Rb 25 Turbo Choices

[Plattsy]

In a stock weighted GTST R33/4 I don't really believe you can actually do 10s or even 11s with a 3076's, T67 or SLSS2 or what ever in that power range.

ARTz try take your car without stripping it to heathcote and you will be surprised how slow the time would be.

Have a read in my thread, my setup is fairly moderated, I had a better turbo with faster response and more power. and I can probably get a flat 12 / high 11s after many practices.

Having the power in a lighter weighted chassis and 4 wheel drive is an advantage. For a factory weighted R33/34 to run into 10s i believe it needs at least 450rwkws with better diff and possibly re-enforced drift shaft.

this is pretty much what i was going to say.

but its a circuit only car. set it up for drags. strip weld, lighten, full slicks, dif, suspension.

it will cost a f**k load to 10sec a 33gtst.

tell him to buy am rx7

[ARTZ]

lols...Simon r32 did an 11 flat with a t67 on its first run I have seen auto t67s in the 10s

sam aka Dr Drift did a 12 flat with a tdo6...in a r32

there is videos of both that I cant be bothered finding...and yes the r32 is a whole 50kg lighter...

Tao I'd expect to get a high 12 or 13 in my car at that strip on street tyres and if I didn't It would probably be my stock diff more than my power, or just my shitty driving skills.,I will try get there as soon as possible to see how I go anyway..

..but an eg, Hamish with a HKS pro-s got his down there at 12.4 or something and I dont believe he had alot of practice either...on street tyres with hard drift suspension..the reason me and alot of others wanted to see your turbos at the strip is because we were seeing alot of dyno results but no times...just because something makes X- amount on power on a dyno doesnt always relate to a fast car on the road..there has been some conjecture over your turbos doing this..proof was needed and well it looks to me like the proof is in the pudding, your car isn't pulling the times...Sorry to be brutally honest mate but a 500hp engine in a 1.5 tonne car should pull a 12 something reasonably easy on decent street tyres.....and yours has close to 600hp MTs and a fairly good driver at the helm something doesn't add up?

now I'm happy to admit I haven't done alot of drag racing (well not legally ) but i have watched and studied it for 20 odd years so I have a somewhat vague idea of what goes on...

[Lithium]

In a stock weighted GTST R33/4 I don't really believe you can actually do 10s or low 11s with a 3076's, T67 or SLSS2 or what ever in that power range.

ARTz try take your car without stripping it to heathcote and you will be surprised how slow the time would be.

Have a read in my thread, my setup is fairly moderated, I had a better turbo with faster response and more power. and I can probably get a flat 12 / high 11s after many practices.

Having the power in a lighter weighted chassis and 4 wheel drive is an advantage. For a factory weighted R33/34 to run into 10s i believe it needs at least 450rwkws with better diff and possibly re-enforced drift shaft.

Response doesn't help, the car's be on launch control sitting at 6500RPMs when taking off and peddle to metal every gear after. All this things that people do for better road driving ability that no affect in quarter times.

Believe what you like, R33s and Soarers with T67s and GT3076Rs can and have done those kinds of times - well not 10s specifically, but definitely close to.

You have a "better turbo" and better bolt ons, more boost, better fuel and you are aiming for times I was hoping to get near on my next outing with my R33 but unfortunately never happened due to the local strip being shut down.

As it was with my heavy full street R33 (with stuff in the boot) running BP98 with an internally gated/stock manifolds GT3076R I had hit mid 12s on ~15-16psi and a conservative road tune and a slippery track at that point, before retuning to around 300kw on 17-18psi. Even without the extra power I was sure I would have done better times with more seat time at the point I hit mid 12s, if I had E85 I would have been aiming for 11s on that setup, even with boost set to around 18psi.

[hypergear]

lols...Simon r32 did an 11 flat with a t67 on its first run I have seen auto t67s in the 10s

sam aka Dr Drift did a 12 flat with a tdo6...in a r32

Once again its a stripped R32 chassis with a Rb25 motor. They are totally irrelevant.

More power without been able to put it on ground only makes the car run slower with high mileage. Which my mileage do match HP ranking it comes down to launch.

Well you got a TD06 making 300rwkws on your R33, Take it to heathcote without stripping it on street tires, I think you will be sitting around 13sec with probably 110 miles after many practices.

[ARTZ]

Once again its a stripped R32 chassis with a Rb25 motor. They are totally irrelevant.

