New Turbo Setup

[75coupe]

Im starting to not understand...

why did you get a 3582 if your only going to run low boost, it wont be operating at its best efficiency....

why not just get a smaller turbo and boost it to its feel good zone... you'll have better response...

or is this just a temporary thing?

if its temporary I dont understand this either, the pain of tuning, reconfiguring setup, and adjusting things to suit is something I think I most would prefer to do once if at all possible...

or you can put the 3582 on and my smaller turbo (2835) will complete three quarter miles while your waiting for boost to kick in... lol...

[Room42]

Im starting to not understand...

why did you get a 3582 if your only going to run low boost, it wont be operating at its best efficiency....

why not just get a smaller turbo and boost it to its feel good zone... you'll have better response...

or is this just a temporary thing?

if its temporary I dont understand this either, the pain of tuning, reconfiguring setup, and adjusting things to suit is something I think I most would prefer to do once if at all possible...

or you can put the 3582 on and my smaller turbo (2835) will complete three quarter miles while your waiting for boost to kick in... lol...

If you didn't read from the start then you should. If you did then I'll clarify a few key points. In order, I'm running low boost (18 psi or so) because it is going on a 170xxx k rb25det engine. I would have got a smaller turbo but then I would just have to buy a bigger one soon so I got the one I want. On the subject of temporary, I have an rb30 in the shed almost ready to put in. Thats like the 50th time I've said that lol. I'm stroking it in less than a year. Its getting put in my car...with the gt3582r on it. I want a bigger turbo now as 190 rwkw is nowhere near enough for me. I like tuning. I almost love it. I adjust for fun. I am doing it once just not overnight cos I haven't won the lotto yet. Try putting your smaller turbo on a rb2530 and see how well it goes or better yet put it on a forged rb34. As far as lag goes its not a concern for me. I'm used to old school 2 stroke motorbikes. Try them out for lag. I know my car is fast so I don't have to race between lights to prove it. Its a manual so lag is only a gearchange from disappearing. In your honest opinion who's car will be quicker down the quarter only comparing turbo's? And back to the start again, it will be running in its best efficiency zone. Just not yet.

[75coupe]

Oh I read the start but I still dont understand...

if I put my turbo on a 2530 (forged 34 makes zero difference?) it would be killer response and choked up top, most people would say response and area under the curve is where its at....

But you cant just compare turbos when talking down the straight... I reckon you'll be waiting for boost to kick in before I do and by that time the race is over....

why dont you just wait for the new engine and then put the 3582 setup together...?

Id rather 190rwkw with std response over 3582 lagggggg....

is this a street car or track only car...???

[Room42]

Oh I read the start but I still dont understand...

if I put my turbo on a 2530 (forged 34 makes zero difference?) it would be killer response and choked up top, most people would say response and area under the curve is where its at....

But you cant just compare turbos when talking down the straight... I reckon you'll be waiting for boost to kick in before I do and by that time the race is over....

why dont you just wait for the new engine and then put the 3582 setup together...?

Id rather 190rwkw with std response over 3582 lagggggg....

is this a street car or track only car...???

If you want killer response then you need displacement and more cylinders and keep it na so you have the legs. If you think a forged 34 wont make a difference (wouldnt have said it to you but you said it first) then you need to read up a bit more. If we were racing then I'd use antilag or I'd have an auto and hold it on the transbrake. But were not. I agree somewhat with the 190rwkw statement. That would mean buying an extra turbo cos the stock one's die quickly. I dont want to spend 1500 on a turbo now and then do it again in 12 months. It is my daily driver. It gets cruised on the weekend and also gets a hiding from time to time (half the time )

[75coupe]

killer response comes with a small turbo, said nothing about having legs....

forged 34 or std 34 wont make any difference to how a turbo spools up.

stock turbos last ages if you service your car well.... do a search some people have them on cars over 200,000Ks old

but you dont have anti-lag or transbraked auto do you, you have a laggy turbo on a small breathing setup... yes yes for the time being...

I understand now that its a temporary setup... I just dont agree with your thinking...

Did you end up getting your questions answered???

[NYTSKY]

I just dont agree with your thinking...

Makes 2 of us.

[Room42]

Whatever makes you happy then aye Just out of interest did either of you blokes have something positive to add or did you just feel like having a go?

[75coupe]

I think we noticed there was a floor to your setup and could maybe make you aware of your downfall before it cost you time and money...

As long as your happy with your choices at the end of the day...

Some of us just make different choices with our own reasoning I guess...

[AngryRB]

i dont understand why a gt35 wont hammer on a rb25, can someone enlighten me? cause ive seen them on utube and they absolutely have balls , and why isnt 18psi in there efficiency zone or close enough to it?

from reading the thread its a tempory setup by a guy that likes to tinker with his beast, whats so wrong with that?

[NYTSKY]

They do hammer, i made 430rwkw with mine. However that was with a motor and mods to handle it.

A 35R making 250rwkw is going to be laggy.

A 35R making 450rwkw is an absolute response monster.

