Engine build help. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s13_st · 04-01-2014, 11:51 AM

This is my first time building an engine. Everyone's gotta start somewhere so please don't say "if you don't know what you're doing then you shouldn't be building". Anyways, questions are: when i change pistons and rods, stock stroke and compression, do I have to do readjustments such as balancing the bottom end. And do I need a thicker head gasket with 256 Degree 11.50mm Lift in/ex cams, and if I do, what thickness?

801nismo104 · 04-01-2014, 11:58 AM

headgasket thickness depends on how much material has been removed from the deck of the block and head and what compression ratio you want.

801nismo104 · 04-01-2014, 11:59 AM

just use standard size if you're doing a basic build

s13_st · 04-01-2014, 11:59 AM

Quote:

Originally Posted by 801nismo104

just use standard size if you're doing a basic build

thanks, and how about balancing?

801nismo104 · 04-01-2014, 12:00 PM

you also want to get a headgasket that is .5 bigger than your bore. so if your bore is 86.5mm get a headgasket that is 87mm

801nismo104 · 04-01-2014, 12:01 PM

its not required. just get your crankshaft polished if its in good shape

dallasb53 · 04-04-2014, 04:47 PM

blueprinting an engine is a misconception. when you get everything matched together such as the crank polished and the rods machined to match the crank, you are "blueprinting" the engine.

godsmack · 04-04-2014, 10:29 PM

Do you know what blueprinting an engine is? Doesn't sound like it. Balancing the crank is part of it. It's not necessary for a mild build. When you put the pistons in make sure they are in the right direction. And like said above get head gasket according to how much is taken off when decked. I wouldn't go with a bigger bore head gasket though. That just seams to be a good point for carbon to build up.

Also make sure to get the front cover decked with the block if you go with a metal head gasket. It isn't necessary but something that has potential to cause problems.

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dallasb53 · 04-04-2014, 11:39 PM

http://en.m.wikipedia.org/wiki/Engine_tuning

Hey godsmack scroll down the definitions and then blueprinting and tell me its not exactly what the fuck I said.

godsmack · 04-05-2014, 09:32 AM

That isn't anything like what you said. Blueprinting an engine is basically balancing the internals. Now polishing a crank and machining rods to match crank is not blueprinting. You machine the counterweights on the crank when balancing. I've never machined a rod when blueprinting.

I was kind of suprised that the Wikipedia article was actually decently informative and correct.

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04-01-2014, 11:51 AM	#1
s13_st Leaky Injector Join Date: Mar 2014 Location: socal Age: 26 Posts: 66 Trader Rating: (0) Feedback Score: 0 reviews	Engine build help. This is my first time building an engine. Everyone's gotta start somewhere so please don't say "if you don't know what you're doing then you shouldn't be building". Anyways, questions are: when i change pistons and rods, stock stroke and compression, do I have to do readjustments such as balancing the bottom end. And do I need a thicker head gasket with 256 Degree 11.50mm Lift in/ex cams, and if I do, what thickness?

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04-01-2014, 11:58 AM	#2
801nismo104 Zilvia Member Join Date: May 2010 Location: Everywhere Posts: 228 Trader Rating: (7) Feedback Score: 7 reviews	headgasket thickness depends on how much material has been removed from the deck of the block and head and what compression ratio you want.

04-01-2014, 11:59 AM	#3
801nismo104 Zilvia Member Join Date: May 2010 Location: Everywhere Posts: 228 Trader Rating: (7) Feedback Score: 7 reviews	just use standard size if you're doing a basic build

04-01-2014, 12:00 PM	#5
801nismo104 Zilvia Member Join Date: May 2010 Location: Everywhere Posts: 228 Trader Rating: (7) Feedback Score: 7 reviews	you also want to get a headgasket that is .5 bigger than your bore. so if your bore is 86.5mm get a headgasket that is 87mm

04-01-2014, 12:01 PM	#6
801nismo104 Zilvia Member Join Date: May 2010 Location: Everywhere Posts: 228 Trader Rating: (7) Feedback Score: 7 reviews	its not required. just get your crankshaft polished if its in good shape

04-04-2014, 04:47 PM	#7
dallasb53 Zilvia Member Join Date: Nov 2012 Location: Alabama Age: 30 Posts: 174 Trader Rating: (1) Feedback Score: 1 reviews	blueprinting an engine is a misconception. when you get everything matched together such as the crank polished and the rods machined to match the crank, you are "blueprinting" the engine.

04-04-2014, 10:29 PM	#8
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 36 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	Do you know what blueprinting an engine is? Doesn't sound like it. Balancing the crank is part of it. It's not necessary for a mild build. When you put the pistons in make sure they are in the right direction. And like said above get head gasket according to how much is taken off when decked. I wouldn't go with a bigger bore head gasket though. That just seams to be a good point for carbon to build up. Also make sure to get the front cover decked with the block if you go with a metal head gasket. It isn't necessary but something that has potential to cause problems. Sent from my HTC One using Tapatalk

04-04-2014, 11:39 PM	#9
dallasb53 Zilvia Member Join Date: Nov 2012 Location: Alabama Age: 30 Posts: 174 Trader Rating: (1) Feedback Score: 1 reviews	http://en.m.wikipedia.org/wiki/Engine_tuning Hey godsmack scroll down the definitions and then blueprinting and tell me its not exactly what the fuck I said.

04-05-2014, 09:32 AM	#10
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 36 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	That isn't anything like what you said. Blueprinting an engine is basically balancing the internals. Now polishing a crank and machining rods to match crank is not blueprinting. You machine the counterweights on the crank when balancing. I've never machined a rod when blueprinting. I was kind of suprised that the Wikipedia article was actually decently informative and correct. Sent from my HTC One using Tapatalk