More power without been able to put it on ground only makes the car run slower with high mileage. Which my mileage do match HP ranking it comes down to launch.

Well you got a TD06 making 300rwkws on your R33, Take it to heathcote without stripping it on street tires, I think you will be sitting around 13sec with probably 110 miles after many practices.

lol...I know you're probably right..the truth is I would be pretty happy if I actually did get a 12 , a 13/14 is probably more realistic..

...my car has the AC ripped out but everything else is still intact as factory...

now back to my original point in this thread....If you re having trouble launching, put a smaller turbo on..I would be more interested to see what times your small turbos pull, If you can still pull a 12 then my point has been validated....

[ARTZ]

yer that is my fault, the more i have been talking in the SA section the more people believe AIR is opening its gares more often for 1/4mile runs.

But for now 1/8th mile is definate and so is hill climbs mostly.

But people i have been talking to and my tuner keep telling me i should do something with more potential as its cheaper and easier in the long run then changing things as i get bored etc.

Your advice has been great so far and i had no intensions of pissing you off.

Just i really really didnt belive, after using my r33 GTR with -5s and 353kws that a rb25 would be capable of making 10 second passes over the 1/4mile

as for something with more potential I agree, get a good clutch and big injectors, good manifold etc... get good supporting mods....

and spend time on setup your rear end to handle it all etc...

as for a turbo its very easy and not very expensive to swap that out later for a bigger unit later when you actually need it...

for now a big turbo would be just flogging out your driveline unnecessarily ...

sorry im just trying to help you get good times for what you originally asked...

[joeyjoejoejuniorshabadoo]

i haven't read the thread so I am not gong to comment on that, yet I will state my personal results.

unopened RB25 with HKS 2835 pro s running 323rwkw on trent's dyno with powerplus e85 (106 RON)

full weight R33 gtst

greddy type S coilovers with 6/8 springs (rear on softest, front hardest) quite low withrear camber bushes (near flat camber on WOT)

tyres were Nitto NT05's @ approx 30psi

ran 12.9 @ 119 MPH

first and only attempt at drag racing - shit is epically boring

[hypergear]

As it was with my heavy full street R33 (with stuff in the boot) running BP98 with an internally gated/stock manifolds GT3076R I had hit mid 12s on ~15-16psi and a conservative road tune and a slippery track at that point, before retuning to around 300kw on 17-18psi. Even without the extra power I was sure I would have done better times with more seat time at the point I hit mid 12s, if I had E85 I would have been aiming for 11s on that setup, even with boost set to around 18psi.

Well your best on street tyres was 13.2 at 112m/H on 280rwkws, and 12.6 on same mileage with slick tries. I run 13.0 "125m/H" at 360rwkws on street tires and 12.2 with semi slicks (M/T street are semi slicks) with single wheel launch due to slipping diff. From there you can work out how much power is required getting into flat 11/10secs based on a stock weighted R33

[ARTZ]

didnt Guilt-Toy run 10.80 with 380kws....its even in his sig....it was an rb30 though...

so maybe that tells us that torque factors are actually more important than any KW figures..

also apologies Stao I did forget your MPH have been quite high...

[jay-rod]

I ran a 12.8 with street tyres and 253 Kwatw

With mister hypergears turbo

Full street car 34, nothing stripped out, spare tyre aswell as 12 inch sub in the back.

[Lithium]

So you (or your tuner, or both?) have previously have told me that the correction you use reads like a Dyno Dynamics dyno, whereas my 280kw (was actually not running that power either of those times, more like 270kw) was on a hub dyno I've been told many times reads optimistically... so to use what I've been effectively told back on you - my car only had around 240-250kw when I did those times. They were all run on an airstrip with sub-par traction, I'd have had less on the DOT drag tyres (not full slicks) than you would have with ET Drag Radials - I struggled to go sub 2s 60ft but still did 12s with 2.0x 60ft times.

I realise it is slower, but I had hardly any opportunities to race the car due to no dedicated strip nearby and all things considered it isn't hard to extrapolate that it was barely scratching the surface - and still clearly could do 12s.

[joeyjoejoejuniorshabadoo]

ok have read... will throw my hat into the ring

NUTR33 ran a 10.9 @ heathcote with 370rwkw from an RB27, stock coilovers and mt's (think the car is full weight or at least close to)

as for turbo choice.... there is simply no better turbo for a street driven 33 than the HKS 2835, but good luck finding one now

I find the garrett 3071 and 3076 to lack the agression of the HKS item even though the power is very similar.

