Jump to content
SAU Community

Recommended Posts

Just noticed there's a RB20 (I gather RB24) in the Top RB20 Club making similar power figure

(367rwkw) with cams + HKS TO4ZR turbo at 23psi (post #1602) -

http://www.skylinesaustralia.com/forums/To...&start=1600

Edited by SKYPER
  • Replies 50
  • Created
  • Last Reply

Top Posters In This Topic

Im interested to know what sized rear housing and wheel is on the rear of a t04z, surely its not 1.6 like a few t04z's. We recently experimented with a mates RB20 with forgies and all sorts and made 291rwkw on 16psi with a gt3540 with a 1.06 rear. However out boost curve is identical to the power curve and never levels out...LOL! however this 20 made 30psi quickly and leveled out. Any insite jeff as to what could cause such a gradual boost curve? Got cams n all.

Edited by Ryanrb25
Just noticed there's a RB20 (I gather RB24) in the Top RB20 Club making similar power figure

(367rwkw) with cams + HKS TO4ZR turbo at 23psi (post #1602) -

http://www.skylinesaustralia.com/forums/To...&start=1600

Yeah i noticed that too, the extra capacity of the rb24 and big cams really help. You can see how we run much more boost for the same power but i am honestly surprised that a totally stock rb20 head can flow as much as it does with standard cams. The ports and valves are pretty small.

I think it is cool that both these engines are running on remapped standard ecu. :)

Im interested to know what sized rear housing and wheel is on the rear of a t04z, surely its not 1.6 like a few t04z's. We recently experimented with a mates RB20 with forgies and all sorts and made 291rwkw on 16psi with a gt3540 with a 1.06 rear. However out boost curve is identical to the power curve and never levels out...LOL! however this 20 made 30psi quickly and leveled out. Any insite jeff as to what could cause such a gradual boost curve? Got cams n all.

Hi Ryan, the turbo is actually a GT4094R - garrett 751470-20

If you are having problems with lazy spooling the things to look for would be exhaust manifold leaks, wastegate leaking, cam timing.

Yeah i noticed that too, the extra capacity of the rb24 and big cams really help. You can see how we run much more boost for the same power but i am honestly surprised that a totally stock rb20 head can flow as much as it does with standard cams. The ports and valves are pretty small.

I think it is cool that both these engines are running on remapped standard ecu. :)

Hi Ryan, the turbo is actually a GT4094R - garrett 751470-20

If you are having problems with lazy spooling the things to look for would be exhaust manifold leaks, wastegate leaking, cam timing.

yea thanks jeff, its got a pair of jun cams and cam gears, full rebuild with aries pistons, we tuned it ourselves with a microtech ltx12s, i think its just the nature of the turbo and 20 combination....goes like an animal nonetheless, cheers for your advice. we'll tinker a little bit more.

by the looks of things its around 160km/h so around 3800-4000rpm depending on the ratio. Keeping in mind, depending on what bleeder/controller you are using boost will be a bit flatter if it isn't so high because the actuator will start to open sooner with lower boost. Only slightly tho.

Thats some pretty sik numbers Jeff, (around 500hp) good effort.

That magical 400kw figure doesn't seem too far away with a decent cam profile.

I noticed you've decreased spring travel to increase the rate & seat pressure, as long as there is no chance of binding & room for more lift I can't see why you wouldn't get even more impressive numbers.

We must hook up as discussed a few weeks ago when I get back from QLD, cheers.

PS: As others have already stated here, it sounds like you'll get a better reception here as opposed to ns.com

  • 1 month later...

Sorry to dig up an old thread i was just after some info on the re shimmed stock valve springs if anyone can enlighten me???

I have HKS 264 cams (cant remember the lift) to go into my RB20 and wasn't keen on upgrading the valve springs if i didn't have to :thumbsup:

Just wondering who it was that shimmed them, whats involved and roughly how much it cost???

Cheers Ben

mate seems like turbo tune ain't change much since back in 05/06 they overtuned my engine which almost went bang, before i ripped it out and put a new one in then took it blackwood dyno got a tune from them sudden;y more power better response and it didn't wanna go bang anymore,

then they told me wasn't us it was u!!!

for the 1500 bucks i spent on rb25det including buying and installing and tuning (only 40,000ks on engine) i didn't bother trying to chase it up legally would have cost me to much then

thats my glowing recommendation for turbo tune love ya!!

mate seems like turbo tune ain't change much since back in 05/06 they overtuned my engine which almost went bang, before i ripped it out and put a new one in then took it blackwood dyno got a tune from them sudden;y more power better response and it didn't wanna go bang anymore,

then they told me wasn't us it was u!!!

for the 1500 bucks i spent on rb25det including buying and installing and tuning (only 40,000ks on engine) i didn't bother trying to chase it up legally would have cost me to much then

thats my glowing recommendation for turbo tune love ya!!

dude, im not saying your wrong or right etc.... i just want to clarify the rb20 that they have built was a lazy engine that was replaced my a fresh one out of a customers car, which had been laying around, they put it in an s14 shell, used a whole heap of parts laying around and FOR A LAUGH tried to find the limits of the motor, It was over a few beers, a few mates and a few laughs after hours and im pretty sure they intended to blow it up, It was by no means an example of what they'd deliver to a customer in any way...

whats the highest safe amount of boost to run with a stock rb25?

do a search man, i personally wouldn't run any more than 17-18psi which a thicker headgasket.

Ryan... the soloution for chris's car is simple.....

Nitrous. And Lots of it. :blush::D

I am also intending running 1.1 - 1.2 bar with stock head gasket.... not pushing the same power as you though Simon. :thumbsup:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • would a r34 gtr hood line up with gt/gtt stock fenders? after latch, front bumper and hinges are swapped for gtr ones? or would the fenders be too low or high in relation to the hood surface? ( I believe seeing somewhere that gtr front fenders use some type of riser for the sides, but do not know how that relates to stock gt/gtt fenders.)    
    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
×
×
  • Create New...