M3flatout Posted March 16, 2017 Share Posted March 16, 2017 Tomei 264/264 8,5 poncams Hi i just bought tomei poncams with 264/264 8,5 lift to My rb25det spec 1 nvcs with lash type/hydraulic lifters. I have installed tomei type a springs too. But The problem is The car missfire and everything. When i checked comp on cylinders some have VERY Liw like 4-5 bar and some 11 bar. Then when i installed The oem intake camshaft i had normal comp in all cylinders with 264 exhaust CAM left in engine. Camwhells are oem. This CAMs are dropins says tomei. Anyone that knows or have seen problem like this? Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/ Share on other sites More sharing options...
KiwiRS4T Posted March 16, 2017 Share Posted March 16, 2017 Are there different cams for VCT and non VCT engines (i.e do you have the right ones)? Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7817846 Share on other sites More sharing options...
M3flatout Posted March 16, 2017 Author Share Posted March 16, 2017 (edited) 24 minutes ago, KiwiRS4T said: Are there different cams for VCT and non VCT engines (i.e do you have the right ones)? Yes and i have vct on My engine and those CAMs are compatible. According to The seller is nvcs ANd vct The same? Edited March 16, 2017 by M3flatout Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7817854 Share on other sites More sharing options...
KiwiRS4T Posted March 17, 2017 Share Posted March 17, 2017 What is nvcs? Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7817947 Share on other sites More sharing options...
89CAL Posted March 17, 2017 Share Posted March 17, 2017 Nissan Variable Cam System I believe. No idea why Tomei call it this though Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7817959 Share on other sites More sharing options...
tridentt150v Posted March 18, 2017 Share Posted March 18, 2017 You didn't adjust the timing at all did you? They should both be zero for a 25. Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818182 Share on other sites More sharing options...
M3flatout Posted March 19, 2017 Author Share Posted March 19, 2017 On 2017-03-18 at 1:47 AM, tridentt150v said: You didn't adjust the timing at all did you? They should both be zero for a 25. What do you mean? Cam betalt timing or degreeing them? Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818573 Share on other sites More sharing options...
tridentt150v Posted March 19, 2017 Share Posted March 19, 2017 Adjustable cam pulleys, if yr using STD pulleys then u can't adjust. If yr using eg Tomei's with a live centre then they should be zero. Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818580 Share on other sites More sharing options...
M3flatout Posted March 19, 2017 Author Share Posted March 19, 2017 10 hours ago, tridentt150v said: Adjustable cam pulleys, if yr using STD pulleys then u can't adjust. If yr using eg Romeo's with a live centre then they should be zero. I dont have adjustable camwheels. Allt stock wheels. Well The vct wheel is adjustable tho. But i tried to back IT and foreard IT with VERY Lottie changes. But not enough Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818666 Share on other sites More sharing options...
tridentt150v Posted March 20, 2017 Share Posted March 20, 2017 Sorry Tomei's....dumb auto correct on phone changed it to Romeo's....lmao Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818793 Share on other sites More sharing options...
KiwiRS4T Posted March 20, 2017 Share Posted March 20, 2017 If its fine with the OEM inlet cam and not with the Tomei look very hard at the Tomei for damage - preferably with old and new side by side. Is the CAS drive piece the same on both (and undamaged)? See if uou can find numbers on the cam to confirm that they are a pair. can you install the cam 180 degrees out? If the Tomei Inlet cam is putting your compressions miles out something is very wrong. Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818802 Share on other sites More sharing options...
M3flatout Posted March 20, 2017 Author Share Posted March 20, 2017 8 hours ago, KiwiRS4T said: If its fine with the OEM inlet cam and not with the Tomei look very hard at the Tomei for damage - preferably with old and new side by side. Is the CAS drive piece the same on both (and undamaged)? See if uou can find numbers on the cam to confirm that they are a pair. can you install the cam 180 degrees out? If the Tomei Inlet cam is putting your compressions miles out something is very wrong. The CAms knocks looks like The same. The cas drive is on The exhaust side. I have tried to fully retard and advance The oem vct cam gear with VERY little changes on compretion. Numbers on CAMs are a2685x on The exhaust and b2685 on The intake side. Link to comment https://www.sau.com.au/forums/topic/469626-tomei-264264-85-poncams/#findComment-7818891 Share on other sites More sharing options...
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