PowerMods911 - GTV6 2.5 TT - Race Car

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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by Giuliettaevo2 » Sun Apr 21, 2013 3:57 am

Volvo 140 series balljoint is a bit big on the outside :( ... You need to enlarge the hole to 50mm to press that in. Might be a bit scary as there is not that much 'meat' in the original LCA.

Mecedes W114 balljoint is next for measuring...
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Sun Apr 21, 2013 10:26 am

Here are some pics and dimensions of the ball joint. I've removed the rubber boot to give us a better view. It's 44m diametre fit into the LCA. SO it leave enough meat on the LCA.
Attachments
IMG_3817.JPG
Measurement of the LCA bottom view 44mm
IMG_3817.JPG (84.64 KiB) Viewed 3694 times
IMG_3811.JPG
bottom view of the LCA
IMG_3811.JPG (113.71 KiB) Viewed 3694 times
IMG_3810.JPG
ball joint bottom view
IMG_3810.JPG (70.55 KiB) Viewed 3694 times
IMG_3808.JPG
ball joint side view
IMG_3808.JPG (71.37 KiB) Viewed 3694 times
IMG_3807.JPG
ball joint top view
IMG_3807.JPG (67.9 KiB) Viewed 3694 times
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Sun Apr 21, 2013 10:37 am

more detail on Ball Joint and LCA
Attachments
IMG_3816.JPG
top view w]of LCA with measurements were its been machined
IMG_3816.JPG (96.61 KiB) Viewed 3693 times
IMG_3815.JPG
top view of LCA
IMG_3815.JPG (118.99 KiB) Viewed 3693 times
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Sun Apr 21, 2013 10:54 am

Dimensions
Attachments
IMG_3824.JPG
Hopefully u can read this, I'm no engineer nor draughtsmanso bear with me.
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by Giuliettaevo2 » Sun Apr 21, 2013 11:18 am

That's exactly how i pictured making it.. :) Now w ejust need to know where the balljoint came from. :lol:

44mm is almost stock size, strengthwise that should not be a problem. :)

I must say my Volvo balljoint looks alot stronger due to its size. :oops: To bad the LCA won't accept it. :(
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Thu Apr 25, 2013 1:19 pm

One of the changes required will be to make the front rims a 5 hole 98PCD, currently 4 hole 98PCD. The back rims are alreadt 5 hole 98PCD. I'm concerned about the this weaking the rim structure and or the new holes being very close too or even worse encroaching on and enlargening a current hole.

Any one had expereince with this before or can give me guidance as to the do's and don'ts when attempting this. I'll sent them in to a wheel repair shop, but still I'd like your views.

The other option :idea: is to get other rims.........anyone in RSA (Jhb/Pta) area have a set of 16" either 10J or 11J 98/5. I'll manage to two rims if you don't have a set.
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by kevin » Thu Apr 25, 2013 11:42 pm

Go see Craig at Hi tech in Alberton south . Expensive but their work is thoroughly checked (x rayed etc) . Most important make sure the spigot of the rim fits perfectly on hub as this is often a cause of failure around bolts . I had new insert put in and they must be pressed in with a loctite , other wise the insert expands differently to rims and can stick on hub at race track . Also put copper on hub but very little as can get hot and liquid which runs onto caliper .
Sav also has spare inners - I think .
Post a pic of your stub axles to confuse us as that was the key to perfect set up . We never did identify those . All thought it was 119 , then 105 but maybe 750 series .
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by Mats » Fri Apr 26, 2013 1:05 am

Modifying rims from 4/98 to 5/98?

