Qs for RB20 Owners

[Duncan]

I'm sure they just leave km/h on the bottom because it is easiest for the dyno operator...they don't need gear or diff ratios for each car. It is of course bloody useless for everyone else untill you convert it

[Roy]

I didnt see the last bit of tuning or the dyno run for which i got the printout....but all other uns i did see were always in 4th gear. The dyno sheet doesnt list all the parameters so i dont know. Im welding up a middle pipe to replace my cat and centre muffler then going to give it another run to see if power and response is helped.

I suspect they stopped the dyno run at 6,100-6,200rpm because power starts to taper off and this car has been jinxed whilst in their shop...so i think they were glad to hand it back in one piece:)

Im confident its 4th gear, just based on the way the turbo spools and how it matches the plot...and in 3rd gear that equates to just over 8,000rpm and i have my rev limit at 7,100rpm for the time being:)

[Roy]

...And PLEASE kick some GTR arse

LOL..i dont stand a chance, but it wont stop me from talking it up and making them get off their a55es and get out there and prove it:thumbsup:

[Chris32]

Interesting how RB20's cams seem to be restricting it to peak power just after 6000 rpm, this is very similar to what mine was like on the dyno the other day

I installed my PFC boost controller kit on the weekend (Targa Tom, thanks mate!) as mine was dropping of boost after about 5500 rpm, it would drop from 17/18spi to 14/15, peak power was at around 6200rpm, 205rwkw and after that it would drop of pretty quick, with 7100ish dropping back to around 190rwkw

Will be interesting to see how the boost controller performs with the boost drop off.

If cams are the problem, then I have a set of GTR cams that I could put in later on

[Roy]

Chris...whats your email... i want to post the PFC tune Spreadsheet but dotn have Winzip:(

[Chris32]

pm sent mate

[Sydneykid]

I'm sure they just leave km/h on the bottom because it is easiest for the dyno operator...they don't need gear or diff ratios for each car.  It is of course bloody useless for everyone else untill you convert it

Or too lazy to connect up the rpm lead.

[Duncan]

Or too lazy to connect up the rpm lead.

true, but thats not straightforward on a series 2 rb25 is it?

[rb20-calais]

ok rb20s are strong

saturdays drag day i did 48 runs a new WSID record, i turned the car off once or twice for 10mins all day, i literally did a run went around and did another

temperature stayed very low the whole time, at the end of the strip when i was doing a u-turn temps were back to my normal cruise temp.

best run was 45th run. 12.987 @ 104mph 1.8 60'

i have 199.6rwkw hks 2530, gtr inj, wolf, eboost

car was strong as an ox all day

i ran about 6+ 13.0*

rb20 power!!@!!!!

Evan

[Chris32]

Great stuff, excellent time, well done!

[Roy]

ok rb20s are strong

saturdays drag day i did 48 runs a new WSID record, i turned the car off once or twice for 10mins all day, i literally did a run went around and did another

temperature stayed very low the whole time, at the end of the strip when i was doing a u-turn temps were back to my normal cruise temp.

best run was 45th run. 12.987 @ 104mph 1.8 60'

i have 199.6rwkw hks 2530, gtr inj, wolf, eboost

car was strong as an ox all day

i ran about 6+ 13.0*

rb20 power!!@!!!!

Evan

A friend was telling me about your effort on the weekend:thumbsup:

[Sydneykid]

true, but thats not straightforward on a series 2 rb25 is it?

Easy peasy Duncan, just stick the trace wire in between the #1 spark plug and the coil, works a treat.

[FATGTS-R]

Finally got my car back!

R31 GTS-R RB20 eccs red top. Only mods are Autronic ECU, exhaust and pod.

185rwkw. Was over 220kw but injectors and pump were begging for mercy.

Boost ramps to 18psi just over 4,000 and then settles at 14psi 4800 onwards.

They say an EBC will get me a more stable boost curve.

