SR20DET differences - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Fuego · 03-02-2014, 01:30 PM

As dorkidori said, there were a few redtops with fins. Mine wasn't head swapped either, still has the stock head gasket, and is running on the 62 ECU that came with it.

KiLLeR2001 · 03-02-2014, 06:23 PM

That is the only explanation then. It appears the same part number was used across all S13 heads so they never did change it when they switched to the fin design.

e1_griego · 03-02-2014, 06:28 PM

I have a finned redtop, too, and seen a handful of others over the years.

sleepyS14se · 03-03-2014, 08:08 AM

I just picked up my s13 sr20det swap yesterday and it has the fins on the head.

I assume my engine is the 94 to 98 version blacktop?
One other thing... once i did a bit of research it looks like 180sx were built up to 1998 in japan?? Does that mean in 95 to 98 nissan of japan offered s13 and s14 chassis?? That just struck me as odd, I thought in 95 the s13 was replaced by s14s... can anyone clarify?

***Future240*** · 03-03-2014, 08:10 AM

If I am not mistaken, the 180sx (our hatchack) was made until 98 in Japan. The S13 Silvia(our coupe) was replaced by the zenki s14.

180sx =/= silvia.

sleepyS14se · 03-03-2014, 08:28 AM

so lets say.... in 1997 for example... You could buy a S13 hatchback BRAND new off the lot....as well as a s14??

i swear man the japanese do strange things... In comparison to here in america once a generation is evolved to a new body style the older previous body is no longer sold.

***dorkidori_s13*** · 03-03-2014, 08:52 AM

Quote:

Originally Posted by sleepyS14se

so lets say.... in 1997 for example... You could buy a S13 hatchback BRAND new off the lot....as well as a s14??

i swear man the japanese do strange things... In comparison to here in america once a generation is evolved to a new body style the older previous body is no longer sold.

the 180sx was available until late 98 brand new. it was kept in nissans lineup because sales never faltered and were always stable! So yes, your assumptions are correct. you could purchase a 180sx brand new at the same time you could buy a brand new S14 kouki.

mewantkouki · 03-03-2014, 09:18 AM

If redtop Sr20's have 54C cast into the pistons, all of these engines are officially the same internally aside from different heads. Seriously who the fuck cares about plastic vs metal back timing chain guides. It's a service part. All of the pistons and rods melt and bend in the same exact way in all of these engines.

The head is the only difference.

If you don't believe me put an s14 / s15 SR head on an s13 block and run an external oil feed to the VTC gear. There won't be any performance gain or loss compared to an oem s14 sr. (Using identical engine management / fuel / turbo setup) I'd bet money on it.

03-02-2014, 01:30 PM	#31
Fuego Zilvia Addict Join Date: Nov 2011 Location: Las Vegas Age: 35 Posts: 629 Trader Rating: (0) Feedback Score: 0 reviews	As dorkidori said, there were a few redtops with fins. Mine wasn't head swapped either, still has the stock head gasket, and is running on the 62 ECU that came with it. __________________

03-02-2014, 06:23 PM	#32
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	That is the only explanation then. It appears the same part number was used across all S13 heads so they never did change it when they switched to the fin design. __________________

03-03-2014, 08:08 AM	#34
sleepyS14se Zilvia Addict Join Date: Jul 2013 Location: Georgia Age: 35 Posts: 880 Trader Rating: (3) Feedback Score: 3 reviews	I just picked up my s13 sr20det swap yesterday and it has the fins on the head. I assume my engine is the 94 to 98 version blacktop? One other thing... once i did a bit of research it looks like 180sx were built up to 1998 in japan?? Does that mean in 95 to 98 nissan of japan offered s13 and s14 chassis?? That just struck me as odd, I thought in 95 the s13 was replaced by s14s... can anyone clarify? __________________ 95 S14 se RB25DET 348whp

03-03-2014, 08:28 AM	#36
sleepyS14se Zilvia Addict Join Date: Jul 2013 Location: Georgia Age: 35 Posts: 880 Trader Rating: (3) Feedback Score: 3 reviews	so lets say.... in 1997 for example... You could buy a S13 hatchback BRAND new off the lot....as well as a s14?? i swear man the japanese do strange things... In comparison to here in america once a generation is evolved to a new body style the older previous body is no longer sold. __________________ 95 S14 se RB25DET 348whp

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03-02-2014, 06:28 PM	#33
e1_griego Post Whore! Join Date: Sep 2004 Location: Independence, Ore. Age: 40 Posts: 2,722 Trader Rating: (24) Feedback Score: 24 reviews	I have a finned redtop, too, and seen a handful of others over the years.

03-03-2014, 09:18 AM	#38
mewantkouki Zilvia FREAK! Join Date: Nov 2007 Location: Orlando, Fl Age: 38 Posts: 1,250 Trader Rating: (36) Feedback Score: 36 reviews	If redtop Sr20's have 54C cast into the pistons, all of these engines are officially the same internally aside from different heads. Seriously who the fuck cares about plastic vs metal back timing chain guides. It's a service part. All of the pistons and rods melt and bend in the same exact way in all of these engines. The head is the only difference. If you don't believe me put an s14 / s15 SR head on an s13 block and run an external oil feed to the VTC gear. There won't be any performance gain or loss compared to an oem s14 sr. (Using identical engine management / fuel / turbo setup) I'd bet money on it.