Wow, you guys are either very brave or very st***d... :wall:
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Fri Apr 26, 2013 1:42 am

Mat, we haven't figured that one out either...........which kinda starts ruling out being brave...... :oops:
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Fri Apr 26, 2013 1:55 am

Kevin, there's a mag repair place close to us, in Jules street. The option they've suggested (they showed me a race rim they were busy with) is to insert solid aluminum plugs with grooves on the side to ensure it does not turn or come off (20mm diameter) into the current holes. They drill the hole to 18.5mm and press fit the plug in. Then they drill new holes. So there is no welding, heating and coolling off, other than the machining and drilling. Yes there will be 2 holes new that will be damn close to these inserts.
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by kevin » Fri Apr 26, 2013 6:05 am

Yeah , generally as a rule I never trusted anyone in Jules street . I still think you should go see Craig at Hitech as they do all the mags for the racing industry and if there have been failures he would be first to know . This car is producing serious G ' s so as Mats said if we can limit the stupidity start with the best . They also got a ISO 9000 so at least their quality is good .
Been front rims its a less risk than having to do the rears which are already correct pcd so that's one positive . I have only seen one rim disintergrate around the hub and murphies law it happened just a I overtook a 101 series Guilietta down the mine shaft section at Kyalami . They guys steel rim had finally fatigued over the 40 years on that car . He was also running slicks on those steel rims . I ended overtaking him between the rim that just came off and his car at 140 km/h on that off camber sweep . I'm not sure who was more scared , me or Cabrita . We still laugh nervously about that incident because it could have gone horribly wrong for both of us .
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Thu May 09, 2013 12:58 pm

Suspension change out completed just in time for the week end racing.
Replaced UCA and had the cut out made bigger to accept the coil over springs.
Replaced the bush on UCA.
Replaced the LCA upside down balljoint with std GTV LCA.
Replaced lower ball joints with std GTV ball joints
Replaced the stub axle and hubs with std GTV stub axle and hubs
Changed rims from 4/98 to 5/98
Removed praggia callipers and replaced with 156 GTA calipers
Had adaptors machined to mount the calipers
Had spacers machined so the rim could clear the calipers
Replaced cracked 330mm /32mm disks with 330mm/28mm 159 disks
Replaced the steering rack with std GTV steering rack
Replaced KONI shocks with Bilstein coil over shocks
Had spigots machined to centre rim onto the spacer
Made 10mm mild steel backing plate to fit into the disks
Tack welded 90mm high tensile wheel bolts onto mild steel plate and fitted it onto the disks
Attachments
IMG_3920.JPG
Calipers fit snuggly into the rim with enough clearance allround.
IMG_3920.JPG (87.49 KiB) Viewed 3576 times
IMG_3915.JPG
Disks and calipers fitted
IMG_3915.JPG (88.56 KiB) Viewed 3576 times
IMG_3851.JPG
UCA cut out made bigger to accepte the bilstein coil over springs
IMG_3851.JPG (100 KiB) Viewed 3576 times
Last edited by PowerMods911 on Thu May 09, 2013 8:57 pm, edited 4 times in total.
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by kevin » Thu May 09, 2013 2:35 pm

That's big graft . Good going . Check braded brakes hose moves freely away from shock coils and ones not kink when full lock .
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Thu May 09, 2013 8:52 pm

You have no idea, the amount of work. There were time I was kicking myself for starting it, as there was no turning back. The sobering though of it all....when all was said and done I ended off where I started as it entailed mostly replacing of items...........the positive.......safety.......the most important aspect of all and that made it worthwhile.

Kevin, yes I did check the bradied brake pipes for clearance, had to reroute the one pipe.
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Re: PowerMods911 - GTV6 2.8 TT - Race Car

Post by PowerMods911 » Thu May 09, 2013 9:18 pm

Picture of the rim after change over from 4/98 to 5/98.
Fitted Ferodo DS2500 brake pads, couldn't get hold of DS 3000.
Braided hose was rerouted to clear the tyre and spring.
By the way I also had to have the pins holding the brake pads machined as the calipers came without the pins.
Attachments
IMG_3916.JPG
Brake pads fitted, pic taken before I rerouted the braded brake pipe to clear tyre and spring.
IMG_3916.JPG (105.69 KiB) Viewed 3560 times
IMG_3924.JPG
Rim with caliper and disk visible.
IMG_3924.JPG (104.16 KiB) Viewed 3560 times
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