buy a $500 torque plate or not? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

frankenfresh · 05-31-2010, 12:16 AM

I am building my sr20det with 86.5mm bore and 9:1 compression cp pistons. i am at the stage where the machine shop is about to start work and am wondering if i should be buying a torque plate? my understanding of this plate is that it is to compress the block as if the head were bolted on which causes the aluminum to squish a little and the cylinders to swell in a little. mazworx uses these while boring the cylinders and you are supposed to use one while grinding the piston rings.

do i NEED this tool? or are people building motors without it?

SR20 90mm Torque Plate

Sileighty_85 · 05-31-2010, 12:18 AM

Ask your machine shop.

When I had my engine machined I just dropped it off with them and they took care of it, been 4 years since without a problem

hassanbakar123 · 05-31-2010, 12:20 AM

seems like you could even make something cheaper then that how much does a bare sr head cost and cut it up...

GSXRJJordan · 05-31-2010, 12:23 AM

If you want to do it right, using a torque plate is a good idea. Stops any 'ovaling' of the block while they're boring. I wouldn't suggest buying one, I'd suggest sending your block to someone that deals with SR's frequently (like Mazworx, etc) who has one. Much cheaper.

codyace · 05-31-2010, 12:28 AM

With such a small 'overbore' you'll probably be fine on a stret based car. As Jordan says above, you'd be best off either shipping to an SR specialist, or renting one from one that does have one.

frankenfresh · 05-31-2010, 12:35 AM

ya the car will see heavy abuse and 500 hp.

05-31-2010, 12:16 AM	#1
frankenfresh Leaky Injector Join Date: Mar 2009 Location: canada Posts: 63 Trader Rating: (1) Feedback Score: 1 reviews	buy a $500 torque plate or not? I am building my sr20det with 86.5mm bore and 9:1 compression cp pistons. i am at the stage where the machine shop is about to start work and am wondering if i should be buying a torque plate? my understanding of this plate is that it is to compress the block as if the head were bolted on which causes the aluminum to squish a little and the cylinders to swell in a little. mazworx uses these while boring the cylinders and you are supposed to use one while grinding the piston rings. do i NEED this tool? or are people building motors without it? SR20 90mm Torque Plate

05-31-2010, 12:18 AM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Ask your machine shop. When I had my engine machined I just dropped it off with them and they took care of it, been 4 years since without a problem __________________ 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

05-31-2010, 12:20 AM	#3
hassanbakar123 Zilvia Junkie Join Date: Apr 2008 Location: san bernardino Posts: 375 Trader Rating: (1) Feedback Score: 1 reviews	seems like you could even make something cheaper then that how much does a bare sr head cost and cut it up... __________________ https://www.linkedin.com/in/hassanbakar

05-31-2010, 12:23 AM	#4
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	If you want to do it right, using a torque plate is a good idea. Stops any 'ovaling' of the block while they're boring. I wouldn't suggest buying one, I'd suggest sending your block to someone that deals with SR's frequently (like Mazworx, etc) who has one. Much cheaper. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

05-31-2010, 12:28 AM	#5
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	With such a small 'overbore' you'll probably be fine on a stret based car. As Jordan says above, you'd be best off either shipping to an SR specialist, or renting one from one that does have one. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

05-31-2010, 12:35 AM	#6
frankenfresh Leaky Injector Join Date: Mar 2009 Location: canada Posts: 63 Trader Rating: (1) Feedback Score: 1 reviews	ya the car will see heavy abuse and 500 hp.