Cubes

Don't know.. I didn't even know what I meant.

Kikuchi, A car club is a lot of work, maybe you would like to be the man?

whats allright? all right until some one looses an eye?

I've never goo'd gaskets. I have always soaked them in engine oil. Thats including inlet, plenum etc.. EVERY paper gasket.

Do remember offering a product such as this he will receive a lot of emails from time wasters and also people who do not know how to fit the controller to their particular car. All of which spam the crap out of his inbox. I would hate to see his inbox should he not check his email for a couple of days. :

Shaft play is a definite worry.

A Doc Johnson oil restrictor should help reduce blow by. It looks pretty damn big though, may restrict a little too much.

Please don't compare a 7second motor to a motor that has hundreds of heat cycles and clocks thousands of km's. The engine setup, bearing clearances, piston design required are much different. When you say ' the way they are made' I'm assuming you mean the design. Maybe he doesn't like the slipper type design in the street motors?? Slipper design reduces friction but also increases bore wear, the wiseco pistons lean a little more towards a true slipper than the rest of the pistons on the market (as can be seen by the pics I've posted). But its all in the R&D, unless Scott has had experience with a high km RB running these pistons he really can't apply a general theory as he simply does not know, the fact is the wiseco's do work extremely well in the rb30's. I really tend to believe one who has had been working on and rebuilding the rb30's for up to 20years than one who attempts to put his experience with an sr20 to an inline 6 that isn't even released in the US. Its all about experience with a particular motor. No doubt he is a wizard with the sr20 and knows them like the back of his hand, but the RB30??

A few piston pictures I've collected over the last couple of years. Wiseco, JE, CP and Arias. Note how Wiseco and JE have the same top ring land design (lots of little grooves) compared to the others that don't, must be something in it. The only bugger about JE is they don't appear to list a piston to suit the RB30 or RB25, no doubt they must have one as its what I believe SK runs. The RB26 piston I don't believe can be used as the compression height is too low 1.81" vs the 1.260" that is needed. If the rb26 piston is used in the rb30 it will sit too low in the bore and there's no way your going to shave a little over 1mm off the block. :S A custom JE piston may be required. IF JE made an rb25det piston (which they don't appear to do) then you can simply shave 0.020" off the block as the rb25det pistons have a compressio height of 1.240" so yer.. 0.020" lower in the bore which can be sorted by decking the block.

92% duty was when it was still running on the stock injectors. 260cc items @ standard fuel pressure. I rewired my fuel pump so it saw full voltage underload which did give it some more head room, I didn't bother tuning to see exactly how much but it was definitely running richer after the rewire. I now run GTR injectors which with a little fuel pressure should suffice for what I am after. Sir Racer, As I said.. Use the piston your engine builder is comfortable with. What piston does he recommend for the RB's? You then can't go wrong. All the major Arias, Wiseco, CP, JE you cannot go wrong with providing the engine builder is familiar with them. Some have had problems with Venolia and their pin/skirt design in RB's, but do remember, a forged piston brand that may be good in a sr20 may not be the best in an rb. Some don't like the lack of tapered design towards the top of the piston Wiseco don't have, but what they fail to see is the piston has been designed not to require a taper. Its all about having an engine builder that has experience with the particular engine they are building. EDIT: It appears Scott uses JE Forged pistons.

I too have found Kenwoods to be sensitive to scratches and bumps, especially with burnt disks.

Did he state why he didn't like Wiseco pistons? I've done 40,000km's with mine that have been setup with the looser bore/piston clearance to suit wiseco's 'race/24+psi', still exactly the same piston slap when cold as day 1, zero oil usage, perfect compression all within 1psi. On that note... Always use the piston the engine builder recommends as he is familiar with any little quirks and or requirements the piston has. Its bad to let a motor idle waiting for it to come up to temp. I wouldn't be following his recommended run in/heat cycling procedure.

Its not so much the load that a dyno can place on the motor its the flexability of being able to run it in quickly with varying loads that are difficult to replicate on the road due to traffic lights, traffic and.... police. I ran mine in along christies beach -> moana seafront, lots of accelerating out of round abouts (no decelerating), wastegate wired open as to make sure I can get that throttle wide open.

I believe it was a manual that went to auto. Unsure what 3300rpm was with. Time will tell.... <looks at Darren, where's that guinea pig photo> I should mention fatz made the inital 270rwkw on 13psi, he is now running cams.

It shall be interesting to see if the 4 valve head offers any improvement in spool. Fatz and his rb26 with the stock ecu had his hitting 17psi (from memory) by around 4500rpm on a stock rb26 ecu, from memory that made 270rwkw. After a tune that was brought down to 4000rpm and made 294rwkw or something at 15psi. That is an RB26 so no doubt the plenum is possibly helping spool a little maybe?? That being said i've 'heard' *calaisturbo.com* some have the xr6t turbo on their rb30et spooling to 10psi by approx 3300rpm. BUT.. spool is extremely subjective. Even if it is a little laggy it shouldn't be too long before garrett release these internal gate .82 housings for the gt35r. For the price paid it was an absolute bargain.. Too good to pass up. If I had the money now I would grab one, hopefully he is still able to get one in another couple of weeks.

VHR32, 68 - 37 = 31psi extra.. He states its running 15psi boost, thats a 2:1 fpr. Stocky, The fuel pressure and injectors then fit the bill but shiet... 15psi making almost 300rwkw with such a small turbine housing, comp cover ?!?!?

So your running a 2:1 fpr vs the std item that raises fuel pressure 1psi for every 1psi increase in boost? Interesting.

Unsure if it would be double.. Only time will tell. Hows yours going anyway??? Up and running yet?

Even then its not difficult to rectify, simply dial in 142% in the injector correction. old injectors / new injectors * 100 = injector correction

RB25 and RB20 injector impedence are high. GTR is low, they run a resistor pack so the ecu's are essentially a high impedence.

Load points have nothing to do with the map reference scaling. If you were to run a standard AFM load point 17 may be 5.1v. Drop the Z32 or Q45 on there and voltages may drop to 4.2-4.3v, so you have go tmore head room but to use it you have to adjust the map reference. The reason the RB30's run in to trouble on the std map early is due to making so much more power earlier on in the rpm range. As rpm increases the map references allows you to make more power. If that makes sense. Those last 2 cells may allow another 50rwkw or so. One will only know when they tune it. When Darren was running the stock rb20det map reference he hit load point 20 at 200rwkw, the rb20det's are easily able to make over 200rwkw on the standard map as they make it higher in the rpm, so in a way think of the map reference as a reference for torque, the more torque you make the higher the load point you use. Less torque higher rpm = more power. Got off track there but anyway, once Darren dropped the rb25det map reference in there that gave him a little head room he was able to dial in another 1psi and make 218rwkw. Hope that made sense, I can't be buggered reading over it. lol

I've seen the Stagea with R34 front.

It means... your right... ~200rwkw possibly a little more. Darrens hits load point 17 and according to the datalogit airflow values is very very close to jumping in to load point 18, his is making 218rwkw. Mine... Hits load point 17 but by 4500rpm+ has dropped back up to load point 16.

GTS4Newbie, You say deceleration derichment or what ever it is. Do you mean deceleration fuel cut or ?!? Thanks for sharing your setup. I really need to get my hands on a wideband for a few days.

Take it back to the tuner and tell him under what conditions (throttle position (full, 1/2, 3/4), air temp etc) it knocks. It may knock for example when you jump on the throttle at 5000rpm or it may only knock when loading up a high gear up a hill.