Is the MMS pulley an 8 Rib ?
Thread Starter
TECH Fanatic
Joined: Mar 2002
Posts: 1,452
Likes: 0
From: toronto
Is the MMS pulley an 8 Rib ? Hey guys is the MMS Crank pulley 8 rib ?
Doesn't say on the web site
Anyone have any good pictures of it ?
It's going to go into my truck and issues with that
I'm not sure that the crank pullies are any different
thanks
Jim
Doesn't say on the web site
Anyone have any good pictures of it ?
It's going to go into my truck and issues with that
I'm not sure that the crank pullies are any different
thanks
Jim
Thread Starter
TECH Fanatic
Joined: Mar 2002
Posts: 1,452
Likes: 0
From: toronto
Re: Is the MMS pulley an 8 Rib ? With it on and a 4" pulley what kind of boost should i see shifting at 6200 rpm with my P1sc Charger any ideas ?
I'm currently getting some belt slip issues with my 3.6" pulley and i'm looking at my options
I think it's 8 Rib time ..
I'm currently getting some belt slip issues with my 3.6" pulley and i'm looking at my options
I think it's 8 Rib time ..
Moderator
Joined: Nov 2001
Posts: 3,048
Likes: 12
From: Raleigh, NC
Re: Is the MMS pulley an 8 Rib ? Pic:
Per Mike Morgan:
Here is a general rule on boost with the crank pulley.
Here are the conditionals:
1. Stock displacement.
2. D1SC supercharger
3. Boost measurements at 6200RPM
4.50" pulley- 7 to 8 psi
4.38" pulley- 8 to 9 psi
4.25" pulley- 9 to 10 psi
4.10" pulley- 10 to 12 psi
4.00" pulley- 12 to 14 psi
3.85" pulley- 14 to 16 psi
If you run a P1SC then take about 2 to 3psi off these numbers.
Here is a pulley conversion from your old to new
Pulley w/ stock crank ------- Pulley with MMS crank
3.20" - 4.25"
3.40" - 4.50"
anything bigger than 3.60" with your current setup would not require a crank pulley switch if unless you want to run more boost. I believe the 3.6" pulley is a 4 to 5 psi setup.
Per Mike Morgan:
Here is a general rule on boost with the crank pulley.
Here are the conditionals:
1. Stock displacement.
2. D1SC supercharger
3. Boost measurements at 6200RPM
4.50" pulley- 7 to 8 psi
4.38" pulley- 8 to 9 psi
4.25" pulley- 9 to 10 psi
4.10" pulley- 10 to 12 psi
4.00" pulley- 12 to 14 psi
3.85" pulley- 14 to 16 psi
If you run a P1SC then take about 2 to 3psi off these numbers.
Here is a pulley conversion from your old to new
Pulley w/ stock crank ------- Pulley with MMS crank
3.20" - 4.25"
3.40" - 4.50"
anything bigger than 3.60" with your current setup would not require a crank pulley switch if unless you want to run more boost. I believe the 3.6" pulley is a 4 to 5 psi setup.
Thread Starter
TECH Fanatic
Joined: Mar 2002
Posts: 1,452
Likes: 0
From: toronto
Re: Is the MMS pulley an 8 Rib ? My new setup will be a 372 ci iron block with some absolute 6L blower heads and a few other goodies
Gettin a custom intercooler done aswell
i just need some options on my belt setup
Guess i have to call ASP for a cutom setup ..
is there anyone else that can do it ?
Gettin a custom intercooler done aswell
i just need some options on my belt setup
Guess i have to call ASP for a cutom setup ..
is there anyone else that can do it ?
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
Likes: 0
From: Chi-Town, IL
Re: Is the MMS pulley an 8 Rib ? On my current 372 setup I'm running a ASP 7.85" 8 rib crank pulley, and a 3.3" 8 rib reichard racing pulley, I'm having problems destroying belts though, the ATI brackets are flexing, there for I'm going to have Chris Sikora (Z9's) custom fabricate something to keep the brackets from flexing....
I'm also looking into a better filter setup for the ATI, the stock supplied K&N cone is very restrictive, when taken off my car it was an instant 2-3psi gain....so I have speed Inc. hunting down a bigger cone to put on there...
I'm also looking into a better filter setup for the ATI, the stock supplied K&N cone is very restrictive, when taken off my car it was an instant 2-3psi gain....so I have speed Inc. hunting down a bigger cone to put on there...
Thread Starter
TECH Fanatic
Joined: Mar 2002
Posts: 1,452
Likes: 0
From: toronto
Re: Is the MMS pulley an 8 Rib ? The metal on the bracket I have isn't very hard it will flex when i push on the blower
I'm going to get my re-done out of real steel that's going to be a little thicker than what ati provides with the kit
this should fix any potential flex issues i'm going to have
How much did asp charge you for your crank pulley ?what are the reichard pullies worth?
BIGBOS what cam are you running ?
I'm going to get my re-done out of real steel that's going to be a little thicker than what ati provides with the kit
this should fix any potential flex issues i'm going to have
How much did asp charge you for your crank pulley ?what are the reichard pullies worth?
BIGBOS what cam are you running ?
Trending Topics
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
Likes: 0
From: Chi-Town, IL
Re: Is the MMS pulley an 8 Rib ? The 7.85" 8 rib was $275....
The RR pulleys were $160, I got a 3.6" pulley I would be willing to sell, I'm running a 3.3" now...
The 3.6 is an RR 8 rib, and its brand new....I'll let it go for $100...
I'm running a 214/218 .540/.550 114lsa, its a very mild cam, the car idles like stock....
I'm seeing about 12psi with the 7.85" crank pulley, and the 3.3" pulley....thats with the filter off....and its at 9 with the filter on...
The graphs read right around 500 for HP, and somewhere in the 600's for TQ....it hits 12psi, then just drops flat as the belt gets demolished...
I would be happy with around 520-540rwhp...I have a TH400 with a non locking 3500 converter, 12-bolt, and dynoing on 27" Hoosiers...
The RR pulleys were $160, I got a 3.6" pulley I would be willing to sell, I'm running a 3.3" now...
The 3.6 is an RR 8 rib, and its brand new....I'll let it go for $100...
I'm running a 214/218 .540/.550 114lsa, its a very mild cam, the car idles like stock....
I'm seeing about 12psi with the 7.85" crank pulley, and the 3.3" pulley....thats with the filter off....and its at 9 with the filter on...
The graphs read right around 500 for HP, and somewhere in the 600's for TQ....it hits 12psi, then just drops flat as the belt gets demolished...
I would be happy with around 520-540rwhp...I have a TH400 with a non locking 3500 converter, 12-bolt, and dynoing on 27" Hoosiers...
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
