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Old 11-08-2010, 03:21 PM   #1
isaacf
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Join Date: Sep 2010
Location: portland oregon
Posts: 108
i swapped my engine now no brakes

i swapped my engine now no brakes. i took out my 265 hp 327 and put in a 400hp327 and now have no brakes. i hooked up the brake booster and all the vacuum lines im getting alot of vacuum on the booster then when you take off the vacuum hose off the booster you can hear it relase pressure.

what could it be
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1969 chevelle 350 numbers matching
1971 chevy lifted 4x4 (the break up build) http://67-72chevytrucks.com/vboard/s...d.php?t=423605
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Old 11-08-2010, 03:44 PM   #2
Indyuke
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Location: Lake Stevens, WA
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Re: i swapped my engine now no brakes

Have you double checked your routing and made sure the check valve isn't on backwards?

What is the manifold vacuum in Hg right now? If you put a big lumpy cam in that engine to make that much power, you might not have enough vacuum to run your booster.
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Old 11-08-2010, 04:20 PM   #3
isaacf
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Re: i swapped my engine now no brakes

yes i have i am getting vacuum of 15 but just found a leak around the carb base im getting another gasket now
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1969 chevelle 350 numbers matching
1971 chevy lifted 4x4 (the break up build) http://67-72chevytrucks.com/vboard/s...d.php?t=423605
1993 subaru impreza
1969 blazer cst 8" lift
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Old 11-08-2010, 05:09 PM   #4
isaacf
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Location: portland oregon
Posts: 108
Re: i swapped my engine now no brakes

ya it wa my carb base gsaket
__________________
1969 chevelle 350 numbers matching
1971 chevy lifted 4x4 (the break up build) http://67-72chevytrucks.com/vboard/s...d.php?t=423605
1993 subaru impreza
1969 blazer cst 8" lift
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