TT350 Posted January 31, 2017 Share Posted January 31, 2017 You shouldn't need uprated rods for NA. Rods are good for around 330ft/lbs.the vq crank is forged so no need to upgrade You think its just the 95RON then? Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 Absolutely! It's well known to cause det. 95 has destroyed plenty of VQ'S I just presumed all z owners would know this it's well documented Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 (edited) 95 Ron and bearing regardless it is NA if my car it would be already replaced by 88k miles Sent from my SM-G850F using Tapatalk Edited January 31, 2017 by Snjur Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 95 Ron and bearing regardless it is NA if my car it would be already replaced by 88k miles Sent from my SM-G850F using Tapatalk Sorry what? Quote Link to comment Share on other sites More sharing options...
nowhereboy Posted January 31, 2017 Share Posted January 31, 2017 Oh dear!! Not sure how you didn't know about this OP, bit of an expensive lesson to learn Quote Link to comment Share on other sites More sharing options...
RobPhoboS Posted January 31, 2017 Share Posted January 31, 2017 my car spends most its life being bashed on the limiter being a drift car... Worth looking into oil cooler, baffled sump I'm quite surprised if you frequently drift (or anyone tracking a lot) the car that you didn't already have those two installed. Spilt milk and all of that. Like wise for fuel, unless you meant 'normal' as in 98 for Z's. Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 95 Ron and bearing regardless it is NA if my car it would be already replaced by 88k miles Sent from my SM-G850F using Tapatalk Sorry what? On 88k miles if my engine a new set of bearings would be there Sent from my SM-G850F using Tapatalk Quote Link to comment Share on other sites More sharing options...
TT350 Posted January 31, 2017 Share Posted January 31, 2017 Expensive lesson for me. Doh. Idiot. It will have been mapped on Vpower too when I had it turbo'd. *hangs head in shame* Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 Expensive lesson for me. Doh. Idiot. It will have been mapped on Vpower too when I had it turbo'd. *hangs head in shame* Have you been using normal fuel aswell lol? Big mistake. Maybe not too late to save it tho. And if you have low comp pistons it might be enough to have not caused any issues Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 (edited) I've heard and read stories on a lot of stock vq35de failing on track bearing related. So it is not common thing for vq to fail. As buddy is saying vq ECU use double tables for correction so if too much of knocking is appearing it is using low ignition timing tables.Vq35de for a v6 3.5 it uses really low amount of oil, which relates to cooling. Clearances on crank are not enough for the size of journals. Combine all this together you get a bearing failure and knock knock who's there Sent from my SM-G850F using Tapatalk Edited January 31, 2017 by Snjur Quote Link to comment Share on other sites More sharing options...
nowhereboy Posted January 31, 2017 Share Posted January 31, 2017 Hasn't TT's engine already went pop? Quote Link to comment Share on other sites More sharing options...
dougie350 Posted January 31, 2017 Author Share Posted January 31, 2017 Well.... this is interesting! I think I may have f****d up then! I actually thought they were ok to run on 95 fuel! But yes you are all right, that must have played a massive contributing part in it! 1 Quote Link to comment Share on other sites More sharing options...
Ekona Posted January 31, 2017 Share Posted January 31, 2017 I would say that it's the single biggest contributory factor, yes. Not trying to poke a man when he's down, but why did you think that? Do you not have a 98RON ONLY sticker under your fuel cap? Quote Link to comment Share on other sites More sharing options...
dougie350 Posted January 31, 2017 Author Share Posted January 31, 2017 Ok, well at least we're maybe getting somewhere with diagnosis of the problem! No there isn't any stickers saying, I knew that it's better to put 98 in, but I didn't think it would be deadly putting in 95. I guess I know for next time now Quote Link to comment Share on other sites More sharing options...
