SouthernGT No6

Hi Nick,
I’ve not come across any oval rubber blanking plugs. Either open it up to the next commercially available size, or make a aluminium cover plate retained with a couple of screws<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
Rgds,<o:p></o:p>
Andy<o:p></o:p>
 
Hi Nick,
make a aluminium cover plate retained with a couple of screws<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
Rgds,<o:p></o:p>
Andy<o:p></o:p>

Thanks Andy,

I'd opted for aluminium cover, held on with double sided tape for the moment :).

More IVA stuff done, temporary wing mirrors, front indicators, square wheel nuts, rear clip cover, and side repeater indicators, also started wire locking bolts bereft of a secondary locking device.
 

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Took the car to Ric Wood Motorsport yesterday to try to get to the bottom of the misfire.

The good news is Ric found another 40 plus horsepower from it's dyno test so now running 370hp. He thinks it will be closer to 400 when I have sorted out my pedal box and throttle cable issues as he could only get 3/4 throttle.

The bad news is it has not fixed the misfire, he also wasn't impressed with my car / engine building ability, and thinks I may have made a "mistake" setting up the hydraulic lifters so suggested taking the inlet manifold off and starting again. Followed by checking the float levels, junking the facet red top fuel pumps and regulators and replacing them with holley ones. Finally sorting out a decent throttle cable and beefing up my pedal box.

Hoping the guys in the northern section will come to my aid with setting up the lifers and float levels as I now feel way out of depth on such issues.

The disastrous news, went to move the car off the rolling road and it would not budge. To cut a long story short it looks like the back offside wheel bearing has seized solid.

Every cloud has a silver lining, who in this case turned out to be Mike Pass. He had popped down to spend a relaxing few hours, having a look at things. He then spent literally hours with me man handling the car back onto the trailer with a combination of jacks and car dollies and inch by inch process, involving literally lots of sweat.

He then followed me back to my house to help me get the car off the trailer and into the garage. "I could not have done it without you", is an often used saying but in this case it is 100% correct, I really could not have done it without him, and the consequences of that do not bear thinking about.

So IVA has moved way into the distance, and at the present moment I am at my darkest hour, a real cross roads, carry on or give up. Head says give up as I obviously don't have the skills required, heart says to much time and money spent to give up, presently some poor unfortunate souls in Italy along with many others around the world know what a disaster really is, keep calm and carry on, and I have 370hp which is way more than my driving skills and experience require :)

Thanks again Mike the single handed cavalry man who came riding over the hill.
 
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Keith

Moderator
Hang in there mate. 'Tis but a temporary hitch. You'll be moving forwards again really soon. There's always some fettling to do, even on the best builds..:thumbsup:
 

Mike Pass

Supporter
Yep. Moving a GT40 with a totally locked up rear wheel onto and off a trailer and then into a garage is a royal pain in the arse. However the engine is fundamentally healthy and should do over 400hp once the throttle and tappet issues are sorted. I am sure that it will go a lot better with with 400hp than two donkey power!

Cheers
Mike
 
Hi Nick,
These are all character building attributes and will all be part of the story you can tell when it’s all finished and on the road. You’re so close now and it’s better to find out issues now and is all part of the development process. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
Keep at it, you’ll have 400hp to learn to tame and I want to see the car at Classic LeMans in 2018<o:p></o:p>
Rgds,<o:p></o:p>
Andy
 
Hi Nick,
Are you sure it’s the wheel bearing that’s seized? A local Southern GT builder (ffice:smarttags" /><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com
><st1:PersonName w:st=
Neil Johnson</st1:personName>) had one of his rear wheels lock up on his first road test, but it was caused by the brake caliper bracket failing and the caliper then jamming the wheel.

Just a thought<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
Rgds,<o:p></o:p>
Andy
 
Hi Nick,
Are you sure it’s the wheel bearing that’s seized? A local Southern GT builder (ffice:smarttags" /><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com
><st1:PersonName w:st=
Neil Johnson</st1:personName>) had one of his rear wheels lock up on his first road test, but it was caused by the brake caliper bracket failing and the caliper then jamming the wheel.

