Lithium

As much as Precision aren't my favourite turbo manufacturers - at a glance there is a reasonable amount of dubious in there. Comparing their own turbo with something that doesn't come from Garrett for a start (since when did GT3076Rs come with T60-1 compressors!?!), the Precision 6262 etc no long run the same turbines as they did back then, the smaller hub area etc is a common billet wheel design - partly of the attraction for forming a compressor wheel using billet machining instead of casting is you end up with a stronger product, so you can use less structure without increasing burst risk. I totally prefer the EFR8374 over the PT6266 though, and don't know of any recent EFR failures where things have been installed and used properly. There was a bad area way back when but now the only issue I am aware of is the turbine wheels don't like overspeeding, but that's easy enough to avoid by simple matching the turbo correctly and not being an animal.

Yeah that's essentially what I think my mate is intending on doing, keeping some stock or traditional mechanical gauges and have this for some of the more specialist stuff and possibly warnings etc. At this stage playing with an Arduino Mega with a RS232 -> TTL converter circuit bridging between the Arduino and the Link, and I am using an LED screen which has a certain amount of processing power of it's own so I can give it a bit of code, too - so it will worry purely about updating the graphs to suit values I pass it via the Arduino, and it "speaks" TTL so I am passing the values of interest to it directly via TTL from the Arduino. The Arduino worries about talking with the Link and getting all the relevant data and any other data processing (mainly handling any odd situations, smoothing data etc) so again the LCD screen just shows stuff it's told to display. Idea is to set up a system which maintains a good frame rate and smooth transitions so it looks analog, I get sick of seeing digital dash setups which are sickening to watch due to slow frame rates and unprocessed data, so it'd be nice to have it look more like what you'd see in Forza

Sweet, cheers Look into the Racepak dash etc - there are a few CAN bus things out there which should work with the ViPEC/Link, though it depends on how much you want to spend.

Lol! we'll see how it goes It's not really something which is being done with the intent of selling so much as being a mixture between scrooges (not wanting to pay someone else to do something we can probably do as well or better that a lot of other options - same reason for doing DIY tuning etc ) and having new things to play with. It's not going to end up in a nice packed product so much as something you wire in and hack up to fit lol

Early days at the moment, we've just been playing around with the bits of technology we'll need to put together to make it work to make sure they'll cut the mustard- and generally working out what we'll need to display and how it's all going to tie together. Here's a small screen I'm using for prototyping things/testing - just uploaded a random clip I happened to have in my phone:

Check out the Racepak Digital Race Dash, I know a few people using those - they plug in via CAN Bus. I am helping a mate build a digital dash for his race car which uses a G4 Link (uses exactly the same comms method as ViPEC) at the moment as well, at this stage it seems like it'd be MUCH cheaper just to make something yourself and it could arguably look nicer as you can customise it for exactly what you want, though we'll see how that plays out in practice. We'll probably just use the serial datastream functionality of the Link/ViPEC as CBF working out CAN atm though will probably have to nut that out at some point.

Yeah I would consider either to be most suited to the lunatics who would otherwise be putting a big single on their car but want it to be low key, under the bonnet at least haha Sent from my GT-I9505 using Tapatalk

Its more the comp housings I am wondering about - would love to know what the T618Zs could flow

I wouldn't imagine it would be ridiculous, just get the Kando housing (or something that will bolt onto the Mitsi plate) and modify it to suit the profile. In my make believe world where I have more engineering skills I like the idea of designing a custom RB26 bolton housing that has a diffuser area etc which better suits the 68HTA wheel, etc. I am sure that a turbo with matching (where it counts) outlines to the stock RB26 housings could have better flowing internal geometry, to allow for the 40-50lb/min flow per turbo you need for stock mount madness.

^ if you even have to ask that, what are you doing on a Skyline forum?

For some reason I thought I responded to this - of course they can I had even been pondering trying to buy some bits and making some hybrid things to experiment with though I'm not sure if I am THAT motivated. http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=PROD&Store_Code=FP&Product_Code=68HTASale&Category_Code=SP

That'll probably be partly just the boost curve of the 18G going up higher in the midrange as much as anything, though the big a/r you have now probably also plays into it a bit. Would have been interesting to have seen how the 16G6 would have gone, we're making similar power to you with one but it's also in the TD06 sized housing - have suspected for a long time (as Stao referred to with his turbo too) the T28 bolton housing and associated bits are probably a bit of a restriction at this level.

^ Nice, GTScoTT may sex wee! Would be a little meaningful with rpm though, silly rolling road dynos I'm curious - I notice the 18G and your current turbo made almost exactly the power, and you mentioned previously you had full boost by 4000rpm with the 18G.... how does the .86 compare with the 18G in terms of response?

I'm missing something - I think his is on E85 and it maxed out making just over 260rwkw? Or you mean 300kw @ hubs?

What did the ATR28G2 make?

And those are on an SR20DET? What was it like with the .64? And what injectors are you running?

Having said that, check out the clip I posted in the Borg Warner EFR thread - 900hp @ crank RB30 drift car, pretty fun stuff RB26 with 1000hp however, not too exciting but not necessarily as bad as some may think these days.

Wow, those are fuzzy - can't make out rpm or anything, what is the spool like? ie, where do they hit 1bar?

Yeah, I think that is the best demonstration I have seen of how responsive those turbos are in practice for the power... Pretty awesome as that is near 100kw off its full power in that clip! Sent from my GT-I9505 using Tapatalk

This car had it's first drift outing with the EFR this weekend, running on it's lowest boost setting - here's some in car from the event: https://www.facebook.com/photo.php?v=667298030008133&stream_ref=10

I have only ever heard of maybe two RBs being tuned on engine dynos, one RB25 making ~1400hp and one RB26 making ~1700hp - probably not too helpful for this topic, most people aiming for "only" 600ish are content with a rolling road or hub dyno

As in it will be fantastic when it finally responds

Well it seems it is definitely possible, hard to know what to read from it when a couple go wrong... Entirely possible there was something else at play there but with so little info it's a bit hard to make a sweeping judgement. I do know someone who recently had a poor result with a completely unrelated brand of turbo where someone shoved a big wheel into a non native turbine housing and that bombed quite badly so it seems plausible I guess. I wish I could remember where I am sure I heard or saw someone with a similar combo which made good power, as it was discussed when we were plotting development for my mates S14. The 16G was selected because it was going to suit better, we had no indication or assumption a T25 TD06 would underperform, well aside from the fact that with stock cams it wouldn't make too much over 200kw on petrol. . Hence not being considered a great match for his needs as he was unlikely to upgrade anything else for sometime to come Sent from my GT-I9505 using Tapatalk

Never heard of that issue but don't really know anyone who has tried a T25 TD06 kando off the top of my head... Though I was sure I had heard of them. A really quick Google brought this totally reasonable result up and no evidence of any dramas, can you point us at any reads on the drama you are talking about? http://www.tamparacing.com/forums/nissan-infiniti-tech/814254-kinugawa-20g-turbo-review.html Sent from my GT-I9505 using Tapatalk

You know that wheel is well different to the 68HTA? On that note however, the billet 16G or 18G themselves are pretty potent. Will ponder on how worthwhile a change from a GT-RS they would be, however.