500 hp gtst

[actionbstard]

check kelford cams the 272s are a most have in my book.So as I wouldnt upgrade cams if I don't port&polish the cylinder head.
also if you want to run pump gas stay away from lower then 1.5 mls thinkness.
I run 1.8 but i am at 2.7ltrs.But most of my builds are runing 1.5mm with great results.
Specially in canada.Some how the gas is 94 oct......???
PFC and there is a tuner there that makes magic.
Try to contact the guys at dynamotorsports.ca
We recomend them

[TheyKilledKenny]

Im on my way to 350-400 hp with my RB22. Im just waiting to break in the rebuild some more, I only have about 2,500kms on it. Let me know what you think about my future plans, and if you think im overlooking something.

N1 Oil pump
Jun Oil collar
Engine block machined to 2.2L
Tomei 2.2 piston kit
Tomei Metal head gasket
Cylinder head machined true + Port and Polish
Tomei 260 degree Pro cams
Tomei Valve guides
Jun Valve springs
N1 Water pump
Power Enterises timing belt
NGK Spark plugs
Splitfire ignition coils
Tomei Fuel pressure regulator
Cusco Oil catch tank
OS Giken Super single clutch
Koyo Racing rad
HKS BOV
HKS Air Intake

FUTURE GOALS

HKS GT2530 turbo
Larger injectors
Nistune or maybe PFC
Z32 MAF
Oil Cooler
Adjustable cam gears
Front mount intercooler
Low heat themostat
High flow fuel pump
Larger intake manifold
Maybe a RB25 transmission swap with electronic speedo

[Zacho]

Gt2530 will not flow enough

[M13]

Gt2530 will not flow enough

yeah put a bigger turbo in that.

[TheyKilledKenny]

Gt2530 will not flow enough

yeah put a bigger turbo in that.

Ive heard that the 2530 is good for its response, I want to keep the turbo lag to a minimum. Could I pull off a Greddy TD06-20g or 25g? I wonder where in the powerband Id start seeing boost. The GTRS is bigger than the 2530, and cheaper than the td's, maybe thats my best bet.

[Zacho]

The tdxx series are probably not a great turbo to keep lag down. Old technology and non-ball bearing. For 400whp on an RB20 you will have to move a decent amount of air. The GTRS is a rather small frame turbo as well, it barely flows 35 lb/min. That is hardly an upgrade over stock it won't almost double the power of an rb20(or 2.2 in your case).

Let me put it to you this way. You can run a smaller turbo at a high boost and do everything you can to squeeze your power goal out of it and have a bit less lag. Or run something that can flow more, be able to run a lower boost and have some headroom for more power. If you want the best of both worlds get a billet wheel ball bearing turbo that is a larger frame than a gt28(i.e. gt30) or a borg warner s200sx.

Power/Lag have to make a compromise somewhere. You have a 2.2L engine.

[TheyKilledKenny]

Looks like Ill have to delve into this some more. I appreciate the input.

[falcon]

If you have to ask what you need, you can't do it.

Period.

[TheyKilledKenny]

If you have to ask what you need, you can't do it.

Period.

Someones jealous

[sullivanracing06]

S2 rb25det motor set
gt35r
msl h/g
head studs
z32 maf
255 intank
fmic
3" or larger turbo back
decent engine management

your set

if you push a 20 that power your going to be getting really good with swapping in new 20 boxes

[Skym]

Zacho is correct.

Another way you can do it, if just for dyno only, is run the HKS GTRS turbo and run engine on E85. With E85, tune, have noticed up to around 67rwhp gains. There's a 50rwhp gain on a RB20DET with 98/E85 mix. Dyno charts for 98/E85 mix, 98 only are in the SAU RB20DET dyno result thread.

This is a turbo calculator that can help select a rough turbo size to suit your application -

http://www.turbofast.com.au/TFmatch.html

Then it's your job to find out what A/R you need to get it to spool at what point in rpm's, i.e 4000rpm, 5000rpm.

