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The mkiv Supra Owners Club

1 Bar r/ring


Supradan

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Will i need colder grade plugs if i de cat and run with a 1 bar restrictor ring.I am not going to remove the fuel cut as i would like to keep the original safety of it.Fuel pump will be ok as car has only done 49k miles ,is there anything else i need to consider

cheers all

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My car ran "ok" at 1.2bar with the same plugs as it had when it was stock until I changed them so I would imagine you'd be ok. From the FAQ however:

 

Stock TT

NGK - BCPR6EP-11 - gap to 1.1mm PLATINUM

NGK - BKR6E (2756) - gap 1.1mm

NGK Iridium - BKR6EIX-11 (3764) leave gap alone

Denso Platinum - PK20R11 - gap 1.1mm

Denso Iridium - IK20 - leave gap alone

 

TT @ upto 1bar

NGK - BCPR7ES (3330) - gap 0.9mm

NGK - BKR7E (6097) - gap 0.9mm

NGK - Iridium - BKR6EIX or BKR7EIX - leave gap alone

Denso Platinum - PK20R11 - gap 0.8mm

Denso Iridium - IK22 - leave gap alone

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