[97BlackAckCL]

Originally Posted by Akkording

There are plenty of silent sleeper SC members on this forum enjoying the boosted life and I don't see them replacing their drivetrain, well at least it was not told in their build threads.

That was my thought as well, especially since Toyota/TRD used to sell the Magnuson as a dealer add on

[Whippersnapper02]

Originally Posted by 97BlackAckCL

That was my thought as well, especially since Toyota/TRD used to sell the Magnuson as a dealer add on

I think he's talking about people that use way too much tension with a manual tensioner instead of using a wider or cog belt system to prevent slip.

[Charles Bronson]

Originally Posted by redneckj

The procharger will be fun till your crank breaks. Your transmission will probably fail 2-3 times before the crank fails. Fun cost alot of money!!!

I just love reliability. Stock powertrain for me!

Crank breaks? WHAT ARE YOU TALKING ABOUT? Do you know anything about motors? I think not. LOL

[91foxbody]

Originally Posted by Charles Bronson

Crank breaks? WHAT ARE YOU TALKING ABOUT? Do you know anything about motors? I think not. LOL

It’s not uncommon on centrifugally supercharged cars with tons of belt tension.


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[Charles Bronson]

It's awesome to see another SC option available. The install looks clean and the quality good.

For me personally, I think the Magnuson SC is the better option for a vehicle like this. I prefer the power curve and packaging especially with the charge air cooler under the SC. Lastly, I have a sour taste in my mouth fixing so many friend's Procharged Mustangs and Camaros years ago that would shred and/or lose belts or kill idler pullies every 5K miles. Maybe they've improved things. It's unfortunate because Procharger is only about 15 miles from me.

[rdruss]

Originally Posted by Charles Bronson

It's awesome to see another SC option available. The install looks clean and the quality good.

For me personally, I think the Magnuson SC is the better option for a vehicle like this. I prefer the power curve and packaging especially with the charge air cooler under the SC. Lastly, I have a sour taste in my mouth fixing so many friend's Procharged Mustangs and Camaros years ago that would shred and/or lose belts or kill idler pullies every 5K miles. Maybe they've improved things. It's unfortunate because Procharger is only about 15 miles from me.

Not disputing what you say, but it seems to me that the Magnuson would be tougher on belts than the Procharger. You can spin the Procharger by hand pretty easily can't you? Mustang/Camaro guys probably put a "dime sized" pulley on the Pro for more boost.

[Bmnorm2]

A centrifugal supercharger requires significantly less power than a roots or twin screw when comparing similar mass flow rates. Regardless, too much belt tension will result in failed pulleys/bearings/bolts or the belt itself. It sure as hell won’t break your crank.

Anyone who’s only claim of failing engines due to increased power and only mentions “cranks” can immediately be ignored. Crankshaft failure is the least likely.


OP - please keep us posted on fuel economy and all of your observations and experiences with the Pro Charger. Thanks for sharing and not being afraid of failing your crank.

A Rotrex kit would be nice...

[scratchhax]

I just did the 500 mile break in oil change and, so far, the only broken crank in the garage is me

Changing the oil was easy and procharger included a total of 4 oil changes worth of stuff. It came with the drain relocation kit installed so there is a valve that hangs just low enough that you can put a catch bottle on top of the front skid plate and just let it drain the 6oz of oil into that. The filling process is just remove the dipstick and squirt in another 6oz of oil. This type of SC needs the oil changed every 5k miles, so every tire rotation I'll swap out the fluid and bang out the air filter. Grand total of 10 minutes to do both.

The sounds have mellowed out a bit but the 1gr-fe just doesn't make enough noise with stock exhaust to even out the SC whine. It's hella loud at idle but god it sounds good when you get into it. So I just bought the Magnaflow 19546 catback and I'll bolt that on Monday .

Fuel economy is still off the charts. I'm hitting 22 with mixed highway/city driving and approaching 23.5 on the highway at 70mph. Now do keep in mind, I drive real easy. I don't speed, I don't generally dash from the stoplights and I spend a fair bit of time on the highway. I was consistently getting 21 before I added all the weight to my rig so this isn't out of line for me.

I have turned my pedal commander back on. With it off, there is that lovely dead spot when you stomp on the gas while you wait for the throttle body to open. Being able to hear the SC really makes that more pronounced (it's not, you just feel like it is because you get used to hearing every little move of the motor based on the whine). Shift points are a little wonky with the pedal commander and the SC, so I may have to play around with that a bit, we'll see.

First offroad trip is planned for late June when a big project I'm working on wraps up at work. Previous to the SC I was pricing out regearing but have decided it doesn't make sense anymore, I have plenty of power on tap.