[Room42]

i dont understand why a gt35 wont hammer on a rb25, can someone enlighten me? cause ive seen them on utube and they absolutely have balls , and why isnt 18psi in there efficiency zone or close enough to it?

from reading the thread its a tempory setup by a guy that likes to tinker with his beast, whats so wrong with that?

It will hammer mate. You and I both know it. I'll make another clip after its on the car. And yep I'm doing up my car. A bit at a time. More parts will come later. Its not a track car so it wont break (fingers crossed). Nothing wrong with that aye

Have a sus of this clip. It is 430 rwhp at 18 psi...http://www.youtube.com/watch?v=bTsYbu66NUk&feature=related...

[Adriano]

As far as ive seen 18 psi is enough to kill a stock rb25, so i hope you arent expecting it to last a year. I made 316rwkw@16 psi on a stock motor with a .63ex.

[Room42]

Guys, seriously, it's a daily driver. I'm not 20 and stupid like 20-something year olds are. She'll be right. If it does blow up then I'll just stroke it earlier than I planned.

[Room42]

I think we noticed there was a floor to your setup and could maybe make you aware of your downfall before it cost you time and money...

As long as your happy with your choices at the end of the day...

Some of us just make different choices with our own reasoning I guess...

Check out #743 in the rb25 dyno thread. Floor and downfall???

[Hanaldo]

Guys, seriously, it's a daily driver. I'm not 20 and stupid like 20-something year olds are. She'll be right. If it does blow up then I'll just stroke it earlier than I planned.

I am offended.

[Room42]

Sorry if I offended you Hanaldo. It wasn't aimed at you. It was more for the haters that seem to think they know everything and that I'm doomed to failure.

[Rolls]

Personally if you are going to wait a year and change the motor I would just slap a highflowed 25 turbo on there for now, hypergear do some very nice units for just over a grand, that way you can keep everything stock and get similar power with stock spool and bugger all lag. You are going to be pushing what maybe 280kw with this setup at that boost? It will be very laggy imo.

I would honestly keep the turbo on the shelf until your 3L is done and you can run the turbo to its max, it will be painful to drive for the year on low boost. High flow will be much more fun and you can easily sell it when you are finished.

That is what I would do anyway.

There is no way in hell I would run a 3" afm in the intake of a 4" front GT3582R!!

Has anyone done a back to back to see how much of a restriction it does cause?

As far as ive seen 18 psi is enough to kill a stock rb25, so i hope you arent expecting it to last a year. I made 316rwkw@16 psi on a stock motor with a .63ex.

If it is tuned correctly and never sees detonating or oil starvation (drifting etc) then it should last much longer than a year, just keep the revs under 7500.

Edited August 22, 2011 by Rolls

[Room42]

Hey Rolls I've been speaking to a guy on here who has a very similar setup to what I will have. Reckons he sees 23 psi at 4800 and makes about 420 rhwp. This was done on a stainless manifold, not sure what brand. Has run his motor like this for 2 years as well as running it at 26 psi for a dyno day to pull 470 rwhp. I'm getting a 6boost manifold and with my deadly tuning and the manifold I reckon I can get it to spool up a fair bit earlier. A electronic boost controller might help things a bit. I'll certainly try it at 20something psi. Also I was thinking that I might just chuck in the rb30 with the untouched bottom end and take it easy for a while. At least it will improve the spool up time a bit. I'll only do that if the 25 sucks too much. I seriously thought about getting a high flow for the next year but I really only wanted to buy one turbo so this is the one I'm stuck with.

On the subject of tuning with the new turbo, I'll make sure that it doesn't knock. Lol I'm not going to just assemble it and go out and floor it, tho it would be cool. I'll just sus out the load lines carefully a bit at a time till I'm sure that it will be ok. So far it hasn't seen past load 16. I have put a tune through the whole map (fuel and ignition) but haven't used it all yet so I'll see how it goes.

I use motul oil and it never gets held at wot for long. I generally don't go sideways cos I'm on public roads so the oil will be staying where it should. Most of the time I only rev it to 6600 cos the power drops off at 6950 anyway with the standard turbo. I'll up my limiter to 7600 from 7000 so it doesn't hit it anymore when the new turbo is on, also giving me a bit more legs.

I'm going to get it back on the dyno for a check after I tune it and I'll try the afm where it is and in the cooler piping to have a sus. You can be sure that I will post results, pics and a couple of youtube clips once its done

[Rolls]

4800rpm is massive lag, transient response will suck as well, being as you will have to limit it to 7500rpm for reliability that is only a ~2k power band. Just have a look at some videos on youtube to see how laggy it is.

Highly recommend a small highflow until you get everything ready.

Edited August 22, 2011 by Rolls

[75coupe]

4800rpm is massive lag, transient response will suck as well, being as you will have to limit it to 7500rpm for reliability that is only a ~2k power band. Just have a look at some videos on youtube to see how laggy it is.

Highly recommend a small highflow until you get everything ready.

what, could it be that others think your temporary setup will be laggy as well...

seriously a $250 std turbo will be nicer to drive on this temporary setup rather than the 35r... save the new turbo for the new bottom end and it will be a nicer install, feel nicer and the car will still have its nice response in the meantime...

if you think 4800rpm is not lagged then, continue on your own way...