Jurgen-Jm-Imports Posted April 20, 2010 Share Posted April 20, 2010 anybody have any experience in nikasil alu bores.. ? what are the benifts. reason am asking is am not sure wether to sleeve my new vr38 alu engine and lose a few cooling effeciencies in the process or opt to have my bare block coated with nikasil cheers Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 20, 2010 Share Posted April 20, 2010 Plagiarised from some ol' course work material I read many years ago. Re-Plated Cylinder Bore Pros *Small advantage in heat transfer *Slightly better wear factor *Somewhat lower co-efficient of friction *Less weight Cons *Costs slightly more *Can’t be bored when damage occurs *More fragile than steel sleeves. *Can flake and peel Iron Sleeved Cylinder Bore Pros *Costs less *Boreable for future over sizes *Honeable to keep bore true and proper ring seal *Can be worked with common tools *Can be replaced when needed Cons *Slightly slower heat transfer Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted April 20, 2010 Share Posted April 20, 2010 didnt bmw recall all the nikasil lined engines and replace them with alusil because they were all suffering with bore damage? Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 20, 2010 Share Posted April 20, 2010 ^ Yup, although it only affected countries with high Sulphur content in their fuel. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 20, 2010 Author Share Posted April 20, 2010 yep i read about the bmw issue.. i have some many choices but just dont know which way to go:( Quote Link to comment Share on other sites More sharing options...
Nic Posted April 20, 2010 Share Posted April 20, 2010 JUN are using liners in their 4.0L VR38DETT short block assembly, a cool £16K a pop! http://www.junauto.co.jp/products/cylinderblock-part/short-block/index.html?en Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 20, 2010 Share Posted April 20, 2010 I'll have two...no make that three, I'm feeling flush Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 20, 2010 Share Posted April 20, 2010 I work on a lot of coated bore engines. It's a minefield and you need to match piston and ring material to the bore type or DISASTER!! There are several UK specialists who can advise, try here for a start, in fact doesn't a forum member work for Capricorn? http://www.capricorngroup.net/en/automotive-en/laufbuchsen.html Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 20, 2010 Author Share Posted April 20, 2010 I work on a lot of coated bore engines. It's a minefield and you need to match piston and ring material to the bore type or DISASTER!! There are several UK specialists who can advise, try here for a start, in fact doesn't a forum member work for Capricorn? http://www.capricorngroup.net/en/automotive-en/laufbuchsen.html company in america does it and have done an r35 gtr already.. they build race engines. i think i will send them my block and they hone match everything. cheers Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 20, 2010 Share Posted April 20, 2010 Personaly, I would try to keep any sort of machining/specialised work UK based, purely from a back up perspective. Outsourcing across the pond can turn into a logistical nightmare should the worse happen again. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 20, 2010 Author Share Posted April 20, 2010 Personaly, I would try to keep any sort of machining/specialised work UK based, purely from a back up perspective. Outsourcing across the pond can turn into a logistical nightmare should the worse happen again. tbh this guy has done one and owns a race tuning shop.. (and has built a vr38) the guy in question was the one who raced his and won some victory event.. goturnstop.com Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 20, 2010 Share Posted April 20, 2010 Your call mate. Don't forget we have some superb engine builders/specialist in this country. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 20, 2010 Author Share Posted April 20, 2010 Your call mate. Don't forget we have some superb engine builders/specialist in this country. we do but none have done the vr38:( Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 21, 2010 Share Posted April 21, 2010 I am up for a challenge I love spending customers money on interesting projects. Seriously though, do NOT underestimate the time, potential disasters and cost of taking something like this on Jurgen. Others have said it, why not put a stock engine back in and let other poor saps do the development to make these things handle more power? You know it makes sense Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 21, 2010 Share Posted April 21, 2010 we do but none have done the vr38:( Well there's an opportunity to innovate if ever I heard one. Speaking of development, has Will released anymore testing data on his NiSil motor? I notice he is on his 2nd/3rd version of it now. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 21, 2010 Author Share Posted April 21, 2010 Well there's an opportunity to innovate if ever I heard one. Speaking of development, has Will released anymore testing data on his NiSil motor? I notice he is on his 2nd/3rd version of it now. has he had 2 3 engines already failed ? or do you mean he has done 3 of them.. cwilson choice sounds good but will is going to sponsor me.. am not sure chris will want to do that. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 21, 2010 Share Posted April 21, 2010 I don't even sponsor myself Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 21, 2010 Share Posted April 21, 2010 has he had 2 3 engines already failed ? or do you mean he has done 3 of them.. Dunno bud, that's why I'm asking. I spotted the following over on NAGTROC, but can't find any data on how it's progressing i.e longevity tests. If you're going to be somebody's guinea pig, you might as well do it yourself in conjunction/sponsorship with a UK company and develop some proprietary products from it. I thought you had already rebuilt your motor and were breaking it in months ago? Have changed the setup a couple times. Now on version 3 of the motor. Problem is I have too many ideas. Need to stop development long enough to put together a package and offer it for sale. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted April 21, 2010 Author Share Posted April 21, 2010 Dunno bud, that's why I'm asking. I spotted the following over on NAGTROC, but can't find any data on how it's progressing i.e longevity tests. If you're going to be somebody's guinea pig, you might as well do it yourself in conjunction/sponsorship with a UK company and develop some proprietary products from it. i will look into it.... at this rate am going to order a JUN STROKER KIT Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 21, 2010 Share Posted April 21, 2010 Well if you're feeling that flush you might as well phone Cosworth for a chat Quote Link to comment Share on other sites More sharing options...
Nic Posted April 21, 2010 Share Posted April 21, 2010 Cosworth are making the JUN pistons, so they must have some experience of the engine already. Quote Link to comment Share on other sites More sharing options...
Miguel Posted April 21, 2010 Share Posted April 21, 2010 They already have experience with the VQ35 in N/A and Turbo guises, so I can't see the VR38 being a massive leap for them. Quote Link to comment Share on other sites More sharing options...
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