TD06 turbo kit, Greedy cams, etc on refreshed stock RB20DET bottomend 370-400hp at engine -

http://www.youtube.com/watch?v=_1JlZNPI6MQ

TD06 turbo kit with stock RB20DET, stock cams, adjustable cam gears, 370hp at engine in videoclip -

http://www.youtube.com/watch?v=dkP33kxpHvw

Here's a 449.8HP (I assume at wheels) RB20DET -

http://www.youtube.com/watch?v=QKESFO0JGzY

Mods are mentioned in the comments, ported head, 290 duration, 11.6 or 12.4 mm`s lift Jun cams (I assume solid lifter), JUN intake manifold (I assume modified to fit RB20DET) Turbonetics T60-1 Stage 5 with 0.63A/R (I assume exhaust housing) at 1.45bar, Haltech E6X engine management. Full boost at around 3800-4000rpm and revs to 8750rpm on stock bottomend, very little amount of hp under 4000rpm according to owner.

The 2.2 litre might help gain that hp back.

[TheyKilledKenny]

I tried the turbo calculator and got these results:

Engine Cap 2200/Max RPM 9000/Turbo Boost 12
MAKE TYPE HP Rating TURBINE HSG A/R
Garrett GT25 440 0.8200000000000001

BHP 398.7081173484002 Air Flow lb per min 36.69709512074676

This calculator is saying the 25 series is my best bet, but I wont have the flow for my power goals and cam setup.

For response the GTRS is supposed to be a good fit for the RB20, perhaps with a 0.82 or maybe 1.06 A/R. For power maybe a 3037 with a 0.63 A/R and 3" dump is probably a good choice. Smaller A/R helps the turbo spool faster and larger trim with help with the flow.

So does the dyno with ethanol help give you rich tune when you switch back to 91? Thanks for the help fellas.

[Skym]

From what I understand, GT25 is the CHRA and name for size of turbo. Stock revlimiter is at 7600rpm. Capacity is 2200cc. Max compressor maps shows is usually around 30psi and is where I put it at on that calculator, which picks a GT30 turbo / CHRA, 0.82 A/R. On RB25DET a GT3076R with 0.82 A/R produces 400whp at something like 17psi. But I know from RB20DET in link below, that boost level to achieve close to 400whp is around 24psi and on that calculator it gives me a GT30 turbo / CHRA with 0.82 A/R (I assume GT3076R with 0.82 A/R exhaust housing).

If you plot boost max level onto compressor map, it shouldn't go off map on compressor map on right side or go near surge line on I think is left side. I assume that calculator picks turbo that stays within compressor map on right side when running highest boost level.

GT3076R on stock? RB20DET with 24psi, PowerFC with MAF, 555cc injectors, etc in Canada, close to 400whp (with MAP sensor or E85 gas, easily over 400whp) -

http://www.youtube.com/watch?v=X_mibuiFSuk

Thrashing above R32 on oval -

http://www.youtube.com/watch?v=ak1dJrSgJqo

Can buy a anti surge compressor cover for GT3076R turbo.

Ethonal is similar to tuning Methonal, where you need to add more fuel over what you would on pump gas. Neat part about Nistune is you can have both tunes on laptop, swap them over for dyno or road / low octane gas.

[TheyKilledKenny]

I found a good thread on SAU about turbo upgrades on the RB20:

http://www.skylinesaustralia.com/forums/Rb20-Turbo-Upgrade-Dyno-t103095.html&pid=1894685&mode=threaded#entry1894685

I really didnt know anything about turbos until a few days ago, so I have a lot to learn. Im going to do my research and make a educated decision. I appreciate your insight, and Ill keep it in mind as I move forward. Now I gotta figure out these dyno graphs

[Skym]

That's the thread I was talking about above. Last or second to last page in that thread should have the E85, 98 fuel dynocharts that I'm talking about above.

Note a boosted up stock GTS-R (RB20DET-R) has around 375rwhp. I think dynochart was on first or second page.

This is what a RB20DET drives like when fully modified for racing with around 375rwhp and 1.7bar (2 race wins out of 3 races) -

http://www.youtube.com/watch?v=BIasNcIrZcM

In the pits warming up -

http://www.youtube.com/watch?v=8_iHWWiVBXs