Impreza steering rack mod

Impreza steering rack mod

Author
Discussion

wuckfitracing

822 posts

82 months

Thursday 29th January 2015
quotequote all
Yes, doing a photo write is my plan.

Hedgehopper

1,361 posts

183 months

Thursday 29th January 2015
quotequote all
I couldn't find an intermediate shaft so I had the existing one altered in length. CBS sell tube specifically to do this............

http://www.carbuildersolutions.com/uk/search?q=cds...

http://www.carbuildersolutions.com/uk/search?q=spl...





Edited by Hedgehopper on Thursday 29th January 10:12

over_the_hill

2,445 posts

185 months

Thursday 29th January 2015
quotequote all
Hedgehopper said:
I couldn't find an intermediate shaft so I had the existing one altered in length. CBS sell tube specifically to do this............

http://www.carbuildersolutions.com/uk/search?q=cds...

http://www.carbuildersolutions.com/uk/search?q=spl...





Edited by Hedgehopper on Thursday 29th January 10:12
Very useful company and web site - bookmarked

Barkychoc

7,843 posts

143 months

Thursday 29th January 2015
quotequote all
I don't want to rain on your parade but Verpoorten Technik Automotive are in the process of building new TVR Racks for Chim & Griff with all new parts including castings.

See if this facebook link works.

https://www.facebook.com/search/str/verpoorten%2bt...

Hmmm doesn't seem to when I log out.

Search for Verpoorten Technik Automotive tvr in facebook - post was on 31st October 2014









Edited by Barkychoc on Thursday 29th January 13:01

domV8

1,278 posts

120 months

Thursday 29th January 2015
quotequote all
Great news!

Hope either of these (Scooby & new parts) will provide the solution to one of the biggest TVR bugbears IMO...

smile
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phazed

17,353 posts

143 months

Thursday 29th January 2015
quotequote all
Yes, great news but for the diyers the change can be done for a few hundred pounds all in.

GTRene

11,217 posts

163 months

Thursday 29th January 2015
quotequote all
Barkychoc said:
I don't want to rain on your parade but Verpoorten Technik Automotive are in the process of building new TVR Racks for Chim & Griff with all new parts including castings.

See if this facebook link works.

https://www.facebook.com/search/str/verpoorten%2bt...

Hmmm doesn't seem to when I log out.

Search for Verpoorten Technik Automotive tvr in facebook - post was on 31st October 2014
if you then refresh the page, it works :-)

Rowge

Original Poster:

80 posts

67 months

Thursday 29th January 2015
quotequote all
Great news if you can get a new tvr rack, but after reading all the forums the tvr rack seems expensive and unreliable, so if the old design is reproduced may not be any better, so impreza rack for me , but if the new racks prove reliable and good value magic many buy one myself,

caduceus

5,778 posts

205 months

Thursday 29th January 2015
quotequote all
Rowge said:
Great news if you can get a new tvr rack, but after reading all the forums the tvr rack seems expensive and unreliable, so if the old design is reproduced may not be any better, so impreza rack for me , but if the new racks prove reliable and good value magic many buy one myself,
My thoughts also I think. The ole turd polish re the TVR rack may hold true. Do like the sound of an Impreza rack tbh. Any future niggles and a trip to the local Subaru garage is all that's needed. IMO of course.

carsy

3,011 posts

104 months

Friday 30th January 2015
quotequote all
caduceus said:
My thoughts also I think. The ole turd polish re the TVR rack may hold true. Do like the sound of an Impreza rack tbh. Any future niggles and a trip to the local Subaru garage is all that's needed. IMO of course.
Agree. you can pick up Impreza racks off ebay for next to nothing. They are proven in the reliability stakes as well. Parts are probably cheap and plentiful. I got a brand spanker for £50. I would imagine those TVR ones will be on the pricey side.

