So i got 94 5 lug spindles..and my question is if i went with the 94 calipers would i need to change the brak booster out? im trying to avoid messin with that..im not lookin for super brakes that why i want to keep it simple..any comments would help
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- Thread starter Beasty306GT
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Shaolin Crane
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you wont for sure have to but you are definitely going to want to, its a simple thing, drill one more hole and hook it up like normal, while you are at it you're going to want a 94 to 95 GT mc
If you do rear disk, you should really plan on the booster. The stock booster is really designed to provide assist for two disks and 2 drums. 4 disks requires more
i say it depends on which master cylinder you use. if using the stock cylinder, you'd probably be fine, but being the pistons on the 95+ brakes are bigger than a foxes, you'll probably want to upgrade that, which will then need a bigger booster.
btw, why is it everytime i edit a post or have to disable noscript, it leaves a thumbsdown in the header?
Im goin to leave the rear drum for now...if i went with 94 gt calipers would i be ok with the stock setup?
You should be.
Reason I say should is because the SN95 GT front calipers do require more fluid. They are 66mm vs stock 60mm. SO swapping the calipers on will give you a slightly softer pedal. So i'd leave the stock booster in that situation to keep assist low. You may find it perfect.
BUT, if you get your hands on a set of 99-04 GT./V6 calipers, the pedal feel will be closer to stock since they have less hydraulic surface area than the 66mm 94-98 calipers. So the feel may be just like stock.
As a comparison, these are the piston surface areas for 2 calipers total
Stock 87-93 = 5654mm^2
94-98 GT/V6 = 6842mm^2
99-04 GT/V6 = 6220mm^2
The way it works, if you keep the MC the same (master cylinder), then the work effort goes up if you decrease caliper piston size (slave cylinder) and becomes easier if you increase slave cylinder size. The booster....well...boosts. So running a slightly smaller size MC with the stock booster *might* even out
FYI, if you swap to rear disks down the road...all this changes.
Reason I say should is because the SN95 GT front calipers do require more fluid. They are 66mm vs stock 60mm. SO swapping the calipers on will give you a slightly softer pedal. So i'd leave the stock booster in that situation to keep assist low. You may find it perfect.
BUT, if you get your hands on a set of 99-04 GT./V6 calipers, the pedal feel will be closer to stock since they have less hydraulic surface area than the 66mm 94-98 calipers. So the feel may be just like stock.
As a comparison, these are the piston surface areas for 2 calipers total
Stock 87-93 = 5654mm^2
94-98 GT/V6 = 6842mm^2
99-04 GT/V6 = 6220mm^2
The way it works, if you keep the MC the same (master cylinder), then the work effort goes up if you decrease caliper piston size (slave cylinder) and becomes easier if you increase slave cylinder size. The booster....well...boosts. So running a slightly smaller size MC with the stock booster *might* even out
FYI, if you swap to rear disks down the road...all this changes.
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