sneakey pete

What's stage 2?

If you don't ever plan on going with ethanol just throw in an walbro 460 and that should be more than enough. people manage to make 400kw with one and stock lines on ethanol, so if you are using 30% less fuel 500kw should be possible That being said.... Still shouldn't have fuel starvation at half a tank, so it may pay to check your pump setup and that something else isn't dropping or constricting it when you're throwing the walbro in it

not 500 bucks worth of cool however. I was thinking about carbon rooves not long ago. Wonder how much of a pain it would be to bond with the rest of the car, and in terms of perhaps doing it as a sneakey road car thing also (dreaming about the lottery here...)

Thanks man. Progress has been ticking away. Visited the builder on Monday, the stroker kit and block were all laid out and the head ready to assemble so progress is being made. I forgot to take my camera but the dam crank pistons and rods looked sexy. Hell of a crown on the pistons to reach the 9.5:1 ratio also. With luck I may even have it this week. Maybe... Since I don't have any other progress, will just post up some various videos from the car Drags: note on 3rd to 4th you can hear it drop out of the power band. such shit turbos Messing around on the skidpan: SAU Happylaps out at QR: warning, I probably start talking shit with Rick at the end

Nearly tax (bill) time!

That Z that made 500kw on a hub dyno also made it to the strip last month I believe, did anyone see any numbers from those runs?

There's a few take home messages from those numbers I think. First is the 7670 falling over by 8000rpm's obviously, but the gap in the theoretical rpm's for full boost between the pair is much larger than I'd have expected, and the power difference between the pair given that boost is much smaller than i'd have expected. The E70 numbers would be very interesting to see. Obviously the 7670 is going to fall flat on its face even worse but it would be interesting to see if the difference between boost and power comes down a bit due to the 7670 not getting the same efficiency gains, or not. That being said, 99% 8374 at this point given all of that.

Interesting. If its literally just an engine upgrade over the GTS, you'd be mad to not just get a GTS, pulley injectors and a tune surely.. In terms of taking on the europeans, the current GTS would surely have to rate higher in the fun factor (but not the luxury stakes) than the likes of the M5 or the equivalent Merc or Jag already, surely.

1 and 2, Yeah you are right, I had come to a similar conclusion, low mount doesn't seem like an option realistically, doubt you'd get a 8374 to fit down there, and wouldn't want to use external gates on it, but would probably want them for a 7670 due to the size of the turbo compared to the engine, so that wouldn't work. As for 3... Depends on how much difference there would be between the two The more and more I look the more and more i'm moved towards the 8374 (IWG). Those evo guys were all upgrading before they got their turbos though, chasing power.

Wouldn't say it was pressure, they had a 13 second pitstop, so an extra 10 seconds there, and Dan came out 1 second behind. In other words, they had a lead of 8 seconds or so, so Dan must have really, really been tearing ass on the lap after Hamilton went in 8 second lead isn't that much pressure

I understand that the 8374 does come on early, yes, but how much earlier would the 7670 be is the crux of the issue, in effect. I'd happily trade 50-80kw out of the top end for say*, 500rpm earlier boost and even better transient response. I'm not going to miss those 50kw on the street. I may on the track but i'd only be there for fun so I guess i'd just have to steer better to make up for it I'm going to try hunker down tonight and get my head around the BW turbo selection system. *yes I understand its probably a bigger difference than that if I were to properly lean on the 8374, but honestly I probably wouldn't lean on it to get that extra kw's up top.

Yeah i've been meaning to sit down and learn how to use their matching program but i've had a cold the last few days and its just seemed to hard If you don't mind running the numbers and giving me a rundown that would be neat. Build is pretty much 2.8L stroker, so 2740cc, 9.5:1 ish compression ratio (very interesting pistons, got to have a gaze at them thismorning), running 260 degree 11mm lift cams. Fuel will be E70. What else is needed for it? Power goal wise, 400kw is enough, as much response as possible is the more important factor for the type of driving I do, on the street and on country roads.

