mambastu

Pm'd you mate

Another good thing about the -10's are that they're a bolt on whereas the 3071's are going to need custom dump pipes although Rob could obviously knock those up for you.

Might be worth asking this question on GTROC, a few of the fellas have run GT-RS's on OSG RB30's. Spec-wise the 707160-10's are very very similar to the GT-RS with the exception of the HKS GT-RS ported inlet.

Have you thought about Garrett 2860R -10's (707160-10) ? Spec-wise they appear to be very similar to the GT-RS's. http://homepage.ntlworld.com/tbroom/Turbos.htm

Hi fellas, Just spent the last few days reading the thread Theres some good info here. I've got a few questions that I don't think have been brought up before or if they have they've not been completely answered anyway. Does anyone have any piston/pin and conrod weights for the standard RB30 parts compared to the aftermarket options ? At the moment I'm looking at CP 9.0 to 1 pistons and Spool rods so would be interested to know if they're lighter or heavier than the standard parts and how they compare to other makes. I've been looking at balancers from ATI and Ross. The Ross balancers seem to be quite cheap in comparison to the ATI balancers. Are they comparable or are the ATI balancers worth the extra money ? Does anybody have the correct part number for the ATI balancer I'd need to replace a R33GTS-T series 2 RB25 balancer retaining the Alternator/Power Steering and A/C belts ? Cheers and happy New Year

doh!

It looks really good Would it be possible to have a switchable MPH/KMH and Centigrade/Fahrenheit option on the final version ?

Yes, you can use the S13 gauge sender. Its pretty innacurate though. Doesn't start reading to 50 + degrees and doesn't actually read over halfway untill around 100 to 105 degrees. The engine thermistor that the Power FC is reading is a much more accurate way of reading the temperature. You can screw the CA sender in the same place that the RB25 one fits. I've ditched my standard gauge completely now and use a Defi HUD to monitor temperatures. What sort of radiator fan, intercooler and front bumper have you got and is it a european 200SX i.e hatchback RS13 ? I've found the RS13 does need a lot more thought when you fit an RB, particuarly one with two turbos as it has much less grille area than a Skyline. Even with a aluminium Koyo, efficient shrouding and the biggest fan you can get on it cooling is very marginal when stationary, slow (sub 40mph) and also at sustained 85mph + speeds.

Hi Fellas, Can anyone tell me if an R33 GTR pump is the same as a R33 GTS-T water pump ? I have a new water pump which is supposed to be a R33 GTR pump. The part number on the box is 21010-21U26 but it appears to be exactly the same as the old R33GTS-T pump I'm replacing and I thought they were different.

I wish I was involved in circuit racing but my budget limits me to the occasional trackday. Only did the one last year but hopefully get a couple more in this year. You can see from the video that the turn-in is great on track and the car is nice and balanced, not a chronic understeerer as you might think with the six up front. The cars my daily roadcar so I'm keeping it strictly road friendly - no stripping it out or silly hard spring rates.

No, the whole car is just under 70kgs heavier now than it used to be with the CA with T3, 460's, Z32 MAF and FMIC. Thats RB25 with RB25 gearbox. GTR manifolds/turbos, custom stainless inlet pipework, twin custom downpipes, GReddy plenum, GTR (R34) front mount IC, 550's, Z32 MAF. You can trust me on this...I weighed it before and after with a full tank of fuel and fluids to keep things constant The gearbox is a little bit heavier but no-where near 100kgs. I have saved a little bit of weight with a slightly lighter front bumper assembly, 1 piece prop and the wheels are around 1 to 2kg lighter per corner. However I've also fitted larger front and rear disks and GTS-T calipers on the rear which would have offset some of the weight advantage of the wheels.

