robthedoc's ek9 turbo, adventures in boost!


Sorry to sound a bit ignorant, I've no been on the forum properly in a while.. So this thing works and you have MOT? Haha
 
jesse888 said:
I find the heads on these quite noisey anyway rob so I wouldn't worry too much.
Might not be helped by our oil feeds to turbo. ESP on idle.
You'd recomend the Plx then?
One thing I'm wary of with tuning mine on the road is the unreliable AFRs.
Was going to just tune it rich until I could find a dyno but if these are cheap.
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Yeah I think your probably right on the money there mate, could fill it with 20 w50 lol that would probably shut it up. I can live with it, its not BAD bad but compared to a stock b18c its annoying.

PLX is far more responsive than the aem mate. It has some nice features too and the OLED display is very nice to look at. When you come off throttle it recognises theres no fuel and says air, graph view is good but quite small to see when driving. Sensor health check and response time check also handy. Theres other features like alarms etc but I haven't tried them. Given its more or less the same money as the aem 30-4110 that uses the same sensor its a million times better.

xxxencorexxx said:
On the subject of plx, what do you guys think of the plx kiwi wifi/bluetooth devices connected to a smartphone/tablet.
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Havent seen this mate but I will check it out.
 
Sounds like a sound investment, does it datalog?
Although you can do this through the s300.
 
robthedoc said:
Yeah I think your probably right on the money there mate, could fill it with 20 w50 lol that would probably shut it up. I can live with it, its not BAD bad but compared to a stock b18c its annoying.

PLX is far more responsive than the aem mate. It has some nice features too and the OLED display is very nice to look at. When you come off throttle it recognises theres no fuel and says air, graph view is good but quite small to see when driving. Sensor health check and response time check also handy. Theres other features like alarms etc but I haven't tried them. Given its more or less the same money as the aem 30-4110 that uses the same sensor its a million times better.



Havent seen this mate but I will check it out.
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Here is more info:
http://www.plxdevices.com/Kiwi-3-OBD-Car-to-Smartphone-Connection-p/897346002832.htm

Some off the apps i seen for it look pretty impressive.
 
Also worth mentioning... Swapped the tyres front to back so running the 595 rs-r up front now. Very impressed for the money. Not quite as good as the ad08 but still working very well.
 
robthedoc said:
I don't think it does man. No way of recording anything as far as I can see. Maybe through the apps.
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It's ok the hondata will do it anyway, was thinking for other cars
 
Plx is what hondata recommend you use I think. These should be better/more reliable than the AEM ones :)
 
Yeah it's just no good for me if I want to tune other cars with it is all.
I was thinking it's more of a portable afr metre for tuners than an insitue gauge job.
 
robthedoc said:
Also worth mentioning... Swapped the tyres front to back so running the 595 rs-r up front now. Very impressed for the money. Not quite as good as the ad08 but still working very well.
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What size did you get? 205 50 15 ? I'm looking at them. I'm running ad08 but 195. Hopefully the 205 will help with traction
 
205 45 16 mate, tried ad08r and 595 rs-r. For about half the money the federal definitely isn't half the tyre, its capable in the dry and more or less the same in the wet. Just not quite as good as the advan.

On this not tho mate... An engineering guru and serious car enthusiast I know shot me down for making the same point you did. His comments.... Friction is not dependant on surface area, a wider tyre will handle heat better but this won't equate to more grip in small amounts. As per I thought I knew better so borrowed a pair of wheels with 225 tyres and... no different. Still lit them up just as easily.
 
robthedoc said:
205 45 16 mate, tried ad08r and 595 rs-r. For about half the money the federal definitely isn't half the tyre, its capable in the dry and more or less the same in the wet. Just not quite as good as the advan.

On this not tho mate... An engineering guru and serious car enthusiast I know shot me down for making the same point you did. His comments.... Friction is not dependant on surface area, a wider tyre will handle heat better but this won't equate to more grip in small amounts. As per I thought I knew better so borrowed a pair of wheels with 225 tyres and... no different. Still lit them up just as easily.
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Pressure(weight) over area I guess. I would say a wider tyre helps in the corners though from my experience.
 
Just talking out loud (probably wrong) but the way I understand it like this...

Pressure (car exerts this on the ground so can be considered constant) = Force (exerted on the ground) x Area (tyre surface area in contact with the ground)

The pressure is constant, so if you increase the tyre width, the area increases and then the force decreases. If you use the same tyre compound, the friction coefficient is the also constant. Friction force of the tyre is directly related to this, so the friction force is also constant.

Basically, using a wider tyre decreases the force exerted on the ground, but you have too much power (is that even a thing? :p) and the force exerted by the wheels onto the wider tyre is still overcoming the friction force of the tyre.

I think that's right...

TLDR: Boost = BRAAAAAAP.
 
I don't know the right or wrong answer but, I love all this stuff. Makes me feel really stupid which leads to mass reading and then awarding myself many masters degrees in many subjects :blinx:

I'd agree with you though Jesse, wider tyre = better (well, more) grip when cornering. I'd guess that this is kind of the counter side to what Rippu is saying about putting force down, when the weight transfers during cornering a larger contact with the road spread the force over a larger area and therefore mean higher forces can be exerted before the tyre is on it's limit. Or maybe it only makes sense in my tiny mind.

Anyway Rippu this is the same guy that was on about that book lol
 
I did read that drag cars have large side walls because the patch that's touching the ground is then longer and is inline with the force exerted to propel the car forward.

Same for say an F1 car (ignoring regulation) they need to go round corners faster. So the force exerted is lengthways across the tyre. Thus wider patch touching the floor and a smaller sidewall...?
 
Aye, that makes sense! Suppose this can really be split into 2, traction and cornering.

Either way though, the wider the tyre the less the force being exerted onto the tyre/tarmac. The main difference is that cornering is a slow loading in comparison to say a harsh acceleration, which is when traction will be overcome.

I think the drag cars have such large sidewalls is so that they can run a low pressure and have the contact patch be more rectangular than a line, which is what you should have if you have a perfectly round tyre at a normal pressure? This would also go inline with why most racing series have a minimum tyre pressure they can run, obviously safety is another factor for this.

P.S. I love all this stuff too Rob, feel like I actually get to apply the stuff I learned at uni haha. It's like back in the day when @Kozy was still about and we'd talk about thermal efficiency and stuff haha.
 
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