[Roy]

Looking at the RWD and power delivery. In 2nd gear it equates to about 190rwkws at about 60km/h and the thing gets power down nicely with the susp setup i have.

If i go to a smaller exhaust housing to get the thing coming on boost earlier and i am making about 190rwkws at 50km/h is it reasonable to assume i will still be getting good power down?

Gave the car its first hit at 1.3bar yesterday in 2nd thru 3rd gear...have to say the look on my face was as though i had just screwed the neighbours daughter:) So if the smaller housing means mroe response great, but if it means traction probs in 2nd gear then im less interested in the trade off?!?!?!?!?!!!?

[Chris32]

I'd say you might start to get traction problems mate, as with more power + less speed, I reckon will result in wheel spin

Mine comes on pretty hard at about 50ish, haven't really looked at the speedo, but sometimes is does wheelspin, depends on the road surface etc

I'd wait until you get a few good laps in and see what its like on the track, I reckon it would be perfect!

[Interloper]

Gave the car its first hit at 1.3bar yesterday in 2nd thru 3rd gear...have to say the look on my face was as though i had just screwed the neighbours daughter:)  So if the smaller housing means mroe response great, but if it means traction probs in 2nd gear then im less interested in the trade off?!?!?!?!?!!!?

LOL, i had that same look when i boosted my newly tuned GTS4 with 1.3bar.

It absolutely transforms the car compared with when it was stock, I'm sure you agree Roy

[Targa Tom]

Looking at the RWD and power delivery. In 2nd gear it equates to about 190rwkws at about 60km/h and the thing gets power down nicely with the susp setup i have.  

If i go to a smaller exhaust housing to get the thing coming on boost earlier and i am making about 190rwkws at 50km/h is it reasonable to assume i will still be getting good power down?

Gave the car its first hit at 1.3bar yesterday in 2nd thru 3rd gear...have to say the look on my face was as though i had just screwed the neighbours daughter:)  So if the smaller housing means mroe response great, but if it means traction probs in 2nd gear then im less interested in the trade off?!?!?!?!?!!!?

What size tyres and how sticky? We have been Running 205/50/16 in Targa, and will wear a set or two out at Basky next Month... but if I was starting from scratch I would be running 245/45/17. Propbably M1 Dunlops. The old D01J's are good for Rally, but suffer on the circuit.

We ran well in excess of -3deg camber with 225's and it was locking the inside fronts... rear still a little loose. Will come back a notch next time to give the front some push.

Seems like you have the kW, now you just need some grip...

TT

[oscar32]

Hi guys,

I'm just in the process of trying to work out which turbo to use on my RB20 R32 GTS-T. I've just had a Wolf 3d hooked up, and its already has a pump, regulator, front mont, full 3 inch exhaust - you know all the usual backup gear.

Has anyone used a hi flow VG30DET turbo, or am I betterff getting something like a trust unit. I only want 200rwkw, but would like a good useable band of power.

I'll have a dyno graph over the next few days to post with the stocker in place.

[Nismo_Boy]

and then sold the RB20DET top end for $300 to a guy who put it on an RB30 bottom end, go figga :wassup:

I didn't think you could put the rb20 head onto the rb30 bottom end? Is what your saying just a miss type? Or can it really be done?

Using my Rb20 head would be a lot more easy, then looking for an rb25 head if I went that way with a motor build up.

[ScottKing GTS-4]

My Budget RB20DET-

Imported with HKS Super Dragger exhaust and K&N Big Mother air pod

Added TurboSmart boost controller - $250, dynoed @ 150rwkw

Added Dump Pipe - $300

Added Cold Air Induction - Free

Added RB25 Turbo - $350

Added Front-Mount - $500 (inc pipes, see http://www.skylinesaustralia.com/forums/sh...ead.php?t=47918)

Added additional Cold Air Induction - $50

Next I want to remap the ECU and then it's time to Dyno it again. Hopeing to be around 200rwkw for around $1K. Then that's it with RB20DET, move on before blowing the budget.