I would be looking at options for around 280rwkw on pulp if it was my car,

[joeyjoejoejuniorshabadoo]

So you (or your tuner, or both?) have previously have told me that the correction you use reads like a Dyno Dynamics dyno, whereas my 280kw (was actually not running that power either of those times, more like 270kw) was on a hub dyno I've been told many times reads optimistically... so to use what I've been effectively told back on you - my car only had around 240-250kw when I did those times. They were all run on an airstrip with sub-par traction, I'd have had less on the DOT drag tyres (not full slicks) than you would have with ET Drag Radials - I struggled to go sub 2s 60ft but still did 12s with 2.0x 60ft times.

I realise it is slower, but I had hardly any opportunities to race the car due to no dedicated strip nearby and all things considered it isn't hard to extrapolate that it was barely scratching the surface - and still clearly could do 12s.

yeah, my car reads within a few KW on trent's dyno and DD rollers

[Adz2332]

Just reading threads and re-reading threads and then reading again, im thinking the GTX3076R external gated and .82 is the way to go. run it on e85.

Gives me some head room if i want bigger numbers and more mods. Responsive, powerful etc. Gives me a good start point i think.

Just looking at manifolds, is there any other DECENT options to high mount it apart from the 6boost?

and, i know its a totally different question BUT whats better, having the wastegate gated off the turbo housing or the manifold??

[Lithium]

as for turbo choice.... there is simply no better turbo for a street driven 33 than the HKS 2835, but good luck finding one now

I'll put my neck out here and say that as soon as once someone gets an HTA GT3076R to their RB25 and gets a full tune on it there is a good chance that may change

[34GeeTeeTee]

I'll put my neck out here and say that as soon as once someone gets an HTA GT3076R to their RB25 and gets a full tune on it there is a good chance that may change

I think you will find a result soon! I've been watching BRI73Y's results and its been very interesting so far in the way in responds compared to my GT result! Could be a good thing!

[joeyjoejoejuniorshabadoo]

I'll put my neck out here and say that as soon as once someone gets an HTA GT3076R to their RB25 and gets a full tune on it there is a good chance that may change

I dont know... with the .82 rear and larger front the power delivery is still not going to be as brutal as the 2835...

however in saying this I have not driven a 3076 .82 with external gate on an RB25... but i still cant see it having the agression of the HKS unit, which for me is where the fun is at.

(i have driven an ex gate 3076 .82 on an RB25/30 however... shit was like driving on ice)

[34GeeTeeTee]

I dont know... with the .82 rear and larger front the power delivery is still not going to be as brutal as the 2835...

however in saying this I have not driven a 3076 .82 with external gate on an RB25... but i still cant see it having the agression of the HKS unit, which for me is where the fun is at.

(i have driven an ex gate 3076 .82 on an RB25/30 however... shit was like driving on ice)

My car runs the GT 3076 0.82 and is fairly aggressive onto boost... 1st and 2nd is really hard to pedal and get traction but 3rd grips up nicely and holds you pinned to the seat

Any more power like that HTA thing has the potential to do would be silly!

[hypergear]

So you (or your tuner, or both?) have previously have told me that the correction you use reads like a Dyno Dynamics dyno, whereas my 280kw (was actually not running that power either of those times, more like 270kw) was on a hub dyno I've been told many times reads optimistically... so to use what I've been effectively told back on you - my car only had around 240-250kw when I did those times. They were all run on an airstrip with sub-par traction, I'd have had less on the DOT drag tyres (not full slicks) than you would have with ET Drag Radials - I struggled to go sub 2s 60ft but still did 12s with 2.0x 60ft times.

I realise it is slower, but I had hardly any opportunities to race the car due to no dedicated strip nearby and all things considered it isn't hard to extrapolate that it was barely scratching the surface - and still clearly could do 12s.

Difference between Trent's dyno and a roller dyno is 4kws at 280rwkws. Well you can calculate the car weight vs the M/H to approximate the power level.

Mine is ET street not ET drags. I'm originally wanted ET Drags but there are nothing fit.

[joeyjoejoejuniorshabadoo]

My car runs the GT 3076 0.82 and is fairly aggressive onto boost... 1st and 2nd is really hard to pedal and get traction but 3rd grips up nicely and holds you pinned to the seat

Any more power like that HTA thing has the potential to do would be silly!

where do you see full boost? (dyno in 4th)