Sardonicus

15,832 posts

160 months

Friday 30th January 2015
quotequote all
carsy said:
Agree. you can pick up Impreza racks off ebay for next to nothing. They are proven in the reliability stakes as well. Parts are probably cheap and plentiful. I got a brand spanker for £50. I would imagine those TVR ones will be on the pricey side.
Trust me when I say even S/H it will be the last rack you will fit scratchchin maybe the odd track rod arm but even thats unlikely smokin

SteveSPG

2,114 posts

141 months

Friday 30th January 2015
quotequote all
i fitted a scooby rack originally to one of my cobra replicas, used it on TD's etc, never ever had an issue, and as folk say, parts (or a whole rack) are available service exchange for not much money


SteveSPG

2,114 posts

141 months

Friday 30th January 2015
quotequote all
what are you guys planning to do for track rod ends?

i drilled the steering arms for a m14 bolt, and used a rubber booted rose joint from mcgill motorsport, along with a couple high angle spacers. Using some hardened washers allowed me to move the joint up and down a few mm, and resulted in spot on geometry with nil measurable bump steer.

there was a noticeable improvement in all the bump steer and other measurements when i fitted the scooby rack, and this was improved more with the rose joints.





Rowge

Original Poster:

80 posts

67 months

Saturday 31st January 2015
quotequote all
I was going to use standard Scooby track rod ends, I have increased the length of threes on the steering arms 14mm 1.5 pitch die, believe I may have to enlarge the taper in the hub , will have a look today, must admit not expert in bump steer setting/checking? How do I check /measure if it is close? Cheers Steve

phazed

17,353 posts

143 months

Saturday 31st January 2015
quotequote all
I enlarged the tapers in the hubs to accommodate the larger track rod ends but someone told me afterwards that the correct part is available, (Topcats iirc).

wuckfitracing

822 posts

82 months

Saturday 31st January 2015
quotequote all
SteveSPG said:
what are you guys planning to do for track rod ends?

i drilled the steering arms for a m14 bolt, and used a rubber booted rose joint from mcgill motorsport, along with a couple high angle spacers. Using some hardened washers allowed me to move the joint up and down a few mm, and resulted in spot on geometry with nil measurable bump steer.

there was a noticeable improvement in all the bump steer and other measurements when i fitted the scooby rack, and this was improved more with the rose joints.
Intetesting, can you post some pictures.

SteveSPG

2,114 posts

141 months

Saturday 31st January 2015
quotequote all
wuckfitracing said:
Intetesting, can you post some pictures.
i don't think i have any, but check mcgill motorsport on eBay, the m14 rose joints, angle spacers, rubber boots all came from there, used m14 hard cap bolts through the steering arms.


I'm sure there is somewhere a TRE that works, but i wanted to use this method as it definitely improved bump steer as it was adjustable

you can use a old tvr TRE to enlarge the hole in the steering arm also, (cut the TRE apart, grind the round ball to a square shank and use a low speed drillnwith grinding paste ) if you dont have access to a taper . once the tool is in hand takes 10 mins per side.



i did find these old pics though if they help in other areas. you can see the grinding widget i made from a TRE, but rose joint is easier

on this pinion i cut a spline into it, but it was tricky, and took ages.







Edited by SteveSPG on Saturday 31st January 11:37

WinstonWolf

71,002 posts

178 months

Saturday 31st January 2015
quotequote all
phazed said:
I enlarged the tapers in the hubs to accommodate the larger track rod ends but someone told me afterwards that the correct part is available, (Topcats iirc).
I'd be interested to know which part, trying to work out a machining free solution before I commit to doing it.

phazed

17,353 posts

143 months

Saturday 31st January 2015
quotequote all
WinstonWolf said:
phazed said:
I enlarged the tapers in the hubs to accommodate the larger track rod ends but someone told me afterwards that the correct part is available, (Topcats iirc).
I'd be interested to know which part, trying to work out a machining free solution before I commit to doing it.
It was 7TVR, Chtistian who had the conversion done by Topcats.

WinstonWolf

71,002 posts

178 months

Saturday 31st January 2015
quotequote all
I guess they'd sell me the correct part, one less bit to fabricate/modify smile