View Full Version : buy a $500 torque plate or not?
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 (http://www.mazworx.com/index.php?l=product_detail&p=3086)
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.
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