new holley

ragnar · 10-28-2007, 08:09 PM

hi im not sure if this is double posting as i have posted another question today. (if so im sorry) i just put a new 750 holley on today and i hooked up the vaccume advance on the distributor and the vaccume to the brakes but there is another vaccume port in front of the throttle body what does this go to? also to hook up the modulator vaccume on my th 400 do i hook that directly to the nipple coming off my manifold behind the carb? thanks in advance!

scavanger · 10-28-2007, 08:58 PM

Trans modulator line goes direct to intake. Most of the time the dist advance is hooked to a port above the throttle plates. I have hooked them to intake but you could get some pinging doing that . I would have to guess that the port on the throttle plate is for the dist. advance.

scavanger

tjzz4 · 10-28-2007, 09:34 PM

The one on the front of the plate is for the PCV valve if it`s a 3/8 hose fitting.

ragnar · 10-29-2007, 12:42 AM

the one on the side by the choke cable lock is for distributor its labled, but thanks for the info got all i need now. unless someone can tell me how i can get wheel lifting launches out of a 350 in my truck??????????

ragnar · 10-29-2007, 10:36 AM

oh i have a 750 holley on my 350 chevy and when i nail it it falls on its face, is this because the carb is too big?

bradrhale · 10-29-2007, 11:30 AM

if you have a 350 that has not been bored or nothing done to the heads, 750 is alot more than that engine requires. cant tell you exactly if that is your problem as i do not know what all you have.

ragnar · 10-29-2007, 02:00 PM

the 350 is a standard bore with flat top pistons, full length race headers flowmaster 40 series mufflers and thats about it

tjzz4 · 10-29-2007, 02:07 PM

650 cfm is plenty for that set up.

ragnar · 10-29-2007, 03:18 PM

will a 650 still do once i get my weiand stealth air strike intake,and some roller rockers?

tjzz4 · 10-29-2007, 05:11 PM

650 should be good up to around 350 horse or so on a small block. Unless you go to a stroker with big heads it should be fine.

10-28-2007, 08:09 PM	#1
ragnar Full Member Join Date: Oct 2007 Posts: 52	new holley hi im not sure if this is double posting as i have posted another question today. (if so im sorry) i just put a new 750 holley on today and i hooked up the vaccume advance on the distributor and the vaccume to the brakes but there is another vaccume port in front of the throttle body what does this go to? also to hook up the modulator vaccume on my th 400 do i hook that directly to the nipple coming off my manifold behind the carb? thanks in advance! __________________ Cash, Grass Or Gas, No One Rides For Free !!!!!

10-29-2007, 12:42 AM	#4
ragnar Full Member Join Date: Oct 2007 Posts: 52	the one on the side by the choke cable lock is for distributor its labled, but thanks for the info got all i need now. unless someone can tell me how i can get wheel lifting launches out of a 350 in my truck?????????? __________________ Cash, Grass Or Gas, No One Rides For Free !!!!!

10-29-2007, 10:36 AM	#5
ragnar Full Member Join Date: Oct 2007 Posts: 52	oh i have a 750 holley on my 350 chevy and when i nail it it falls on its face, is this because the carb is too big? __________________ Cash, Grass Or Gas, No One Rides For Free !!!!!

10-29-2007, 02:00 PM	#7
ragnar Full Member Join Date: Oct 2007 Posts: 52	the 350 is a standard bore with flat top pistons, full length race headers flowmaster 40 series mufflers and thats about it __________________ Cash, Grass Or Gas, No One Rides For Free !!!!!

10-29-2007, 03:18 PM	#9
ragnar Full Member Join Date: Oct 2007 Posts: 52	will a 650 still do once i get my weiand stealth air strike intake,and some roller rockers? __________________ Cash, Grass Or Gas, No One Rides For Free !!!!!

10-28-2007, 08:58 PM	#2
scavanger Senior Member Join Date: May 2007 Posts: 262	Trans modulator line goes direct to intake. Most of the time the dist advance is hooked to a port above the throttle plates. I have hooked them to intake but you could get some pinging doing that . I would have to guess that the port on the throttle plate is for the dist. advance. scavanger

10-28-2007, 09:34 PM	#3
tjzz4 Senior Member Join Date: Oct 2007 Posts: 277	The one on the front of the plate is for the PCV valve if it`s a 3/8 hose fitting.

10-29-2007, 11:30 AM	#6
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	if you have a 350 that has not been bored or nothing done to the heads, 750 is alot more than that engine requires. cant tell you exactly if that is your problem as i do not know what all you have.

10-29-2007, 02:07 PM	#8
tjzz4 Senior Member Join Date: Oct 2007 Posts: 277	650 cfm is plenty for that set up.

10-29-2007, 05:11 PM	#10
tjzz4 Senior Member Join Date: Oct 2007 Posts: 277	650 should be good up to around 350 horse or so on a small block. Unless you go to a stroker with big heads it should be fine.

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