[Charles Bronson]

Originally Posted by rdruss

Not disputing what you say, but it seems to me that the Magnuson would be tougher on belts than the Procharger. You can spin the Procharger by hand pretty easily can't you? Mustang/Camaro guys probably put a "dime sized" pulley on the Pro for more boost.

Not really. Belts and pulleys, SC or not, require very tight and uniform alignment. The issue is most centrifugal SCs tend to have more complex mounting and pulley systems and have the SC unit offset to the side some distance compared to most roots/screw type blowers that sit directly on the motor. With the SC offset and dangling on a mounting bracket, it is very difficult to get the pulleys and belts in perfect alignment. Alignment issues tend to cause excessive belt and pulley bearing wear.

OEMs use roots/screw type blowers for this reason as well as packaging and overall reliability. For all out power on the track, a centrifugal SC wins. For drag racing, most competitive racecars run roots/screw type blowers. IMO, if you're going to go with a centrifugal SC, you might as well go with turbo as it has WAY few moving parts and gives you massive low and midrange power plus a topend charge. Most everyone has gone turbo, both in the OEM and aftermarket.

And please don't take any of this the wrong way and I think it's great that we have more power options for these trucks. It's quite possible that this Procharger unit is super reliable.

[scratchhax]

It's a good point. I do have this massive 1 inch thick bracket hanging off the side of the motor now and the bottom pulley had to be swapped out to make this work. If you aren't careful you can cause some real premature wear by being out of alignment. Thankfully I have a good local shop and as near as I can tell everything is spot on.

Originally Posted by Charles Bronson

Not really. Belts and pulleys, SC or not, require very tight and uniform alignment. The issue is most centrifugal SCs tend to have more complex mounting and pulley systems and have the SC unit offset to the side some distance compared to most roots/screw type blowers that sit directly on the motor. With the SC offset and dangling on a mounting bracket, it is very difficult to get the pulleys and belts in perfect alignment. Alignment issues tend to cause excessive belt and pulley bearing wear.

OEMs use roots/screw type blowers for this reason as well as packaging and overall reliability. For all out power on the track, a centrifugal SC wins. For drag racing, most competitive racecars run roots/screw type blowers. IMO, if you're going to go with a centrifugal SC, you might as well go with turbo as it has WAY few moving parts and gives you massive low and midrange power plus a topend charge. Most everyone has gone turbo, both in the OEM and aftermarket.

And please don't take any of this the wrong way and I think it's great that we have more power options for these trucks. It's quite possible that this Procharger unit is super reliable.

[Pho thit cho]

Originally Posted by scratchhax

It's a good point. I do have this massive 1 inch thick bracket hanging off the side of the motor now and the bottom pulley had to be swapped out to make this work. If you aren't careful you can cause some real premature wear by being out of alignment. Thankfully I have a good local shop and as near as I can tell everything is spot on.

Any dyno numbers yet?

[RunTheJoules]

Originally Posted by 91foxbody

It’s not uncommon on centrifugally supercharged cars with tons of belt tension.

It must be pretty uncommon cause I've never heard of anyone snapping a crankshaft under any circumstances... I've blown out clutches, rearends, and transmissions myself, and seen others twist driveshafts, bend rods, snap belts, etc. But not one case if the crank breaking.

[scratchhax]

Not yet. They should have everything fixed up in the next few weeks (going back to the same shop because the re-run will be free) and I'm scheduled for June 9th.

Originally Posted by Pho thit cho

Any dyno numbers yet?

[91foxbody]

Originally Posted by RunTheJoules

It must be pretty uncommon cause I've never heard of anyone snapping a crankshaft under any circumstances... I've blown out clutches, rearends, and transmissions myself, and seen others twist driveshafts, bend rods, snap belts, etc. But not one case if the crank breaking.

Cranks snap at the snout on many supercharged cars. I'm not trying to be a pain in the ass, but the additional torque applied to the front of the crank from the pulley for driving the supercharger can be a problem on many engines.

ProCharger/Broken Crank Snout | Team Chevelle

Anyone break the crankshaft nose with supercharger? - CorvetteForum - Chevrolet Corvette Forum Discussion

Please post your experience with Cracked Crank from Supercharger - Third Generation F-Body Message Boards

[scratchhax]

No I haven't been dogging it at 60, traffic was slowing down on I70 and it felt like a safe time to take a shot, usually it's 70 at least. But there we go. it's official, my fully armored, steel bumpered, roof racked 3 inch lift 33x11.5 4runner is getting at least 23 mpg city/highway.