juggernaut1

Terminal speed accounts for nothing. Its the highest average speed that results in better lap times. Just because they had near identical terminal speeds ignores which car was travelling fastest down Conrod for the longest. At higher speeds it takes a exponentional amount of hp to punch a hole through the air. Those cars could have been within 20hp of each other and still ended up with near identical terminal speeds because or wind resistence, gearing, etc.

I think some sensors work better when they are in the flow rather than just being submersed.

Matt, I used to have my temp sensor in the sump too (greddy pan on SR) and found the temps weren't representative. For instance it would drop back to 30 degrees when cruising on the highway and saw about 60 degrees max. I then shifted the sensor to the grex relo block and instantly I get oil temps at or slightly more than water temps which seems more legit.

Will do

I used waterproof foam rubber for cooling guides. Its available from clark rubber in sheets - its black and at a guess about 2cm thick. Becuase its waterproof it doesn't hold water/moisture. I used an electric carving knife to cut/shape. The beauty of this stuff is that it retains its shape because of the thickness but will give enough to almost create a firm sealed fit between the panels and fit around wiring looms and other imperfections. It also doesn't rattle/vibrate and as it is black.....has a stealth look about it. Because I oversized it, it wedges in between the relevant panels/cooler/etc so it doesn't require any dedicated fixing....however, this would depend on the span as the larger the span the more likely the need to specific fixing. Which I would imagine could be achieved with aluminium strap.

Same observation here with my SR with grex relocation setup and Drift filter. I've been thinking about redoing the relo kit so the filter hangs down therefore the filter is constantly full. Can someone actually confirm the Drift filters actually have an anti drain back valve?

I've seen that vid before from 3.15 onwards...much tidier....but then again Silverstone is a beautiful track...long wide sweeping corners.......if only we had those types of tracks in Oz . Yes I'm sure the video link I posted of that car was a bit of a "promotional video" and clearly was not some of Olly Clarks best work.

You mean like this: This car has also won the UK time attack pro class season for the second year running.

No problems Dane.

As I have an SR I would have stayed with the .78 or .82 and matched the compressor accordingly for a good street/track package. If you did more drag then the 1.06 wouldn't be out of place on a 2 litre. RB's produce more low down torque as well so a T3 1.06 with 3076 56 trim would probably work well on an RB25 in most situations. My purely speculative choice of turbo's/housings match would be as follows: T3 .78 with 3071 T3 .82 with 3076 52 trim T3 1.06 with 3076 56 trim T4 1.06 with GT35

Hmmm...we'll see as I was actually going to mate the extruded honed .78 straight onto a 52 trim 3076 rather than back onto the current 3071 setup. Souldn't be too hard though as I will have two .78 housings (1 standard and 1 extrude honed). However, Phunkey (Dane) has bought my std .78 and 3071 setup....so will have to run it by him first.

Tell me about it....I've just had the .78 extrude honed....Lol.

Yes the divider causes some reduction in the volume of the ex housing. Not sure if I would mate a .82 divided to a 3076 56 trim compressor on an 2.5 litre RB.....but it would depend on engine specs though. I know Full-Race has used the 1.06 divided on a stroked Evo motor but the heads in those engines flow very well. Moreover, the Garrett twin scroll bolt-on upgrade kit for the Evo X has a .94 divided housing with the 3076....however they have a unique footprint so may not be comparing apples to apples when comparing to a typical T3 housing.

For the sake of completeness to this thread (and for those who are a little more adventurous) I thought I would link an update from the ATP turbo website - which shows that Garrett has released off the shelf T3 .82 and 1.06 twin scroll V-band housings for the 3071/3076/GT35R range of turbo's. These housings compliment the existing .78 twin scroll v-band housing available for these turbo's. Cost is US$395 for the .82 and 1.06 and US$295 for the .78. http://www.atpturbo.com/ Cheers

I for one ordered one from GCG before Christmas (with the bell mouth insert) and will team it with the twin scroll .78 ex housing that has been subject to extrude honing and will swap it over from the 3071/.78 setup. I just felt that a 3076 56 trim will not realise its full potential with the .78 ex housing and didn't want to suffer the consequence of additional lag for a power figure that would be capped by the ex housing. Possibly if I was running E85 I would have fitted the 3076 56 trim as this fuel seems to somewhat shed the effects of smaller housings. But until E85 beomes commercially available in WA, the 3076 52 trim with the honed .78 ex housing seems to make more sense as an overall package on the little SR.

http://www.skylinesaustralia.com/forums/Su...kw-t233030.html

Would have been good if the boost levels were identical......and your wastegate woes fixed ..........for a true back to back comparo. Great comparison anyway for the purposes of this thread.

