Author Topic: Clive's 400 BHP Super GT RX-8 Race Car  (Read 76326 times)

Offline clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1485 on: November 11, 2017, 08:07:40 AM »
Poor little thing must come to a stop going down the straights with its little standard 1.8 engine  :))
All the best Clive

Offline Grant Monkhouse

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1486 on: November 11, 2017, 08:51:38 AM »
I bet it does wheelies once it reaches 88mph


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Offline clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1487 on: November 11, 2017, 08:28:40 PM »
OK, we may have the answer for the 12Volt spike.

My mate Philip had all the cars from the camera and worked out literally frame by frame that the car went into limp mode at exactly the same point on the track all three times, making it far too much of a coincidence.

I have not had a chance to look yet, but he believes that its steering angle that caused the issues either by a rubbing loom or the electric rack which is feed by 12volts has fed back into the ECU and caused the issue.

"However" next week my £50 steering rack MX-5 NC rack will arrive and I will strip it to convert from hydraulic to a manual rack, target is to get the car out for the track day at Brands 1st of December.   
All the best Clive

Offline rote8

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1488 on: November 12, 2017, 10:12:03 AM »
I am sure that you have more than enough technical and physical help to get this done by Brands Hatch, but if you need someone to make the tea and make encouraging noises I am available. ;D :icon_thumright:
RX of the 8 variety.
Now totally Shy, courtesy of Mazdaspeed body kit, Dotz wheels, large brake kit and custom \'bull bars\'.

Offline clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1489 on: November 12, 2017, 11:05:52 AM »
I am sure that you have more than enough technical and physical help to get this done by Brands Hatch, but if you need someone to make the tea and make encouraging noises I am available. ;D :icon_thumright:

Thanks Ray, see you at Brands which hopefully won't become your last outing after all.
You could always take it off the road and put a tow bar on your jeep and borrow my trailer just to use it for track days.   
All the best Clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1490 on: November 15, 2017, 08:41:04 PM »
You could always take it off the road and put a tow bar on your jeep and borrow my trailer just to use it for track days.

Thanks for the offer Clive, but I have knocked this issue about in an effort to find a resolve. Even with only doing a limited number of track days (four or possibly five local ones) with storage, fuel, tyres, brakes etc. Even allowing for no need to tax and insure the vehicle I am probably looking at circa 3k for the year, something I can no longer afford unfortunately.
RX of the 8 variety.
Now totally Shy, courtesy of Mazdaspeed body kit, Dotz wheels, large brake kit and custom \'bull bars\'.

Offline clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1491 on: November 17, 2017, 08:44:58 PM »
Well as they say, always learning!

Bought in an MX-5 NC hydraulic steering rack and despite sharing the floor pan with the RX-8 there's no way this would ever fit as it mounts different and is too narrow-----------game over for that idea then!

Still determined to lose weight and have a manual rack, I stripped an RX-8 rack and have made it manual  and also now understand how the RX-8 rack can steer via the steering ECU without the driver knowing !

If you look at the picture with the arrow, you will see a spiral and this runs the shaft up and down within a sleeve with ball bearing races so when the rack gets a signal from the ECU the motor can wind the rack automatically.

This spiral (arrowed)  is why with no power the steering will not self centralise and needs physically winding back on the steering wheel when there's a fault making the car undriveable

I also found that the quill shaft , whist it looks one piece is a sprung loaded two piece shaft which must be to absorb road shocks back up to the driver with no power on the rack and being forced round this could potentially have sheered leaving me with no steering at all  ???.

To convert I had a smooth bore brass sleeve turned up which fits up the end  to stop the spiral interfering (circled)

The two piece quill shaft is now welded together and I have chopped off the motor plus removed the six big magnets from inside the motor tube , dumping lots of weight  in the process.

I now have a completely manual rack that will have no fitting issues to get it back on the car:)     

At brands in December I will know if it gives me the extra driver feedback I hope I will now have.       
« Last Edit: November 17, 2017, 08:56:27 PM by clive »
All the best Clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1492 on: November 17, 2017, 08:49:45 PM »
Happy days...and saving about 60 amps load as well.

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Offline clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1493 on: November 25, 2017, 04:38:47 PM »
Been busy on the car ready for Brands next Friday.

New steering rack is fitted (just got to get the tracking done)

As the car runs cool I sheet'd off the bulk of the holes in the under tray in the quest for more downforce, however I can remove this if it starts getting warm.

Pulled the front struts off and fitted softer springs to try and get a bit more bite on the front, which will also cut down understeer.

Stuck some trade plates on and zapped it up the road / steering will take a bit of getting used to, unlike the man-draulic steering on the RX-4 you feel literally every pebble in the road!

Steering is very very positive and is light enough once on the move, yes it requires more effort but it will be much more precise on track.

More importantly whilst I only did 4 miles it was hopefully enough to say its OK because at Brands last time it was only taking around a mile to go into limp mode.

Soon as I got back and before killing the master, I code read it and got P2259, secondary air injection system but these are just loose plugs so I would expect that.

The only other two are PO108 & PO103 which indicates Maf sensor fault and I know it needs this to run so I will replace that in the week.



   
All the best Clive

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1494 on: November 25, 2017, 06:46:05 PM »
Interesting on the Maf...ive lost 2 on the westy...wont go above 4500rpm...cleaning done nothing....

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Offline Grant Monkhouse

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1495 on: November 25, 2017, 07:50:07 PM »
Clive’s going to build up some big forearms now with the Manuel rack



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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1496 on: November 25, 2017, 07:51:31 PM »
Lol is he spanish too?

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1497 on: November 25, 2017, 07:52:06 PM »
Dont worry i cant speel either...ha ha.

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Offline Grant Monkhouse

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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1498 on: November 25, 2017, 07:52:24 PM »
That was part of my Micky taking lol
Clive Manuel haynsford


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Re: Clive's 400 BHP Super GT RX-8 Race Car
« Reply #1499 on: November 25, 2017, 07:57:36 PM »
Ahh get it now...lol

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