blower pulley size charts
#1
Registered
Thread Starter
Join Date: May 2002
Location: istanbul
Posts: 1,580
Likes: 0
Received 0 Likes
on
0 Posts
blower pulley size charts
using 8-71 weiand ; need to know the psi's
what size pulleys do i have to use to receive 6 and 8 psi?
top?
bottom?
any www showing charts about pulley size?
8mm
bb
thnx
what size pulleys do i have to use to receive 6 and 8 psi?
top?
bottom?
any www showing charts about pulley size?
8mm
bb
thnx
#6
Registered
Join Date: Dec 2003
Location: Los Angeles California
Posts: 8,306
Likes: 0
Received 2 Likes
on
2 Posts
Re: blower pulley size charts
Originally Posted by timucin
509 cu.in
8-71 blower
-3.7 % under drive
6000rpm max
boost?
8-71 blower
-3.7 % under drive
6000rpm max
boost?
Regardless of the RPM... if the throttle is wide open ... the boost remains the same all through the RPM range.
#7
Registered
Join Date: Dec 2003
Location: Los Angeles California
Posts: 8,306
Likes: 0
Received 2 Likes
on
2 Posts
Re: blower pulley size charts
Somewhere in my huge stack of catalogs ... I have a BDS catalog... and there is a chart that shows approximate compression ratios and boost figures with a chart showing cubic inches and size of blower and ratios... My guess is with a 8-71 being underdriven on a 502 cubic inch engine... you are going to get about 3 lbs of boost. I can't find the catalog and the BDS site doesn't show it... sorry... that is the best I can do is guess at what boost you will have... I had a 10-71 blower on 540 cubic inches ... driving the blower 1to1 and I had 5 lbs of boost.
#8
Registered
Re: blower pulley size charts
If your running a intercooler depending on which one
you have to add approx 2lbs for the restriction.
Heads, cam duration and compression play a major role.
For instance I run 540 Merlin cast Iron Fully ported heads crane 741 cams
10-71 Richard lee intercooler. I am 10.6% overdriven and get 7lbs. at
5000rpm.
you have to add approx 2lbs for the restriction.
Heads, cam duration and compression play a major role.
For instance I run 540 Merlin cast Iron Fully ported heads crane 741 cams
10-71 Richard lee intercooler. I am 10.6% overdriven and get 7lbs. at
5000rpm.
#9
Registered
Thread Starter
Join Date: May 2002
Location: istanbul
Posts: 1,580
Likes: 0
Received 0 Likes
on
0 Posts
Re: blower pulley size charts
-3.7% under drive means the blower pulley is turning 3.7 percent slower than the crankshaft pulley.
yep i know this
there has to be a chart showing the boost levels according to pulley ratios
like 8.71 makes X psi of boost on top of 509.
i had this cart but i lost..
yep i know this
there has to be a chart showing the boost levels according to pulley ratios
like 8.71 makes X psi of boost on top of 509.
i had this cart but i lost..