Cubes

You have to use the R32 RB25DE inlet manifold but can use the R32 RB20DET inlet plenum. Port sizes are different. The R32 RB25DE doesn't use piston oil squirters. Piston oil squirters are good and will allow you to make a little more power on the stock pistons. One has to look at the VLT's to know for street use they are not a necessity. I'm not running piston oil squirters in my rb30det but I run forged pistons. If I were to do what you are thinking about doing, I would slap a set of GTR rods and crank in the r32 rb25 block. Everything else in the r32 bolts up and it literally looks like an RB20DET, you could not tell unless you drove it or pulled the head off and measured the bores. I say do it. You won't regret it. My RB30DET with 9psi on the stock turbo made 176rwkw, the rb20det required 15psi to make 164rwkw. Goes to show how much better the rb25 head flows, not suprising when you see the rb25 inlet valves are 5mm bigger EACH!

There is really no direct comparison between a comp ratio and the psi a comp tester will show as cam overlap between motors is different. The only real way is to compare a result is to that of the factory result. i.e if you run a R32 Rb25DE N/a head, compare the pressure reading to that of the factory specs for that head. Cam overlap bleeds off cylinder pressure. Slap massive cams in the sucker and it may show 110psi. I'll be comparing my reading to that of the R32 rb25de head as I'm running that head and stock cams with an overlap of 8degree's. The Turbo cams run 0degree's overlap apart from the RB26 head.

StockyMcStock, Free running as it spins over by hand easily? I had the sparky's in mine and couldn't spin it over by hand. Without the sparky's it spun easy, my other half still couldn't spin it over by the harmonic balancer though. The RB20DET on the other hand.. lol that was suprisingly easy. Comp in the rb20 was still 145psi+ aswell. Once in the car the motor bike battery had trouble spinning it over. The rb20det was no problems. Nice big 480cc has done the trick. I still suspect my rb30det is running around a 9:1 comp ratio. My calcs tell me 9.2:1 with the piston comp height etc.. The engine builder said around 8.2:1. I used Wiseco Rb25DET pistons and had the block shaved .020". I remember seeing another person in this rb30 thread a little while back state they are running wiseco pistons and apparently they were told they will have a 9:1 comp ratio.

Even though the rb30det boost up super quick I still find it quite easy to bleed boost off and drive off boost. Wet weather driving is much quicker than the rb20 as it doesn't bog down then all of a sudden boost, there is also much more throttle control. Basically it feels n/a delivery with much more in the mid range if you put your foot in to it.

Its an RB30DET that's had a bit of headwork.

I'm not too familiar what comes with the guages. With the oil temp and pressure do they come with the required sensors? I've seen some guages state (inc. oil pressure/temp sensor).

Please be super carefull. As the cams are designed for solid followers the ramp rate is much higher, you don't want to be slapping that valve in to the high compression rb25det piston.

Does the link run utilize the O2 sensor? PFC is a damn good no frills ECU. 6 inj drivers - Sequential inj. 6 coil drivers Boost control Injector Warning Air-flow warning Knock Warning O2 Feedback (Closed loop) VCT Control fuel cut (rpm, overboost etc) Perfect cold and warm start Excellent idle control that rocks ign. timing and utilizes the AAC valve to hold flat idle. Water Temp Compensation Accelerator Pump Airflow (load) and RPM scale is able to be modified Ign. vs water temp correction Ign vs air temp correction Cold start ign. retard correction table to aid in engine warm up and drivability, emissions blah blah Ign vs boost correction Ign vs battery volts correction Ign Dwell vs RPM correction Anti-Lag PFC versions are available that have launch control, ign cut instead of fuel and MAP. What are the tech. specs on the Link? O2 control, inj. and ign. drivers, total load and rpm points available etc?

Nozilla, Be sure to use a GOOD water/air filter or what ever they are called.

150-165rwkw Depending on fuel afrs

I did it in mine today. Stock Rb20DET Turbo running stock boost. Boost and surge under 2000rpm, as soon as 2000rpm hits it kicks and breaks in to a wheel spin at this time it looks like its wheelspinning around 2300rpm or so. Just a pitty the power drops off rapidly after 5000rpm and peak power is made around 4400rpm. lol

The issue with the old GCG 500hp highflow wasn't boost creep (where boost cannot be kept down, creeps up as revs increase) the issue was with surge. A larger exhaust a/r was needed to help shift the full spool a little higher in the rev range where the motor can consume the air better. I'm unsure of the differences between the 500hp and 450hp highflows they offered, I assume it was the compressor size. It looks as if the GCG Highflow on the rb25 would be very similiar to the XR6 Turbo on the Rb30. Spool wise.

Basically the new gen core is rated to flow more, the older core is rated to flow less. If it's possible to use the new gen core with the internal gate housing i'm not sure, if it works well is another thing, you may experience surge with a small exhaust a/r?

I've actually grown quite fond of the slight slap noise.

The 2835pros isn't 4k if you buy from greenline/nengun.

Apparently its optimal to have the car run in closed loop up until around 30rwkw. I think the PFC uses the fuel map to determine when to bump out of closed loop mode. Once the fuel map value goes over 1.047 or something. It may also have a little to do with the throttle position sensor. I really have no idea, possibly its a little of both.

No go for the 044 as the payment date doesn't line up. I may be able to get it cheaper anyhow, I'm waiting to hear from a friend as he is able to get Bosch items generally very very cheap. I bought a Z32 AFM through him for $280 bran spankin new. Depending on his price I may still need it. But I really should get injectors first.. lol to many things I need to buy and not enough money. lol

I want to see pics I was going to grab an 044 in a week but my bosch 910 does the job well enough for now, IF I see pics I may grab one of these.

Damn the payment due date is 1 week too early. I am after an 044.

Mine changes boost really easy. I was actually worried that there wasn't enough thread screwed in and it may wiggle its way out. Its perfectly fine with the lock nut though.

The origional lasted 120,000km's

Anything you wish to share. It would be nice to see the turbo on and also the turbo off, i.e its exh. wheel etc.

I've replaced mine around 20 years and 60,000km's ago. The new clutch has caused this one to have an internal leak that bleeds off slowly. The same as what is happening to Darrens.

It will be good to see the results bigcarl. Have you any pics to share? ------ My airflow calcs tell me the RB30DET should have the XR6 Turbo on song around ~3600-3700rpm. Doesn't sound so bad and it would definitely free up the top end VE for the 3ltr extending peak rpm power.

Thanks. No doubt a few will be keen to see the results.