SR20 Head Thickness - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

YoungGun · 10-26-2009, 06:55 PM

Anyone know how thick the stock head is on a SR20?

I need to get my block machined and am trying to make sure the pistons wont hit the valves.

I have a 1.1mm head gasket, so maybe I can get away with it, just trying to make 100% sure first.

Thanks in advance.

YoungGun · 10-26-2009, 08:58 PM

Someone must know this information.

let5l1de · 10-26-2009, 09:18 PM

if im not mistaken, the maximum limit is .2mm. This number is figured by adding both the amounts of head and block resurfacing.

Examples:
.15mm head & .05mm block

or

.1mm head & .1mm block

~m

Hashiriya415 · 10-26-2009, 09:22 PM

137mm for S14 SR20DET head

Hashiriya415 · 10-26-2009, 09:27 PM

.2 is a limit for resurfacing but you can take away more, it's your timing, lift of the valves, and valve size that matters, and of course the piston if you changed to a different height or design

YoungGun · 10-26-2009, 09:46 PM

Alright thanks guys.

I was just wondering cause my head needed to be welded and decked already so I needed to measure it to see how much I will be able to take off the block.

Do you think the S13 and S14 are the same size?

let5l1de · 10-26-2009, 09:56 PM

Quote:

Originally Posted by Hashiriya415

.2 is a limit for resurfacing but you can take away more, it's your timing, lift of the valves, and valve size that matters, and of course the piston if you changed to a different height or design

lol

! everything matters when you go beyond the limit...

Just have your machinist give a recommended thickness of head gasket unless you trust your numbers.

Or, I can build your engine!

I have Chucks SR (my old blacktop) on lockdown when hes ready for moer power.

pm me if interested.

~m

YoungGun · 10-26-2009, 10:42 PM

And I just found out that stock headgaskets are 1.1mm.

God dammit.

Whatever i'll keep this one for another build.

YoungGun · 10-27-2009, 09:50 AM

Anyone else have a measurement for a s13 sr head?

10-26-2009, 06:55 PM	#1
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	SR20 Head Thickness Anyone know how thick the stock head is on a SR20? I need to get my block machined and am trying to make sure the pistons wont hit the valves. I have a 1.1mm head gasket, so maybe I can get away with it, just trying to make 100% sure first. Thanks in advance.

10-26-2009, 09:18 PM	#3
let5l1de Zilvia FREAK! Join Date: Dec 2007 Location: 626DRIFT, ca Posts: 1,420 Trader Rating: (30) Rides Gallery: let5l1de Feedback Score: 30 reviews	if im not mistaken, the maximum limit is .2mm. This number is figured by adding both the amounts of head and block resurfacing. Examples: .15mm head & .05mm block or .1mm head & .1mm block ~m __________________ GR Performance facebook Pics & More! Comments! http://www.facebook.com/pages/GR-Performance/120477531339202 Read My Sales Review 626 Friday Nights San Gabriel

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10-26-2009, 08:58 PM	#2
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	Someone must know this information.

10-26-2009, 09:22 PM	#4
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 37 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	137mm for S14 SR20DET head

10-26-2009, 09:27 PM	#5
Hashiriya415 Zilvia FREAK! Join Date: Jun 2007 Location: San Francisco Age: 37 Posts: 1,007 Trader Rating: (22) Feedback Score: 22 reviews	.2 is a limit for resurfacing but you can take away more, it's your timing, lift of the valves, and valve size that matters, and of course the piston if you changed to a different height or design

10-26-2009, 09:46 PM	#6
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	Alright thanks guys. I was just wondering cause my head needed to be welded and decked already so I needed to measure it to see how much I will be able to take off the block. Do you think the S13 and S14 are the same size?

10-26-2009, 10:42 PM	#8
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	And I just found out that stock headgaskets are 1.1mm. God dammit. Whatever i'll keep this one for another build.

10-27-2009, 09:50 AM	#9
YoungGun Post Whore! Join Date: Nov 2007 Location: 818-951 SoCal Posts: 3,961 Trader Rating: (23) Feedback Score: 23 reviews	Anyone else have a measurement for a s13 sr head?