Ekona Posted January 31, 2017 Share Posted January 31, 2017 I guess the previous owner must've removed it. That's pretty harsh then, you have my sympathies. Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 Well.... this is interesting! I think I may have f****d up then! I actually thought they were ok to run on 95 fuel! But yes you are all right, that must have played a massive contributing part in it! Ah that sucks man I think I broke mine by using too thick an oil :/ we will learn from our mistakes lol. Are you gona go for the 1uz now? Quote Link to comment Share on other sites More sharing options...
dougie350 Posted January 31, 2017 Author Share Posted January 31, 2017 Yeh bit of a bummer dude! There we are, onwards and upwards! I'm not sure really dude, I kind of want to get back out asap and if I go down that route it'll be a lot longer than just putting another vq in! Undecided yet really Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 Yeah understandable man. I wasn't missing it too much but over the last couple of weeks I've been choking to get back out. I'm probably going to be another 2 months before I've got mine built and run in, staying positive tho. At least you know that if you buy another vq you could have the car back out in a day, but it's the cost of another vq that could end up knocking. It's a hard choice man 1 Quote Link to comment Share on other sites More sharing options...
evilscorp Posted January 31, 2017 Share Posted January 31, 2017 Nissan bearings are fine, in fact they are better to use compared with off the shelf aftermarket items as you can get them in much more varied sizes rather than std or oversized as some manufacturers sell. White metal is destroyed by other factors like impurities and heat. I have acl but would be tempted to switch to oem. As for tolerance if you do some searching there's lots of conflictiting opinions on what size gaps to use for different power levels. I would say own tolerances are fine if the correct oil is used, think about the tiny squirters if you use too thick an oil they won't shift much under the pistons until it's properly warmed up. 1 Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted January 31, 2017 Share Posted January 31, 2017 There's an engine for sale in the zs breaking section on here I've just noticed. P15ULT I think his name is Quote Link to comment Share on other sites More sharing options...
TT350 Posted January 31, 2017 Share Posted January 31, 2017 Hasn't TT's engine already went pop? Yep. Snap, crackle and pop. Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 (edited) When all is fine with vq just Google vq35de engine fail... Vq has been around now 2 decades. All the weak spots have been figured out. We have 3 boosted Z-ed here built on same principle 550 650 and 900 bhp. Never issues with the bearings or rod's or knock knock. Car driven daily, tracked and street raced Sent from my SM-G850F using Tapatalk Edited January 31, 2017 by Snjur Quote Link to comment Share on other sites More sharing options...
TT350 Posted January 31, 2017 Share Posted January 31, 2017 When all is fine with vq just Google vq35de engine fail... Vq has been around now 2 decades. All the weak spots have been figured out. We have 3 boosted Z-ed here built on same principle 550 650 and 900 bhp. Never issues with the bearings or rod's or knock knock. Car driven daily, tracked and street raced Sent from my SM-G850F using Tapatalk 900hp on stock rods?! Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 (edited) When all is fine with vq just Google vq35de engine fail... Vq has been around now 2 decades. All the weak spots have been figured out. We have 3 boosted Z-ed here built on same principle 550 650 and 900 bhp. Never issues with the bearings or rod's or knock knock. Car driven daily, tracked and street raced Sent from my SM-G850F using Tapatalk 900hp on stock rods?! Of course no :o Engine has been rebuilded. Started with Procharger than moved to Precision turbo 6266, now on size bigger new Precision and high compression pistons aiming for 4 digits HP. Sent from my SM-G850F using Tapatalk Edited January 31, 2017 by Snjur Quote Link to comment Share on other sites More sharing options...
Snjur Posted January 31, 2017 Share Posted January 31, 2017 When all is fine with vq just Google vq35de engine fail... Vq has been around now 2 decades. All the weak spots have been figured out. We have 3 boosted Z-ed here built on same principle 550 650 and 900 bhp. Never issues with the bearings or rod's or knock knock. Car driven daily, tracked and street raced Sent from my SM-G850F using Tapatalk 900hp on stock rods?! Of course no :o Engine has been rebuilded. Started with Procharger than moved to Precious turbo 6266, now on size bigger new Precision and high compression pistons aiming for 4 digits HP. Sent from my SM-G850F using Tapatalk Quote Link to comment Share on other sites More sharing options...
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