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How to adapt the VT Master Cylinder to early model Commodores

Started by RB30-POWER · 13 Apr 2008 · 339 replies

Preserved from CalaisTurbo (partial recovery). Original authors and dates are shown; archived members are not current Holdcom accounts. View original archive ↗

HardcorzArchived member
no leaks after 6 months, ill keep an eye on it, but its screwed up tight. I had to panel beat the section directly under the booster as its a slightly larger diameter, If you do it properly and give it a quick respray in that area, you shouldn't even notice it. heres my photos: http://i88.photobucket.com/albums/k1...0052008862.jpg (http://i88.photobucket.com/albums/k181/Hardcorz/10052008862.jpg) http://i88.photobucket.com/albums/k1...0052008863.jpg (http://i88.photobucket.com/albums/k181/Hardcorz/10052008863.jpg) (And Yes the strut bracket is installed!)
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calaisv8Archived member
thanks for the photo's champ ill try pull it of Some original photos have not been recovered yet.
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HardcorzArchived member
dont forget to drill a hole in the rod that connects to the pedal as ppl have mentioned before, otherwise the brake pedal sits about 2 inches higher than the accelerator pedal.
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calaisv8Archived member
Quote: Originally Posted by Hardcorz dont forget to drill a hole in the rod that connects to the pedal as ppl have mentioned before, otherwise the brake pedal sits about 2 inches higher than the accelerator pedal. haha true how far back from the excisting hole do you drill the new one?
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HardcorzArchived member
only need a mill back behind the existing hole, there is no pressure on that side of the hole as it only pushes the rod in, doesn't get pulled out. IT will sit about level with the accell pedal when its done, I wouldn't drive it without it done, too awkward. ______________ (_OO________ <- as in my crappy drawing here.. You will also need to cut off the overhang through the middle of the first hole, otherwise it will interfere with the bracket under the dash. BTW: The stopping power is awesome, I can stop soooo much better without locking up. one of the best things i ever done to my car.
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calaisv8Archived member
Quote: Originally Posted by Hardcorz only need a mill back behind the existing hole, there is no pressure on that side of the hole as it only pushes the rod in, doesn't get pulled out. IT will sit about level with the accell pedal when its done, I wouldn't drive it without it done, too awkward. ______________ (_OO________ <- as in my crappy drawing here.. You will also need to cut off the overhang through the middle of the first hole, otherwise it will interfere with the bracket under the dash. BTW: The stopping power is awesome, I can stop soooo much better without locking up. one of the best things i ever done to my car. haha mad pic bro thanks for that made things alot easier yeah i could imagine how good it will be i owned a vt before the vl the only thing i liked about it compared to the vl is the brakes even in the big titanic vt's they pull up real good Some original photos have not been recovered yet.
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Geoff.WArchived member
Quote: Originally Posted by Hardcorz hey all, my old NA brake booster died so i just finished putting in a complete vt-vx booster & master. It fits with only a coupla mods, I had to mod the bracket, drill a hole in the rod for the pedal, and slightly panel beat under the booster. I might put some pics up later if anyone is interested. all up cost - $100 including fluid,master cyl & booster. I champ im looking in to do this mod myself but im wondering what mods u have done to the bracket for tha booster i understand what u have done with the rod for the pedal but have u welded the vl bracket onto tha vt booster or just modifed the vt one. thanks heaps geoff
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b1ancardiArchived member
theres a bolt for the booster behind the steering column. How the farrrrrrrrrrrrrrrrk do I unscrew the lil *******?
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calaisv8Archived member
dude its a pain in the ass the first time ive done it heaps now got easier undo the two screws for the steering colum just behind were the indicator part is the colum should drop so u can get to it much easier then get upside down lol get a socket and a socket extension part its about a 12mm screw just exactly above were the steering colum goes through the firewall
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88 ChaserArchived member
Meh, use 1/4 drive with a few long extensions, you will get it straight on.
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b1ancardiArchived member
I borrowed some tools off a mechanic mate .......... VT master/booster is all in now. I'll bleed the brakes tomorrow. I'll let ya know how it is. My tiling tools apparently werent the greatest selection of tools meant for doing this work, lol
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VLTommaArchived member
iv been told i need to raise my brake pedal up if i wanna pass the pits and im sick of adjusting the handbrake cable atm the brakes only start working once youve pushed the pedal about half way down, the brakes work fine though thanks Tom
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WizbikiArchived member
Whats the difference between the vt and vs master cylinder? I got a vt one from the wreckers but i think hes given me a vs. Would it make much difference to performance?
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RB30-POWERArchived member
vt is a 1 and 1/4" fast fill design, which relates to the peformance aspect of it. vs is no good for the application.
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WizbikiArchived member
Anyone know how to tell the difference between a vs and vt master cylinder. Mine looks identical to the one in the first post.
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golumArchived member
Anyone got any new pictures of There VT Booster Installed Just got a Vt Brake setup given to me and wanna install it all Brakes Booster Ect !
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Lazza78Archived member
i fitted the vs booster and vt master cyl 2 weeks ago and its the best move i have made... it pulls up very very easily now... was a little touchy at first to get use too
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5spdvlArchived member
Quote: Originally Posted by Wizbiki Anyone know how to tell the difference between a vs and vt master cylinder. Mine looks identical to the one in the first post. AFAIK Wizbicki the VS one should have a size stamped on it, but I am going from memory.
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2rardiggaArchived member
if you are worried about possible leaks fom lines with not using the adaptors find someone who installs heat pumps for a living they have a tool that reflares and seats lines correctly if you ask nicely they may do it for you for nothing absolutly no chance of leaks takes about 5 minutes of there time hop this helps
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darkstarArchived member
Great article and mod Some original photos have not been recovered yet.
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