Turbz RB-25

Were you a little warrped last night were ya?

Hi guys, So do I need this: https://www.whiteline.com.au/store/default.asp?part=KCA348 or this; in order to fix my inner rear tyre wear when my car squats down from the torque: https://www.whiteline.com.au/store/default.asp?part=KCA331 Sorry about all the questions but I seriously don't know what to get, I'm stupid when it comes to suspension. Cheers

Can you get something other than those spherical bushes? they dont sound too good, you mentioned in a post that they feel horrible and hard and that they wear out very quickly.(how quickly, months, weeks?) Is there an alternative?

Hi Gary, Thanks for tyring to explain all this stuff but I'm still finding alot of words too technical. Could you please tell me in simple terms what I need, shocks, camber kit etc to stop this inside rear tyre wear and get maximum traction when I plant my foot on the floor. and also, the price for install (genreally how many hours would it take to install?) Do I need: New springs New shocks Camber kit? Many thanks for your help.

Hi guys, I've done alot of reading using the search button but I don't really understand what many people are talking about. Ok, firstly, I am getting alot of inside tyre wear on the rear wheels. My car is not lowered (much) on the back, by that I mean there is still about 2.5 inchs from the rear tyres and the guard. With that being said, I understand that the inside of my tyres wear out when I plant my foot on the accelorator and my car sqauts. I have taken my car to the shop to get my HKS GT2835 Pro S fitted, and when it comes out, the car is going to squat even more and the wear will only occur faster. Now, I understand that I have two options available, bushes and upper arms? Could someone please explain to me the difference between the two in simple terms, I'm still a noob. I understand that upper arms arm more expensive and have more room for adjustment. If I understood correctly, bushes are cheaper, dont have much adjustment and wear out or something?? Does that mean you have to keep replacing them after a while because they wear out? Do I go for bushes or adjustable arms? and could the gurus out there point out the exact differences and the cost differences including installation? What's more suitable for my application since my car isn't that low? I am more into straight line racing rather then track. I don't race my car ever on a track, I just give it the occasional hit on the road on a straight line. Even now with 194 rwkw, it doesn't get any traction in 1st when it hits boost, and when I shift into second. I can't imagine what it will be like with 260rwkw! As I don't really understand the echnical terms, could someone please take the time to explain this to m and what I need for my style of driving? I want to be able to get all the tyre on the road when accelerating, not just the inner 15%. However, if I do through in more positive camber, does this mean the outside of my tyres will wear faster then my inside? sorry for all the questions guys.... still learning... cheerio

WTF are you on about....? I have no idea what you just meant..

What's the best 235 45 17 tyre for under 200? I know that they don't make toyo TP-G anymore. Cheers

a pic would be great! Cheers

will 235 give me enough traction for 260 rwkw?

Hi guys, I got R34 GTS-T rims on my R33 GTS-T. I am looking for new tyres to handle my power (260rwkw) Does anyone know they size of the rim? obviously they are 17", but how think are they? are they 8 inch? Also, what's the thickest tyre I could place on them without compramising crap handling, (Tyre beeing too wide for the wheel)? 235? 245? Cheers

Hi guys, Since I have a series 1 front bar, there is alot of the front bar blocking the cold air hitting the intercooler. I did a quick photo shop of what I want to do. I will make it all neat ofcourse with fibreglass etc etc, but I was just wondering what you guys think, will it help in terms of performance? I don't really give two sh!ts about the looks, I'd prefer to keep it looking standard providing that it doesn't hinder my performance? As you can see it covers about 50% of my intercooler, which I think is alot. So, will I get better performance by doing what I have detailed in the pics attached? Cheers

Hi guys, I spoke to sl33py about this, and he said I should be getting at least 260 rwkw with the following mods at 18PSI: 3.5 inch straight through exhaust GReddy Front Mount Cooler Splitfire coil packs Pod with customs cold air intake and heat shield Bosch 044 Fuel pump Z32 AFM HKS GT2835 Pro S Nismo 555cc injectors Power FC S.K, I am interested in your opinion. Do you think I should hit 260rwkw at 18PSI on a safe tune? And in your opinion, will this power be safe with my stock engine/internals? Cheers

Damn good explanation. I think you just threw me off a little when you said 'I personally think that boost has nothing to do with horsepower'. In the post above you admitted it does. I understand now that you can get more power by lessening restrictions and lowering boost at the same time, but boost still does increase power. Thanks for taking the time to explain the above to me!