Just a thought<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
Rgds,<o:p></o:p>
Andy

Thanks Andy will check it out when I can.

Nick
 
Well it's not the brake calliper as that came off with no problems, so that leaves gearbox or most likely with my limited knowledge the bearing seized.

They had a length of scaffold pole to try to get the half shaft nut off but it would not budge, hope they were turning it the right way.

So next step is to get the hub carrier, looks like with the half shaft attached back to SGT for an exchange.
 
Hi Nick, You might be joking about turning it the right way but I bought some hubs etc from Furbers near Market Drayton a few years ago and the guy who removed them didn't realise one side thread was the opposite way and stripped it completely. I don't know how he managed to do it, Kev
 
Hi Nick, You might be joking about turning it the right way but I bought some hubs etc from Furbers near Market Drayton a few years ago and the guy who removed them didn't realise one side thread was the opposite way and stripped it completely. I don't know how he managed to do it, Kev

Hi Kev,

Wasn't as they didn't realise they were opposite thread at first, was a bit flumoxed at the time so can't remember if it was the hub or wheel nut they where trying to undo the wrong way at the time, I'll have to ask Mike Pass he will remember.
 
More of the cavalry have arrived :)

From: Mick Sollis
Sent: Mon, 29 Aug 2016 18:28

HI Nick don't let things get you down it will be alright in the end if you look at the outer edges of The hex nut and it has a small groove around the middle of it it's left hand.If you need anything sorted send it to me and I will help .Regards mick.
 
Mick at SGT solves the problem the thickness of the wall as shown on the arrow is to great and needs to be thinned down. How could this have happened I hear you cry, or not as the case may be.

Well thinking about it, I was the third owner of my chassis it had gone through 2 others without much being done. When I got it it went back to SGT to have the chassis drilled and altered for a Porsche G50 gearbox. I believe the original gearbox spec was for a Renault one.

As the uprights came with the chassis they to would have been for Renault splines bearings and halfshafts. These are not as wide as the Porsche ones so there can be more "meat" on the casting around them.

So Bob is not your auntie and the mystery is solved, as will soon be rectified. Don't know why everyone was panicking ;)
 

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Mick at SGT solves the problem the thickness of the wall as shown on the arrow is to thick and needs to be thinned down. How could this have happened I hear you cry, or not as the case may be.

Well thinking about it, I was the third owner of my chassis it had gone through 2 others without much being done. When I got it it went back to SGT to have the chassis drilled and altered for a Porsche G50 gearbox. I believe the original gearbox spec was for a Renault one.

As the uprights came with the chassis they to would have been for Renault splines bearings and halfshafts. These are not as wide as the Porsche ones so there can be more "meat" on the casting around them.

So Bob is not your auntie and the mystery is solved, and will soon be rectified. Don't know why everyone was panicking ;)
 
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Hi Nick,
<FONT size=3>I think what Mick has offered is a plausible answer, but it doesn’t answer the question what happened when it was on the rolling road to cause it to lock up and why it was one side only? <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
P><FONT face=Calibri><P style=
Both hubs need stripping & rebuilding to gain confidence it won’t happen again. Another character building exercise!!<o:p></o:p>
Rgds,<o:p></o:p>
Andy<o:p></o:p>
 
Hi Andy the reason this happened was because there was no room for expansion between the outer diameter of the splined shaft and the alloy upright Both uprights are being machined to correct this and all parts will be checked and re assembled.
Regards Mick.
 
I had a very similar problem, self inflicted, when fitting one piece aluminium race wheels and full size AP brake calipers to a GT40. In the shop I had worked perfect clearances to get the maximum sizes inside the wheels, feeler guage checks showed everything cleared, looked good ! Until the driver had done just a few laps and complained that there was something rubbing in the hubs, 25 thou clearance is not .25 of an inch, and I had failed to appreciate just how much hot aluminium expands, particularly two adjacent parts growing together. Luckily a big file on the calipers solved the immediate problem, and I learnt yet another lesson . Frank
 
Machined parts received back from Mick and fitted. Now to try and sort out the intermittent backfire.
 

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