Ask GTP About Your Car Problems/General Questions

I don't see how fortifying your seat could be illegal... and gangsta lean is leaning sideways in the seat, possibly with the seat back all the way down.

""Gangsta Lean" is an urban slang phrase denoting a style of automobile driving in which the driver sits slung low and tilted toward the passenger seat."
 
Everyone here refers to gangsta lean as having the seat leaning far back.
 
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Anybody have any tips on removing carbon build up from the exhaust on a diffuser?

I've tried washing and wax & grease remover(which is great at removing most contaminants on paint) to no luck. Polish/cutting compound of any sort is not an option as the diffuser is painted or powdercoated but the paint has a rough texture to it.

Sandblasting, and re-painting.
And maybe an O2 sensor so it doesn't happen again? Or new piston rings, valve seals, and/or head gasket.... something in there woulda kept it from ever happening.
Damn, I forgot intake manifold gasket.
 
Sandblasting, and re-painting.
And maybe an O2 sensor so it doesn't happen again? Or new piston rings, valve seals, and/or head gasket.... something in there woulda kept it from ever happening.
Damn, I forgot intake manifold gasket.

In all this listing of stuff that could be wrong with the car, why are you excluding the factory tune?

It's called being pig rich and not being able to do anything about it but spend money on a reflash. :P
 
Would extra framework (for side bolstering) be legal?

I think the bigger deal is not whether it's street legal, but whether your modifications will be accepted as safe at the local tracks you frequent. Best to ask.
 
How much do seat rails cost? I'd be tempted to just pick up some universal seat rails and modify them if needed. Seems a lot easier than trying to modify the seats themselves.
 
A friend of my brother's had some seats modified for his VH Commodore, but that was a show car and no idea how much it costed or if the extra bolstering did much good because they probably didn't add extra framework. Universal seat rails? Never heard of them....
 
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In all this listing of stuff that could be wrong with the car, why are you excluding the factory tune?

It's called being pig rich and not being able to do anything about it but spend money on a reflash. :P
Because unless it's an older diesel, factory tunes NEVER blow black smoke. Yes, I said never.:sly:
 
This is more a motorsport question, but is there any real advantage for not using ABS in racing? From what I can tell, it's more of a disadvantage because if you brake too hard, your wheels lock up, you can't stop in time and crash
 
For street cars, the factory ABS system can't really cope with race slicks. Otherwise, unless its rule related, I think its just that the drivers have enough control to know how much to brake and they want that full control.
 
There were some Porsche Cup cars that tried ABS for a year or 2 a few years back, not sure if it was much better though. What I do know is that I wouldn't want my brake pedal pulsating up and down while I'm trying to heel-toe.
 
This is more a motorsport question, but is there any real advantage for not using ABS in racing? From what I can tell, it's more of a disadvantage because if you brake too hard, your wheels lock up, you can't stop in time and crash

A good ABS system will stop the car faster than any human foot.
So the real question is, how good is the abs system?
You'll notice car reviews on cars without ABS have phenomenally longer stopping distances than comparable ABS-equipped models.


But in racing, there shouldn't be ABS, TCS, Stability control, automatics, automatics called manual even though there's no clutch (like new GT-R's) or anything else that's a ninny of any kind. JMO.
Seat, steering wheel, 3 pedals, and a shifter. that's it.
 
In certain conditions, a non-ABS equipped vehicle will stop faster. On loose surfaces, ABS is a big detriment to stopping distances. On a dry surface, ABS can shorten stopping distances compared to fully locked brakes, but threshold and/or cadence braking can produce even shorter stopping distances.

ABS can help you stop quicker... but it'll depend on the sensitivity of the system and the programming... some ABS-equipped vehicles stop very quickly... other ABS systems trigger way too early and result in terrible stopping distances... almost got into a collision back in the early 00s with an ABS-equipped Sentra... the ABS system started clicking away when I hit the brakes... went nearly fifty feet on a completely dry road, on new tires, before chattering to a stop from just 25 mph. All this because the road surface was rutted, and the momentary loss of traction over each bump caused the ABS to intervene. Suffice to say, I was pissed. Our non-ABS Sentra (same year-model) consistently braked better than that car and I wasn't sad to see it go.

