black top head on red top block? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

heiyuu · 09-20-2008, 11:33 PM

Hey Guise:
So the story goes, I have a chuki 180sx with a kouki (finned block)redtop sr20det. So of you might recall I bought ray's turbo and head set up.
Well the head if from a s14 or s15 black top. I am assuming all sr20det parts are interchangable, but I have some Q's?

1.) I just wanna check and ask if the blacktop head I bought off him is a direct bolt onto my redtop head?
2.) Also, will I get the VTC feature?
3.) I think the valve covers bolts on differently (so I wont be able to use my red valve on the blacktop head), can anyone confirm?
- Alan

edited - forgot to mention his blacktop is from a s14 or s15.

cc4usmc · 09-20-2008, 11:40 PM

So you're just trying to put a blacktop head on a redtop block...correct? iirc s14 sr's had the vtc not s13 sr's but the blacktop heads do flow better then the red top...iirc lol...

blu808 · 09-21-2008, 12:01 AM

no difference in red/blacktop bolt patterns and mounting. s14 srs g=had the vtc and are identified by the sloping valve cover, and the hump in the front for the vtc.

From what I recall the s14 head will bolt up, but the intake manifolds are different. Also good luck on trying to get the vtc to work.

Luke

heiyuu · 09-21-2008, 01:01 AM

Ugh hey sorry guise forgot to mention the blacktop is from an s14 or s15 sr20det.

And yes I am trying to put the s14/15 head onto my s13 block.

blu808 · 09-21-2008, 01:11 AM

S14 and s15 heads are different. I would just stick with an s13 head. What is making you set on using this head? Is it port work? Or the vtc? You would loose the vtc anyways on a built engine.

Luke

s13dan · 09-21-2008, 01:27 AM

You know, i have heard of framkenstein motors in hondas. Like A H22 head on an H23 Block and rotating assembly, but thats a lil different. I say try it, you might have a great motor set up.

blu808 · 09-21-2008, 03:37 AM

Or you might have a different cam height and collide the valves into the pistons.

Either way fails in approach.

Phaze*2_Mizzark · 09-21-2008, 07:07 AM

Quote:

Originally Posted by blu808

Or you might have a different cam height and collide the valves into the pistons.

Either way fails in approach.

hahaha... sounds promising.. lol.. gl with your head swap...

*fliprayzin240sx* · 09-21-2008, 03:55 PM

VTC is gone on that head man, If you look at the intake cams, none of them have the VTC sprocket on them.

heiyuu · 09-21-2008, 06:02 PM

Quote:

Originally Posted by fliprayzin240sx

VTC is gone on that head man, If you look at the intake cams, none of them have the VTC sprocket on them.

I don't really care about the VTC feature, just thought it'd be cool to have. No biggie.

More importantly though... ur head will work on my block no probs???

an0therh22 · 11-22-2008, 12:19 AM

i have a redtop block with a s14 head. i didnt realize it till i yanked the motor out and my friend pointed it out. well it was running perfectly fine internal wise. i just had an oil leak on my front cover, bad turbo, annoying tob. i bought the car like that so i dont know what all it took it mate it but i think its direct bolt in. i will let you know once i take the head off.

LongGrain · 11-22-2008, 12:22 AM

i was under the impression the cooling passages were different between SR generations..

Dousan_PG · 11-22-2008, 12:26 AM

doesnst work
i think i read this on FA like..shit
2001

Sileighty_85 · 11-22-2008, 01:57 AM

You can rock an S14 Block with Red top Head
This guy did it.

Short Blocks are exactly the same with a few small difference, Oil pumps, Oil pick up...

s13 @ fullboost · 11-22-2008, 02:05 AM

^^^ I like that a lot actually

khmerpimpin · 11-26-2008, 03:58 PM

Quote:

Originally Posted by Sileighty_85

You can rock an S14 Block with Red top Head
This guy did it.

Short Blocks are exactly the same with a few small difference, Oil pumps, Oil pick up...

so would you need to change the oil pumps and pick up for it work? I have a zenki s14 blacktop, but I came across a fully built redtop head that I was interested in picking up, how would I make it work?

Om1kron · 11-26-2008, 04:07 PM

lol people trying to piece together engines with minimal knowledge of both heads and blocks are fail.

If you dont experiment you will never know... The s14 blacktop head from what I've seen will fit fine, but the vtc will not work thus making it useless to swap over if your intent was to use that head for the particular features it offered.

As far as the head flowing better it's a minimal difference on top of the intake manifold being different between the two motors.

find a bare redtop head, and have headwork done to it, and tell people you thought that would be even cooler to have than a ballsack working off of one nut instead of two.

mobilesuit818 · 11-26-2008, 04:12 PM

I remembering reading SE-R guys doing the VTC swap and having it work.

Its simple actually, you would need the MSD control box just like how the honda boys do it.

Let me see if I can find it.

If it works on a FF (Sentra) and it should work on the FR platforms as well.