Yet. Didn't blow up Yet...

Last few posts i've been asking which EFR I should get... Move on from bashing on twins and help me decide if I want a 7670 or 8374. Main thing is I want the car to be fun to drive in the twisties

Jesus redbull..

Looks pretty fun. Got any logs of boost vs rpm vs tps vs time for that or just general spirited driving Patrick? i'm working on it... Tis an interesting read. Started at 101 and upto about 140 now I don't particularly feel the need for anything over 400kw's, no. but yes, there's some pretty good results with the 8374, its just a question of how much response is sacrificed, and additionally, there's the benfit that I could probably go .92 IWG for the 8374 and save money/simplify things a lot. I came across a comparison between the 7670 EWG and 8374 IWG on a pair of evo's in that thread which did show some pretty significant differences, but that was different engines/dynos etc, and they're smaller than my 2.8. More research is required Yeah, there was a nice log of someone over there doing a gear change showing boost recovered in about 3/4 of a second after 100% TPS was re applied (and about 1/2 second for 80% of boost). Pretty impressive. The sooner I can get stuff ordered the better but at the same time i'm not ordering until i'm 100% sure that I've picked the right setup.

Mine are up for sale...

Up for sale I have a factory turbo upgrade kit. It consits of GTX2860 turbos with -5 rear housings and R33 turbo front housings machined to suit so they can fit into the standard location. To go with this a set of 3" HPI dumps and a racepace 3" into 4" front pipe to allow all the exhaust to exit as easily as possible. I also have a factory nissan turbo gasket replacement pack with all turbo gaskets. The rear housings are ceramic coated as are the dumps. All is in as new condition, the turbo cores are brand new, the front pipes are fresh and untouched, ready for a 4" flange of your choice to be welded on. Additionally, I have the origoinal Gtx turbo front covers complete with almost finished high and low pressure intake piping. These have been designed with plasmaman wiggins style clamps on the front intake to avoid heat damaging a coupling. This means the turbos could be run with the gtx front covers in the factory gtr location if desired. This package is effectivly a set of -5 turbos' with a higher flowing billet compressor wheel. They have a flow potential much greater than a normal set of -5's and with a lighter front wheel. Combined with the massive dumps and front pipes I would say that this would be the ultimate stock position lowmount setup. Additionally, the equal length front pipes do sound like sex, an amazing sound. I'm asking for 5K for the whole lot. Turbos, dumps and front pipes along with the gasket kit. Initially I won't separate the items. If you have any questions or would like any more pictures of anything in particular, please ask. Cheers.

And on that topic, It seems like the race is between: 7670 IWG .92, which would probably get close to overspeeding but be even more stupidly responsive 7670 EWG 1.02, which should net more power but probably still get close to overspeeding, and be slightly less respnsive? 8374 IWG .92, which would be in a good efficiency range, but be laggier than the smaller option but maybe close to the 7670 EWG due to the smaller A/R?

Is that full weight or with stuff stripped out, and are there side impact bars, being an early model perhaps not? I thought it would have been in the 1500's range for sure...

The power curve goes form very little to very much in a short space of time. That is the definition of on off. Note i didn't say it was bad, also note I also commented how f**king amazing it is having 350+kw for an entire 3500rpm band a few posts later. No need to rant it makes you look silly; the facts are out there and are speaking for themselves, the real issue is the nitty gritty details of what particular size/setup I want to grab

Very on off... but there's 3500rpm of 350kw+ on there... Ugh, decisions.

The BW EFR turbos have a speed sensor that you can install on them to measure the rpm of the turbo. They have upper limits of course. There's a pretty fixed relationship between boost, speed and airflow (from memory, don't scold me if i'm wrong!) so it helps with safety and getting a good handle on exactly whats going on in your setup

The exact same one that sits on the back end of -5's

I'm not sure what you're referring to there re a rear housing for the gtx range? The rear wheel on the gtx turbos is the same as the GT turbos, and the rear housings also bolt straight up?