And if you change tire compounds or brakes or brake pads, some stock ABS systems are just completely out of their depth. They activate waaaaay before lock-up, and on cars with aftermarket brake kits, stopping distances can get much longer because the system never allows you to apply anything near 100% of the stopping force those brake kits give you.

That given, if you have a good ABS system, it'll help you on track... preventing rear-end lock-up that will spin you out or front-end lock-up that will have you washing wide. It's banned for most series because it makes driving too easy in the constantly changing conditions you find on track.
 
A good ABS system will stop the car faster than any human foot.

Not even close.

The difference is that ABS can afford you almost as much braking power as your foot alone, while retaining the steering control that is afforded only to the very best cadence brakers.
 
So to sum it up, a race car driver will be faster without ABS.:) Average Joe who isn't as sensitive to threshold braking, or is in a panick situation will be better off with most ABS systems.
 
Seat, steering wheel, 3 pedals, and a shifter. that's it.

There we go back to stiff axis, no suspension, ...
Good luck to race with a soap box like that.

Be clear, frame stiffness, suspension, rear wings, traction control, ABS, .... are all evolutions to help, ... it is very strange to see "speed control" in F1 not to get penalities in the pit lane.

It is up to the organizer to set the rules.

So I still agree no TCS, Automatic, etc... for my races.
 
You'll notice car reviews on cars without ABS have phenomenally longer stopping distances than comparable ABS-equipped models.

A car with ABS will always have longer braking distances compared to the same car without ABS system.

ABS only limits the amount of pressure applied on the brake circuit to activate the brake on one or more wheels to prevent it to ever blocking, thus keeping at all times intact ability to turn under heavy braking if needed.

In resume: ABS = longer braking distances + steering responsiveness while braking (heavy). No ABS = shorter braking distances + no steering responsiveness if wheels block under heavy braking.
 
A friend of my brother's had some seats modified for his VH Commodore, but that was a show car and no idea how much it costed or if the extra bolstering did much good because they probably didn't add extra framework. Universal seat rails? Never heard of them....

I was thinking something along these lines
http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Interior/Seats/auction-280799516.htm

Maybe you could modify the rails themselves to sit a bit lower? I have no idea what that would cost, or whether that would be safe at all.

Edit: You'd need the seat mounts as well. Probably starts to get expensive...
 
I was thinking something along these lines
http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Interior/Seats/auction-280799516.htm

Maybe you could modify the rails themselves to sit a bit lower? I have no idea what that would cost, or whether that would be safe at all.

Edit: You'd need the seat mounts as well. Probably starts to get expensive...

I suppose I could ask around the traps like Repco if they know of any universal seat rails as well. LOL, I tried getting out of a 200SX up a slope yesterday that was lowered, I had difficulties because of how big and sort of fat I am.:lol:
 
Haha both legs out first, and then stand up. Way less awkward.

Don't know if I could have heaved myself up the slope from such a low spot, and I didn't want to touch his pearl paint too much. :lol:
 
A car with ABS will always have longer braking distances compared to the same car without ABS system.

ABS only limits the amount of pressure applied on the brake circuit to activate the brake on one or more wheels to prevent it to ever blocking, thus keeping at all times intact ability to turn under heavy braking if needed.

In resume: ABS = longer braking distances + steering responsiveness while braking (heavy). No ABS = shorter braking distances + no steering responsiveness if wheels block under heavy braking.

I disagree and say the opposite.
In a none ABS car If you stamp on the brakes (to hard as an immediate reaction in real life situations) you lock them up then release brake pedal pressure and apply again to stop.
An ABS can do this a thousand times quicker than you with the pressure issue and the apply and release issue which is why you feel a pulsation in the brake pedal,
You also have the added safety of being able to steer around something with heavy braking applied (Like a child running out between a parked cars)
So ABS doesn't just limit the amount of pressure.
 
Regarding ABS... one of (if not THE) best safety feature ever invented for cars.

People saying 'I'd rather have no ABS, I can stop quicker' are full of BS... I can't think of a race series where teams would decide not to use it if the rules allowed it... F1 is the pinnacle of motorsports, and all the teams would use ABS if it was allowed in the rules.

