Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Topics - andrewrx7

Pages: [1] 2 ... 6
1
General Technical / Brake temp on track days
« on: May 09, 2015, 06:38:20 PM »
Hi,

I've got an cheap run around that I want to use for a bit of track day fun. I'm curious to see what kind of temps the front brakes can get up to (approximately, on standard brakes) after a few laps round a track. Not specifically a rotary, any car would do.

Has anyone measured these temps when they've been out?

Ta!

2
Rotary and General Chit-Chat / Got myself another Mazda...
« on: January 03, 2015, 03:38:52 PM »
...and have just bought a CX-7. Not the earlier one with the MPS engine though, the later updated version with the diesel. Not a bad motor for the money, even if I do say so myself! :-)

3
Rotary and General Chit-Chat / Advice on strange brake pedal feel
« on: January 02, 2015, 04:44:01 PM »
Hi,
I'm after a bit of technical advice, if anyone can help. It is a question about brakes but not on a rotary car, but not that that really matters.
One of the cars I have, seems to have a delayed action on the brakes after I press the pedal. By this, I mean that if I press the pedal, even very hard, there seems to be a couple of seconds delay before I feel any braking effect. This is also the case if I emergency stop. Discs are all good, virtually new condition, almost new pads all round, fully bled the system with new fluid. I've checked all four calipers, and carriers and slider pins are all free to move. Pistons seem to move ok. No fluid leaks anywhere.
So why the scary feeling brakes? There seems to be no initial bite until the pedal is pressed pretty hard even then it feels like there is little braking effort. If I emergency stop the car just slows down rather than the ABS kicking in as with the other cars. It is just very disconcerting pressing the pedal and waiting for the brakes to apply...!
Any ideas what could cause this? I've bled the system several times, never got any air from any of the calipers. I keep thinking a master cylinder issue, so do these symptoms sound like it could be?
I'd appreciate any pointers of what may be wrong!
Thanks
Andrew


4
General Technical / Question about oil change intervals in track cars
« on: August 24, 2014, 08:25:20 PM »
Hi,
Just want to ask a general question regarding oil change intervals on tracked cars. Not necessarily rotaries, but engines in general. For those that enjoy tracking cars, how often would you look at changing the oil and filter?  Got myself a runabout for the track, but would like some advice on  what others do about frequency of changing their oils. Every few track days, or time spent on the track? By mileage? Would appreciate some advice, thanks!

5
General Technical / Road tyres with the occasional track day
« on: June 06, 2014, 12:19:33 AM »
Hi,
My father in law and I bought a cheap run around to do some track days (we work next to Bedford Autodrome, so not far to go! Lol!).
Anyway, we are not professional track drivers and don\'t want to stretch to semi slicks just yet. We need new tyres now ( got really cheap Chinese tyres on at the moment and want shot of ASAP).
I\'d like to ask for suggestions on what people have used? Basically we want a road tyre but one that is very grippy for the odd track visit. We won\'t be using the car regularly, so wear isn\'t really a consideration because of high mileage. Just wondering whether there is any consensus about what are seen to be the best road/track tyres?
Thanks!

6
General Technical / ATE Blue brake fluid
« on: June 03, 2014, 10:03:35 PM »
Hi,

Just bought some ATE Super Blue DOT 4 brake fluid. I notice on the front it states it is illegal for use in road cars. A very quick scout on the net suggests this is a US thing, where the fluid can only be clear or amber (in other words the fluid is the wrong colour!).

Anyone know whether this also applies to the UK?

Thanks,
Andrew

7
Hi,

What are people’s views on the efficacy of plain disks vs drilled vs grooved? Are the holes and grooves just a piece of marketing hype, or do they actually help under certain conditions? I’ve just bought a cheap run around and will be doing a few fun track days with it, but was advised to stay clear of the grooved/drilled options because they do little to improve braking but eat the pads much faster. Just thought I’d ask for other opinions – but I guess I’ll get a mixture! I understand the points about de-glazing and better air flow to aid cooling etc, and the concerns about drilled holes fracturing due to heat stress, but do the advantages actually exist or is it better to go with plain disks?

Cheers!

