Lithium

Hmmm another test where someone uses Precision T4 open turbos on a T4 open manifold then puts a competitor T4 divided turbo on the same manifold and it fails to perform as well as the Precisions, or as well as it normally would - what are odds?? I like to think that it is not deliberate, but either way that test doesn't really show anything useful in regards to the FP turbo. I'd hope there aren't too many people who'd put a twin scroll turbo on an open manifold hoping for it to perform as it should!

Typically more of a drag turbo on EVOs, funnily enough - though don't let the scale caused by the huge power numbers fool you, I wouldn't say boost is "starting" at 5500rpm when both turbos are making >300awkw when they intersect the 5600rpm line. This is just a 2litre engine with porting and head work for HIGH rpm and it is making 180awkw on both turbos by around 5000rpm on a fairly low reading dyno. That isn't really messing around that badly all things considered, on a 3litre engine these things would be totally streetable.

Their GT3786R would be a lot more responsive than the 3794R I'd say, probably still quite good power potential and probably roughly equivalent to the PT6266 CEA - so a different kind of beast. The 3794R is a large turbo, always was going to be quite laggy.

Yeah I'm not too sold on the not touching timing thing for the comparisons thing - part of the point of changing parts is changing what the engine can do, tuning a car is what gets that potential out... there may (or of course may not - we can't know) be potential for the 3794R to make more power & torque as the timing maps would have been set using the 6766 seeing as it was the first turbo in the test. In regards to the not much gain - not far under 10whp per psi when you are dealing with 40+psi is a pretty respectable gain on a 2litre! One way or another, to me it appears that if we had compressor maps to refer to - the 3794 compressor map would look better suited to higher flowing lower boost engines while the PT6766 is more high boost biased - which is a suspicion I've had for a while, as with the fact that the two turbos would be VERY close.

Hi guys, various billet turbos have come up in various threads on here of lately - particularly the Precision CEA range and occasionally the ForcedPerformance HTA range.... recently one of the more respsected DSM/EVO tuners in the US did a really thorough test between the "big guns" of the T3 range from both companies and posted a thorough post detailing the results. I figure people here might find it interesting reading, granted the boost levels are way beyond what most here will look into - but still we all like to read about boost and hp It's worth noting the Mustang Dyno that Boostin Performance use tend to give results which seem fairly comparable with Dyno Dynamics, not your typical "inflated" American dynos. The car in this thread typically traps at >170mph and has a PB of 8.27 so far. I digress: Original thread here: http://forums.evolut...erformance.html Cheers

^ EFR9180?

How much are you prepared to spend? You can go from reasonably responsive 300-ish kw all the way to ultra responsive 300+kw and spend a very different sum of money. An outright optimal 300kw setup would feature 6boost twin scroll manifold with twin wastegates, EFR7670 turbo, G4 Link ECU with Link boost control, a set of ID1000s and a Walbro E85 friendly 400+lph fuel pump. Then you could go E85/flex fuel and make well over 300kw...

Yeah it's pretty clear it has plenty more flow in it - no question of that, for the lag it'll make way more than a GT3582R. I am most familiar with hub dynos, and the .82a/r T3 single scroll GT3582Rs tend to be all on by around 4300-4500rpm so barely any more lag considering the extra power but I'd have guessed it to be noticeable.

Very nice power! Looks a bit laggier than a Gt3582r, which isn't really that bad news on a turbo that will make as much power as this if you tried pushing it :-)

This did a single run down the 1/4 today with a soft (ish?) launch and low boost and ran 9.05 at 152mph running straight and clean. This thing is going to be fun to watch as Robbie starts pushing it!

2000cc injectors, GTX35R, Ethanol - why no more boost?

Similar to my thinking. What ECU is it running? Spend the money on converting to flex fuel perhaps? I have often thought that an RB25 running a GT-RS would be loads of fun with a bit of boost and E85

Don't know why you didn't do what I just did, which was search for it on youtube - but here, one of the more fun ones: I trust you'll be able to work out how to find the others from there

There are vids up of dyno skids on pump gas and the 1200hp run - it is quite the monster, love it

Oh yeah, forgot about that. What do you mean by contigency, JD?

Well 280-290kw with full boost at 4000rpm isn't too shabby for a JB turbo, though no better than a Kando T67 in spool and a bit concerning if IATs are getting unacceptable. Sounds to me like the Kando would be a better unit for this kind of setup, though the ball bearing unit would no doubt be quite a bit nicer.

Was this 5558 ball bearing or journal bearing?

TL DR - too long, didn't read... What most people seem to react like when you give everything they need to answer their question.

Go to World Time Attack and tell all the quickest guys in the world that they are wrong. Then don't come back

Nooooooooot

Sadly this usually proves the better way to go on forums as well, when I cared more I learnt what TL;DR meant. Regardless, your posts make you one of very few forum folks who I reckon would be good to have in a room for conversing about shite like this - as opposed to slap my forehead. Regardless, its nice having an OP asking interesting questions and having interesting quality responses

Have you tried enabling the low res trigger mode the Link (and presumably the Vipec) has? I can't remember exactly what they call it and my laptop is dead so can't check it, but it is designed to cope with issues with high res optical sensor setups like Nissan ones... iirc it effectively absorbs the signals and treats it like it is working off a 24-1 disc

Different engine dynamics from the long stroke 4 banger, I don't think the turbine side is the problem. At the end of the day the exhaust gas to supply 170kw is not going to tax that combination of turbine housing and wheel if everything else is doing it's job right. I am curious to know if you are getting the hot turbine temp even off boost? Who tuned it? I know folks making more power than that with that kind of boost on SOHC 4G63s on a much smaller TD05 turbo.... So ythis should have no issue with making more than that turbo with everything working right

Wow that is real impressive for just water injection! Looking forward to seeing results

That is weight, not size. Always thought (still can't see any reason not to think really) that buying a GT4508R with a TiAL SS VBand turbine housing would be basically the same thing?! Changing that housing from the filthy big industrial thing that comes from Garrett is meant to reduce the overall turbo weight by about 33pc apparently. T88 is a totally different turbo from a totally different manufacturer, glad you didn't go there!