Krister Posted February 7, 2016 Share Posted February 7, 2016 Hi, I have the following 2JZ items for sale: Brand new Supertech SPRK-TS1015 dual valve spring kit Box has been opened but everything is unused. http://realstreetperformance.com/Shop-by-Engine/Valvesprings-Retainers_30/Supertech-Supra-2JZGTE-91lb-Dual-Valvesprings-Retainers-Kit.html Includes Ti retainers etc. Whifbitz price: £580. I'd like to get £430 for these. Supertech +1mm valves Intake valves are used Exhaust valves are brand new. I had an issue because of most likely bad injector timing and I lost intake valve clearance on the intake side and had slight damaged the intake valves valve seat contact surface. The intake valves have been ground and re manufactured and my head builder said it's perfectly fine to use them, but I had already bought a new set and put that in my head instead. Intake valves have around 2000 miles on them. http://www.garagewhifbitz.co.uk/toyota/supra/engine-components/cylinder-head-components/supertech-3423.html Whifbitz price: £408 I'd like to get £250 for these £650 for both items above or give me an offer. Link to comment Share on other sites More sharing options...
Giiioo Posted February 7, 2016 Share Posted February 7, 2016 +1 damaged supertech intake valves, put back stock ones with zero issue, Link to comment Share on other sites More sharing options...
Krister Posted February 7, 2016 Author Share Posted February 7, 2016 What issue did you have? What setup, ecu etc..? Link to comment Share on other sites More sharing options...
Giiioo Posted February 7, 2016 Share Posted February 7, 2016 Built 3.0, gsc single springs s1 cams supertech valves, id 1000 injectors aem v2 ecu, intake valves was going up and stay open with 0 clearance, we did clearance twice but did not last 1000km, take out head again and all of the intake valves was damaged, i think material is to soft, all exhaust valves was perfect Link to comment Share on other sites More sharing options...
Krister Posted February 7, 2016 Author Share Posted February 7, 2016 I had the same issue, looks like we both had the AEM V2. I think it's an injector spray time issue along with the fact that all aftermarket valves are stainless and stock valves are martensitic alloy and can be hardened harder. An engine bulder / tuner herer had this same issue on two different car, but he changed the spray time so that there is more cooling to the valves and he didnt have an issue since. Link to comment Share on other sites More sharing options...
Giiioo Posted February 7, 2016 Share Posted February 7, 2016 Yes but there was 0 issue on stock valves before i built my engine i was using same setup, now i put back stock intake valves and clearance did not change at all, you can damage exhaust valves with high egt Link to comment Share on other sites More sharing options...
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