[Any Advantage To Runflat Tyres?]

the only advantage is not carrying a spare. Other than that they're expensive, so spend your money on a better quality tyre instead. It's annoying in beemers etc where there's no well for a spare

I don't even bother carrying a spare anymore unless I'm going on a roadtrip. Around town I'll just ring the missus or a mate

Haha .. OK good point!

[To The Skyline R33 Gtr Guys: Is 245/45 Wobbely?]

Also, winter tyres won't be so good in summer eh.

Haha ..

Actually these tyres are very soft and traction is horrible if not scary!

Makes for a good show though

That's why I need to change them but they're okay for getting an idea about sizes / clearance

(since the whole debate)

[To The Skyline R33 Gtr Guys: Is 245/45 Wobbely?]

Thanks,

265 sounds wide is that also on the fronts?

With 245 at the front and 30 offset the tyre seems already at a narrow clearance towards the arches.

[To The Skyline R33 Gtr Guys: Is 245/45 Wobbely?]

Um. Wat?

20mm extra diameter is not a good thing. Hello speedo error. Hello taller gearing.

For all that.....there's nothing wrong with 245/45 as a tyre size in itself. It is neither going to be much better or much worse than a 255/40 in any real way. You'd be hard pressed to feel the difference in grip, firmness, sidewall flex, traction....anything. The 255 would be the better choice just for being closer to the right size (rolling diameter), that's all.

If you leave them on there 'til they wear out, and you want to go for wider tyres that still retain some of the extra sidewall height, you could probably squeeze a 265/40 onto 9" rims on that car. Gains you a bit extra rubber on the road and half the extra sidewall you have now.

Hi!

Speedo error seems no too bad.

(that's compared to the standard GTSTs)

Look here:

http://www.tacomaworld.com/forum/tirecalc.php?tires=205-55r16-245-45r17

And 3% longer gearing seems to be an option,

Here's how it looks at the moment:

[To The Skyline R33 Gtr Guys: Is 245/45 Wobbely?]

Alright,

Thanks .. I was just thinking since 255 and 40 profile has smaller side-walls it would make a a real world difference

(just by using the link I provided in my first post)

I have the 245 on right now and clearance wise it seems ok

[To The Skyline R33 Gtr Guys: Is 245/45 Wobbely?]

I got myself a pair of R33 GTR wheels for my GTST with 245/45/17 on them.

They're snow/winter tyres since they came from Japan.

I like the size since the tyre diameter is 2cm more than the standard 205/55/16

It looks good I find and gives good riding comfort.

(have a lot of potholes and speed bumps here)

In your experience is 245/45 a good choice for your cars or gives 255/40 more control?

http://www.tacomaworld.com/forum/tirecalc.php?tires=245-45r17-255-40r17

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

Thanks mate,

looks good!

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

if its a track car I'd go 255s on the front as well...

Hmm

That would possibly get a bit close to the arches and splash guards.

But I will double check.

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

The R34 GTR rims are 9'' wide by 18''

But if you say 265 is no issue then that would leave me with more options.

Do you have a close up picture?

Is there any ballooning?

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

265's fit perfectly on BNR34 rims. I run them on my GTT (all 4 corners).

Hello,

Are you on r34 GTR rims or R33?

I got the R33 rims which are 9'' wide and I think the R34 ones are 9'' as well?

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

Ive got R34 GTR wheels and have 245 front 265 rear and they fit well. using stock Bilsteins.

Thanks,

Is it 35, 40 or 45 profile?

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

Hi,

Thanks for that ..

How well do the 265 fit on the 9'' GTR rims ?

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

Hi,

Thanks ..

The 245 do fit with just a slight rubbing issue on full lock and cornering on the right side only.

I could remove the splash guard or just tread that area with a heat gun and push/mould the plastic back a bit.

The wheels I bought are GTR wheels and came with 245 all round (but need to be replaced)

Rear is fine with 245/45, and 255 40/45 should just about fit without any drama.

[235 Vs 245 Front / 255 Rear Any Impact On Handling? (Gtst)]

Hi,

As for over / understeer does it make any noticeable difference on a GTST if fronts are either 235 or 245?

I read that most people recommend 235 at the front, so is there any downside to 245?

(Rear will be 255)

Thanks

[Any Advantage To Runflat Tyres?]

Ok .. cheers for that!

The thought about carrying drugs across boarders is a valid point though!

[Any Advantage To Runflat Tyres?]

Besides the obvious advantage of running flat is there any other advantage to these tyres?

For example does the stiffness of the side-walls help to better control the car (less flex?)

Thanks ..