Spewing

Hi Dane, GCG can get the 52 trim in for you. I haven't spoken to Geoff about it....and I don't believe they offer it.

Unfotunately there is no universal .94 twin scroll ex housing. The .94 I mentioned is purely a bolt on proposition for the Evo X which of course has a different footprint to the generic T2 / T3 / T4 fottprint Garretts. ezy 9's: you'll be happy with the throttle response of the .78 especially on a 2.2. If you refer to the Full-Race website, they recommend that you grind back the CHRA bolts so they don't protrude into the volute of the housing.

Strewth....a Datsun 1600 is going to be a handfull with a twin scrolled 350rwkw on E85 if your goal is reached. .78 could be a too small for a 22vet motor. However, E85 seems to somewhat delay the effects of going too small a housing based on what I've seen. In addition to the .82 I mentioned a 1.06 housing is also available from GCG in T3 format......I see ATP also lists a T4 twin scroll housing for the 3071/76 turbs. Your only other option would be a switch to the BW twin scroll turb's....although dyno results are as rare as hens teeth.

I hear what you say re the background of the .78 a/r thats why I mentioned I make peak at 7700rpm as some sort of evidence (or luck) that it does flow at these rpm and makes 290rwkw in the process with the 3071. Did you have a conclusion to my "theorising" as to whether to go a 52 trim or 56 trim.

Currently have a twin scroll .78 3071 setup on my SR with 290rwks at 22 psi....max power at 7700rpm I was going to swap in a 3076 56 trim CHRA.......cos I can't stop tinkering and evolving my setup. However, I note that the Evo X Garrett upgrade turbo specs in a twin scroll format are: 3071 56 trim comp / .73 ex a/r 3076 56 trim comp / .94 ex a/r This then suggests to me that my current .78 ex a/r might be too small for a 3076 56 trim comp as Garrett has used a .94 ex a/r on a 2 litre Evo motor. The 52 trim comp 3076 falls roughly between the 3071 and 3076 56 trim. A rudimentary and purely unscientific calc shows that the middle ground of the .73 and .94 ex a/r is approx .83 a/r. OK so .83 is still bigger than my .78 but I was thinking of having the .78 e/x a/r extrude honed and I have a few other tricks to try which would give it a bit more flow. There is a .82 twin scroll ex a/r available via GCG however its a different housing altogther meaning it places the turbo in a different position to the .78. The .82 also needs profiling and as it only has a slip joint outlet, a v-band or 4 bolt outlet needs to be welded onto it. Plus I haven't seen any solid results from the .82 twin scroll housing - so its an unknown. So my conclusion was to stay with a .78 ex housing with extrude hone and fit the 3076 (3037) 52 trim turbo instead of the 56 trim. I'm after the optimum 3076 turbo comp/ex match for all round efficiency spool/response Do people concur with my thoughts or am I just over analysing things and should I just go with a 3076 56 trim? I will try E85 in the future - I have a 205 litre drum at home to try and will run it full time if the stuff every becomes available at the pump<<<<< just mentioning this in case that would sway your decision re a 52 or 56 trim. Cheers

Get your friend to contact the bank that the bank deposit was made into and advise that he has inadvertently transferred 2K into the 'said' account and would like it refunded.....that should get the ball rolling.

Oh yes I also check the same ramp rate is used too Trent.....I just assumed that was a given. In the case of DD dyno's ....I also check the difference btn the ambient temp (AT) and intake temp (IT) are also not more then 10 degrees different <<<< thats just my personal tolerance, and that shootout mode is used.