Rabbs 0 Report post Posted January 18, 2019 Hi I go on tour in europe every year and last year was the first with my supercharger, towards the end of the tour one of my coils (passenger side) started misfiring but once everything had cooled down it was fine and I reset the error code etc, this was the last day in the heat and it was very hot. It's been fine since I've been back home. I assumed this was down to the engine bay temperature rising, I've seen a few posts on coils failing due to this. https://www.pointmeby.com/2017/09/10/86-brz-frs-p0351-cel-p0353-coil-pack-how-fix/ I was thinking of upgrading the coils which is around £800 but a friend also suggested a vented bonnet https://www.demon-tweeks.com/seibon-carbon-fibre-bonnet-ts-style-seihd1213scnfrs-ts/?istCompanyId=a2904180-3a7d-4e56-b876-cf81c9512180&istItemId=-xpitqlxmxw&istBid=t&gclid=Cj0KCQiAj4biBRC-ARIsAA4WaFgI1WlBEaP-7yoNrvIcfRf0u9eFNuUjKn2CLFhMGoO277owtNzCGtoaAqgKEALw_wcB&gclsrc=aw.ds Not only could this solve the problem but it would also look nice. Does anyone have any experience on coils or if the bonnet vents are effective at lowering temperatures enough to stop this happening again? Thanks Andy Share this post Link to post Share on other sites
surrey86 352 Report post Posted January 18, 2019 I went through 4 ignition coils until I put gold heat reflective tape over them. Haven't had a failure since... (Probably get one next trackdays now) Share this post Link to post Share on other sites
Varelco 211 Report post Posted January 18, 2019 It could help, you could else fit heatsinks onto the back of the coilpacks to help dissipate heat? Share this post Link to post Share on other sites
surrey86 352 Report post Posted January 18, 2019 The heat is not coming from the coil pack, they are being warmed from the exhaust. Last thing they need is more surface area with a heat sink. Share this post Link to post Share on other sites
Varelco 211 Report post Posted January 18, 2019 Ah yeah... good point! (Ignore that Rabbs) Share this post Link to post Share on other sites
rob275 1817 Report post Posted January 18, 2019 8 hours ago, maurice said: I went through 4 ignition coils until I put gold heat reflective tape over them. Haven't had a failure since... (Probably get one next trackdays now) I had this done when i replaced mine and didn't have an issue after that. Reflective tape is the easiest thing to do and its cheap. Share this post Link to post Share on other sites
MartinT 514 Report post Posted January 18, 2019 I had a Sprintex supercharger on my previous car, a Honda CR-Z. They get very, very hot and need a large volume of air moving over them. I suffered from overheating (not coils in this case, just poor running) until I replaced the bonnet with a vented Seibon CF one. It solved the problem completely and I had no further overheating even in summer. So the answer to your question is yes, vented bonnets are effective at lowering the temperature in the engine bay. Share this post Link to post Share on other sites
Church 209 Report post Posted January 19, 2019 Vents do work also they lover front aerodynamic lift. Depending on area/placement it's 5-11 degrees cooler temps vs oem hood on ours. Share this post Link to post Share on other sites
