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Old 05-19-2016, 09:05 AM   #1
SaltySeaRabbit
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Member#: 434433
Join Date: Nov 2015
Vehicle:
2005 Saab 9-2x Aero

Default DIY Blast Plates?

Anyone build any DIY Blast Plates for there 5 speed transmission? It seems pretty straight forward but I have a few questions for those who have done it...

Anyone know how long the fasteners that go through the case have to be?

Anyone know how far off the plate needs to sit off each of the mounting points? Do you think stacking washers to fill these gaps as needed would be sufficient or would I want to weld a spacer onto the plate?
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Old 06-16-2016, 02:51 PM   #2
Bansheeboy11
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Member#: 182415
Join Date: Jun 2008
Chapter/Region: Tri-State
Location: New York
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1999 RS
Aspen White

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Take the length of the OEM bolt, add the width of the plates/washers/nuts etc and find one that works with that length. As for spacers, id use a solid tube to space out those couple.
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Old 06-16-2016, 02:54 PM   #3
Titter
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Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default DIY Blast Plates?

its not only the plates that add rigidity. the bolts used in moores kits are about 10x stronger than oem.

you could always contact ARP and see if they can make you some if you know the exact specs.

Last edited by Titter; 06-18-2016 at 11:02 PM.
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Old 06-27-2016, 11:07 PM   #4
norexyet
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Grade 8 bolts would be fine. Like the other guy said, take the factory bolt, add the thickness of the plates, etc. Tubing with a close ID to the bolt is fine for spacers. Pretty simple piece.
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Old 06-28-2016, 07:36 AM   #5
rtv900
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2016 STI

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yeah a bushing (tubing that is close if you can't make a proper bushing) is way cleaner than stacking washers, although stacking washers will absolutely do the same job it will just look sloppy.
grade 8 bolts are more than strong enough, if you break them you have much bigger problems than a transmission, your spine and brain will be your priority at that point.
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Old 03-09-2018, 07:40 PM   #6
blackbeau_ty
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Join Date: Mar 2018
Default DIY Blast Plates

I'm looking to make these at work on my own and don't have a transmission that is out of a car in order to measure.

What specifications are there for the bolt pattern?
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