10-30-2006, 01:15 AM	#8
97 S14 Leaky Injector Join Date: Sep 2001 Posts: 94 Trader Rating: (0) Feedback Score: 0 reviews	You S14 SR haters dont know what your talking about. High port vs. low port is an insignificant issue. There's plenty of S14 SR's making power out there right with the S13 SR's. Do you think Nissan engineers would really redesign their engines to make them run less efficiently? I would say that any inefficiency they created by switching port designs would have more than made up for with the redesigned intake manifold. But we all put greddy intake manifolds on our motors anyways, so that's why its pretty much an insignificant difference as I see it. __________________ http://photos.freshalloy.com/gallery/v/97+S14/

10-31-2006, 02:01 AM	#11
Yellow4g63 Zilvia FREAK! Join Date: Jan 2003 Location: Socal Posts: 1,454 Trader Rating: (5) Feedback Score: 5 reviews	VVT is so last year. VVL now there is where the flow is. __________________ 95 240sx RB20 415whp 91 Nx2000 VVL yo

11-05-2006, 10:00 PM	#16
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Maybe i just was not being clear. In VAST experience with japanese, austrailian and american tuners, the VVT cam lobe switching system, has had MAJOR issues when changing cam profile when the motor is outputting more thatn 350ftlbs of tq before and during the cam switch. It has been known for snapping cams. Port/Intake manifold profiles did not even come up here. You can correct this issue by using one of the readily available VVT killer kits. I DONT want to get into any arguments over lag issues between these series. Mostly this is based on turbo and cam profiles, and a lack of preplanning when putting together a setup. DSG did quite a bit of preplanning with his settup and seems to have great response out of a Non VTC setup. __________________ [email protected]

10-31-2006, 10:21 PM	#14
240_hawaii Join Date: Jul 2006 Location: hawaii Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	wait i thought that sr heads dont fit on ka blocks? i guess a hawaii sr must be diff.

10-31-2006, 10:26 PM	#15
91ka Leaky Injector Join Date: Oct 2005 Location: CA Posts: 99 Trader Rating: (0) Feedback Score: 0 reviews	s14sr sounded like sr head on an s14 (ka) block... lol sorry :hammer: