vacuum psi ???? help
- Thread starter AfiRover
- Start date
right amount of psi?
a healthy engine will pull between 17 and 19 inHg of manifold vacuum (roughly, 8-10 psi) at idle.
a healthy engine will pull between 17 and 19 inHg of manifold vacuum (roughly, 8-10 psi) at idle.
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Disco Mike
Guest
ok
now I have an new (same) issue
I installed a new or rather a higher performance cam and some biger tires now my truck will not stop as well as it used to so i replaced the brake rotors and pads but alas no new results still will not stop as well as i think it should
so if any one has any ideas im all ears
thankyou
now I have an new (same) issue
I installed a new or rather a higher performance cam and some biger tires now my truck will not stop as well as it used to so i replaced the brake rotors and pads but alas no new results still will not stop as well as i think it should
so if any one has any ideas im all ears
thankyou
Hey Gary, I'm all ears too, but it's hereditary for me, as was my father & his father, too! On a serious note though, how big of tire do you have now? Discos are heavy trucks w/small brakes & tire size does make a difference. What kind of new brakes & rotors do you have? How about brake fluid, do you change it? I'm really a firm believer in changing the brake fluid every year, but I just enjoy changing fluids I guess. It seems to make Rover happy to get the attention, and I sleep better knowing my fluids are clean! Good Luck! LRW.
Mike, Gary lives in Indiana, not high enough to affect vacuum readings.
Aggressive cam will result in lower intake vacuum and lesser assist from the brake booster. But, you have to run a seriously bad-ass cam to get there. Most likely, you need to adjust to the larger tires.
Other than that, consider using the brake setup from late-years Classic, or swap in hydroboost unit from a big Caddy.
Aggressive cam will result in lower intake vacuum and lesser assist from the brake booster. But, you have to run a seriously bad-ass cam to get there. Most likely, you need to adjust to the larger tires.
Other than that, consider using the brake setup from late-years Classic, or swap in hydroboost unit from a big Caddy.
what else could it be it seems as though their is not enough friction at the wheels the peddle feels fine but it takes much longer to stop is this typical ??
measure the vacuum - the booster should be fine with at least 10 in Hg.
how big are the new wheels/tires? You shouldn't feel much of a change with 245/75-16.
how big are the new wheels/tires? You shouldn't feel much of a change with 245/75-16.
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Steve83
Guest
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bazzle
Guest
I fitted slotted rotors and standard pads to a late model Nissan Patrol (not avilable in US, in Australia)
Made a real positive difference with 35" tyres. Standard 31"
Bazzle
Made a real positive difference with 35" tyres. Standard 31"
Bazzle