[JustinS]

Wanted to see if anyone out there has a smaller pully on there AED bird, or know of a place to purchase one. I have called a few places including AED for alittle help in finding a smaller pulley (10lbs). Or if any one know the measurments of the pully? Any help greatly appericated. Thanks

 

[Dr. FrankenCougie]

Smaller Pulley+Stock motor=Boom (not the movie set kind)

Dr. F

 

[MagerThom]

Justin......

A number of people have run smaller pulleys. In fact I plan
on putting an 8# pulley on my setup in the not too distant
future. Realize though that ANY setup materially increases
your chances of some kind of failure whether it's six, eight,
or 10 lbs.

The history of the AED setup (so far) shows that a 6 lb setup
along with careful tuning (usually by "you know who") gives
the engine a reasonable chance of living some, if not
many, tens of thousands of miles, though, of course, there are
no guarantees. When you move to an eight lb pulley maintaining
a safe A/F ratio becomes even more critical along with the fact
that steep and long advance curves are not long life friendly.
Ideally, going with at least forged pistons and rods would be
very helpful in maintaining engine life - and, my guess. may be
almost mandatory on an engine running 10 lbs of boost (or more).

If your 'Bird is your daily driver and you don't have some form
of a "beater" at least to fall back on....I would suggest not
going with a 10 lb pulley on a stock internalled engine.

A-Train has "been there and done that" and earned the Tee shirt.
So if you want to hear real life experiences about running
boost above 6 lbs on a "stock" engine, check with him. I assume
you know you can run an 8 lb AED Mustang pulley on an AED 'Bird,
if that's what you want to do.

Good luck,

 

[JustinS]

Right now im just about finished with my 00 motor it has a built bottom end with eagle rods, JE pistions, and a couple more goodies. So with a good tune which is going to be nesscary to get the motor running right, and if done right 10lbs. wont be to bad. Will AED sell a 8lb pulley? I have talked with them a couple of days ago and failed to mention it. But I know there are a couple of peopole running around here running 10lbs, I was just curioius in where you go about purchasing one.Thanks

 

[MagerThom]

According to a conversation I had....

with Jim Sanborn a couple of weeks ago....yes, they will
sell you the "Mustang" pulley. Those 10 lb pulley's
MAY have been made by ASP on special order....but I'm
not sure.

Have fun!

 

[GreenBird]

OR.....

You could use a SC pulley. I beleive they have the same number of grooves.

There are:
89-93 pulley
94+95 pulley

5% and 10% for each kind. the % is determined by the pulley diameter.

 

[JustinS]

a little help....

now with ASP you wouldnt know the websit for them would you? I had awhile back but cant find it? If i went with them are there any dimensions that I would have to let them know? size, the snout size??? Does anyone know for sure it a SC pulley would work?? How does the 5%-10% thing work.Thanks for the help. By the way MagerThom your car looks great.

 

[MagerThom]

Thank you for..

your nice comment...it is appreciated.

As GreenBird suggests- you might be able to
use an SC pulley, I really don't know. You
might check with Jim Sanborn at AED.

The pulleys made a while back, if I recall
correctly, were a special multiple order - how
many were made I don't know. You might check
with ASP - here's their link:

http://www.aspracing.com/intro.htm

You might also try:

http://www.magnuson-products.com/

who services the Eaton blower, maybe they might
have the pulley you want or, at least, know a
customer (reseller) that does.

Good luck!

 

[A-Train]

Oh boy...we are full of bad info...

Justin,

First, you can get the smaller blower pulley from either AED or Auto Specialties Inc. Second with forged internals you can safely run 10 psi of boost on your application provided you run a safe A/F ratio. The boost will be dependent on how much restriction you have, not how much air the blower is flowing. You don't want boost since it means heat.

Third, I ran the smaller pulley on my stock 1995 ROMEO engine and it let go about 6 months after I installed it. I took out the #2 ring land on my piston. EECDOC has run his smaller blower pulley for longer than I have but his is not a daily driver (like mine is). To this day he runs the factory long block ROMEO 4.6L with the AED kit. With stock heads, cams and bottom end he makes 308 RWHP and 390 RWTQ and that takes him through the 1/4 mile in 12.69 seconds at 107.70 mph.

In your case, with a good tune, you will BE FINE.

Mager,

4th, who is Jim Allen? Jim Sanborn is what you should have said. Allen is his middle name, by the way. Eaton makes the superchargers, Magnuson services them.

Greenbird,

I'm pretty sure you cannot use the '90-'95 SC pulley to spin the blower faster with the AED kit. But what do I know?

Justin,

You need a pulley from supercharged GM car (i.e. the old Buick) and the p.n. is EA85681. When you install the new pulley (whichever you decide) use locitite on the threads and torque the bolt to 50 lb-.ft. Also swap to a shorter belt to keep the tensioner in check. If you don't the belt will slip at WOT. I know, I had this problem. The AED belt it 111.8" long (hence the p.n. JK6-1118). Try using a belt in the 110.5" range. It works well with the smaller pulley.

A-Train

 

[MagerThom]

Thanks Tony.....

I MEANT Jim Sanborn ....gotta stop smoking all that crack,
it's getting to my brain.....also thanks for the info on
Magnuson, I had wrongly ASSUMED that they were licensed to
manufacture the Eaton design...Thanks also for the other
info, I learn something new every time you post.

 

[JustinS]

thanks...

Looks like i will be giving ASP a call tomorrow! Let me just get this straight the pulley EA85681 is the 10lb pulley. Correct? Anyway thanks for evryones help, Atrain comes through again. Thanks

 

[A-Train]

No...

No...
Justin,

That is incorrect. The pulley's size does not equal boost #'s. I had that pulley on my car and I made 9.5 psi of boost. I also ran 13.37 @ 103 mph. EECDOC has the same pulley and sees 8 psi of boost and runs 12.69 @ 107 mph.

Boost is JUST backpressure or a measuement of how much restriction you have. If you want 10 psi of boost on your gauge, you'll have to use a restrictive exhaust and open the inlet tube up. If that is what you want.

Remember boost goes up when you open the inlet side and boost drops when you open the exhaust side.

Now the p.n. I gave you is for the GM pulley that is removable with a puller. Later on, Eaton changed the design of the blowers so the snout has to be removed and the pulley has to be removed via a press. The new Lightning and '03 Cobras are like this. Our AED kit uses the old style changable pulley snout. You could widdle a pulley the size of a dime and slap it on there. The blower would last a minute, but you'd see lot's of "boost".

Call ASP or AED and order a pulley.

A-Train

PS There is also a 2.0" diameter pulley out there, but I'm not telling the source. Let me know if you want to make serious power with your AED kit. I have some parts that will help you.

 

[JustinS]

I get it

Thanks for explainging it out. I sent you an email.