8
Rotary and General Chit-Chat / Clutch question - non-rotary
« on: May 10, 2014, 06:23:31 PM »
Hi there,
A friend has picked up a cheap Mk2 MR2, but the clutch needs replacing. Has anyone had one these cars, or worked on them? If so, any idea whether a clutch change is easy (within reason!), or whether it is an utter pain (e.g. engine out job)?
Cheers!:Thumbs-up

9
General Technical / Engine failure
« on: May 08, 2014, 06:46:31 PM »
Hi,

I\'d like to ask for opinions. I\'ve been looking at an 54 plate RX8, with around 90k miles. I found out tonight that it has a blown engine. The owners description was along the lines of "alot of smoke came out the back when I was driving it". In addition, someone had a look and apparently there is oil in the water.

Could someone with a bit of knowledge suggest reasons for the above? Oil smoke suggests an oil seal ( to the side of the rotor?) has gone, and oil in the water suggests maybe part of the housing casting along the cooling channels has also broken? I remember seeing pictures in the past where the castings are very thin and can leak or break from corrosion?

He said he was quoted £1700 to fix (not sure what that means, but apparently he has a report but couldn\'t find it just now). He didn\'t say who this was, but hopefully will find out when I see the report.

Any thoughts?

Thanks,
Andrew

10
RX-8's / Long shot - recognise this number plate?
« on: April 24, 2014, 11:38:51 AM »
Any RX8 owner recognise this plate? FM54 UXD. It\'s a non-running 8, bought at an auction a few months ago apparently. It\'s parked up in front of our building, and it\'s been suggested that the guy who bought it may want to get shot of it. Just thought it was worth a shot to see if anyone recognised the number and had any history. Thanks.:Thumbs-up

11
Rotary and General Chit-Chat / Dead RX8 : value?
« on: April 22, 2014, 05:55:39 PM »
Hi,
We\'ve had an RX8 parked up outside where I work for maybe 6weeks now. Just found out today that it belongs to the guy who owns the buildings. I\'ve been told that for "various reasons it doesn\'t work". It has been suggested that there may be a deal to be done, suggesting he wants to get rid of it.
I have no idea on values of 8\'s. So asking for opinions please. I know nothing about the car apart from it doesn\'t run. It is a 54 plate.
Anyone care to suggest a price that a 9-10yr old RX8 in non running condition would go for? From the outside it isn\'t in pristine condition either, with a few minor dings in the bodywork.
Any help would be appreciated!
Cheers
Andrew

12
Rotary and General Chit-Chat / 787B engine review
« on: January 18, 2012, 10:32:19 AM »
For anyone interested, just stumbled across this paper...

http://www.rotaryeng.net/Mazda_R26B_US.pdf

13
Rotary and General Chit-Chat / MSN Most Disappointing Cars
« on: September 16, 2009, 11:14:51 PM »
:rolleyes: Well, 3 rotary powered cars managed to make this made up list! http://cars.uk.msn.com/features/photos.aspx?cp-documentid=148225521

I suppose you could look at it as the other 47 cars are piston powered!!

You gotta laught at the RX8 comment " but what about the fact that it guzzles oil and petrol plus has the world\'s first torque-free powerplant?"!! :Hammer

14
Rotary and General Chit-Chat / A "how do they do that" question
« on: June 26, 2009, 01:47:26 PM »
Was watching a program on Megastructures on NatGel channel last night, and they were following the construction a skyscraper in China. Just looked up the tallest man made building, the Burj Dubai. There is a picture (attached) showing construction at the top. I am not a construction engineer, but I understand how the cranes remain at the top of these structures, but how on earth you get those 2 cranes down from 3/4 of KM up in the sky?!?
Hats off to the construction people, steel workers etc - I get dizzy just looking at the pics!

15
Rotary and General Chit-Chat / MSN comments on Jap sports cars
« on: January 07, 2009, 10:19:43 AM »
Their comments on the RX7 - (they seem to like it:)):

Mazda RX-7

It is gorgeous to look at with curves in all the right places and punchy supercar performance to go with the sensational styling: 150 mph and 0 to 60 mph in six seconds. Fast and indeed furious as the youngsters might say. This Mazda is not just another Japanese coupé, it is the most radical, exciting and underrated performance car ever and arguably several degrees cooler than a RX-8 and its trick doors.

As well built as a Porsche and arguably more involving than a dozen other Japanese clone coupés, the RX-7 always has been tremendous value for money. The high spinning Mazda RX-7 is where the appliance of automotive science has never been more dramatically demonstrated.


Main link: http://cars.uk.msn.com/bangernomics/article.aspx?cp-documentid=12516668

Pages: [1] 2 ... 6