Has anyone here put one of the smaller pulleys on an M62?

What size? How much boost did you end up with?

Did you need to replace the serpentine belt, or did the tensioner pick up enough of the slack?

I'm thinking of trying out the 2.75" one, but am tempted towards the 2.6" or even the 2.4" ones.

Dan

Anyone? Anyone?

Bueller? Bueller? Bueller? Bueller?

The only source I know of is SCperformance, and their website is being updated. Having trouble getting them to return their calls.

Here'* what I know:

The only size available for the M52 is 2.25". The stock pulley is 2.75. The new pulley requires a new belt, and I believe it comes with the pulley. It'* about 90 bucks US for both. It should (from the posts I've read) give about 20 horsepower, which would work out to about 2 more pounds of boost at WOT. I'll keep you posted if I ever get mine ordered. They're supposed to call me back on my Cell now.

The number, if you're interested is (443)255-9059.

Pulley boys lists pulleys for the M62 for use in other cars, but I believe our nosedrive and stock pulley size are different.

======================================

Despite repeated calls to SCperformance, I never was able to get in touch with anyone there. You've had better luck, I guess

2.75" is stock? Are you sure? I had taken a quick measurement of mine at 3".

Perhaps you have an earlier SC? I think they came with a smaller pulley, from the information I was able to dig up, it was 66mm, which is very close to 2.60".

That would, however, explain your extra boost from the water injection

Anyway, here'* my correspondence with pulleyboys...

============================================

Hi Daniel,

I believe that Series I engines came stock with a keyed style pulley and any
pulley from our "Keyed M62" (TRD etc) line will fit. I suggest trying the
next size down, the 2.75".

Thank you for your inquiry,

--
Brian Wicklund
Pulley Boys
www.pulleyboys.com

===========================================

----- Original Message -----
From: "Culkin, Daniel R"
To: <info@pulleyboys.com>
Sent: Tuesday, December 03, 2002 12:43 PM
Subject: M62


> Hello,
>
> I'm hoping you could give me some information on a smaller sized pulley
for
> my car.
>
> It'* a 1995 Bonneville SSEi, with the 3.8L supercharged motor. It
currently
> has a 3" pulley on an M62 (it'* a series 1 engine), and is pretty steady
at
> about 7-7.5 psi.
>
> While you don't have the 95down GM listed, I noticed you do do have a
> variety of pulleys for M62s, for TRD and Nissan.
>
> My questions:
>
> #1 Do you offer pulleys that will fit my 95 Bonneville?
>
> If so,
>
> #2 What sizes are available, and what boost level can I expect from each?
>
> #3 What is the price?
>
> Thanks very much for any information you can provide.
>
> Take care!
>
> Dan Culkin
>
>

Hi Daniel,

I believe that Series I engines came stock with a keyed style pulley and any
pulley from our "Keyed M62" (TRD etc) line will fit. I suggest trying the
next size down, the 2.75".

Thank you for your inquiry,

--
Brian Wicklund
Pulley Boys
www.pulleyboys.com

===========================================

If this is true, it would mean that the toyota TRD pulleys are a match for us series 1 guys.

Check this out:

http://www.toysport.com/New%20Produc...erchargers.htm

They flow enough such that they need a 2.6" pulley to maintain 7psi. They also show that a 0.2" difference in pulley size amounts to 1psi of boost.

0.2" pulley size difference should mean more than 1psi of boost difference to us, then, since we don't flow as much. I could guesstimate then that a 2.75" pulley would yield an 8.5psi-9psi boost, and a 2.60" pulley would yeild probably a 10psi.

When I say these numbers, I'm not including the little creep that comes up in the higher RPMs. Including that, the 2.75 pulley may see 10.5-11psi, and the 2.6 maybe 12psi+. I'm not sure I'm comfortable pushing 12+ psi on my car, it'* at 135K now ... I'm thinking I may try out the 2.75.

Dan


OPTIONAL: Super Chargers Pulleys

Pulley Size
Max Boost
Max HP @6000 rpm*
Max Torq. @4400 rpm*

2.00
10.00
343
373

2.20
9.00
332
362

2.40
8.00
320
350

2.60
7.00
310
339

2.80
6.00
298
316

3.00
5.00
287
294

3.20
4.00
276
271

3.40
3.00
264
260

3.60
2.00
253
249

BOLD FIGURES shows stock kit setting. *all figures represent at flywheel

















PART NUMBER
APPLICATION
MSRP*

00646-17620-303
97-00 Camry V6, Manual Trans
$3700.00

00646-17620-304
97-00 Camry V6, Auto Trans
$3700.00

00646-17620-301
99-00 Solara V6, Manual Trans
$3900.00

00646-17620-302
99-00 Solara V6, Auto Trans
$3900.00

00646-17620-305
98-00 Sienna V6, Auto Trans
$3600.00

So ... if you're getting a new pulley, and are curious what belt size you're going to need ...

The stock belt for my series 1 95 car is a kelly springfield 860K6 - meaning the belt is 860mm, and has 6 ribs.

Estimating that the belt is in contact with half of the SC pulley, and knowing the pulley diameters, it'* pretty easy to calculate what new belt lengths will be necessary for which pulley...


pulley belt length
3 860
2.75 850
2.6 844
2.4 836
2.2 828
2 820

Now, using your trusty browser to snoop around the Autozone inventory, you'll happily find that the belt part numbers Kelly Springfield 850K6, 835K6, 827K6, etc., are all ready to go on your car for the wonderful prices of between $17 and $24.



(Dan pats himself on back) patt patt patt

Hmmmmm.....this opens up a world of possibilites. Maybe I can leverage SCperformance by telling them I'm going to suggest pulley boys to 450 members here if they don't answer my call. Next step down for me is 2.25"......and I'm ready to do this now. Thanks for the info!

WOW! Thanks so much DAN! I am about to order a 2.4 inch pulley right now! I have also been routinely leaving messages with scperformance and NOTHING! I am so thankful you've shed light on this!


Dave

Hey Dave and Dan....you guys wanna have some fun with SCP and teach 'em what customer service is? I think we've got the clout behind us. I really can't stand people who don't return calls......maybe it'* hammer-time

Will,

I'm down for whatever you've got planned! I've gotten really annoyed with those guys! Just tell me where to sign up!

Dave