Please do explain this to me further. I was under the impression that boost (PSI) is the amount of pressure the turbo is producing and sending to the engine? Correct me if I'm wrong, please, I would love to learn more. So your saying that a tune, cams and other supporting mods, would produce more power gain compared to winding up the boost from 10 PSI to 20 PSI?

Of course horsepower is dependant on the car setup, and this was acknowledged before making the table (refer to first post- use ONLY as a rough guide as each car is different i.e different computer setup, different exhaust setup, some have cams, some don't, different tune etc etc etc) Surely this is not to say however that more boost doesn't increase horsepower???

.... Is that a joke? Correct me if I'm wrong, but doesn't winding up the boost, thus, increase air flow the turbo produces, increase your horsepower??

And 'YGPM' means...??

Well, it is too high to include in the data set, he's the only one who's obtained over 300 rwkw (with the GT-RS), thus, being an outlier. That is why I'm not going to include it in the data because it will distort it.

280 RWKW! Mate, I'm hoping for 260rwkw at 18 PSI. If I get anything above 260rwkw I'd be over the moon!! So what boost are you going to run with your GT-RS, 17-18? 18 PSI should get my turbo going good, shouldn't it? In your opinion sl33py, what's the safe threashold for standard RB-25 internals? Some people said 250 rwkw, others say 300 rwkw, big difference if you ask me?

Hey mate, The graph I posted isn't progressive. By that I mean, the graph doesn't represent the build up of boost as the turbo spools up. The graph represents boost vs power, with the boost remaining constant (i.e being set to a specific PSI) The graph has nothing to do with how fast the turbo spools. So when you say 'RE the graph you just pasted. I think it's because you have to wait until more air is being moved by the engine before the larger turbine wheel of the 2835 starts spinning, whereas the GTRS has less to spin up (less lag).', I wasn't refering to spool time at all, I was refering to max power output at a defined pressure. Do you understand what I mean? I think we are getting mixed up here with to different concepts, one being that the GT-RS will produce more power at earlier rpm than the GT2835 (what you're talking about, I think?) and secondly, max power output for a defined PSI (what I am talking about). Nonetheless, the analysis I've done is better than nothing at all, and people can still use it as a ROUGH guide as to what power output they would acheive. As for outliers in the data set, I've already removed them. For example, someone got 234 RWKW at 17 PSI using the GT2835. Way too low in My opinion, something must have been wrong. And another one where some guys acheived 300 RWKW using the GT-RS. (way too high) The data may be inaccurate however because people have different mods (ie. computer, intercooler, exhaust etc etc), and also that the data set may be too small. Nonetheless, I have my fingers crossed when I install my GT2835 on monday.... Cheers

Hi guys, Did the analysis for the GCG High-Flow turbo. Doesn't even compare to the GT-RS and the HKS GT2835 Pro S in terms of output. Nonetheless, for the money, still produces VERY good results. Cheers lads!

Here is the regression analysis output figures for the HKS GT2835 Pro S I don't understand why it would produce less power than the GT-RS???

Wouldn't the GT2835 still produce more power than the GT-RS regardless of the PSI run (providing that both turbos run equal PSI) merely because it has a larger compresser wheel?? By that I mean, if both the GT-RS and the GT2835 pro s ran 12 PSI, the GT2835 would produce more power as it has a bigger compresser wheel, thus, pushing more air?

I don't really understand what you're trying to say? What I meant was, for example at 18 PSI, the car with the GT-RS Turbo put out more power than the car with a GT2835 Pro S Turbo (according to my regression analysis). Now, I'm pretty cut as I recently purchased a GT2835 Pro S. So are you trying to say that if you wound the boost up to like 22 PSI that the GT2835 would overtake the GT-RS in terms of power output, but at low boost levels, such as 14 PSI that the GT-RS would be better suited? Cheers

Yeah, that's why I wrote in the first post not to use the table as a definate determinant since indavidual cars are different (i.e different intercooler, different computer, different fuel pump etc etc) Nonetheless, you are still able to use it as a rough guide as to how much power it'll put out. Suprisingly, I performed the same analysis on the HKS GT2835 Pro S and the power turned out to be less than the GT-RS at the same PSI.... Strange........ You'd think it would be more?? Anyways, enjoy! Cheers