09-20-2008, 11:33 PM	#1
heiyuu Zilvia Addict Join Date: Jun 2007 Location: winnipeg Age: 39 Posts: 875 Trader Rating: (6) Feedback Score: 6 reviews	black top head on red top block? Hey Guise: So the story goes, I have a chuki 180sx with a kouki (finned block)redtop sr20det. So of you might recall I bought ray's turbo and head set up. Well the head if from a s14 or s15 black top. I am assuming all sr20det parts are interchangable, but I have some Q's? 1.) I just wanna check and ask if the blacktop head I bought off him is a direct bolt onto my redtop head? 2.) Also, will I get the VTC feature? 3.) I think the valve covers bolts on differently (so I wont be able to use my red valve on the blacktop head), can anyone confirm? - Alan edited - forgot to mention his blacktop is from a s14 or s15. __________________ Last edited by heiyuu; 09-21-2008 at 12:59 AM..

09-21-2008, 12:01 AM	#3
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 42 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	no difference in red/blacktop bolt patterns and mounting. s14 srs g=had the vtc and are identified by the sloping valve cover, and the hump in the front for the vtc. From what I recall the s14 head will bolt up, but the intake manifolds are different. Also good luck on trying to get the vtc to work. Luke __________________

09-21-2008, 01:01 AM	#4
heiyuu Zilvia Addict Join Date: Jun 2007 Location: winnipeg Age: 39 Posts: 875 Trader Rating: (6) Feedback Score: 6 reviews	Ugh hey sorry guise forgot to mention the blacktop is from an s14 or s15 sr20det. And yes I am trying to put the s14/15 head onto my s13 block. __________________

09-21-2008, 01:11 AM	#5
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 42 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	S14 and s15 heads are different. I would just stick with an s13 head. What is making you set on using this head? Is it port work? Or the vtc? You would loose the vtc anyways on a built engine. Luke __________________

09-21-2008, 01:27 AM	#6
s13dan Zilvia FREAK! Join Date: Aug 2003 Location: Springfield, Mo Posts: 1,519 Trader Rating: (2) Feedback Score: 2 reviews	You know, i have heard of framkenstein motors in hondas. Like A H22 head on an H23 Block and rotating assembly, but thats a lil different. I say try it, you might have a great motor set up. __________________ 89 240sx hatch #933-the hot rod 91 240sx coupe #131,603-the daily

09-21-2008, 03:37 AM	#7
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 42 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	Or you might have a different cam height and collide the valves into the pistons. Either way fails in approach. __________________

09-21-2008, 03:55 PM	#9
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	VTC is gone on that head man, If you look at the intake cams, none of them have the VTC sprocket on them. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

11-22-2008, 12:19 AM	#11
an0therh22 Leaky Injector Join Date: Sep 2008 Location: louisiana Age: 37 Posts: 132 Trader Rating: (0) Feedback Score: 0 reviews	i have a redtop block with a s14 head. i didnt realize it till i yanked the motor out and my friend pointed it out. well it was running perfectly fine internal wise. i just had an oil leak on my front cover, bad turbo, annoying tob. i bought the car like that so i dont know what all it took it mate it but i think its direct bolt in. i will let you know once i take the head off.

11-22-2008, 12:22 AM	#12
LongGrain Post Whore! Join Date: Sep 2006 Location: Midwest Posts: 2,741 Trader Rating: (5) Feedback Score: 5 reviews	i was under the impression the cooling passages were different between SR generations..

11-22-2008, 12:26 AM	#13
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	doesnst work i think i read this on FA like..shit 2001 __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

11-22-2008, 01:57 AM	#14
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	You can rock an S14 Block with Red top Head This guy did it. Short Blocks are exactly the same with a few small difference, Oil pumps, Oil pick up... __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

11-22-2008, 02:05 AM	#15
s13 @ fullboost Post Whore! Join Date: Dec 2007 Location: St.Petersburg,FL Posts: 2,550 Trader Rating: (15) Feedback Score: 15 reviews	^^^ I like that a lot actually __________________

11-26-2008, 04:07 PM	#17
Om1kron Post Whore! Join Date: Sep 2004 Location: Granada Hills, CA Age: 44 Posts: 6,992 Trader Rating: (15) Feedback Score: 15 reviews	lol people trying to piece together engines with minimal knowledge of both heads and blocks are fail. If you dont experiment you will never know... The s14 blacktop head from what I've seen will fit fine, but the vtc will not work thus making it useless to swap over if your intent was to use that head for the particular features it offered. As far as the head flowing better it's a minimal difference on top of the intake manifold being different between the two motors. find a bare redtop head, and have headwork done to it, and tell people you thought that would be even cooler to have than a ballsack working off of one nut instead of two. __________________ Wayne Edwards https://om1kron.blogspot.com

11-26-2008, 04:12 PM	#18
mobilesuit818 Zilvia Member Join Date: Jun 2003 Location: USA Posts: 269 Trader Rating: (2) Feedback Score: 2 reviews	I remembering reading SE-R guys doing the VTC swap and having it work. Its simple actually, you would need the MSD control box just like how the honda boys do it. Let me see if I can find it. If it works on a FF (Sentra) and it should work on the FR platforms as well. __________________ Quality is not expensive, its priceless.

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