Jump to content
SAU Community

Recommended Posts

Hey guys

Currently making 415rwkw with a gtx3582 .82 rear housing on 27-28lb boost. What's the best way of getting close to or over 500kw? Would a bigger rear housing suffice ? If not what turbo is the next logical size up. Running a forged motor with all Nitto gear. Currently out of fuel system (single walbro 460lph) so couldn't push more , ill be adding two extra 044 fuel pumps into the mix

Edited by Gta51
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/
Share on other sites

Would the biggest size tomei poncams help boost it aswell? fairly sure I have stock cams in it atm.

Cars a street car so I want to stay away from nitro meth etc loll

Im thinking a 1.06 rear housing, cams, and abit more boost should get me close to that

Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7567193
Share on other sites

If you have a GTX35 and only making 400-420rwkw though @ 27-28psi you've kinda got a problem... Assuming you are on E85 as well.

Should be a bit more than that. A GT35 will do 400rwkw on E85 with that amount of boost. The GTX flows more air, it should be well past it and around 440rwkw or more.

Could be a restriction somewhere or something else entirely. I'd be working out what is wrong first before going for more power/part changing.

Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7567818
Share on other sites

But a 500kW turbo LS is a very much more "streetable" engine than a 500kW 2.5 L RB!!

It's funny when the "400-500rwkw" street guys get asked what MPH they run, quite often it's FAR lower than what it should be.

Proof is always in the pudding there :)

  • Like 1
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7567915
Share on other sites

So agree with nismoid.

I remember a long time ago when this wasn't the case.

Ahh the good old days when saying you had a fast car actually meant, ummm, you actually had a fast car.

Mph will always rule the roost.

So agree with nismoid.

I remember a long time ago when this wasn't the case.

Ahh the good old days when saying you had a fast car actually meant, ummm, you actually had a fast car.

Mph will always rule the roost.

most cars cant handle it... we have high 300 cars running 9-10 then 500kw cars running 10-12s lol.... MPH is no longer an accurate SOLE indicator

perfect example

  • Like 1
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7567977
Share on other sites

If you have a GTX35 and only making 400-420rwkw though @ 27-28psi you've kinda got a problem... Assuming you are on E85 as well.

Should be a bit more than that. A GT35 will do 400rwkw on E85 with that amount of boost. The GTX flows more air, it should be well past it and around 440rwkw or more.

Could be a restriction somewhere or something else entirely. I'd be working out what is wrong first before going for more power/part changing.

Stock cams and a single fuel pump limited me. Once I add another pump and cams I'll see that figure with a retune I'm fairly sure. I get what your saying though :)

Edited by Gta51
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7568060
Share on other sites

most cars cant handle it... we have high 300 cars running 9-10 then 500kw cars running 10-12s lol.... MPH is no longer an accurate SOLE indicator

perfect example

Yeah but in GTS-t / GT-R land - There are so many results it's pretty easy to work it out where a car should be (say +/- 3/4mph). Some cars are like 10mph down (some are up lol), that ain't a result of a car that can't handle the power. Generally from what I've seen, if you have less traction you end up with slightly higher MPH - big more bragging rights at the pub isn't necessarily a bad thing lol :)

Most R33 GTS-t owners with 300-340rwkw are around the ~127mph

R33 GT-Rs with 300-340rwkw get around the ~124mph, if it's a R32 you're a little higher as you weigh less and so on.

Of course it's never gonna be 100% accurate, but you can get in the ballpark. Same as when someone posts up their GT-R is making 370rwkw on -9s never got anymore than like 120mph... Result debunked, you didn't have 370rwkw! Not a chance.

Then there was a 450rwkw 33 GT-R recently in NSW I saw that I think was like 124/125mph. Even without doing a big launch, something ain't right, it should be over 130mph easy.. Either it didn't have the power on the night or someone was singing hey diddle diddle in the dyno room

  • Like 1
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7568089
Share on other sites

Stock cams and a single fuel pump limited me. Once I add another pump and cams I'll see that figure with a retune I'm fairly sure. I get what your saying though :)

I had a big post for ya and my internet died lol. Poop.

Anyway I think fix the fuel pump and then see? It's pretty easy to do... IMO you should've run outta fuel before you got to 28psi. That's a LOT of pressure/flow needed outta the pump. Guys here on PULP have made ~370rwkw with a GT35 and stock RB25 head (around the 22psi marker). Then to get the 400 E85 and a bit more boost, and that's a smaller huffer and you really are running some good boost.

I mean look it might be nothing, or maybe you'll find 30rwkw easy just getting the fuel it needs? Even something simple like dropping the exhaust at the dump/cat you might just pick up 30rwkw. Sometimes even with a little restriction a set-up can still perform very well, just not perfectly type thing.

Obviously with head/cams etc you will potentially make more but something currently just doesn't sound right if you know what I mean? I'd be sorting the bits around it and checking a couple things first if you haven't already

Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7568097
Share on other sites

most cars cant handle it... we have high 300 cars running 9-10 then 500kw cars running 10-12s lol.... MPH is no longer an accurate SOLE indicator

perfect example

https://youtu.be/Po10g8VGKTI

ETs have always indicated setup, MPH have always indicated power

Nothing has changed.

Dynos lie, MPH don't.

  • Like 1
Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7568099
Share on other sites

I had a big post for ya and my internet died lol. Poop.

