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

    • Nah. Was just wondering if you were having a small stroke or if there was some slur/gaf/inside joke that I wasn't aware of.
    • That was a fark up, it's Salamanca Place I was thinking of. And now I'm curious as to what potential slur/gaf I have caused with Salamander Road, ha ha!
    • Actually everyone on the roads was really well behaved. The only person that did any minor tailgating was a local hoon in a Turbo Focus. Unfortunately we weren't going the same way so there was no grand initial D touge battle. Lots of people pulled over and let me through. The amount of "Hey man nice car, omg skyline, nice 34 man woo" was suprising. Like really suprising. Like almost annoying. My partner was obviously surprised, she'd never seen anyone in the real world point out the car/like the car/want to chat about the car before, so to have like 3 people per day mention it was notable, I could finally say SEE? SOMEONE THINKS THEY'RE COOL. Everyone was also pretty suprised about the weather. Every day was dry and about ~13-14C. Mount Wellington had a sign that said they close the gates at 9pm and I was heading up there at about ~7:30. It was VERY apparent that conditions were getting significantly worse by the minute on the way up and down. The road on the mountain was terrible though, it's no driving road. I have various suspension related questions now. Luckily it was only about 20 minutes from where we were staying to the top of the mountain as said Google maps. We only had the 2 nights in Hobart. We went to the Farm Gate Market though which was really good - And went down to the Hastings Thermal springs/caves down there during the day. I'd definitely be up for going back again, so luckily there's a few more sights yet to see. Didn't get to do the west coast/queenstown/cradle mountain so this was supposed to be a 'scouting' trip anyway of sorts if I were to one day do/take part in/organize a more car-focused trip. As for the boat, it wasn't bad. Well it was bad, but not in the way you're thinking. We did the night trip which leaves at 6:45 (though you have to be there ~2 hours earlier) and arrives the next morning at about 6am. There is nothing to do on the ship. If you plan accordingly and bring a book/tablet/show to watch/charger you can just chill out, take some Travacalm and just sleep through it. The food there is an extremely basic buffet that costs $32 a plate, or $14 for a $3 pizza. The way back we had a travel kettle and a few different types of cup noodles and made our own tea/coffee in the room. This was a far superior way to do it. At the very least book one of the rooms with beds. I guess as we were in the off season we didn't have room mates. You get an option for rooms with 4 beds (2x bunks) or a room with just the two bottom beds. There's also some option for a deluxe queen bed but it's much pricer. We've been on sleeper trains in Asia before so we figured this is similar (and it was)
    • You just gotta be really, really, really clear and decisive with what you want your end product to be. 99% of people who want this conversion aren't "I want to run a 295 front tyre!" so they don't really need the widebody. They just want the OEM body to look a little less dumpy, so bonnet, bar, skirts job done with some camber, stretch, slam. It's when you want that, but then decide to pivot later you get big problems. See also if you're willing to get an all in one fibreglass bar, and you're willing to accept fibreglass problems like cracking the entire item on a driveway, instead of just a piece attached to the bottom, etc etc etc. Decide this all before buyin'.
×
×
  • Create New...