[R33 Gtst Wheel Space / Offset? (R33 Gtr Wheels)]

Yep ... all valid points ... will go for the GTRs and see if 255 or 265 fit under the arches

[R33 Gtst Wheel Space / Offset? (R33 Gtr Wheels)]

OK,

Thanks for the answers ... I'm well aware that this been asked a million times but the information is really scattered.

Yep, I did re-search . but just wanted to have possibly a straight answer before I end up buying the wrong tyres.

I read anything from (offset) +35 all round to +20 which sounds odd.

I was going to measure the clearance myself to gain an understanding about which offset to chose (not just for the R33 GTR wheels)

Also I'm still torn between the GTR wheels and 18'' Rota Grid Drift.

Cheers ..

[R33 Gtst Wheel Space / Offset? (R33 Gtr Wheels)]

Yep ... I did look at the million posts

But just thought someone could give me a straight and quick answer.

[R33 Gtst Wheel Space / Offset? (R33 Gtr Wheels)]

Would anybody know how centred the standard wheels sit on a GTST?

(Offset is 40)

I mean would I have more space to the inside or outside of the arches?

(considering I'm going to roll the lips)

Inside seems limited by the shocks and outside by the arches.

I'm trying to figure out the best offset/ width for me.

I found some 17'' 9' 30 GTR R33 wheels and am marvelling to go for it or not.

What tyre width would fit nicely on a 9'' wheel without ballooning and still fit?

255, 265)

Thanks!

[Hks Gt2835Kai Still A Good Option?]

Believe me, if you can get a stronger spring on the gate the manifold will hold more pressure, meaning the turbo will spin faster and create more boost. This will usually make more power and always add torque.

More preload on the actuator doesn't work as well as a properly selected gate spring. Try and run as close to your desired boost as possible.

A bigger turbo comes with drawbacks. Not saying don't do it, but there are many ways to get more power without changing it.

Thanks,

Yes, I don't want any more lag that's why I was investigating the ball bearing HKS.

At current I like my setup / engine response and worked long and hard to achieve this.

260KW at the wheels is not bad and the car is fun to drive.

I will check on the actuator just to be 100% certain.

But as said the Turbo is rated at 400HP and I think I simply reached that limit.

[Hks Gt2835Kai Still A Good Option?]

If you can keep your wastegate closed longer you may make more boost. You say you need airflow not boost but to use your terminology when your boost gauge reads 20 psi that indicates that the turbo has caught up to the flow through the engine - you have no other way of measuring flow unless you have a read out from the maf.

Having said that it is possible that your turbo has indeed run out of puff but check the wastegate boost control first.

HI!

Misunderstanding:

I did not say I need more airflow not boost, but merely said that it's not boost which makes the power. (since people always say you need such and such boost levels for such and such power)

And of course If my boost goes up the airflow will increase.

I will check the actuator but it is an adjustable one and the preload (of the spring) is pretty heavy.

Btw:

I can read my MAF values (voltage) in real time through Nistune.

This is a direct representation of mass air flow (MAF)

Cheers

[Hks Gt2835Kai Still A Good Option?]

I never investigated the wastegate but the actuator is set to one bar and the controller .5 bar higher.

The turbo is rated at around 400HP (based on what it can flow) and boost drops gradually since the turbo can not keep up with air demand from the engine.

You can see this on many dyno graphs that boost gradually drops and this is not due to the wastegate.

(though a blown open gate is always an option)

Boost is meaningless anyhow, it is the mass of air going into the engine which makes power (+ the fuel of course)

Still I will check on the WG but I think that is not the problem, I just need a bigger turbo

[Hks Gt2835Kai Still A Good Option?]

If your making 260kw @ less than 14psi, I'd be winding your existing turbo up to 20-22psi and seeing how close you get.

You'll need to run this sort of boost to crack 300 if you swapped out your turbo for those mentioned anyway looking at various results from others running 300+

Yes, but the engine outflows the hybrid-turbo so I can not up the boost.

In other terms:

The turbo can not deliver more flow and is running out of puff.

That's why I am looking into other turbo options.

[Hks Gt2835Kai Still A Good Option?]

Thanks for the feedback.

The easiest option for me is a drop in replacement since this is what I have right now.

So I wanted to know if the KAI would get me towards 300KW.

Going E85 is not really an option since the car is used as daily ride and E85 is not that common in the UK.

Of course I could throw in a bigger turbo on hi/low mount and make 300KW.

But that would constitute ripping my current set-up apart.

Yes, my car is set-up for 300KW (4 Inch / 3.5, Poncams, TomeiFuel Pump, 555 Injectors, Blitz FMIC etc.)

I am making the current 260KW at .9 BAR ! so the engine flows very well.