I'm not sure how average Joe can claim to be better off without it when the best drivers in the World would chose to use it... well, other than bravado ;)
 
I disagree and say the opposite.
In a none ABS car If you stamp on the brakes (to hard as an immediate reaction in real life situations) you lock them up then release brake pedal pressure and apply again to stop.
An ABS can do this a thousand times quicker than you with the pressure issue and the apply and release issue which is why you feel a pulsation in the brake pedal,
You also have the added safety of being able to steer around something with heavy braking applied (Like a child running out between a parked cars)
So ABS doesn't just limit the amount of pressure.

Regarding ABS... one of (if not THE) best safety feature ever invented for cars.

People saying 'I'd rather have no ABS, I can stop quicker' are full of BS... I can't think of a race series where teams would decide not to use it if the rules allowed it... F1 is the pinnacle of motorsports, and all the teams would use ABS if it was allowed in the rules.

I'm not sure how average Joe can claim to be better off without it when the best drivers in the World would chose to use it... well, other than bravado

Firstly, I agree that ABS was/is one of the major safety inventions in the auto industry and it is a must have in all road-going cars.

A car will stop in a slighty shorter distance if its wheels are block. When they are fully lock and the car is slidding, the only energies that are still causing that motion are the ones resulting from the inertia coming from the car's speed+its own weight, and will stop when the tyres grip ability equals or exceeds that inertia. Drivability on the other hand under those circumstances is close to zero. When in a non-ABS car you loose the brake when you feel the wheels locking what you are doing is none the less than doing "manually" exactly the same thing that ABS system would do: release pressure applied on brakes, thus reliefing the wheels allowing them to spin again. Obviously, that "system" is much faster doing it than the human.

So, what you both say is not entirely wrong because it'll be your natural tendency (while in a non-ABS car) to relief the pressure on the brake pedal when you feel the wheels locking. And since the system more efficient in doing so, obviously, under those circumstances, the ABS car will stop in a shorter distance.

However, when I said that the ABS car would always have a longer braking distance than the non-ABS one, I was assuming similar cars, track conditions, and behaviour from the driver. And under those circumstances (in the non-ABS car keeping the brake pedal to floor all the time) I repeat: the non-ABS car will always stop in a shorter distance.

Now this is obviously an abstract situation and in practice, in a real-life situation, in the traffic, there are several other factors to be accounted as other vehicules/people and there, for obvious reasons, you need to keep all the times the ability to steer away for any obstacle during braking - this can only be assured by an ABS system. And it does so because of the pressure relief it would apply on the braking system to prevent wheel block - technically this is what ABS does and how it operates.

As for applying it to the racing, the gain of it wouldn't be getting shorter braking distances but the ability of preventing the braking while turning without the risk of wheel blocking - which, every time it happens under those circumstance, contribute immensly to unbalance the car thus causing the driver to lose time whilst struggling to regaing that balance back.
 
I know I asked this here last year and never really got a response.

My front end vibration under braking problem has returned.

It is intermittent and doesn't happen all the time. When it does happen, it's intensity varies. Sometimes it is a very slight vibration and other times it feels like the front wheels are going to fall off.

Here's the weird part, it seems only happens in warmer weather (60°F+), and doesn't usually happen until after driving for a while and everything is up to temperature.

Given that it doesn't happen all the time, and varies with intensity when it does happen, to me it pretty much rules out warped rotors.

Any thoughts of what else it could be?
 
I know I asked this here last year and never really got a response.

My front end vibration under braking problem has returned.

It is intermittent and doesn't happen all the time. When it does happen, it's intensity varies. Sometimes it is a very slight vibration and other times it feels like the front wheels are going to fall off.

Here's the weird part, it seems only happens in warmer weather (60°F+), and doesn't usually happen until after driving for a while and everything is up to temperature.

Given that it doesn't happen all the time, and varies with intensity when it does happen, to me it pretty much rules out warped rotors.

Any thoughts of what else it could be?

What car is it?
Have you checked the disc run out with a dial gauge though?
Are the wheel bearings smooth and noise free?
Are CV joint smooth and noise free? (if FWD)
Are the wheels correctly balanced?
Has it got aftermarket wheels fitted? If so is the spiggit ring fitted or the correct size?
 
I got Dunlop Star Specs installed about a week ago. I've noticed when the tires are cold, they pick up and throw rocks almost nonstop. However, once they've been driven and warmed up they stop. I can understand why they would pick up rocks in general since its a soft compound, but they only get softer when they warm up. Just thought it was interesting.
 
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