Rb 25 Turbo Choices

[Lithium]

red = bp ultimate (98 RON)

blue = powerplus e85 (106 RON)

Nice. Hits 17psi at the same kind of rpm as Bri73y's HTA GT3076R did on E85 on his run in tune

will it do a 10 second 1/4 mile?

Maybe we should try and peer pressure Bri73y into doing a 1/4 mile run when he has his full tune done on his car and see how it goes. I never claimed a car with one would be a 10 second car, but I reckon with the right setup it would be possible.

[ARTZ]

also depends where you get your freddy but there are some reputable sellers and then there is the other guys...

I sold mine to battery who bolted it straight on and hasn't had an issue, so don't belive the hype

Haha ouch! I handed it to Plazmaman thankyou very much

[joeyjoejoejuniorshabadoo]

Nice. Hits 17psi at the same kind of rpm as Bri73y's HTA GT3076R did on E85 on his run in tune

3200? :0

[34GeeTeeTee]

3200? :0

Check the link i posted before, there is a graph!

[joeyjoejoejuniorshabadoo]

that graph does not show 17psi by the same revs... no idea what lithium is smokin?

[Lithium]

3200? :0

Edit - argh its been ages since I looked at it, I thought it was 17psi by around 3400rpm, my bad.

Looking at it, it looks like you both reach 13psi by around 3300rpm on E85 (comparing fuel for fuel). After that point it is hard to compare, partly due to dyno scale and partly as his looks like it has a lazier boost control setup which is totally unrelated to the turbo itself so after that point the boost climb tapers off. If the boost kept climbing like it was, it looks like it is on a similar kind of mission - the GT2835 might have a tiny little edge over it, but comparing with a turbo which is flow wise a much better match to the engine and capable of 100+whp more I think it's a pretty respectable thing.

I never said it was exactly the same, when you are talking 100rpm or so it is hardly going to be worlds apart - and that is more the point I was trying to make.

[joeyjoejoejuniorshabadoo]

Fair point... Although with more tuning we did get the e85 boost up to pretty much where the pulp was

Also looks like the boost isn't properly sorted on that run in tune so there might be more in it response wise?

[34GeeTeeTee]

Fair point... Although with more tuning we did get the e85 boost up to pretty much where the pulp was

Also looks like the boost isn't properly sorted on that run in tune so there might be more in it response wise?

When i first saw it i was surprised! Will be good too see how the car turns out! Interesting that is for sure!

[JZP]

You get what you pay for

Geez!

I DID buy from a reputable sponsor of this forum! Only through research and quite a bit of homework did i learn of this need.

... try provide some friendly advice ....

[Joshbigt62r]

Haha don't take it to heart bro everyone has a crack at everyone on here lol. No big deal. Plazmaman is the way to go anyway. And after looking at my receipt my plazmaman throttle is 66mm the smallest. If someone ever buys my 2535 HKS I'll be putting on roys greddy t67 or a FP 3076.

Edited May 14, 2013 by Joshbigt62r

[ARTZ]

why is plazmaman the way to go, because its uber expensive?

I might as well say that the stock plenum is the way to go, it does the same job and costs nothing....

[Joshbigt62r]

Obviously because I own one haha kidding.

Realistically there's F all difference between them. Just what looks you prefer I guess. People say the longer factory runners are better but a mate of mine sold his plazmaman and went Freddy for basically zilch difference. I'll see if he can russle up the dyno sheets for me to put up He doesn't go on here anymore.

Edited May 14, 2013 by Joshbigt62r

[joeyjoejoejuniorshabadoo]

If you don't care about looks (and why should you) most definitely stock until about 350 odd rwkw

[ARTZ]

i think Staos pushed over 400 through his....

[Lithium]

Fair point... Although with more tuning we did get the e85 boost up to pretty much where the pulp was

Also looks like the boost isn't properly sorted on that run in tune so there might be more in it response wise?

Ah ok, nice I had considered getting one of those at one point as they seemed like they'd be really nice but for me they seemed just slightly on the smaller side for my liking - but still really good. Much prefer the idea of them to GT-RS!

The overall tune in that plot is just a run in tune so I'd not take it as anything more than a loose indication of where things were going to be heading - I really reckon those things + RB25DETs would be a match made in heaven. At least by my tastes

[hypergear]

i think Staos pushed over 400 through his....

At 431rwkws on stock inlet manifold held it fine, I don't think it has issues crunch 460rwkws either, not sure at exactly what power level larger inlet manifold and throttle body starts to take effects. The positive side of those forward facing plenums would be the ability to adapt on shorter cooler pippings instead of having them looping around the rocker cover.

The boost behavior seems to be common to the x28x type of turbine wheels even with customized larger turbine exducer trim. it really needs to have taller inducers and larger dia to be efficient enough for the RB25det motor.

[joeyjoejoejuniorshabadoo]

Ah ok, nice I had considered getting one of those at one point as they seemed like they'd be really nice but for me they seemed just slightly on the smaller side for my liking - but still really good. Much prefer the idea of them to GT-RS!

The overall tune in that plot is just a run in tune so I'd not take it as anything more than a loose indication of where things were going to be heading - I really reckon those things + RB25DETs would be a match made in heaven. At least by my tastes

if it can match the 2835 for response, or even come within 500 rpm it will be an amazing bit of kit

The boost behavior seems to be common to the x28x type of turbine wheels even with customized larger turbine exducer trim. it really needs to have taller inducers and larger dia to be efficient enough for the RB25det motor.

if you are referring to the HKS turbo, dont forget it's a modified 30xx not a 28xx and HKS just didn't update their names with garrett

[Lithium]

if it can match the 2835 for response, or even come within 500 rpm it will be an amazing bit of kit

In terms of spool on the dyno it was never going to match exactly, even with the boost curve nailed - but within 500rpm, more likely. In terms of transient response it may be closer again, but having a full size GT30 turbine and larger a/r will always keep it a little less snappy at lower rpm. Once on the boil it'll be gravy

The overall performance will be interesting, however!

[joeyjoejoejuniorshabadoo]

my thoughts exactly...

transient response is the most important thing in my opinion (hence me sticking with stock cams), but that thing will definitely be a killer up top, and fairly easy to keep there on larger tracks....

might fail a little in the really twisty stuff though

[Lithium]

I'd say it'd be killer mid-range and up-top, really low down (ie, sub 3500rpm) will be where it'll be giving anything away to GT28 and trimmed GT30 turbines and the difference is not going to be in fail levels, by any stretch of the imagination.