Roy

Serisouly , if you are running the std manifold. As big a fan of the Mitsu tubos I am if I had an RB25 and wanted to run std manifold then I would go for http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=GRT-TBO-020&Category_Code=GRT

Where did you get that quote from? I had a quick read and in my opinion the assumptions are flawed.

As i posted the day McLaren revealed the car. There was so much about the car that was Melb Airport special and plastic demo bits....they dont want to give anything away and want to keep people guessing. I am still betting their car will be substantially different when they get to Australia and betting the nose is in for changes once they complete some testing I quite like the Williams. I am hoping this year is the start of changing fortunes...but only time will tell. The car looks pretty good, but lacking sponsors so another lean year of development I wish there was streams of testing. I am so hungry for the return of F1 I would probably watch it

Does sound like the turbo. But before you go spendong mony; - Does the car have its.carbon canister/ pollution gear? - Have you got the std PCV setup or running a catch can system? - Have you checked to see if its using any oil? - Is the engine built, standard...whats the history of the car?

Wah, wah, wah...head restraints , HANS ?!?! Harden up and get a titanium upgrade I am concerned that Snowie suggested i get a HANS device. Not sure what he has planned this weekend

Mint wheel and re price. If you are not in a hurry hang tough. Your problem is you are selling 17" and people want 18". And Most people buying these offset wheels are GTR folk and they want min 9.5", more often 10.5". So price is reasonable...you just have to hang on for someone that actually wants a neat 17X 9 for a non fuss install on his R32 GTR

Is it wise to throw a turbo on an NA motor that isnt running E85? Surely it makes more sense to just buy a thicker head gasket and set the CR to a more turbo friendly level?

Interesting that Unilever are onboard with Rexona at Lotus

I have only seen the one result with a T518Z 10cm on an SR20 so basing a conclusion on one car is pretty dangerous...but it appeared to offer less power than a 20G but with the same lag. So why not run a 20G and have the same drivability and make more power? I suspect that only finding one result which wasnt encouraging is the reason there are not plenty of cars out there running such a setup?!?!?! It simply doesnt work well?!?!?! I ended up going 8cm on my TD05-18G as you cant be all things for all occasions. I accept that if you go to a TD05-18G then you are going to gain response and lose power. Going to smaller turbine/compressors for response then putting bigger housings on them to make power doesnt seem to work as good in practice as it may in theory.

Thats great to know for the sake of the charts you are posting. Also, my car makes 275 on United 100RON, simply cant take the ignition of that tune if I run 98 so it drops to 260rwks on 98. I personally dont like my chances of the same tuner, using the same dyno going to a smaller turbo from the same manufacturer and making the same power. I stop increasing boost when it stops making power. I get more mid torque with a few more psi but at 19-20psi there isn't much more to be had. I mention that as well to highlight its not going to be likely that I simply run a bit more boost on the smaller turbo to make the same power. I really don't know how much peak power I am going to lose going to the TD05H-18G....but I feel I may only get back to my 20G power figure with a 50/50 E85. Would love to be the idiot who has got it all wrong and am now going to make the same power with a TD05H-18G as I do with a TD06-20G (Both 8cm housings)

But my car doesnt run on Trents dyno does it Would be interesting to see what my car made on his...higher or lower...but going on the dyno that my car runs on if I make 260 out of a 18G with an 8cm housing then I am doing well, Interested to see the cars making an easy 260rwkws on 98. Looking at SR20s running T518Zs there arent too many making 260rwkws on pump?!?! 240-250 seems more the norm.

The CHRA was made up with the L2 turbine and 73HTA compressor by a turbo shop, so its all balanced and just needs lines connected and bolted up. Well at least thats the plan. When I have got my current TD06-20G off I will line up all 5 turbos and take good side by side pics and break out the verniers for more accurate measurements. I have been reading some of my old uni pump design texts and trying to get an understanding of the impact surface finish has on compressor performance. Its interesting that there are documented negatives when deailing with fluids, but harder to quantify for ideal gases. The surface finish of the billet wheel is pretty good, but looking at an EFR 7670 today the EFR turbos have a much higher surface finish. Its probably in the area of around 0.4um going by the materials we use in pharma. So may send the TD05H-18G off for some extrude honing of the compressor wheel to polish it up and see if it makes any difference in performance. Think I found a place in the US that makes billet little nuts for the compressor too so for wank will throw that on after the honing of the compressor wheel. All helps, I want to see if the little 18G can make 260rwks on E85

So... some pics of the 25G vs 73HTA compressors and TD06SH vs TD06L2 turbines Greddy TD06H-25G 25G Compressor TD06-73HTA L2 Turbine 73HTA Billet Compressor by Forced Performance Side by Side And this is what happens when you try to run an SH housing on an L2 turbine

So took some pics of the biggest TD06 exhaust wheel alongside the much loved L2 wheel. Greddy TD06H-25G 25G Compressor TD06-73HTA L2 Turbine 73HTA Billet Compressor by Forced Performance Side by Side And this is what happens when you try to run an SH housing on an L2 turbine