Anyway I think fix the fuel pump and then see? It's pretty easy to do... IMO you should've run outta fuel before you got to 28psi. That's a LOT of pressure/flow needed outta the pump. Guys here on PULP have made ~370rwkw with a GT35 and stock RB25 head (around the 22psi marker). Then to get the 400 E85 and a bit more boost, and that's a smaller huffer and you really are running some good boost.

I mean look it might be nothing, or maybe you'll find 30rwkw easy just getting the fuel it needs? Even something simple like dropping the exhaust at the dump/cat you might just pick up 30rwkw. Sometimes even with a little restriction a set-up can still perform very well, just not perfectly type thing.

Obviously with head/cams etc you will potentially make more but something currently just doesn't sound right if you know what I mean? I'd be sorting the bits around it and checking a couple things first if you haven't already

Spot on fuel pump was the biggest limiting factor for me. So I'm going to add another Walbro or two 044 pumps. Might aswell add cams since I'm getting retuned, always wanted to do that anyway

Link to comment
https://www.sau.com.au/forums/topic/458183-500kw-rb25det/#findComment-7568108
Share on other sites

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

    • Yeah, the latter. No diff should have a centre replaced without checking clearances because its unlikely to be the same as whatever came out. Not that that stops most people just checking a new centre in
    • Major thread necro but how bad of a job is it to DIY? Looking at it online it looks like if you reuse your ring and pinion as long as those are in good condition it should be fine to just pull the axles/front cover and replace the diff that way? Or should I be replacing everything and doing preload measurements/gear mesh testing like the factory service manual mentions for the rear diff?
    • in my list I had the R33 GTR as the best Skyline. Infact I had all GTR's (33>34=32), the NSX, the GTO, the 300ZX, the 180SX, the S15 better than the FD RX7. I had the MR2 and the A80 as 'just' better. I also think the DC5R Integra looks better but this is an 01 onwards car. I also think the FC>FD. It's almost like aesthetics are individual! The elements @GTSBoy likes about the FD and dislikes about the 180 are inverse in my eyes. I hate the rear end of the FD and it's weird tail lights that are bulbous and remind me of early hyundai excels. They are not striking, nor iconic, nor retro cool. The GTO has supercar proportions. I maintain these look much better in person (like the NSX) especially with nice wheels and suspension which is mandatory for all cars pretty much. Some (or all) of these you have to see in person to appreciate. You can't write a car off until you see one in the flesh IMO. Like most people we probably just like/dislike cars which represent certain eras of design or design styles in general. I also think the 60's Jag E type looks HORRIBLE, literally disgusting, and the 2000GT is nothing to write home about. FWIW I don't think the Dodge Viper Gen1's have aged very well either. You can probably see where I rate bubbly coupes like the FD. I know we're straying now but the C4 and C5 absolutely murder the Viper in the looks department as time goes on, for my eyes. Wouldn't surprise me if people who love the FD, also love the MX5, Dodge Viper, Jag E Type, etc etc.
    • I used to hate R31s, and any of the other Nissans that led up to it, and any of the Toyotas with similar styling, because of the boxiness. They were, and remain, childish, simplistic, and generally awful. I appreciate R31s a lot more now, but only the JDM 2 door. The ADM 4 door (and any other 4 door, even if they are unique compared to our local one) can eat a bowl of dicks. The Aussie R31 is also forever tarnished by their association with stereotypical bong clutching Aussie R31 owners of the 90s and early 2000s. I think the Nissans of the 70s (other than 120Y/180B/200B) are far superior looking to the 80s cars. The 240K era Skylines are boss. The same is broadly true of Toyotas. Hondas don't ever register in my thinking, from any era. Mitsus are all horrid shitboxen in any era, and so also don't register. Subarus are always awful, ditto. Daihatsus and Suzukis also don't generally register. They are all invisible. I think the SW20 MR2 looks fiddly. The 3000GT/GTO is like that but way worse. Too many silly plastic barnacles and fiddly gimmicks ruined what could have been a really nice base shape. Kinda-sorta looks like a big heavy ST165 Celica coupe (and I'm not sure if that's a good thing or a bad thing). I think the 180SX is dreadfully bland. It's not bad looking. But it has no excitement to it at all. It's just a liftback coupe thing with no interest in its lines, and bad graphical elements (ie wide expanses of taillight plastic on the rear garnish). The S13 Silvia is a little better - getting closer to R32 shapes. But still....bland. S14? Nope. Don't love it. S15...a little better. Probably a lot better, actually. Benefits from not being like a shrunk in the wash R34 (where the S13 was a shrunk in the wash R32 and the S14 looked like a Pulsar or something else from the stable on Nissan mid 90s horrors). The Z32 was hot as f**k when it came out but hasn't aged as well as the A80. Keep in mind that I think the R33 is the most disgusting looking thing - and out of all the previous cars mentioned is objectively closest to my precious R32. It's just....real bad, almost everywhere you look. And that is down to the majority of what was designed in the 90s being shit. All Nissans from that era look like shit. Most other brands ditto. In that context, the FD absolutely stands out as being by far the best looking car, for reasons already discussed. Going behind the aesthetics, the suspension alone makes it better than almost any other car.  
    • If they just called it the "Mazda Tiffany", it would have been spot on.
×
×
  • Create New...