Procharger pullies
 

Who has changed the Procharger pulley on the unit and what is involved in changing this?

I changed gears in lower unit and slowed my engine RPM's down and now I want my boost back.
Is Procharger(Accessible Technologies) the only and most reasonable place to buy a new pulley, other threads mention a name or two that sell them, but need more details?

Re: Procharger pullies
 

I have a couple, how many groves and what size do you need?

Re: Procharger pullies
 

After speaking with Procharger you only have to remove the one bolt and the pulley is on a keyway and it pops off, you may have to start it with a gear puller. They indicated it was no big deal at all. They run about $95.00 a piece for new pullies. Marc is kind enough to be checking his stock for some extra pullies he may have on hand.

Re: Procharger pullies
 

call kim or rob at rw marine in ohio. $80 or so for the pulleys.1-717-938-8545
make sure you tell them brian colombo sent you. :)

Re: Procharger pullies
 

Sometimes it is better to pull the procharger off the motor to change pulleys,on mine it is so close to back seat you would have to whack pulley with something to get it to come off in boat (no room for puller).I have 3 pulleys i'd like to sell (cheap)-8rib,7/8's bore for m-3sc,4.500 dia,4.250dia,3.850 dia,Smitty

Re: Procharger pullies
 

When changing pulley, loosen bolt on pulley before you loosen the belt. The belt will help keep the pulley from spinning. The pulley's come in 8 & 12 rib with different back spacing. It's easy to change.

Re: Procharger pullies
 

I am pretty sure that mine are the twelve groove design. I will double check on mine with the backspacing as well.

Re: Procharger pullies
 

The M4 has 12 rib belt. Crank pulley is 8.5" & pulley on procharger is 5.5, or 5". I tried to buy a new belt from Gates but their 12 rib belts have a totaly different rib spacing then the belt prochrger uses. I am guessing you could go to a 4.5" if you have a 5" now but need to start worring about over reving unit. Remember putting a smaller pulley on will not only increase the boost at low speed but will increase it at max RPM's

I see where procharger now offers a cloged belt. Might be the way to go since it will take a load of the procharger & crank bearing

Re: Procharger pullies
 

My pulley i am using currently is a 4.5 so I ordered a 4.0 pulley and was told it would increase my boost 3-5 lbs. That ought to get it done. :cool: Going to the 1.26 gears really dropped down my boost across the board and i like the extra power of more boost. Fantastic cruise speed at 4000 RPM's with this gear ratio. :eek:

Re: Procharger pullies
 

JS- What lower pulley do you have. With the 8.5" lower & 5.5" upper I am running 11lbs @5800.

Re: Procharger pullies
 

I have the 8.5 lower pulley as well, however I really pulled my RPM's down with 1.26 gears and a 32 pitch prop. I am looking for a top RPM of 5300-5400. It really takes the HP to turn the 32 against the 1.26 gears, but like I said what a great cruise speed, for 3500-4000. What setup-gears&prop, are you using now Jack and what top speed are you getting at that 5800 RPM.

Re: Procharger pullies
 

cancel that order. i have a 4.5, 4.25, and a 4.0 12 rib i can sell you for 60 ea. great shape. let me know

Re: Procharger pullies
 

They are due on my doorstep any hour now. However after trying the 4.0 if it's too much boost I will be intersted in the 4.25. I wish you would have stepped up a day ago I would have bought both 4.00 and 4.25 from you, I also ordered a new belt, mine was starting to fray, I was down to a 11 rib belt instead of twelve. It was like strings hanging off your clothes I couldn't resist pulling them. :rolleyes:
JS

Re: Procharger pullies
 

Hey Jack and John,
where did you get a 8.5 crank pulley?
I didn't know ProCharger offered one :cool:
I run 7-8 lbs at 5600-5700 rpm with a 4.5 upper and the standard lower which I believe is around 6.6". I don't need more but I was just curious. PC told me they only had one size for the BB setup.
I see why your making so much boost with a 5.5 pulley :D
Dave

Re: Procharger pullies
 

The lower 8.5 pulley is what came stock with my M-4 from the getgo, this is the first time i have changed pullies on mine since 2001. As well another friend bought his M-4 at the same time and he has an 8.5 lower, maybe it was standard at the time.

Re: Procharger pullies
 

Still testing on props, got a 29 5 blade hydromotive to try this weekend.

Setup is, extention box, prop is 1/2" above the lower part of outside sponsons, 1.36 gears.

I just put the lower on this summer & everthing has been keeping me for going to the water. Of the few times I got to go
Best speed was 102.9 @ 5700 with 30" bravo, slipping blower belt, & shut down when I saw I was running out of real estate. I had shut down when GPS said 100.1 due to no more real estate & when I checked the recall I was at 102.9 Blower belt was also slipping since I was only pulling 5 lbs of boost. So who know where top end on that really is.

Tried 27 p5x hydromotive & was on rev limiter @ 5950 (shuts motor off at 5950, restarts @ 5600) Speed was 101.7, blower belt was again slipping & only 7lbs of boost but was on rev limiter

I bought a new belt also since mine was also 11 ribs istead of 12.
As I stated trying new 29 p5x this weekend so will see where top end is. Remember I have a big heavy bowrider in front.

Pulleys now running 8.5 lower (came with m5 procharger kit) & 5" upper. If it slips again this weekend I am going with the procharger clog belt setup that they are using with the M5. Based on injector duty cycle when I was running the 27" prop motor on rev limiter Motor was only putting out about 800hp.

Re: Procharger pullies
 

The conversation I had with them was two years ago and as we all know, any conversation with them is vague at best :D
Must be an M4/5 thing...Interesting though; guess it allows you to run BIG boost numbers without getting too small on the upper pulley and loosing surface area which would in turn, lead to slip. The cog may be a good thing for you.
How do you like your P5-X. I'm running a 27 on my 28 Nordic and at 5000 feet elevation I'm getting 86 mph GPS at 5700 rpm. It has really made a huge difference on our boat. I'll be trying a 29 in October when dropping down to Lake Mead (1200 feet).
Do you have any more ECU logs I can peek at?
Later,
Dave

Re: Procharger pullies
 

I tried out my 4.0 pulley and it really woke the motor up, although I did not make a top end blast it was real strong at partial throttle, huge differrence from last weekend. The most I saw was 8 lbs without cranking past 4000 RPM's. Plugs looked nice and clean, porcelain dark tan color. My computer battery quit on me so I couldn't read my Wid Band O2 sensor. I'll take another shot at it later this weekend.
JS