i swapped my engine now no brakes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

isaacf · 11-08-2010, 03:21 PM

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

Indyuke · 11-08-2010, 03:44 PM

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.

isaacf · 11-08-2010, 04:20 PM

yes i have i am getting vacuum of 15 but just found a leak around the carb base im getting another gasket now

isaacf · 11-08-2010, 05:09 PM

ya it wa my carb base gsaket

11-08-2010, 03:21 PM	#1
isaacf Registered User 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 __________________ 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

11-08-2010, 03:44 PM	#2
Indyuke Registered User Join Date: Feb 2008 Location: Lake Stevens, WA Posts: 623	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.

11-08-2010, 04:20 PM	#3
isaacf Registered User Join Date: Sep 2010 Location: portland oregon Posts: 108	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 __________________ 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

11-08-2010, 05:09 PM	#4
isaacf Registered User Join Date: Sep 2010 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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