The weight distribution point is always brought up with the RB into RS13 conversion and in reality (not theory) it makes bugger all difference to the way it drives. Mine is overall less than 70kg heavier with the RB25DETT in it than when it had the CA and some of that weight is behind the front wheels i.e heavier gearbox, dual down pipes etc. People tend to forget also that the SR is a heavier engine assembly than the CA is and so the RB swap makes even less of a difference in a later 180SX. We've found in the UK that a standard CA'd RS13 has a 51/49 FR split. With the RB25 the split goes to 53/47.....around the same as a standard S14 I believe. How does that compare to a R32/R33 GTS-T out of interest ? I use mine mainly on road but I have done a trackday at Brands Hatch in it with the GTROC guys and it seemed to handle better than a Ferrari 355 that was circulating on the day and I've been told they're pretty trackable in standard form. Its fairly well developed suspension-wise with coilovers and castor/camber/toe corrected to get the best out of it. It could do with some chassis stiffening really. The RS13 shell isn't the stiffest around. As regards 400bhp being enough in a RS13.......the chassis is more than capable of taking more. Traction is good but the smooth power deliverys probably helping that. I reckon it would be a bit ragged in the dry with 500 ish.

I have a RB25DETT (pair of GTR turbos on it) which is producing 405bhp (353bhp at the rear wheels). Used to have a 330bhp CA18DET in the car and the RB is so much nicer to drive. 1 bar boost at around 3600/3750 rpm and pulls hard all the way through to the raised rev limiter at 7500rpm. Fairly mild state of tune at the moment and driveabilities excellent. Makes for a very nice and reliable road car at that sort of power level. Traction in the dry on 265/40x17 rear Toyo T1's and Nissan VLSD is reasonable. Spins the rear wheels in 1st/2nd only in the dry, 1st to 3rd in the wet/cold. The smooth power delivery really helps get the power down. Few pictures and vids of the car on http://www.mcse100.fsnet.co.uk/The%20200SX.htm Relatively easy to do the conversion, the wirings the worst bit. It needs much more cooling than a CA or SR. Does around 260 miles to its 60 litre tank on a long run, much less when its driven properly though

I know a couple of people who have fitted these 3071r .63's to SR20DETS and they suffer from really bad boost creep. One of them is having the internal wastegate modified (enlarged) to try to alleviate the problem.

Thanks for the replies fellas. Received an e-mail back from Davies Craig today and looks like the EWP 80 is too small for an RB and the EWP 110, which would be fine, can't be used with the current controller. There will be a new controller out in March/April apparently.

Hi all, Can anyone tell me the standard radiator core sizes (H x W x D) used on R32, R33 and R34 GTR's at all ? I'd also be interested to know how big the cores are on uprated GTR radiators too as a comparison if anyone can help.

Has anyone fitted a Davies Craig electric water pump to their car at all and if so how have you found it compared to the original mechanical pump ?

I see that Nengun list two different part numbers for the 256 Poncams on the RB25 in the R33, series one and series 2. Out of interest which part number did you order and is yours a series 1 or series 2 and can anybody tell me what the cam differences are so I don't end up ordering the wrong ones

Yes, I made a simple flat plate flange out of stainless steel and welded a bit of 76mm pipe to the inlet side and then used silicon pipe to connect it up to the rest of the 76mm custom intercooler pipework. I've used a GReddy E-manage to handle all the fuelling changes.

Yeah, RB25DETT does cause confusion sometimes The Z32 MAF is at inner wing height on the left hand side of the picture above.

I have a 'blow through' AFM on my RB25DETT, works fine

Is it possible to see a modified version of that graph with rpm instead of speed ? I'm interested in the response of the 2530's but I'm not sure about the GTR gearing.

I also have a RB25DETT but in a RS13 and it doesn't sound quite the same as an RB26DETT to me. I suspect the RB26's throttlebodies are the main reason. A RB25DETT does sound gorgeous though, a bit higher pitched than the GTR's I've been in.

I have a twin turbo RB25DETT in my S13 and I'm using an E-manage with a Z32 MAF after the intercooler in a blow through arrangement. It works really well. I trialled it on my old CA18DET before I fitted the RB25. It worked well on that too at boost pressures up to 23psi but I found that you need to have reasonably stable airflow through the MAF. On the CA I had around 6 " of pipework between IC outlet and MAF and 6" between MAF and throttle body. On the RB25 I have around 12" before the MAF and 12" after and its easier to tune as the metering seems to be more stable. It also use a vent to air BOV after the turbos and before the MAF and I don't get any nasty overfuelling when the valve vents.

Wonder if that works on the R33 series 2 as well. I get the engine check light too now I have the ignition harness connected. On another note I tried one of the new GReddy E-manage knock sensor adaptors the other day on my RB25......it didn't work. Just throws a knock sensor fault